# The following data refer to an analysis of a dual combustion cycle with a gas having specific

## Question:

The following data refer to an analysis of a dual combustion cycle with a gas having specific heats varying linearly with temperature:

The pressure and temperature of the gas at the end of compression are 31 bar and $$227^{\circ} \mathrm{C}$$ respectively; the maximum pressure achieved during the cycle is $$62 \mathrm{bar}$$, while the maximum temperature achieved is $$1700^{\circ} \mathrm{C}$$. The temperature at the end of the expansion stroke is $$1240{ }^{\circ} \mathrm{C}$$. The increases in entropy during constant volume and constant pressure combustion are 0.882 and $$1.450 \mathrm{~kJ} / \mathrm{kg} \mathrm{K}$$ respectively. Assuming that the fluid behaves as an ideal gas of molecular weight, $$m_{w}=30.5$$ calculate the equations for the specific heats, and also the expansion ratio if that process is isentropic.

$$[0.6747+0.000829 T ; 0.94735+0.000829 T ; 7.814]$$

Fantastic news! We've Found the answer you've been seeking!