Unformatted text preview: rest to a reservoir at 300 K. If the thermal efficiency of the second heat engine is 20% less than the thermal efficiency of the first heat engine, determine the temperature T (K). SP24: Consider a Carnot cycle for water in a piston-cylinder device. The mass of the water is 1.5 kg. During the isothermal expansion the water is heated from a quality of 0.2 at a pressure of 25 bar to the saturated vapor state. The vapor then expands adiabatically to a pressure of 0.9 bar and a quality of 0.8. a) Sketch the P-v diagram for this cycle b) Evaluate the heat and work for each process (kJ) c) Evaluate the thermal efficiency...
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- Spring '08
- Heat, Heat engine, Thermal efficiency, special problems