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The Basics of Combustion Analysis

What is combustion analysis?

Combustion analysis begins with the measurement of flue gas concentrations and gas temperature, and may include the measurement of draft pressure and soot level.

To measure gas concentration, a probe is inserted into the exhaust flue and a gas sample drawn out. Exhaust gas temperature is measured using a thermocouple positioned to measure the highest exhaust gas temperature. Soot is measured from a gas sample drawn off the exhaust flue. Draft is the differential pressure between the inside and outside of the exhaust flue.

Once these measurements are made, the data is interpreted using calculated combustion parameters such as combustion efficiency and excess air. A more in depth analysis will examine the concentration of the undesirable products described earlier.

Why do a combustion analysis?

A combustion analysis can help improve fuel efficiency, reduce emissions, and improve safety.

What all is measured?

Combustion analysis involves the measurement of gas concentrations, temperatures and pressure for boiler tune-ups, emissions checks and safety improvements. Parameters that are commonly examined include:

• Oxygen (O2)

• Carbon Monoxide (CO)

• Carbon Dioxide (CO2)

• Exhaust gas temperature

• Supplied combustion air temperature

• Draft

• Nitric Oxide (NO)

• Nitrogen Dioxide (NO2)

• Sulfur Dioxide (SO2)

We have measurements, now what?

Once flue gas and temperature measurements are made, combustion parameters are calculated to help evaluate the operating performance of the furnace or boiler. Typical combustion parameters include:

• Excess Air

• Carbon Dioxide

• Combustion Efficiency

• O2 Reference

• Emissions Conversions

What tool is used for combustion analysis measurements?

They are several types of measurement tools. At Deckard Mechanical we use the Testo 327-1 combustion efficiency analyzers. We do all the measurements and leave the customer with a printed report with all the measurements. We'll even explain it if there are any questions!

For additional information, check out:

http://www.tsi.com/uploadedFiles/Product_Information/Literature/Handbooks/CA-basic-2980175.pdf

#combustion analysis #efficiency