Figure P8.82 shows the schematic diagram of a cogeneration cycle. In the steam cycle, superheated vapor...
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Figure P8.82 shows the schematic diagram of a cogeneration cycle. In the steam cycle, superheated vapor enters the turbine with a mass flow rate of 5 kg/s at 40 bar, 440°C and expands isentropically to 1.5 bar. Half of the flow is extracted at 1.5 bar and used for industrial process heating. The rest of the steam passes through a heat exchanger, which serves as the boiler of the Refrigerant 134a cycle and the condenser of the steam cycle. The condensate leaves the heat exchanger as saturated liquid at 1 bar, where it is combined with the return flow from the process, at 60°C and 1 bar, before being pumped isentropically to the steam generator pressure. The Refrigerant 134a cycle is an ideal Rankine cycle with refrigerant entering the turbine at 16 bar, 100°C and saturated liquid leaving the condenser at 9 bar. Determine, in kW, (a) the rate of heat transfer to the working fluid passing through the steam generator of the steam cycle. (b) the net power output of the binary cycle. (c) the rate of heat transfer to the industrial process. Oin Steam generator Turbine 1.5 bar 2 To industrial Н.О суcle process H2O/R-134a heat exchanger W2 Turbine Refrigerant сycle -5 ut R-134a суcle Condenser Pump 3 Pump Wp Return flow from industrial process 1 bar, 60°C Wp2 Fig. P8.82 LO Figure P8.82 shows the schematic diagram of a cogeneration cycle. In the steam cycle, superheated vapor enters the turbine with a mass flow rate of 5 kg/s at 40 bar, 440°C and expands isentropically to 1.5 bar. Half of the flow is extracted at 1.5 bar and used for industrial process heating. The rest of the steam passes through a heat exchanger, which serves as the boiler of the Refrigerant 134a cycle and the condenser of the steam cycle. The condensate leaves the heat exchanger as saturated liquid at 1 bar, where it is combined with the return flow from the process, at 60°C and 1 bar, before being pumped isentropically to the steam generator pressure. The Refrigerant 134a cycle is an ideal Rankine cycle with refrigerant entering the turbine at 16 bar, 100°C and saturated liquid leaving the condenser at 9 bar. Determine, in kW, (a) the rate of heat transfer to the working fluid passing through the steam generator of the steam cycle. (b) the net power output of the binary cycle. (c) the rate of heat transfer to the industrial process. Oin Steam generator Turbine 1.5 bar 2 To industrial Н.О суcle process H2O/R-134a heat exchanger W2 Turbine Refrigerant сycle -5 ut R-134a суcle Condenser Pump 3 Pump Wp Return flow from industrial process 1 bar, 60°C Wp2 Fig. P8.82 LO
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SOLUTION Obtain the proporties from superheated water table for state 1 PI 40 bar a... View the full answer
Related Book For
Thermodynamics An Engineering Approach
ISBN: 978-0073398174
8th edition
Authors: Yunus A. Cengel, Michael A. Boles
Posted Date:
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