Fuel Oil/Fuel Gas Burn Temperatures ```Name: jeff d gilbertson Status: N/A Age: N/A Location: N/A Country: N/A Date: Around 1993 ``` Question: We have two different types of burners on our boilers. Natural gas and fuel oil. Our information indicates that the natural gas flame burns at about 3000 degrees. We have no information about the fuel oil temperature. The natural gas has a btu content of 1027 btu/cf. The fuel oil has a btu content of 18,100 btu/lb. Could you tell me at what temperature the oil fire would burn? In case it is necessary, we use Babcock & Wilcox return flow oil burner and ring type gas burners. Their capacities are 5,660 lbs/hr oil and 1,600 cfm gas. Replies: This is a complicated question and can probably best be answered by measure- ment. You can calculate the adiabatic flame temperature for any fuel air oxidation reaction (fancy terminology for combustion). Adiabatic means without heat transfer (losses). Therefore, if you had a perfectly insulated chamber and you had a combustion process occurring and you measured the flame temperature, you would be measuring the adiabatic flame temperature. However, in real burner applications, there is always heat transfer and this is the complicating factor. Either you estimate the heat transfer loss and include it on the balance of energy equation that is used to find the flame temperature or you measure the flame temperature. Looking in one of my references, I see that I cannot readily find a value for the adiabatic flame temperature of fuel oil. However, I would say that your 3000 degrees F is probably a good estimate (+ or - 100 F). david r munoz Click here to return to the Engineering Archives

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