(Answered) A joule cycle consists of two adiabats and two isobars

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A Joule cycle consists of two adiabats and two isobars: 1--> 2 and 3 ---> 4 are adiabatic compression and expansion respectively; 2 ---> 3 and 4 ---> 1 are constant pressure expansion and compression respectively. Treat the working medium as an ideal gas with constant gamma = Cp/Cv. Note that all temperatures T1,T2,T3 and T4 and the volumes V1,V2,V3 and V4 are different.

a) Draw a P-V diagram illustrating the Joule Cycle.

b) What is the heat absorbed Q during the process 2 ---> 3?

c) Calculate the work done of a Joule cycle.

d) Compute the efficiency of this cycle in terms of gamma and pressure ratio P1/P2, where P1 is the pressure at state 1 and P2 is the pressure at state 2.

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