water is the working fluid in a carnot vapor Water is the working fluid in a Car

Question

water is the working fluid in a carnot vapor

Water is the working fluid in a Carnot vapor power cycle. Saturated liquid enters the boiler and saturated vapor enters the turbine. The mass flow rate and enthalpy of the steam entering the turbine are 120 kg/s and 258006 kJ/kg respectively. The net power developed by the cycle is 55.12 MW with a thermal efficiency of 0.493. If the boiler feed water enthalpy is 1650.6 kJ/kg determine the rate of heat transfer from the energy source into the working fluid and the rate of heat transfer from the working fluid passing through the condenser.

Explanation / Answer

given efficiency = 0.493

net power output is 55.12 MW

efficieency = W/Qh => Qh = W/efficiency = 55.12/0.493 = 111.805 MW

so heat transferred to the working fluid =111.805 MW

heat transfer from working fluid = Qh-W =111.805 - 55.12 =56.685 MW

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