ps5_final

ps5_final - 16.050 Thermal Energy Problem Set #5 Fall 2002...

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16.050 Thermal Energy Problem Set #5– Fall 2002 Time spent on problems: Problem 1: Problem 2: Problem 3: Problem 4: Problem 5: Problem 6:
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16.050 Thermal Energy Problem Set #5 – Fall 2002 Do all problems. Please use a separate sheet of paper for each problem. 1. Air is to be compressed from atmospheric pressure at 290 K to 7 atm in a centrifugal compressor (isentropic efficiency about 0.70). The flow rate will be 3.75 kg/s. Specify the power requirement for the driving motor. You may assume the working fluid is a perfect gas with cp=1 kJ/kgK. 2. Air enters an adiabatic nozzle at 800 K and 140 kPa and emerges at 7 kPa. The isentropic efficiency of the nozzle is known to be 0.96. Determine the discharge velocity. Sketch the process on a T-s diagram and label the states. You may assume the working fluid is a perfect gas with cp=1 kJ/kgK. 3. An inventor has developed a method to run a Carnot cycle, as shown in the figure below, between two temperatures, T H and T L . The rate of heat removed from the high temperature source is Q ± H . The only drawback is that there is a small leak so
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ps5_final - 16.050 Thermal Energy Problem Set #5 Fall 2002...

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