A turbine with one extraction for regenerative feed water heating receives steam with
an enthalpy of 3373 kJ/kg and discharges it with an exhaust enthalpy of 2326 kJ/kg.
The ideal regenerative feed water heater receives 11,338 kg/h of extracted steam at
345kPa (whose h=2745kJ/kg). The feedwater (condensate from the condenser)
enters the heater with an enthalpy of 140kJ/kg and departs saturated at 345kPa
(hf=582kJ/kg). Calculate the turbine output in kW.
"\\dot{x} =11338 kg\/h=3.15kg\/s"
"\\dot{m} h_s=\\dot{x} h_s +(\\dot{m} -x)h_4"
"\\dot{m} *582=3.15*2745 +(\\dot{m} -3.15)140 \\implies \\dot{m}=18.565 kg\/s"
Turbine output "\\dot{m}(h_1-h_2)+(\\dot{m}-\\dot{x})(h_2-h_3)"
"18.565(3373-2745)+(18.565-3.15)(2745-2326)=18117.7 kW"
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