Combustion air
Combustion air
(OP)
I need to calculate the air flow (lb/hr) required for burning No#2 oil (Higher calorific value= 20,516 Btu/lb). Here 16.8 lb(allowing 25% excess air) of air is required for burning 1 lb oil. Any help is appreciated.
Thank you.
Thank you.





RE: Combustion air
RE: Combustion air
Do you mean that you wish to review the air figure used "here"?
RE: Combustion air
Here is an MS Excel spreadsheet that deals with combustion calculations for oil and coal type fuels.
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Thanks,
Gordan
http://members.aol.com/engware
RE: Combustion air
Is it logical to consider the heated air to give up all the heat to burn the fuel?
heat lost by steam = heat gained by air = heat lost by air= heat gained by fuel
ms(hi-ho)= mf*HCV and ma=16.8*mf
where, m is the lb/hr for steam,fuel & air.
Regards
RE: Combustion air
In theory the sensible heat of the air is added to that of the fuel to produce a certain flame temperature.
However, the pressure drop and the expansion of preheated air, vs cold air, could lead to upsets in burning speed and rate, subjects that should be discussed with the burner manufacturer.
RE: Combustion air
My suggestion is to plug in the numbers in the spreadsheet.
Thanks,
Gordan
http://members.aol.com/engware
RE: Combustion air
Here are a few plots for ideal and complete stoichiometric combustion of coal, oil and gas with standard air:
I do hope that the above plots will be useful to you.
Thanks,
Gordan
http://members.aol.com/engware
RE: Combustion air
I missed one plot.
Thanks,
Gordan
http://members.aol.com/engware
RE: Combustion air
Does anyone have idea about the range of power boiler efficiency?
Regards
RE: Combustion air
I glad to be of some help.
http://engware.i-dentity.com
RE: Combustion air
My last post sounds like broken English.
I have to admit that it is just being too fast on the trigger.
It was supposed to say:
"I am glad to be of some help ... "
In the future, I will try to take more time before releasing my post.
http://engware.i-dentity.com