In a reheat-regenerative Rankine cycle, the condenser pressure is 20 KPa. Steam enters the high pressure turbine at 5 MPa and 600 C. The isentropic efficiency of the pump is 87 % while the isentropic efficiency of the turbine is 91 %. Steam is reheated at 1 MPa and 400 C. For the regeneration, steam is extracted at 500 kPa for a closed feed water heater (CFWH) where the liquid exiting is throttled. Assume that the exits of the CFWH have the same
In a reheat-regenerative Rankine cycle, the condenser pressure is 20 KPa. Steam enters the high pressure turbine at 5 MPa and 600 C. The isentropic efficiency of the pump is 87 % while the isentropic efficiency of the turbine is 91 %. Steam is reheated at 1 MPa and 400 C. For the regeneration, steam is extracted at 500 kPa for a closed feed water heater (CFWH) where the liquid exiting is throttled. Assume that the exits of the CFWH have the same temperature. Draw the schematic and T-S diagrams. Label the points by setting point 1 after the condenser, point 2 after the 1st pump, point 3 after the CFWH (horizontal exit), point 4 after the boiler, point 5 before the reheater, point 6 after the reheater, point 7 for the extraction of steam for CFWH, point 8 before the condenser, point 9 after the CFWH (vertical exit) and point 10 after throttling. Label the mass extracted for the CFWH as m1. For the actual enthalpies (due to isentropic efficiencies), use labels such as h2', h5', h7' and h8'. Use two decimal places for the enthalpies and other energies. For entropy, use four decimal places. For the steam quality (x) and mass fraction, use six decimal places. The exam will be checked manually so in the first page of your solution, summarize your answers for the following (kJ/kg): h1 h2' h3 h4 h5' h6 h7' h8' h9 h10 Wt Wp Wnet Also, type the value that you have obtained for Wnet (kJ/kg) in the blank below. Wnet =
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