A gas undergoes a thermodynamic cycle consisting of three processes:
Process 1Ă˘â‚¬â€ś2: compression with pVĂ‚Â constant, from p1Ă‚Â 1 bar, V1Ă‚Â 1.6 m3 to V2Ă‚Â 0.2 m3 , U2Ă‚Â U1 0
Process 2Ă˘â‚¬â€ś3: constant pressure to V3 V1
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Process 3Ă˘â‚¬â€ś1: constant volume, U1Ă‚Â U3Ă‚Â 3549 kJ
There are no significant changes in kinetic or potential energy. Determine the heat transfer and work for Process 2Ă˘â‚¬â€ś3, in kJ. Is this a power cycle or a refrigeration cycle?
A closed system undergoes a thermodynamic cycle consisting of the following processes:
Process 1Ă˘â‚¬â€ś2: adiabatic compression with pV1.4Ă‚Â constant from p1Ă‚Â 50 lbf/in.2 , V1Ă‚Â 3 ft3 to V2Ă‚Â 1 ft
Process 2Ă˘â‚¬â€ś3: constant volume
Process 3Ă˘â‚¬â€ś1: constant pressure, U1Ă‚Â U3 46.7 Btu
There are no significant changes in kinetic or potential energy.
(a) Sketch the cycle on a pĂ˘â‚¬â€śV diagram.
(b) Calculate the net work for the cycle, in Btu.
(c) Calculate the heat transfer for process 2Ă˘â‚¬â€ś3, in Btu.