An aircraft engine operates on a simple ideal Brayton cycle with a pressure ratio of 10.Heat is added to the cycle at a rate of 500 kW; air passes through the engine at a rate of 1 kg/s; in the air at the beginning of the compression is at 70 kPa and 0 C. Determine the power produced by this engine and its thermal efficiency. You many use constant specific heats at room temperature

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.