Air at 300 k, 1 bar enters a compressor operating at steady state and is compressed adiabatically to 1.5 bar. the power input is 42 kj per kg of air flowing. employing the ideal gas model with k 1.4 for the air, determine for the compressor (a) the rate of entropy production, in kj/k per ignore kinetic and potential energy effects.

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0