Dodge Ram 3500 NY 4500 NY and 5500 NY from East Hills Jeep
Video Clips. Duration : 1.85 Mins.
Dodge Ram 3500 NY 4500 NY and 5500 NY from East Hills Jeep
visit us at www.easthillsChryslerjeepdodge.com Dodge Ram 3500 NY, Pulls its own weight, and then some. Dodge Ram 4500 NY, Pulls its own weight, and then some more. Dodge Ram 5500 NY, Pulls its own weight, and then a lot more. The Dodge Ram NY Chassis Cab is offered in 3500, 4500 and 5500 models, and is a hauling force with big rig proportions and "job rated" success. All models are available in four-door Quad Cab or two-door regular cab configurations. Towing capacities are up to 17500 pounds for the 3500 Chassis Cab with a payload of up to 6710 pounds; up to 18400 pounds for the 4500 Chassis Cab with a payload of up to 8900 pounds; and up to 18350 pounds for the 5500 Chassis Cab with a payload of up to 11880 pounds. These trucks are tough enough to handle any job and offer a world of convenience in standard and optional features such as: 40/20/40 split-folding front bench seat, stain-resistant fabric, storage bins throughout the cab, available voice-activated hands-free calling for Bluetooth-compatible phones, auxiliary stereo input jack for your iPod or portable MP3 player, and SIRIUS Satellite Radio with over 130 channels of programming. Safety features include four-wheel anti-lock brake system, and advanced multistage driver and front-passenger airbags. Learn more about Dodge Ram NY Chassis Cab trucks by visiting our website and scheduling a test drive today.
Dodge Ram 3500 NY 4500 NY and 5500 NY from East Hills Jeep
Dodge Ram 3500 NY 4500 NY and 5500 NY from East Hills Jeep
Dodge Ram 3500 NY 4500 NY and 5500 NY from East Hills Jeep
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Satellite Radio: Installation Costs
The cost of a satellite radio installation is broken down into two different groups, the startup (installation costs) and the monthly subscription to either XM satellite radio or Sirius satellite radio. Receivers and mounting hardware, the cost of activation are all start up costs. Recievers are available for your car, your home, your computer and now portable receivers are available. So how much does satellite radio installation really cost?
Satellite Radio: Installation Costs
Life On Hold - Forever and Always - Live at Greeley Park, 20
Video Clips. Duration : 3.55 Mins.
Life On Hold - Forever and Always - Live at Greeley Park, 20
June 19th, 2010 - Forever and Always - Life On Hold, Live at Greeley Park This video was taken on a Flip UltraHD with no auxiliary audio input, at an open air festival, with volunteers manning the sound board. Please excuse the sound quality. Want to hear Life On Hold the way these songs are meant to? Come to one of their live shows! Can't make it? Buy their first EP, The Element of Surprise ( www.lifeonholdstore.com ) or second EP, The Run-Around EP (www.lifeonholdstore.com ). The songs featured at this show were mostly from The Run-Around, with Balladeer coming from The Element of Surprise. www.myspace.com www.facebook.com www.lifeonholdstore.com This video is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License. Please visit creativecommons.org for more information.
Life On Hold - Forever and Always - Live at Greeley Park, 20
Life On Hold - Forever and Always - Live at Greeley Park, 20
Life On Hold - Forever and Always - Live at Greeley Park, 20
No URL Life On Hold - Forever and Always - Live at Greeley Park, 20
How to Reset an Xbox 360
Please check the following before continuing:
How to Reset an Xbox 360
2014 Nissan NV200 Taxi Of Tomorrow - New York City
Tube. Duration : 4.87 Mins.
2014 Nissan NV200 Taxi Of Tomorrow - New York City
Audio file (Grazin') provided by www.audiomicro.com Nissan Taxi Of Tomorrow Makes World Debut On Eve Of 2012 New York International Auto Show Available for public viewing beginning April 6; Driver and passenger input informs key vehicle features; Coming to New York City streets next year Each day, 600000 New Yorkers hop in the back of a taxi - the iconic yellow cab that is a symbol of New York City around the world. Starting today, the first full vehicle prototype of the Taxi of Tomorrow can be seen by drivers, passengers and owners. The 2014 Nissan NV200 Taxi, New York's Taxi of Tomorrow, will make its global debut tonight at a special event in SoHo with Nissan President and CEO Carlos Ghosn and New York City Mayor Michael R. Bloomberg. Following the event, the Taxi of Tomorrow is headed to the 2012 New York International Auto Show, where it will be on display for New Yorkers and visitors from around the world. The auto show at the Jacob Javits Center is open to the public April 6-15. "We're proud to introduce a new era of urban mobility to New York with the Nissan NV200 Taxi - New York City's Taxi of Tomorrow," Ghosn said. "The exclusive Taxi of Tomorrow draws on Nissan's global experience in commercial vehicles, as well as insight from New York City taxi drivers and passengers, who helped identify important improvements over today's cabs. The Nissan taxi will deliver unprecedented levels of innovation and comfort to New York's 600000 daily taxi riders." After a ...
2014 Nissan NV200 Taxi Of Tomorrow - New York City
2014 Nissan NV200 Taxi Of Tomorrow - New York City
2014 Nissan NV200 Taxi Of Tomorrow - New York City
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The Importance of Grammar and Verbal Tense in ESL Teaching
Grammar and ESL Teaching: Past and Present Tense
The Importance of Grammar and Verbal Tense in ESL Teaching
All New Bose® A20™ Aviation Headset from Sporty's Pilot Shop
Video Clips. Duration : 4.10 Mins.
All New Bose® A20™ Aviation Headset from Sporty's Pilot Shop
Visit www.sportys.com for more information or to order! Bose was the first to introduce active noise reduction headsets to aviation more than 20 years ago, forever changing the way pilots fly. Now, the Bose A20 Aviation Headset introduces an entirely new standard. It is quite simply the quietest, most technologically advanced aviation headset ever available from Bose. Features • Significantly greater noise reduction—we were simply amazed at how quiet this headset is • Improved level of comfort—1/3rd less clamping force than most aviation headsets • Clear audio—famous Bose quality is evident in the speakers and microphone • Bluetooth communications interface—connect your phone for hands-free calling • Auxiliary audio input—now passengers can listen to music • Priority switching—you decide which audio source you want to hear (intercom, music, phone) • Made in the USA—meets or exceeds all TSO standards The ergonomic control module features independent volume controls. Runs for over 45 hours on just 2 AA batteries. Weighs just 12 oz., includes carrying case, five year warranty.
All New Bose® A20™ Aviation Headset from Sporty's Pilot Shop
All New Bose® A20™ Aviation Headset from Sporty's Pilot Shop
All New Bose® A20™ Aviation Headset from Sporty's Pilot Shop
No URL All New Bose® A20™ Aviation Headset from Sporty's Pilot Shop
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Digester systems that convert waste material into biogas are becoming more prevalent throughout the world. Rural farmers now have a means to produce good quality fertilizer and biogas from waste materials like manure in a cheap renewable way.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
'Wii Mote Style' Mouse for PC Using x-IMU
Video Clips. Duration : 1.90 Mins.
'Wii Mote Style' Mouse for PC Using x-IMU
This open source project demonstrates how the x-IMU can be used as a 'Wii mote style' mouse for the PC. The x-IMU auxiliary port mode is configured as digital I/O to interface to 2 external switches functioning as the mouse left and right buttons. These buttons were created with 2 tactile switches, a small piece of stripboard and header connector to attached directly to the auxiliary port. The PC application created using the x-IMU API automatically connects (and re-connect) to the x-IMU and parses the received orientation and button data to Windows as a mouse input. For more information and source code, see: www.x-io.co.uk
'Wii Mote Style' Mouse for PC Using x-IMU
'Wii Mote Style' Mouse for PC Using x-IMU
'Wii Mote Style' Mouse for PC Using x-IMU
No URL 'Wii Mote Style' Mouse for PC Using x-IMU
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Digester systems that convert waste material into biogas are becoming more prevalent throughout the world. Rural farmers now have a means to produce good quality fertilizer and biogas from waste materials like manure in a cheap renewable way.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Kensington Noise-Reducing AUX Audio Cable Demo
Video Clips. Duration : 1.62 Mins.
