part08 rankine cycle

8/3/2019 Part08 Rankine Cycle

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13/25

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(b)Figure 1: Closed feedwater heaters cascading backwards. From Figure 2-15, page 52, El-Wakil.


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16/25

Closed Feedwater Heater - Pumped Forward

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18/25

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Determine the thermal efficiency, the required steam flow rate, and the moisture at theturbine exhaust for a reheat/regenerative cycle which is to produce 200 MW a t the turbinecoupling if the turbine throttle conditions are 15.5 MPa and 540 C; reheat is at 8.0 MPaand 590 C; one closed feedwater heater is at 3.4 MPa; an open feedwater heater is at 170kPa; and the condenser pressure is 13 kPa.The adiabatic turbine and pump efficiencies are 85%. The terminal temperature differencein the closed feedwater heater is 3C and the drain for the closed feedwater heater is trappedto the open feedwater heater.

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19/25

Determine the thermal efficiency, the required steam flow rate, and the moisture at theturbine exhaust for a reheat/regenerative cycle which is to produce 200 MW at the turbinecoupling if the turbine throttle conditions are 15.5 MPa and 540 C; reheat is at 8.0 MPaand 590 C; one closed feedwater heater is at 3.4 MPa; an open feedwater heater is at 170kPa; and the condenser pressure is 13 kPa.The adiabatic turbine and pump efficiencies are 85%. The terminal temperature differencein the closed feedwater heater is 3 C and the drain for the closed feedwater heater is trappedto the open feeciwater heater.

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25/25

part08 rankine cycle

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