The power used by the pumps, the power produced by the cycle, the rate of heat transfer in the reheater and the thermal efficiency of the system.
Explanation of Solution
Given:
Pressure of water at state 3
Pressure of water at state 1
Pressure of water at state 5
Temperature of water at the state 3
Mass flow rate of the water
Calculation:
Draw the
The entropies are constant for the process 3 to 4 and process 5 to 6.
Refer Table A-5, “Saturated water-Pressure table”, obtain the specific enthalpy and specific volume at state 1 corresponding to the pressure of
Calculate the work done by the pump during process 1-2
Calculate the specific enthalpy at state 2
Refer Table A-6, “Superheated water”, obtain the specific enthalpy and specific entropy at state 3 corresponding to the pressure of
Refer Table A-5, “Saturated water-Pressure table”, obtain the following properties corresponding to the pressure of
Calculate the quality of water at state 4
Calculate the specific enthalpy at state 4
Refer Table A-6, “Superheated water”, obtain the specific enthalpy and specific entropy at state 5 corresponding to the pressure of
Refer Table A-5, “Saturated water-Pressure table”, obtain the following properties corresponding to the pressure of
Calculate the quality of water at state 6
Calculate the specific enthalpy at state 6
Calculate the net power produced by the cycle
Thus, the net power produced by the cycle is
Calculate the rate of heat transfer in the reheater
Thus, the rate of heat transfer in the reheater is
Calculate the power used by the pumps
Thus, the power used by the pumps is
Calculate the thermal efficiency of the cycle
Thus, the thermal efficiency of the cycle is
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Chapter 9 Solutions
FUND. OF THERMAL-FLUID SCI (LL) W/ CONN
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