Exercise 2
Effect of excess air on AFT
Consider the fuel in 1. Now it is burnt with a) 20% excess air and b) 50% excess air. Calculate AFT in each case.
Solution:
In the following calculations we will be using
However, readers may perform calculation using
Take 20% excess air
Amount of POC:
| CO2 = 0.968 |
H2O = 1.92 |
O2 = 0.40 |
| N2 = 9.056 |
We can calculate
Heat of combustion 
Heat balance
Integration yields
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