Question:medium
Air (ideal gas) enters a perfect insulated compressor of a temperature of 310 K. The pressure ratio of compressor is 6, Specific heat at constant pressure for air 1005 J/kgK and ratio of specific heats at constant pressure and constant volume is 1.4. Assume that specific heat of air is constant. If the isentropic efficiency of the compressor is 85 percent, the difference in enthalpies of air between the exit and inlet of the compressor is _______
Air (ideal gas) enters a perfect insulated compressor of a temperature of 310 K. The pressure ratio of compressor is 6, Specific heat at constant pressure for air 1005 J/kgK and ratio of specific heats at constant pressure and constant volume is 1.4. Assume that specific heat of air is constant. If the isentropic efficiency of the compressor is 85 percent, the difference in enthalpies of air between the exit and inlet of the compressor is _______
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Compressor isentropic efficiency is always less than $100\%$, meaning the actual work input (and thus the actual enthalpy rise) is always greater than the ideal isentropic work.
Thus, $\Delta h_{\text{actual}} = \frac{\Delta h_s}{\eta_c}$.
Thus, $\Delta h_{\text{actual}} = \frac{\Delta h_s}{\eta_c}$.
Updated On: Jul 9, 2026
- 148.2 kJ/kg
- 245.2 kJ/kg
- 238.2 kJ/kg
- 198.3 kJ/kg
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The Correct Option is B
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