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Heat given by a flame

by LorDjidane
Tags: flame, heat
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LorDjidane
#1
Jun2-05, 09:15 AM
P: 6
Hello

First of all, I'm french, as a consequence my scientific language might be difficult to understand. I'm sorry for this.

So, I'm studying a little Stirling motor.
I evaluated the Work given by its cycle. It functions with an external combustion, produced by the burning of Ethanol (C2H5O).

I want to calculate the Heat given by the flame provided by this combustion in order to calculate the output of my motor.

Does anyone have an idea ? I thought about the use of the Free Enthalpy of Combustion, but I don't understand how to use it.

Maybe I could use the expression :
Variation of enthalpy = C*variation of temperature ?

Thanks for your help =)
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GCT
#2
Jun2-05, 10:32 AM
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Are you referring to free energy? You might want to find the standard enthalpy of reaction instead. The data is quite easy to find.
LorDjidane
#3
Jun2-05, 10:56 AM
P: 6
That must be that (attached with the post).

But with that, how could I calculate the heat given by my flame ?
Attached Images
 

GCT
#4
Jun2-05, 11:04 AM
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Heat given by a flame

I think that enthalpy is a good approximation of the heat [itex] q [/itex] in most cases,
to be sure and perhaps obtain more professional advice you'll need to post this question in the engineering forum and be sure to mention "Sterling Motor."
LorDjidane
#5
Jun2-05, 11:18 AM
P: 6
Ok, thanks a lot for your help =)

I'll first try to get the plans of my motor to be more precise.


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