Kensington Noise-Reducing AUX Audio Cable Demo
This here is a demo of the Noise Reducing audio cable by Kensington, basically if you charge your phone and listen to it at the same time through your car audio system, you'd probably hear a very irritating huming noise in sync with the car engine. By plugging in this cable between your phone/mp3 player and your car audio system this pretty much eliminates the noise. I'm pretty sure this is what people call a ground loop isolator though
Kensington Noise-Reducing AUX Audio Cable Demo
Kensington Noise-Reducing AUX Audio Cable Demo
Kensington Noise-Reducing AUX Audio Cable Demo
No URL Kensington Noise-Reducing AUX Audio Cable Demo
Network Management Components - The Basics of an Effective Management Strategy
Overview:
Network Management Components - The Basics of an Effective Management Strategy
2010 Chevrolet Aveo LS Capitol Chevy Cadillac Subaru New
Tube. Duration : 0.95 Mins.
2010 Chevrolet Aveo LS Capitol Chevy Cadillac Subaru New
www.capitolauto.com 2010 Chevrolet Aveo LS- Imagine driving this Red 2010 Chevrolet Aveo LS,equipped with a 4 Cyl. engine and a 5 speed manual transmission. Enjoy an exceptional 35 miles to the gallon on this great car with features like OnStar Communication System, Tilt Steering Wheel, AM Stereo Radio, Auxiliary Audio Input, Front Bucket Seats, Console, Dual Air Bags, and much more. Enjoy the drive and have peace of mind in this 2010 Chevrolet Aveo LS. See us at Capitol Chevy Cadillac Subaru New & Used today! VIN- KL1TD5DE2AB101154 Capitol Chevy Cadillac Subaru New & Used 2711 Mission Street SE Salem, Oregon 97302 Phone:503-585-4141 www.capitolauto.com
2010 Chevrolet Aveo LS Capitol Chevy Cadillac Subaru New
2010 Chevrolet Aveo LS Capitol Chevy Cadillac Subaru New
2010 Chevrolet Aveo LS Capitol Chevy Cadillac Subaru New
No URL 2010 Chevrolet Aveo LS Capitol Chevy Cadillac Subaru New
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Digester systems that convert waste material into biogas are becoming more prevalent throughout the world. Rural farmers now have a means to produce good quality fertilizer and biogas from waste materials like manure in a cheap renewable way.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
E46 BMW 330i Full OEM Navigation Sirius Aux iPod Retrofit Success!
Video Clips. Duration : 7.25 Mins.
E46 BMW 330i Full OEM Navigation Sirius Aux iPod Retrofit Success!
E46 BMW 330i Full OEM Navigation Sirius Aux iPod Retrofit Success
E46 BMW 330i Full OEM Navigation Sirius Aux iPod Retrofit Success!
E46 BMW 330i Full OEM Navigation Sirius Aux iPod Retrofit Success!
E46 BMW 330i Full OEM Navigation Sirius Aux iPod Retrofit Success!
No URL E46 BMW 330i Full OEM Navigation Sirius Aux iPod Retrofit Success!
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Digester systems that convert waste material into biogas are becoming more prevalent throughout the world. Rural farmers now have a means to produce good quality fertilizer and biogas from waste materials like manure in a cheap renewable way.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
How To Remove Dash and Install OEM Radio in a 1995 Buick Roadmaster Limited
Video Clips. Duration : 10.02 Mins.
How To Remove Dash and Install OEM Radio in a 1995 Buick Roadmaster Limited
I know I searched for videos forever to figure out how to remove the dash for those looking to install radios but I couldn't find any, therefore I made my own. In this video I go step by step in how to remove the dash and access the radio for replacement. I replaced the stock radio for an OEM monsoon unit with AUX input due to the tape player going on the fritz on the stock unit. For OEM swaps, it's extremely simple to do and my set up worked out great!. I also go over all the details of the system, theftlock, and all the other info you're looking for. For installation of aftermarket units, I show where the wiring harness and antenna is so you can splice your wires for your system. Other than that I tried to make it as informative and entertaining as I could! Hope you all enjoy and if you have any questions let me know and I'll try to answer!
How To Remove Dash and Install OEM Radio in a 1995 Buick Roadmaster Limited
How To Remove Dash and Install OEM Radio in a 1995 Buick Roadmaster Limited
How To Remove Dash and Install OEM Radio in a 1995 Buick Roadmaster Limited
No URL How To Remove Dash and Install OEM Radio in a 1995 Buick Roadmaster Limited
Network Management Components - The Basics of an Effective Management Strategy
Overview:
Network Management Components - The Basics of an Effective Management Strategy
2008 BMW X5 4.8i Black A2673
Video Clips. Duration : 4.03 Mins.
2008 BMW X5 4.8i Black A2673
www.autosofpalmbeach.com Your new Black Sapphire Metallic 2008 BMW X5 4.8i with Premium Package, Technology Package, Rear Climate Package, Comfort Access System, Rear Seat Entertainment, Satellite Radio, and Third Row Seating will leave you breathless. It has several upgrades making it one of the most comfortable and nicest cars on the road! This great car has been treated well and is ready for you to take the wheel. This is a one owner Carfax certified vehicle with no accident damage. There's so much more to love about this sport activity vehicle so let's take a closer look at your new 2008 BMW X5 4.8i. EXTERIOR: The exterior BLACK SAPPHIRE METALLIC paint is in extraordinary shape, and makes the X5 look like it could pass for a new. Your friends will be amazed at not only the beauty of your vehicle, but also the amount of money you saved! Just take a look at the shapely curves. Nice 18" alloy wheels outfit the car for a very sporty look. With a 4.8 liter V8 xDrive All-Wheel Drive engine, the X5 has great power to get you up and moving. Thanks to its 350 horsepower engine with 350 lb-ft of torque, you'll never be at a loss for power. Adding a cool look and helping keep you visible and seeing well during the darkest nights are xenon adaptive automatic headlights with dynamic auto-leveling. Additionally, halogen fog lamps will provide help in even the worst weather. For even more protection against the elements, your power heated mirrors will eliminate distracting and ...
2008 BMW X5 4.8i Black A2673
2008 BMW X5 4.8i Black A2673
2008 BMW X5 4.8i Black A2673
No URL 2008 BMW X5 4.8i Black A2673
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Digester systems that convert waste material into biogas are becoming more prevalent throughout the world. Rural farmers now have a means to produce good quality fertilizer and biogas from waste materials like manure in a cheap renewable way.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Crazynail art printer--all-in-one printer--www.crazynail.com
Video Clips. Duration : 2.40 Mins.
