2 Literature review on gas turbine performance

Equation 27
Equation 28

From the fundamental thermodynamic relation for the entropy, equation 29 can be obtained;
Equation 29
From partial differentiation of the equation 29 (for constant pressure) the equation 30 can be obtained.
Equation 30
According to the above relation represents the slope of the isobar line in h-S diagram and this slope is proportional to the temperature .
Therefore, the slope increases with the temperature rise. Thus the equation 31 can be obtained.

Equation 31

Equation 32

Equation 33
Similarly, for the polytropic efficiency for the turbine,

Equation 34