Measurement of actual CO2 mass emitted from a diesel engine

In summary: However, it does not take into account any other factors such as engine efficiency or incomplete combustion. Using a gas flow sensor would provide more accurate measurements of the actual CO2 emissions from the exhaust system. Other methods, such as using a hot wire anemometer, could also be used to calculate the MAF rate and then combine it with the CO2 concentration to obtain the desired answer. There are also other methods, such as using light beams and wavelength selective detectors, that have been used in the past to measure pollution levels and could potentially be used for this application. It may be helpful to consult with government agencies who have emission standards for vehicles to see how they measure emissions and gather more information on potential solutions.
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TL;DR Summary
Looking for a method to measure the total CO2 mass or rate of emission of CO2 from a diesel engine used in a power generation station.
I was wondering if there is a method to measure the actual total mass of carbon dioxide (CO2) emitted from a diesel engine used with a generator for power generation (https://www.cat.com/en_US/products/new/power-systems/electric-power/diesel-generator-sets/1000028914.html). Infrared CO2 sensors, such as ENMET EX-6165 sensor, generally measure the gas concentration in parts-per-million (ppm), describing the amount of gas by volume of the air at a certain time and location, which is not what I am looking for in this application. Liquid flow sensors are already installed in the diesel fuel supply and return lines to determine the amount of diesel consumed by the engine, and hence the amount of carbon burned and CO2 created, but I am looking to correlate these measurements with actual measurements of CO2 mass produced at the output of the exhaust system.

The question can be formulated as how to measure the CO2 emission rate from the engine exhaust system. A typical solution in practice would be to find a dedicated gas flow sensor and a monitoring system that accomplishes that.

Any idea on how to approach this problem would be greatly appreciated.

Thanks.
 
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  • #2
You can buy combustion gas analyzers but they give constituents not flow rates. But couldn't you just calculate it from fuel usage?
 
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Another round-about method:

Todays cars use an MAF (Mass Air Flow) Sensor to measure intake air.

The basic operation is the sensor is a Hot Wire Anemometer, which combined with intake air temperature, and cross sectional area of the input duct yields enough information to calculate the MAF rate.

Combining the above data with the CO2 concentration should yield your desired answer.

(I have not read any of these, but there are many results that look promising:
https://www.google.com/search?&q=how+measure+co2+emissions)

Cheers,
Tom
 
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  • #4
Tom.G said:
Another round-about method:

Todays cars use an MAF (Mass Air Flow) Sensor to measure intake air.

The basic operation is the sensor is a Hot Wire Anemometer, which combined with intake air temperature, and cross sectional area of the input duct yields enough information to calculate the MAF rate.

Combining the above data with the CO2 concentration should yield your desired answer.

(I have not read any of these, but there are many results that look promising:
https://www.google.com/search?&q=how+measure+co2+emissions)

Cheers,
Tom
Air consumption is not useful for calculating CO2 from a Diesel engine because it does not have a throttle. Air is always fully open and not related to fuel mass.
 
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  • #5
Several years ago the State of California published a Request For Proposal (RFP) for pollution measuring equipment to be placed at freeway on-ramps. As I recall, the approach was a light beam (probably multiple Lasers) across the ramp and a wavelength selective detector for a differential absorption measurement. That is the same approach as those fingertip Pulse-Oximeters that measure pulse rate and blood O2 saturation.

Edit: If you are in a country and/or state that has emission standards for vehicles, how about asking the government agency how they measure emissions. Here in the USA that information must be made public so the manufacturers can meet the standards.
 
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  • #6
I believe that calculating CO2 from fuel usage is very accurate.
 
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Related to Measurement of actual CO2 mass emitted from a diesel engine

What is the purpose of measuring actual CO2 mass emitted from a diesel engine?

The purpose of measuring actual CO2 mass emitted from a diesel engine is to accurately determine the amount of carbon dioxide being released into the atmosphere. This information is important for understanding the impact of diesel engines on air pollution and climate change.

How is the actual CO2 mass emitted from a diesel engine measured?

The actual CO2 mass emitted from a diesel engine is typically measured using a gas analyzer. This device collects and analyzes the exhaust gases from the engine to determine the concentration of CO2. The mass of CO2 emitted can then be calculated based on the volume of exhaust gas and the concentration of CO2.

Is there a standard method for measuring actual CO2 mass emitted from a diesel engine?

Yes, there are standardized methods for measuring actual CO2 mass emitted from a diesel engine. The most commonly used method is the ISO 8178 standard, which outlines procedures for measuring exhaust emissions from various types of engines, including diesel engines.

What factors can affect the accuracy of CO2 emissions measurements from a diesel engine?

There are several factors that can affect the accuracy of CO2 emissions measurements from a diesel engine, including the quality and calibration of the gas analyzer, the type and condition of the engine, and the operating conditions (such as load and speed) of the engine during the measurement.

How can the measurement of actual CO2 mass emitted from a diesel engine be used to improve engine performance?

By accurately measuring the CO2 emissions from a diesel engine, engineers and manufacturers can identify areas for improvement in engine design and operation. This can lead to the development of more efficient and environmentally-friendly diesel engines that produce lower levels of CO2 emissions.

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