Crazynail art printer--all-in-one printer--www.crazynail.com
Crazynail art printer--all-in-one printer--www.crazynail.com Features: ● Able to paint 10 artificial fingernails/toenails or 1 natural nail in one time; ● Integrated design without any auxiliary devices; ● Built-in various nail patterns; input through multiple memory cards available; ● Able to shape patterns with templates and change colors; ● Real-time shots for nail pattern use; ● 12`screen with graphic interface andtouch-screen based operation; ● Auto/Manual adjustment in size, direction and position of nail patterns; ● Able to work with a coin identifier; auto print count, upgrade software and add music & voice prompts; ● Able to select different language; ● Able to apply in shopping malls,supermarkets and fashion store etc. characterized by one-stop, fast service; ● Able to be a device to produce finished artificial nails; ● Able to be used as auxiliary apparatuses by nail and beauty salons. ▼Specification: Power supply: AC110/220V±10% 50-60Hz Power consumption:200W Machine dimension(mm): 420 (W)640 (H)340 (D) Packing dimension(mm): 520 (W)740 (H)435 (D) Net weight: 25kg Gross weight: 32kg ************************** Mr.Mike General manager Mobile:0086-13881719829 (call anytime) Tel:0086-411-83895467 Fax:0086-411-83895467 Jinyubaiti@yahoo.com.cn www.crazynail.com MSN messenger: jinyubaiti@hotmail.com Yahoo messenger: jinyubaiti@yahoo.com.cn No118.zhifu street, Dalian. China.
Crazynail art printer--all-in-one printer--www.crazynail.com
Crazynail art printer--all-in-one printer--www.crazynail.com
Crazynail art printer--all-in-one printer--www.crazynail.com
No URL Crazynail art printer--all-in-one printer--www.crazynail.com
How to Reset an Xbox 360
Please check the following before continuing:
How to Reset an Xbox 360
Вывод Aux на штатной магнитоле (Citroen C4).mp4
Tube. Duration : 5.22 Mins.
Вывод Aux на штатной магнитоле (Citroen C4).mp4
Вывод Aux на штатной магнитоле (Citroen C4).mp4
Вывод Aux на штатной магнитоле (Citroen C4).mp4
Вывод Aux на штатной магнитоле (Citroen C4).mp4
No URL Вывод Aux на штатной магнитоле (Citroen C4).mp4
Keywords:
Make sure all the connections are plugged in correctly.
Auxiliary Input
How to Reset an Xbox 360
Make sure the Xbox 360 Console has power.
How to Reset an Xbox 360
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Make sure your TV or VCR is set to the correct Video Input. The Video Input name differs for different TVs or VCRs. For example, the input name may be Input Select, AUX, Line In, Line, In, Input, Source, or EXT. For more information, see the manual for the TV or for the VCR.
If the problem continues the try one of the following steps on How to Reset your Xbox 360.
If you get a picture without sound, follow these steps to reset your Xbox:
1. Make sure that you connect the video connectors and the audio connectors to the same input group on the back of the TV.
2. If you use digital audio, verify the following:
* Make sure that the audio receiver is turned on.
* Make sure that the audio output setting in the Xbox Dashboard corresponds to the setting on the TV.
* Make sure that you connect the console to the digital audio connector on the TV or audio receiver by using an S/PDIF optical connection or a "TosLink" cable.
If you get sound without a picture or bad picture, follow these steps to reset your Xbox:
1. Verify the following:
* Make sure that your TV is set to the same video broadcast system as your Xbox 360 console (PAL or NTSC). For example, if your Xbox 360 console is an NTSC console, make sure that your TV supports NTSC.
* If your Xbox 360 console is a PAL console, set your PAL settings to PAL 60.
* If your TV has a type of picture compensation enabled, disable it. Examples of picture compensation include the following:
Dynamic contrast
Automatic compensation
Contrast detection
Light detector
These features may have different names depending on the make and the model of your TV.
2. Turn off your Xbox 360 Console if its not already off.
3. Turn on your Xbox 360 Console.
*Note: If you are using an Xbox 360 Wireless Controller, turn on the console by using the Xbox Guide button on the controller. Wait for the guide light to indicate that the controller has linked to the console.
*Note: Make sure that you use the player one controller when you do this. The player one controller is indicated by the upper-left quadrant light on the console.
2. As the console starts up, hold the right trigger, and then press and hold the Y button as the console starts. If you see a picture on the display after you try this step, you can continue to use the 640x480 resolution, or you can try to use a higher resolution setting. If you still cannot see a picture, continue to the next steps.
3. Disconnect the VGA High Definition cable from the display, and then remove the console power cord from the power outlet.
4. Wait five seconds or so.
5. Reconnect the console power cord to the power outlet, and then turn on the console.
6. Reconnect the VGA High Definition cable to the display. If you can see a picture on the display after you try this step, you can continue to use the 640x480 resolution, or you can try to use a higher resolution setting.
How to Reset an Xbox 360
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The problem is that this biogas produced is roughly 60% methane and 29% Co2 with trace elements of H2S, and is not up to the quality of 99% pure methane natural gas if the owner was planning on selling this gas or using it as fuel gas for machinery. The corrosive nature of H2S alone is enough to destroy the internals of expensive plant.
Auxiliary Input
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
The solution is the implementation of a biogas upgrading or purification system. Biogas upgrading is a series of processes where the gas is first cleaned from contaminants and then dried, so that what is left at the end of the process is 98%+ methane fuel gas. Manufacturers that produce biogas purification systems each have their own different processes and technology that they employ to produce the sales quality gas. A few of them are detailed below.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
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Water Washing
This is the most common method of purifying biogas. Here raw biogas from the digester is compressed and fed into the scrubber vessel where passing water streams adsorb the gas contaminants leaving near pure methane. The gas is then dried by dessicant in the drier columns and exit the system as 98%+ pure natural gas.
Pressure Swing Adsorption
Otherwise known as PSA, this purification method separates the Co2, Nitrogen, Oxygen and Water from the raw biogas stream by adsorbing gases at high pressure and desorbing them at low pressure as waste. The PSA system usually consists of 4 different adsorption columns working in sequence; Adsorption, depressurizing, desorption and repressurizing.
The raw biogas is compressed and fed into the bottom of the adsorption column where it is purified. during this time the remaining columns regenerate, such that there is always 1 absorber column actively cleaning gas. PSA does not scrub hydrogen sulphide so this most be removed before it enters the compressor.
Polyglycol
Using polyglycol (Tradename Selexol)to purify biogas is similar to the water washing method with regeneration. Selexol can adsorb hydrogen sulphide, carbon dioxide and water. However the energy required to regenerate the solution after adsorbing H2S is high, so hydrogen sulphide is removed before the process.
Chemical Reaction
Raw biogas can be upgraded by various chemical reactions that remove the C02 and other contaminants from the gas stream. The chemicals such as Alkanolamines react at atmospheric pressure in an adsorption column with the Co2 and are regenerated afterwards with steam. The hydrogen sulphide must first be removed to avoid toxifying the chemicals.
Advantages and Disadvantages
Each plant type fulfills its purpose of supplying high quality natural gas for grid injection. However depending on the site location, various environmental and economic factors might make selecting a certain type of system a more sensible choice. For areas where water is an expensive resource a more appropriate choice would be a PSA or Selexol system which regenerate the adsorbent, however this has to be offset against the heat input required in regeneration.
Another important factor to consider is the methane loss associated with each design. The methane loss is measured using gas analyzers and flowmeters at the suction and discharge sides of the plant. Most plants are guaranteed by manufacturers to achieve a maximum 2% methane loss. Some recent studies however have measured between 8-10% methane loss at PSA and Selexol plant sites, possibly due to leaks and poor maintenance. Chemical systems have even lower guaranteed losses since the chemicals selectively react with the Co2 in the gas stream instead of adsorbing.
Energy Demands
For a biogas upgrading plant the auxiliary power required to drive the compressors, pumps etc is anywhere between 3-6% of the total energy output in the form of natural gas. The cost associated with upgrading biogas also decreases with larger plant size, a smallish plant of 100 metres cubed per hour will upgrade gas at more than twice the cost of a plant outputting 200 - 300 metres cubed per hour.
