A reversible power cycle, shown in the p-v diagram below, receives heat
Q1 and Q2 from two different hot reservoirs at
temperatures T1 and T2, respectively.
Heat Q3 is discharged to a cold reservoir at temperature
T3. The process 1-2 is an adiabatic, reversible compression while the
processes 3-4 and 5-6 are adiabatic, reversible expansions.
Derive an equation for the efficiency of this power cycle in terms of the
temperature ratio T3/T1 and
T3/T2 and the ratio of heats
q = Q2/Q1.
For the equation derived under 1) consider the limits of q=0,
q = infinity and finally T1 = infinity