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A geothermal supply of hot water at 500 kPa 150aC is fed to an insulated flash evaporator at the rate of 15 kg so A stream of saturated liquid at 200 kPa is drained from the bottom of the flash

1.A geothermal supply of hot water at 500 kPa, 150aC, is fed to an insulated flash evaporator at the rate of 1.5 kg/so A stream of saturated liquid at 200 kPa is drained from the bottom of the flash evaporator, and a stream of saturated vapor at 200 kPa is drawn from the top and fed to a turbine. The turbine has an isentropic efficiency of70 percent and an exit pressure of 15 kPa. Evaluate the second law for this process for a control volume that includes the flash evaporator and turbine.

2. A geothermal supply of hot water at 80 Ibf/in2, 300 F, is fed to an insulated flash evaporator at the rate of 10000 Ibm/h. A stream of saturated liquid at 30Ibf/in.2 is drained from the bottom of the flash evaporator, and a stream of saturated vapor at 30 Ibf/in2 is drawn from the top and fed to a turbine. The turbine has an isentropic efficiency of 70 percent and an exit pressure of 2 Ibf/in.2 . Evaluate the second law for this process for a control volume that includes the flash evaporator and turbine.

 

Jun 07 2020 View more View Less

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