Conclusions
A Digestor is only the beginning of the process to convert biomass into useful high quality natural gas. A biogas purification system takes the raw biogas at around 60% methane from the digester and through a special process outputs 98% methane for ether use as fuel gas or supplied to the grid. The four main upgrading processes are water washing, pressure swing adsorption, polyglycol adsorption and chemical treatment. Water washing and PSA are the most predominantly used systems in the world today. Typical energy requirements for a biogas purification system are between 3-6% of the total methane output, with smaller plants cost more to run than larger ones. As digester systems become more common around the world and people begin to catch on to biogas as a renewable source of energy, no doubt we will see more of these systems become available and more innovative designs.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
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This article will define a network management strategy for managing the network. It is necessary to define how the equipment is going to be monitored and determine if the current management strategy is adequate or if new applications, equipment, protocols and processes must be identified. Management components are then integrated with infrastructure and security. These primary elements comprise any well-defined management strategy and should be considered when developing your strategy.
Auxiliary Input
Network Management Components - The Basics of an Effective Management Strategy
Network Management Strategy
Network Management Components - The Basics of an Effective Management Strategy
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· Network Management Groups
· SNMP Applications
· Monitored Devices and Events
Network Management Groups
· Fault
· Performance
· Device
· Security
· Change
· Configuration
· Implementation
Fault Management
This describes the pro-active monitoring of devices, circuits and servers for errors. It specifies what events are monitored and thresholds for generating alarms. Once the alarms are generated, there is an escalation process for addressing any errors. It could be a circuit problem, a router interface or a server link. Service level agreements with local loop providers and long distance IXC for circuit repair are important as is vendor equipment repair contracts. Out-of-band router management allows troubleshooting and configuration of routers with an attached modem. The support technician doesn't rely on the primary circuit to reach the router. They will utilize a separate analog dial line with a modem connected to the auxiliary port at the router. Escalation support processes are defined that are used by the network operations center (NOC) employees for effective problem resolution. These are some typical support activities:
· Established Tier support levels with job responsibilities well defined for each Tier group
· Defined severity levels and what Tier group is responsible
· Defined response times for severity levels
· Applications for trouble tickets
· Established troubleshooting procedures for employees
· Root Cause Analysis
· Survey support groups for skill levels, identify deficiencies and plan for training programs to address that.
Performance Management
This describes the pro-active monitoring of device, circuit and server performance levels. That translates to monitoring and reporting on trends with device CPU, memory and link utilization, circuit bandwidth utilization, server CPU, memory and disk input/output rate. As well campus segments and device interfaces should be monitored for collisions, CRC errors and packet drops. Bandwidth capacity planning is an on-going process of monitoring bandwidth utilization trends for the enterprise network and consideration of business growth estimates. That information is utilized for developing a provisioning strategy addressing company bandwidth capacity needs. The dynamic nature of an enterprise network is such that new locations, employees and application deployments will increase network traffic and utilize available bandwidth. Trend monitoring tools are typically run from the network operations center and focus on enterprise traffic patterns and performance of circuits, routers and switches.
RMON is a popular protocol that is utilized for monitoring router, switch and campus segment performance with probes at various offices across the enterprise. Information can be collected at all layers of the OSI model for statistics on utilizations, packet size and errors. In addition there are specific SNMP applications designed for bandwidth capacity planning. The bandwidth provisioning strategy could involve faster campus and WAN equipment, increased bandwidth for circuits, quality of service protocols or a combination of any of those elements.
Security Management
This describes the management of device and server security that is consistent with the policies of the corporation. Typical devices are firewalls, routers, switches, TACACS servers and RADIUS servers. Security includes community strings, password assignment, change policy, dial security and Internet security.
Device Management
This describes the maintenance of a database inventory that lists all campus and WAN devices, modules, serial numbers, IOS versions, server documentation and design. It is important that companies keep information on these assets for support and warranty issues.
Configuration Management
This describes the process of configuring, and documenting devices, circuits and servers on the enterprise network. A process for configuring new equipment, modifying current equipment and maintaining TFTP servers should be established. Those scripts should be saved to TFTP servers and documented for later use with subsequent configurations. Build a directory structure with a folder for each equipment type and subdirectories for model types.
Change Management
This describes a process for approving and coordinating device configuration changes and is essential for network availability. Staff members that make unapproved changes without alerting affected departments can cause problems if the changes don't work and are made during busier times of the day. Any changes to the production network should involve at least the network operation center and someone from the engineering group. As well it could be important to let the application developers know of network changes. Any change management process should have these components:
Review Process
· Affected departments consider impact of changes and discuss concerns
· Proof of concept and quality assurance testing
· Develop a timeline for changes approved by all departments
· Departments plan contingencies should there be network issues
· Approval process: software manages and records approvals from groups
· Pro-active monitoring of unauthorized changes
Implementation Management
This describes the process for managing new implementations such that there is no disruption to the production network and the implementation is efficient and effective. These are some network operations center (NOC) activities that should be part of any typical implementation management strategy. Consider vendor support contracts for support with configuration scripts, testing, and design since that will promote an effective implementation.
Standard Network Operations Center Activities:
1) Turn on circuits and ping all new devices to verify connectivity
2) Modify SNMP applications at network operations center for pro-active fault and performance monitoring of new devices
3) Verify devices are SNMP enabled and security is applied
4) Update the inventory database and save configuration scripts to a TFTP server
SNMP Applications
There are a myriad of SNMP applications on the market that focus on managing servers, devices and circuits. An enterprise customer will sometimes employ several applications including their own software that address each management group. The SNMP version that is implemented should be noted at each device and server. This is a list of popular commercial applications and how they could be utilized.
Monitored Devices and Events
Typical devices such as routers, switches and circuits are configured and monitored with SNMP applications. Thresholds are defined for each event that will trigger an alarm when that is exceeded. A polling interval is configured for each event, which describes the time interval between sending of status information from device to network management station. An example would be a router CPU utilization threshold of 60% and a polling interval of 10 minutes.
Network Management Components - The Basics of an Effective Management Strategy
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The problem is that this biogas produced is roughly 60% methane and 29% Co2 with trace elements of H2S, and is not up to the quality of 99% pure methane natural gas if the owner was planning on selling this gas or using it as fuel gas for machinery. The corrosive nature of H2S alone is enough to destroy the internals of expensive plant.
Auxiliary Input
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
The solution is the implementation of a biogas upgrading or purification system. Biogas upgrading is a series of processes where the gas is first cleaned from contaminants and then dried, so that what is left at the end of the process is 98%+ methane fuel gas. Manufacturers that produce biogas purification systems each have their own different processes and technology that they employ to produce the sales quality gas. A few of them are detailed below.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
No URL
Water Washing
This is the most common method of purifying biogas. Here raw biogas from the digester is compressed and fed into the scrubber vessel where passing water streams adsorb the gas contaminants leaving near pure methane. The gas is then dried by dessicant in the drier columns and exit the system as 98%+ pure natural gas.
Pressure Swing Adsorption
Otherwise known as PSA, this purification method separates the Co2, Nitrogen, Oxygen and Water from the raw biogas stream by adsorbing gases at high pressure and desorbing them at low pressure as waste. The PSA system usually consists of 4 different adsorption columns working in sequence; Adsorption, depressurizing, desorption and repressurizing.
The raw biogas is compressed and fed into the bottom of the adsorption column where it is purified. during this time the remaining columns regenerate, such that there is always 1 absorber column actively cleaning gas. PSA does not scrub hydrogen sulphide so this most be removed before it enters the compressor.
Polyglycol
Using polyglycol (Tradename Selexol)to purify biogas is similar to the water washing method with regeneration. Selexol can adsorb hydrogen sulphide, carbon dioxide and water. However the energy required to regenerate the solution after adsorbing H2S is high, so hydrogen sulphide is removed before the process.
Chemical Reaction
Raw biogas can be upgraded by various chemical reactions that remove the C02 and other contaminants from the gas stream. The chemicals such as Alkanolamines react at atmospheric pressure in an adsorption column with the Co2 and are regenerated afterwards with steam. The hydrogen sulphide must first be removed to avoid toxifying the chemicals.
