A steam power plant operating on the intermediate steam Rankine cycle produces a net power of 160 MW. Water vapor enters the turbine at a pressure of 15 MPa and a temperature of 600 oC, and the condenser at a pressure of 15 kPa. The isentropic efficiency of the turbine is 85 percent and the isentropic efficiency of the pumps is 90 percent. In order to heat the feed water, some steam is separated from the turbine at a pressure of 0.6 MPa and sent to the open feedwater heater and exits the heater as a saturated liquid. Accordingly, fill in the blanks below. (Pump 1 inlet will be considered as saturated liquid.) a) The mass flow rate of the steam passing through the boiler is m5= ..... kg/s. b) The mass flow rate of the steam separated from the turbine to heat the feed water is m6= ...... kg/s. c) The heat entering the cycle is Qin = ...... kW.
A steam power plant operating on the intermediate steam Rankine cycle produces a net power of 160 MW. Water vapor enters the turbine at a pressure of 15 MPa and a temperature of 600 oC, and the condenser at a pressure of 15 kPa. The isentropic efficiency of the turbine is 85 percent and the isentropic efficiency of the pumps is 90 percent. In order to heat the feed water, some steam is separated from the turbine at a pressure of 0.6 MPa and sent to the open feedwater heater and exits the heater as a saturated liquid. Accordingly, fill in the blanks below. (Pump 1 inlet will be considered as saturated liquid.)
a) The mass flow rate of the steam passing through the boiler is m5= ..... kg/s.
b) The mass flow rate of the steam separated from the turbine to heat the feed water is m6= ...... kg/s.
c) The heat entering the cycle is Qin = ...... kW.
d) The heat released from the cycle is Qout = ...... kW.
e) The power produced in the turbine is WTurbine= ...... kW.
f) The power consumed in pump 1 is Wpump1= ...... kW.
g) The power consumed in pump 2 is Wpump2= ...... kW.
ğ) The value shown as y in the figure above has been found as y= .......
h) The mass flow rate of the steam passing through the condenser is m7= ...... kg/s.
i) The efficiency of the cycle was found to be .......
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