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Unformatted text preview: and SI units. Problem 4. Air at standard conditions enters a compressor at 75 m/s and leaves at an absolute pressure and temperature of 200 kPa and 345 K, respectively, and speed of 125 m/s. The flow rate is 1 kg/s. The cooling water around the compressor removes 18 kJ/kg of heat from the air going through the compressor. Determine the power required by the compressor. (Answer: 80 kW) Problem 5. Assume that the flow of air through a given duct is isentropic. At one point in the duct, the pressure and temperature are p 1 = 1800 lb/ft 2 and T 1 = 500 R, respectively. At a second point, the temperature is T 2 = 400 R. Calculate the pressure and density at this second point....
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- Spring '10