Advantages and Disadvantages
Each plant type fulfills its purpose of supplying high quality natural gas for grid injection. However depending on the site location, various environmental and economic factors might make selecting a certain type of system a more sensible choice. For areas where water is an expensive resource a more appropriate choice would be a PSA or Selexol system which regenerate the adsorbent, however this has to be offset against the heat input required in regeneration.
Another important factor to consider is the methane loss associated with each design. The methane loss is measured using gas analyzers and flowmeters at the suction and discharge sides of the plant. Most plants are guaranteed by manufacturers to achieve a maximum 2% methane loss. Some recent studies however have measured between 8-10% methane loss at PSA and Selexol plant sites, possibly due to leaks and poor maintenance. Chemical systems have even lower guaranteed losses since the chemicals selectively react with the Co2 in the gas stream instead of adsorbing.
Energy Demands
For a biogas upgrading plant the auxiliary power required to drive the compressors, pumps etc is anywhere between 3-6% of the total energy output in the form of natural gas. The cost associated with upgrading biogas also decreases with larger plant size, a smallish plant of 100 metres cubed per hour will upgrade gas at more than twice the cost of a plant outputting 200 - 300 metres cubed per hour.
Conclusions
A Digestor is only the beginning of the process to convert biomass into useful high quality natural gas. A biogas purification system takes the raw biogas at around 60% methane from the digester and through a special process outputs 98% methane for ether use as fuel gas or supplied to the grid. The four main upgrading processes are water washing, pressure swing adsorption, polyglycol adsorption and chemical treatment. Water washing and PSA are the most predominantly used systems in the world today. Typical energy requirements for a biogas purification system are between 3-6% of the total methane output, with smaller plants cost more to run than larger ones. As digester systems become more common around the world and people begin to catch on to biogas as a renewable source of energy, no doubt we will see more of these systems become available and more innovative designs.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Keywords:
The problem is that this biogas produced is roughly 60% methane and 29% Co2 with trace elements of H2S, and is not up to the quality of 99% pure methane natural gas if the owner was planning on selling this gas or using it as fuel gas for machinery. The corrosive nature of H2S alone is enough to destroy the internals of expensive plant.
Auxiliary Input
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
The solution is the implementation of a biogas upgrading or purification system. Biogas upgrading is a series of processes where the gas is first cleaned from contaminants and then dried, so that what is left at the end of the process is 98%+ methane fuel gas. Manufacturers that produce biogas purification systems each have their own different processes and technology that they employ to produce the sales quality gas. A few of them are detailed below.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
No URL
Water Washing
This is the most common method of purifying biogas. Here raw biogas from the digester is compressed and fed into the scrubber vessel where passing water streams adsorb the gas contaminants leaving near pure methane. The gas is then dried by dessicant in the drier columns and exit the system as 98%+ pure natural gas.
Pressure Swing Adsorption
Otherwise known as PSA, this purification method separates the Co2, Nitrogen, Oxygen and Water from the raw biogas stream by adsorbing gases at high pressure and desorbing them at low pressure as waste. The PSA system usually consists of 4 different adsorption columns working in sequence; Adsorption, depressurizing, desorption and repressurizing.
The raw biogas is compressed and fed into the bottom of the adsorption column where it is purified. during this time the remaining columns regenerate, such that there is always 1 absorber column actively cleaning gas. PSA does not scrub hydrogen sulphide so this most be removed before it enters the compressor.
Polyglycol
Using polyglycol (Tradename Selexol)to purify biogas is similar to the water washing method with regeneration. Selexol can adsorb hydrogen sulphide, carbon dioxide and water. However the energy required to regenerate the solution after adsorbing H2S is high, so hydrogen sulphide is removed before the process.
Chemical Reaction
Raw biogas can be upgraded by various chemical reactions that remove the C02 and other contaminants from the gas stream. The chemicals such as Alkanolamines react at atmospheric pressure in an adsorption column with the Co2 and are regenerated afterwards with steam. The hydrogen sulphide must first be removed to avoid toxifying the chemicals.
Advantages and Disadvantages
Each plant type fulfills its purpose of supplying high quality natural gas for grid injection. However depending on the site location, various environmental and economic factors might make selecting a certain type of system a more sensible choice. For areas where water is an expensive resource a more appropriate choice would be a PSA or Selexol system which regenerate the adsorbent, however this has to be offset against the heat input required in regeneration.
Another important factor to consider is the methane loss associated with each design. The methane loss is measured using gas analyzers and flowmeters at the suction and discharge sides of the plant. Most plants are guaranteed by manufacturers to achieve a maximum 2% methane loss. Some recent studies however have measured between 8-10% methane loss at PSA and Selexol plant sites, possibly due to leaks and poor maintenance. Chemical systems have even lower guaranteed losses since the chemicals selectively react with the Co2 in the gas stream instead of adsorbing.
Energy Demands
For a biogas upgrading plant the auxiliary power required to drive the compressors, pumps etc is anywhere between 3-6% of the total energy output in the form of natural gas. The cost associated with upgrading biogas also decreases with larger plant size, a smallish plant of 100 metres cubed per hour will upgrade gas at more than twice the cost of a plant outputting 200 - 300 metres cubed per hour.
Conclusions
A Digestor is only the beginning of the process to convert biomass into useful high quality natural gas. A biogas purification system takes the raw biogas at around 60% methane from the digester and through a special process outputs 98% methane for ether use as fuel gas or supplied to the grid. The four main upgrading processes are water washing, pressure swing adsorption, polyglycol adsorption and chemical treatment. Water washing and PSA are the most predominantly used systems in the world today. Typical energy requirements for a biogas purification system are between 3-6% of the total methane output, with smaller plants cost more to run than larger ones. As digester systems become more common around the world and people begin to catch on to biogas as a renewable source of energy, no doubt we will see more of these systems become available and more innovative designs.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Tags:
This article will define a network management strategy for managing the network. It is necessary to define how the equipment is going to be monitored and determine if the current management strategy is adequate or if new applications, equipment, protocols and processes must be identified. Management components are then integrated with infrastructure and security. These primary elements comprise any well-defined management strategy and should be considered when developing your strategy.
Auxiliary Input
Network Management Components - The Basics of an Effective Management Strategy
Network Management Strategy
Network Management Components - The Basics of an Effective Management Strategy
No URL
· Network Management Groups
· SNMP Applications
· Monitored Devices and Events
Network Management Groups
· Fault
· Performance
· Device
· Security
· Change
· Configuration
· Implementation
Fault Management
This describes the pro-active monitoring of devices, circuits and servers for errors. It specifies what events are monitored and thresholds for generating alarms. Once the alarms are generated, there is an escalation process for addressing any errors. It could be a circuit problem, a router interface or a server link. Service level agreements with local loop providers and long distance IXC for circuit repair are important as is vendor equipment repair contracts. Out-of-band router management allows troubleshooting and configuration of routers with an attached modem. The support technician doesn't rely on the primary circuit to reach the router. They will utilize a separate analog dial line with a modem connected to the auxiliary port at the router. Escalation support processes are defined that are used by the network operations center (NOC) employees for effective problem resolution. These are some typical support activities:
· Established Tier support levels with job responsibilities well defined for each Tier group
· Defined severity levels and what Tier group is responsible
· Defined response times for severity levels
· Applications for trouble tickets
· Established troubleshooting procedures for employees
· Root Cause Analysis
· Survey support groups for skill levels, identify deficiencies and plan for training programs to address that.
