Consider a variation of the Carnot cycle in a closed system with 10 kg of pure water operating. ranging between temperatures of 130 C and 350 ◦C. State 1 is a saturated liquid. Process 1-2 is a isothermal expansion with a supply of QH = 10 MJ. Process 2-3 is an adiabatic expansion with isentropic efficiency from 0.75 to minimum temperature. Process 3-4 is a compression isothermal, and the 4-1 process is a reversible adiabatic compression. Calculate:
Consider a variation of the Carnot cycle in a closed system with 10 kg of pure water operating. ranging between temperatures of 130 C and 350 ◦C. State 1 is a saturated liquid. Process 1-2 is a isothermal expansion with a supply of QH = 10 MJ. Process 2-3 is an adiabatic expansion with isentropic efficiency from 0.75 to minimum temperature. Process 3-4 is a compression isothermal, and the 4-1 process is a reversible adiabatic compression.
Calculate:
a. The pressure p2, the bonds x4 and x3, and the specific entropies s1 and s3; b. The work in each expansion and compression process;
c. The heat rejected QL, the net work produced Wl i q and the yield η of the cycle;
d. The entropy generated Sg in the cycle
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