 #1
Kamuna
 9
 1
 Homework Statement:

determine:
a) Electrical power output of the plant if mechanical efficiency & generator efficiency
are 88 % & 92 %, respectively.
b) Heat added in the steam generator if boiler efficiency is 85 %
c) Plant thermal efficiency
 Relevant Equations:
 Rankine cycle
Is this the right path in solving this problem? Am i finding the correct enthalpies? I am also having difficulty understanding so what I've understood is that in a rankine cycle P2=P3 but here P2 is given and P3 has a given variable which is T=25 C too so should I neglect P2=P3?
Heres my problem set and the attempt to solve it:
In a Rankine cycle power plant superheated steam enters the turbine at 18 MPa and 580 C. Steam expands through a single stage turbine and discharges at 6 kPa with stage efficiency of 82 %. The condensate leaves the condenser at 25 C and pumped to 18.5 MPa going to the steam generator. The pump efficiency is 77 %. For steam flow of 9,000 kg/hr, determine:
Heres my problem set and the attempt to solve it:
In a Rankine cycle power plant superheated steam enters the turbine at 18 MPa and 580 C. Steam expands through a single stage turbine and discharges at 6 kPa with stage efficiency of 82 %. The condensate leaves the condenser at 25 C and pumped to 18.5 MPa going to the steam generator. The pump efficiency is 77 %. For steam flow of 9,000 kg/hr, determine:
 Electrical power output of the plant if mechanical efficiency & generator efficiency
 are 88 % & 92 %, respectively.
 Heat added in the steam generator if boiler efficiency is 85 %
 Plant thermal efficiency
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