Performance Management
This describes the pro-active monitoring of device, circuit and server performance levels. That translates to monitoring and reporting on trends with device CPU, memory and link utilization, circuit bandwidth utilization, server CPU, memory and disk input/output rate. As well campus segments and device interfaces should be monitored for collisions, CRC errors and packet drops. Bandwidth capacity planning is an on-going process of monitoring bandwidth utilization trends for the enterprise network and consideration of business growth estimates. That information is utilized for developing a provisioning strategy addressing company bandwidth capacity needs. The dynamic nature of an enterprise network is such that new locations, employees and application deployments will increase network traffic and utilize available bandwidth. Trend monitoring tools are typically run from the network operations center and focus on enterprise traffic patterns and performance of circuits, routers and switches.
RMON is a popular protocol that is utilized for monitoring router, switch and campus segment performance with probes at various offices across the enterprise. Information can be collected at all layers of the OSI model for statistics on utilizations, packet size and errors. In addition there are specific SNMP applications designed for bandwidth capacity planning. The bandwidth provisioning strategy could involve faster campus and WAN equipment, increased bandwidth for circuits, quality of service protocols or a combination of any of those elements.
Security Management
This describes the management of device and server security that is consistent with the policies of the corporation. Typical devices are firewalls, routers, switches, TACACS servers and RADIUS servers. Security includes community strings, password assignment, change policy, dial security and Internet security.
Device Management
This describes the maintenance of a database inventory that lists all campus and WAN devices, modules, serial numbers, IOS versions, server documentation and design. It is important that companies keep information on these assets for support and warranty issues.
Configuration Management
This describes the process of configuring, and documenting devices, circuits and servers on the enterprise network. A process for configuring new equipment, modifying current equipment and maintaining TFTP servers should be established. Those scripts should be saved to TFTP servers and documented for later use with subsequent configurations. Build a directory structure with a folder for each equipment type and subdirectories for model types.
Change Management
This describes a process for approving and coordinating device configuration changes and is essential for network availability. Staff members that make unapproved changes without alerting affected departments can cause problems if the changes don't work and are made during busier times of the day. Any changes to the production network should involve at least the network operation center and someone from the engineering group. As well it could be important to let the application developers know of network changes. Any change management process should have these components:
Review Process
· Affected departments consider impact of changes and discuss concerns
· Proof of concept and quality assurance testing
· Develop a timeline for changes approved by all departments
· Departments plan contingencies should there be network issues
· Approval process: software manages and records approvals from groups
· Pro-active monitoring of unauthorized changes
Implementation Management
This describes the process for managing new implementations such that there is no disruption to the production network and the implementation is efficient and effective. These are some network operations center (NOC) activities that should be part of any typical implementation management strategy. Consider vendor support contracts for support with configuration scripts, testing, and design since that will promote an effective implementation.
Standard Network Operations Center Activities:
1) Turn on circuits and ping all new devices to verify connectivity
2) Modify SNMP applications at network operations center for pro-active fault and performance monitoring of new devices
3) Verify devices are SNMP enabled and security is applied
4) Update the inventory database and save configuration scripts to a TFTP server
SNMP Applications
There are a myriad of SNMP applications on the market that focus on managing servers, devices and circuits. An enterprise customer will sometimes employ several applications including their own software that address each management group. The SNMP version that is implemented should be noted at each device and server. This is a list of popular commercial applications and how they could be utilized.
Monitored Devices and Events
Typical devices such as routers, switches and circuits are configured and monitored with SNMP applications. Thresholds are defined for each event that will trigger an alarm when that is exceeded. A polling interval is configured for each event, which describes the time interval between sending of status information from device to network management station. An example would be a router CPU utilization threshold of 60% and a polling interval of 10 minutes.
Network Management Components - The Basics of an Effective Management Strategy
Tags:
The problem is that this biogas produced is roughly 60% methane and 29% Co2 with trace elements of H2S, and is not up to the quality of 99% pure methane natural gas if the owner was planning on selling this gas or using it as fuel gas for machinery. The corrosive nature of H2S alone is enough to destroy the internals of expensive plant.
Auxiliary Input
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
The solution is the implementation of a biogas upgrading or purification system. Biogas upgrading is a series of processes where the gas is first cleaned from contaminants and then dried, so that what is left at the end of the process is 98%+ methane fuel gas. Manufacturers that produce biogas purification systems each have their own different processes and technology that they employ to produce the sales quality gas. A few of them are detailed below.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
No URL
Water Washing
This is the most common method of purifying biogas. Here raw biogas from the digester is compressed and fed into the scrubber vessel where passing water streams adsorb the gas contaminants leaving near pure methane. The gas is then dried by dessicant in the drier columns and exit the system as 98%+ pure natural gas.
Pressure Swing Adsorption
Otherwise known as PSA, this purification method separates the Co2, Nitrogen, Oxygen and Water from the raw biogas stream by adsorbing gases at high pressure and desorbing them at low pressure as waste. The PSA system usually consists of 4 different adsorption columns working in sequence; Adsorption, depressurizing, desorption and repressurizing.
The raw biogas is compressed and fed into the bottom of the adsorption column where it is purified. during this time the remaining columns regenerate, such that there is always 1 absorber column actively cleaning gas. PSA does not scrub hydrogen sulphide so this most be removed before it enters the compressor.
Polyglycol
Using polyglycol (Tradename Selexol)to purify biogas is similar to the water washing method with regeneration. Selexol can adsorb hydrogen sulphide, carbon dioxide and water. However the energy required to regenerate the solution after adsorbing H2S is high, so hydrogen sulphide is removed before the process.
Chemical Reaction
Raw biogas can be upgraded by various chemical reactions that remove the C02 and other contaminants from the gas stream. The chemicals such as Alkanolamines react at atmospheric pressure in an adsorption column with the Co2 and are regenerated afterwards with steam. The hydrogen sulphide must first be removed to avoid toxifying the chemicals.
Advantages and Disadvantages
Each plant type fulfills its purpose of supplying high quality natural gas for grid injection. However depending on the site location, various environmental and economic factors might make selecting a certain type of system a more sensible choice. For areas where water is an expensive resource a more appropriate choice would be a PSA or Selexol system which regenerate the adsorbent, however this has to be offset against the heat input required in regeneration.
Another important factor to consider is the methane loss associated with each design. The methane loss is measured using gas analyzers and flowmeters at the suction and discharge sides of the plant. Most plants are guaranteed by manufacturers to achieve a maximum 2% methane loss. Some recent studies however have measured between 8-10% methane loss at PSA and Selexol plant sites, possibly due to leaks and poor maintenance. Chemical systems have even lower guaranteed losses since the chemicals selectively react with the Co2 in the gas stream instead of adsorbing.
Energy Demands
For a biogas upgrading plant the auxiliary power required to drive the compressors, pumps etc is anywhere between 3-6% of the total energy output in the form of natural gas. The cost associated with upgrading biogas also decreases with larger plant size, a smallish plant of 100 metres cubed per hour will upgrade gas at more than twice the cost of a plant outputting 200 - 300 metres cubed per hour.
Conclusions
A Digestor is only the beginning of the process to convert biomass into useful high quality natural gas. A biogas purification system takes the raw biogas at around 60% methane from the digester and through a special process outputs 98% methane for ether use as fuel gas or supplied to the grid. The four main upgrading processes are water washing, pressure swing adsorption, polyglycol adsorption and chemical treatment. Water washing and PSA are the most predominantly used systems in the world today. Typical energy requirements for a biogas purification system are between 3-6% of the total methane output, with smaller plants cost more to run than larger ones. As digester systems become more common around the world and people begin to catch on to biogas as a renewable source of energy, no doubt we will see more of these systems become available and more innovative designs.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Keywords:
The problem is that this biogas produced is roughly 60% methane and 29% Co2 with trace elements of H2S, and is not up to the quality of 99% pure methane natural gas if the owner was planning on selling this gas or using it as fuel gas for machinery. The corrosive nature of H2S alone is enough to destroy the internals of expensive plant.
