assignment 5

assignment 5 - ThermalPhysicsPHYS253...

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Thermal Physics PHYS 253 Assignment 5, due 22 October (2010) in class 1) Fig 1 represents a simplified pV diagram of the Joule ideal gas cycle. All processes are quasi static, and C p is constant. Prove that the thermal efficiency of an engine performing this cycle is: ൌ1െ ቀ ሺఊିଵሻ ఊ 2) Fig 2 represents a simplified pV diagram of the Sargent ideal gas cycle. All processes are quasi static, and the heat capacities are constant. Prove that the thermodynamic efficiency an engine performing this cycle is: ൌ1െߛ ܶ െ ܶ ܶ െ ܶ 3) Fig 3 represents an imaginary ideal gas cycle. Assuming constant heat capacities, show that the thermal efficiency is: ൌ1െߛ ܸ ܸ ൗቁെ1 ሺ݌ ݌ ሻെ1 4) An imaginary ideal gas engine operates in a cycle, which forms a rectangle with sides parallel to the axis of the pV diagram. Call p 1 and p 2
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assignment 5 - ThermalPhysicsPHYS253...

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