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er 7 problem 737 a simple pistoncylinder device contains helium...

Question: er 7 problem 737 a simple pistoncylinder device contains helium...

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er 7 Problem 7.37 A simple piston-cylinder device contains helium the device executes a four-process cycle with negligible changes in helium can be modeled as an ideal gas elium. The closed system formed by ch the helium kinetic and potential energy. Assume with room-temperature specific information is detailed in the table below: m in heats. The available process and state State 1 400 K 500 kPa 0.5 m ss 1.-2 Constant Pressure Compression State 2 Process 2-3 Expansion with pV constant State 3 Process 3.4 Constant Volume Heating 160 K 500 kPa0.2 m3 160 K 100 kPa 1.0 m9 State 252 K 168 kPa 1.0m Process 4-1 Adiabatic Compression (a) Calculate the work and the heat transfer for each process in the cycle. Clearly show your work. (b) Based on your analysis in Part (a) is the cycle a power cycle (heat engine) or a refrigerator? Clearly indicate your reasoning. (c) Based on your answer to Part performance, e.g. power cycle thermal efficiency or the refrigerator coefficient of (b), calculate the appropriate measure of performance.

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