Auxiliary Input
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
The solution is the implementation of a biogas upgrading or purification system. Biogas upgrading is a series of processes where the gas is first cleaned from contaminants and then dried, so that what is left at the end of the process is 98%+ methane fuel gas. Manufacturers that produce biogas purification systems each have their own different processes and technology that they employ to produce the sales quality gas. A few of them are detailed below.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
No URL
Water Washing
This is the most common method of purifying biogas. Here raw biogas from the digester is compressed and fed into the scrubber vessel where passing water streams adsorb the gas contaminants leaving near pure methane. The gas is then dried by dessicant in the drier columns and exit the system as 98%+ pure natural gas.
Pressure Swing Adsorption
Otherwise known as PSA, this purification method separates the Co2, Nitrogen, Oxygen and Water from the raw biogas stream by adsorbing gases at high pressure and desorbing them at low pressure as waste. The PSA system usually consists of 4 different adsorption columns working in sequence; Adsorption, depressurizing, desorption and repressurizing.
The raw biogas is compressed and fed into the bottom of the adsorption column where it is purified. during this time the remaining columns regenerate, such that there is always 1 absorber column actively cleaning gas. PSA does not scrub hydrogen sulphide so this most be removed before it enters the compressor.
Polyglycol
Using polyglycol (Tradename Selexol)to purify biogas is similar to the water washing method with regeneration. Selexol can adsorb hydrogen sulphide, carbon dioxide and water. However the energy required to regenerate the solution after adsorbing H2S is high, so hydrogen sulphide is removed before the process.
Chemical Reaction
Raw biogas can be upgraded by various chemical reactions that remove the C02 and other contaminants from the gas stream. The chemicals such as Alkanolamines react at atmospheric pressure in an adsorption column with the Co2 and are regenerated afterwards with steam. The hydrogen sulphide must first be removed to avoid toxifying the chemicals.
Advantages and Disadvantages
Each plant type fulfills its purpose of supplying high quality natural gas for grid injection. However depending on the site location, various environmental and economic factors might make selecting a certain type of system a more sensible choice. For areas where water is an expensive resource a more appropriate choice would be a PSA or Selexol system which regenerate the adsorbent, however this has to be offset against the heat input required in regeneration.
Another important factor to consider is the methane loss associated with each design. The methane loss is measured using gas analyzers and flowmeters at the suction and discharge sides of the plant. Most plants are guaranteed by manufacturers to achieve a maximum 2% methane loss. Some recent studies however have measured between 8-10% methane loss at PSA and Selexol plant sites, possibly due to leaks and poor maintenance. Chemical systems have even lower guaranteed losses since the chemicals selectively react with the Co2 in the gas stream instead of adsorbing.
Energy Demands
For a biogas upgrading plant the auxiliary power required to drive the compressors, pumps etc is anywhere between 3-6% of the total energy output in the form of natural gas. The cost associated with upgrading biogas also decreases with larger plant size, a smallish plant of 100 metres cubed per hour will upgrade gas at more than twice the cost of a plant outputting 200 - 300 metres cubed per hour.
Conclusions
A Digestor is only the beginning of the process to convert biomass into useful high quality natural gas. A biogas purification system takes the raw biogas at around 60% methane from the digester and through a special process outputs 98% methane for ether use as fuel gas or supplied to the grid. The four main upgrading processes are water washing, pressure swing adsorption, polyglycol adsorption and chemical treatment. Water washing and PSA are the most predominantly used systems in the world today. Typical energy requirements for a biogas purification system are between 3-6% of the total methane output, with smaller plants cost more to run than larger ones. As digester systems become more common around the world and people begin to catch on to biogas as a renewable source of energy, no doubt we will see more of these systems become available and more innovative designs.
Biogas Upgrading Technology - Cleaning Raw Biogas Into Usable Natural Gas
Tags:
Introduction
Auxiliary Input
The Importance of Grammar and Verbal Tense in ESL Teaching
The teaching of grammar as part of ESL programs is important; while it is a debated subject, it has been demonstrated that "natural learners" of second languages do not become proficient in the language if they do not understand the basic structure as provided by grammar studies. Hinkel and Fotos (2002) note that individuals over a "critical period" of age 15 are at risk for this problem, as are individuals who acquire enough of the second language to be able to communicate even with grammar deficiencies, and many individuals who learn English as their second language do not receive the negative feedback that would let them know they are doing something wrong that they would receive in a structured situation (18).
The Importance of Grammar and Verbal Tense in ESL Teaching
No URL
The purpose of this paper is to provide a review of the literature to demonstrate the importance of thorough attention to verbal tense.
Literature Review
Plotnik discusses the effect of tense: every narrative has a base tense, one that moves the action of the communication forward. The use of the tense establishes the mood for the conversation or the story being told - past tense is traditionally the storyteller's medium, in which events have taken place and people have acted out their destinies. There is a finite basis to expired time. Present tense, on the other hand, promotes a feeling or mood of immediacy and the potential for change or flexibility (Plotnik, 2003).
According to Mc Carthy and Carter (2002), communication involves relational aspects and the desire to express oneself politely and indirectly (as opposed to bluntly), often manifests itself in tense forms that are part of the knowledge of correct grammatical construction. These include verbs in a progressive context such as want, like, have to and so forth. The range of tense helps individuals to create communication with relational, interpersonal meaning. The speaking strategy of tense creates a relationship between the speaker, the event and the listener that can either involve or detach the participants from the event and each other. Understanding and correctly using the past and present tense has the potential of significantly increasing not only effective communication of verbal and written messages, but also of correctly and proactively establishing relational aspects of events and situations that it is an important part of proactive grammar instruction.
Limitations in the development of the English past tense affix -ed have been well-documented in ESL students across a variety of language tasks, including spontaneous conversations, elicited productions, sentence completion, sentence recall, production of nonsense forms, writing samples, and grammaticality judgments. Specifically, "the morphophonological component of English tense marking represents the patterns children need to extract from the input in order to produce the various forms associated with past tense. Specifically, children have to learn to "add -ed " to regular verb stems and recognize the various alternative phonological processes involved in indicating the past tense of irregular verbs."
There is a semantic contrast between tenses under three headings, location in time, factuality and backshifting. The primary use of the past tense indicates a situation in which "actions, events, processes, relations, states of affairs or whatever a clause expresses" are dynamic (in which case they 'take place') or static in which case they 'obtain'...The past tense may be more directly indicated by an expression including time such as "yesterday", a definite time in which the topic of the sentence occurred. Use of the past tense remarks on something that has happened, but does not necessary indicate that the situation continues into the present.
Huddleston (1984) noted that past time is an inherently relational concept; the past tense inflection indicates that the time the situation or even took place is past in relationship to another time, usually at the time the sentence is said or written. The time of the situation in the present tense will normally be present or future, and may also be expressed in temporal terms (such as now, next week) or by a subordinate when clause such as 'when she gets here, I am going to talk to her', indicating future. One important use of the subordinate clause is restricted to cases when the future situation in which the predicted event will take place is assured - Huddleston uses the example "He is ill next week" as a nonsensical misuse of the present tense as opposed to the action verb in "We leave for Paris next week" (145). This example shows how incorrect usage of past and present tense can not only impair communication and understanding, but have the potential to affect the "face" of the speaker/writer in social and work settings as well.
Quirk, Greenbaum, Leech, & Svartik (1995) identified five major classes of alternations used in the making of English past participles.
