Questions tagged [emissions]
9 questions
51
votes
2 answers
How was Volkswagen able to trick the lab pollution test?
The recent Volkswagen pollution test cheating scandal has shocked many people with its widespread extent as well as how it was hidden for so many years.
Last year, the International Council on Clean Transportation (ICCT) in
Washington DC…
March Ho
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5
votes
0 answers
Why did Volkswagen use special software ONLY during emissions testing?
As we all know, Volkswagen is in the middle of a scandal centered on its use of special software to lower tailpipe emissions during standard emission testing protocols.
What I don't understand is why this software needed to be switched off in other…
Gremlin
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5
votes
1 answer
How do I choose a blower design for an induced draft brick kiln?
I am responsible for a brick kiln in the Punjab province of Pakistan. My government requires all brick kilns to be upgraded to match recent new standards, which include the addition of a blower near the chimney. We consulted with local engineers who…
asim
- 153
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2
votes
1 answer
Converting between MMBTU and MWh
a quick question:
I want to convert between MMBTU and MWh to get at emission factors from energy.
I have the following information:
I use the data given in 40 CFR 98 (see EPA source here) by the EPA and gives me the Stationary Combustion Emission…
Moritz Schwarz
- 123
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2
votes
1 answer
Does rev hang in automobile engine depend on the engine load? What are the factors that affect rev hang in automobiles?
I know that rev hangs are intentionally introduced to modern vehicles that operate on electronic throttle bodies, by programming the ecu to close the throttle valve slowly (in gasoline engines) even when you let go off the accelerator pedal quickly…
Abhishek P G
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0
votes
0 answers
How much CO2 is produced by wood biomass under complete combustion?
If I have a one tonne (equivalent to 1.167 m3) of residual wood product used in a suspension burner at 3% moisture. The wood consists of a mixture of softwood by-products. How much CO2 would be produced under complete combustion?
Georgia Peach
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0
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3 answers
Measurement of actual carbon dioxide mass emitted from a diesel engine
I am looking for a solution to measure the actual total mass of carbon dioxide (CO2) emitted from a diesel engine used for power generation. Infrared CO2 sensors generally measure the gas concentration, describing the amount of gas by volume of the…
AEW
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0
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2 answers
How can I express parameters of a natural gas generator in terms of a diesel generator?
I am using the REOpt tool from the U.S. National Renewable Energy Lab to help in sizing a new battery energy storage system and solar PV array for an existing building. The building already has a natural gas-fueled generator, and the cost to operate…
LShaver
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-1
votes
1 answer
What is the real CO2 emission for cars? 1g/km or >100g/km?
If one searches for the different levels of CO2 emissions in cars, one can find two very different levels. For instance:
1: Here it is written that:
The law requires that the new cars registered in the EU do not emit more than an average of 130…
Physther
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