Air at 1 bar, 17°c, and a mass flow rate of 0.3 kg/s enters compressor operating at steady state and exits at 3 bar, 147°c. determine the power required by the compressor and the rate of exergy destruction, each in kw. ignore the effects of motion and gravity. let t, = 17°c, po = 1 bar.

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]