The first class includes all regular verbs (e.g., cleaned, kicked, smashed) and a large set of irregular verbs, and is composed of those verbs whose past tense and past participle forms are identical (e.g., brought, built, caught, had, left, kept, said, taught, thought, told). The second class contains high frequency irregular verbs such as hit, cut, and put that remain unchanged across their present, past, or past participle forms. For a third class of irregular verbs, the past participle is generated via the affixation of -en to their past tense form. This class includes verbs like beaten, broken, spoken, stolen. For the fourth class of irregular verbs, the - en morpheme is affixed to the present tense form (e.g., blown, eaten, taken, thrown). A final class of irregular verbs uses participle forms that are distinct from both their present and past tense forms (e.g., been, drunk, gone, written, ridden).
Redmond (2003) notes that production of the English past participle requires command of four advanced grammatical contexts: the passive, the present perfect, the past perfect, and the past modal. From syntactic and semantic perspectives, each of usage is considered complex relative to simple active sentences because they require speakers to coordinate multiple relations between tense, voice, aspect, and mood within the verb phrase.
Ionin and Wexler's 2002 research amongst 20 child ESL learners found that they almost never produce incorrect tense/agreement morpohology. Also, the researchers noted, "the L2 learners use suppletive inflection at a significantly higher rate than affixal inflection, and overgenerate be auxiliary forms in utterances lacking progressive participles (e.g., they are help people).
A grammaticality judgment task of English tense/agreement morphology similarly shows that the child ESL learners are significantly more sensitive to the 'be paradigm' than to inflection on thematic verbs. These findings suggest that tense is present in the learners' grammar, and that it is instantiated through forms of the be auxiliary. It is argued that omission of inflection is due to problems with the realization of surface morphology ... it is furthermore suggested that second language learners initially associate morphological agreement with verb-raising and, thus, acquire forms of be before inflectional morphology on in situ thematic verbs (95).
Conclusion
The correct use of tense is an important skill for adult ESL individuals to have and the lesson plans developed to address this directly will help them communicate effectively with co-workers and people in the community as to what they want and need, what they have had and have done and also to establish their identity based on their past history and future wants.
It is important for ESL students to learn grammar so that they are able to express personal thoughts in the appropriate syntax. Effective use of syntax is important to show different attitudes and express power and identity. Some incorrect forms of grammar may even be interpreted by the listener/reader as being rude or impolite. The more precisely an individual can express their thoughts and meanings, the more effective their communication will be, and the more potential for success they will have in their interpersonal and business communications throughout their lives.
References
Hinkel E. and Fotos, S. (Eds.) (2002). New perspectives on grammar teaching in second language classrooms. Mahwah, N.J.: Lawrence Erbaum Associates.
Huddleston, R. (1984). Introduction to the grammar of English. New York: Cambridge University Press.
Ionin, T. and Wexler, K. (2002). Why is 'is' easier than '-s'?: acquisition of tense/agreement morphology by child second language learners of English. Second Language Research, 18(2): 95-136.
McCarthy, M. and Carter, R. (2002). Ten criteria for a spoken grammar. In: Hinkel E. and Fotos, S. (Eds.) New perspectives on grammar teaching in second language classrooms. Mahwah, N.J.: Lawrence Erbaum Associates.
Plotnik, A. (2003). Tense counts! Writer, 116(10): 17-18.
Quirk, R., Greenbaum, S., Leech, G., and Svartvik, J. (1995). A comprehensive grammar of the English language. New York: Longman.
Redmond, S.M. (2003). Children's productions of the affix -ed in past tense and past participle contexts. Journal of Speech, Language and Hearing Resources, 46(5): 1095-109.
This article brought to you courtesy of www.research-resource.com
The Importance of Grammar and Verbal Tense in ESL Teaching
Keywords:
Make sure all the connections are plugged in correctly.
Auxiliary Input
How to Reset an Xbox 360
Make sure the Xbox 360 Console has power.
How to Reset an Xbox 360
No URL
Make sure your TV or VCR is set to the correct Video Input. The Video Input name differs for different TVs or VCRs. For example, the input name may be Input Select, AUX, Line In, Line, In, Input, Source, or EXT. For more information, see the manual for the TV or for the VCR.
If the problem continues the try one of the following steps on How to Reset your Xbox 360.
If you get a picture without sound, follow these steps to reset your Xbox:
1. Make sure that you connect the video connectors and the audio connectors to the same input group on the back of the TV.
2. If you use digital audio, verify the following:
* Make sure that the audio receiver is turned on.
* Make sure that the audio output setting in the Xbox Dashboard corresponds to the setting on the TV.
* Make sure that you connect the console to the digital audio connector on the TV or audio receiver by using an S/PDIF optical connection or a "TosLink" cable.
If you get sound without a picture or bad picture, follow these steps to reset your Xbox:
1. Verify the following:
* Make sure that your TV is set to the same video broadcast system as your Xbox 360 console (PAL or NTSC). For example, if your Xbox 360 console is an NTSC console, make sure that your TV supports NTSC.
* If your Xbox 360 console is a PAL console, set your PAL settings to PAL 60.
* If your TV has a type of picture compensation enabled, disable it. Examples of picture compensation include the following:
Dynamic contrast
Automatic compensation
Contrast detection
Light detector
These features may have different names depending on the make and the model of your TV.
2. Turn off your Xbox 360 Console if its not already off.
3. Turn on your Xbox 360 Console.
*Note: If you are using an Xbox 360 Wireless Controller, turn on the console by using the Xbox Guide button on the controller. Wait for the guide light to indicate that the controller has linked to the console.
*Note: Make sure that you use the player one controller when you do this. The player one controller is indicated by the upper-left quadrant light on the console.
2. As the console starts up, hold the right trigger, and then press and hold the Y button as the console starts. If you see a picture on the display after you try this step, you can continue to use the 640x480 resolution, or you can try to use a higher resolution setting. If you still cannot see a picture, continue to the next steps.
3. Disconnect the VGA High Definition cable from the display, and then remove the console power cord from the power outlet.
4. Wait five seconds or so.
5. Reconnect the console power cord to the power outlet, and then turn on the console.
6. Reconnect the VGA High Definition cable to the display. If you can see a picture on the display after you try this step, you can continue to use the 640x480 resolution, or you can try to use a higher resolution setting.
How to Reset an Xbox 360
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Satellite Radio installation costs are broken down as follows:
Auxiliary Input
Satellite Radio: Installation Costs
Activation costs are the amount that both XM Satellite Radio and Sirius Satellite Radio charge to start service. Activation costs vary, where .00 with Sirius and .99 with XM will get you ready to go. Telephone activation is .00 with Sirius and .99 with XM. Monthly subscription costs then play into the cost, but these depend on some factors. Recent media campaigns are dramatically dropping the cost of installation and activation, both XM and Sirius are offering free activation in some instances. Further Detail at: http://www.TopSatelliteRadio.com
Satellite Radio: Installation Costs
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A typical cost of a car satellite radio installation can vary depending on whether you use a Satellite radio which is dedicated only to satellite radio reception or if it also can play CDs.
The typical costs are detailed below:
Receiver - 5
Radio 5-250
Antenna .00
Labor .00
Activation
---------------------
Total 0 - 0
Typical costs for a home satellite radio installation:
For this to work, you must choose to install a dedicated stereo receiver unit. Common AM/FM receivers are very similar to satellite radio receivers. Your auxiliary input is used to connect and a antenna is used to receiver the streaming content.
The typical costs are detailed below:
Receiver 0-0
Antenna .00
Activation
----------------
Total 0 - 0
Portable units are now being offered and can give you the ease of using your satellite radio anywhere you want! Each room in your house would require a home kit, which includes antennas, output cables, and power supplies. Home kits offer flexibility and ease of use as they can be plugged into your home stereo, computer, and boom boxes. Portable satellite radio installation costs are as follows:
The typical costs are detailed below:
Receiver 0
Home Kit 0
Boombox X 2 0
Activation
----------------
Total 0
Satellite Radio: Installation Costs
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