Water at 2 kg/s is the working fluid in the power cycle shown below. Saturated l

Question

Water at 2 kg/s is the working fluid in the power cycle shown below. Saturated liquid at 10 kPa enters the pump, and other pressures are shown on the diagram.

(a) If the pump is adiabatic and reversible, what is the pump outlet temperature, T2?

(b) If the heat addition to the boiler is QH=6 MW, what is the boiler outlet temperature, T3?

(c) If the turbine is adiabatic and 90% efficient, how much power does it produce, WT?

(d) At what rate is exergy destroyed in the turbine?

(e) What is the overall efficiency of the entire cycle?

Answers:

(a) 46.29 C

(b) 376 C

(c)1732 kW

(d) 163 kW

(e) 28.8 %

Water at 2 kg/s is the working fluid in the power cycle shown below. Saturated liquid at 10 kPa enters the pump, and other pressures are shown on the diagram. If the pump is adiabatic and reversible, what is the pump outlet temperature, T2? If the heat addition to the boiler is QH=6 MW, what is the boiler outlet temperature, T3? If the turbine is adiabatic and 90% efficient, how much power does it produce, WT? At what rate is energy destroyed in the turbine? What is the overall efficiency of the entire cycle?

Explanation / Answer

Answers:

(a) 46.29 C

(b) 376 C

(c)1732 kW

(d) 163 kW

(e) 28.8 %

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