A new design for a simple steam power plant splits steam for an open feedwater heater...
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A new design for a simple steam power plant splits steam for an open feedwater heater (OFWH) before the turbine instead of after it (see figure below). Steam leaves the boiler at a temperature of 600 C and a pressure of 10 MPa. A portion of the steam is then split to an OFWH. The remaining steam is expanded through a turbine to a pressure of 10 kPa. The turbine has an adiabatic efficiency of 90%. After leaving the condenser as saturated liquid, the water is then pumped to OFWH. The OFWH loses 500 kJ/kg of heat to the surroundings and produces saturated liquid water which is used as feedwater for the boiler. For the steam power plant, a) Sketch the steam cycle on a T-s diagram, labeling each point. (2 points) b) Determine the fraction of steam split to the OFWH. (4 points) c) Determine the thermal efficiency. (4 points) d) Discuss the advantages and disadvantages of this plant compared to one that splits the steam after the turbine. Is this plant more or less efficient? Why? (2 points) Qin B у 1 500 KJ 'It اقه kgr 7 2 x y FWH 3 ку T 5 st Wout A new design for a simple steam power plant splits steam for an open feedwater heater (OFWH) before the turbine instead of after it (see figure below). Steam leaves the boiler at a temperature of 600 C and a pressure of 10 MPa. A portion of the steam is then split to an OFWH. The remaining steam is expanded through a turbine to a pressure of 10 kPa. The turbine has an adiabatic efficiency of 90%. After leaving the condenser as saturated liquid, the water is then pumped to OFWH. The OFWH loses 500 kJ/kg of heat to the surroundings and produces saturated liquid water which is used as feedwater for the boiler. For the steam power plant, a) Sketch the steam cycle on a T-s diagram, labeling each point. (2 points) b) Determine the fraction of steam split to the OFWH. (4 points) c) Determine the thermal efficiency. (4 points) d) Discuss the advantages and disadvantages of this plant compared to one that splits the steam after the turbine. Is this plant more or less efficient? Why? (2 points) Qin B у 1 500 KJ 'It اقه kgr 7 2 x y FWH 3 ку T 5 st Wout A new design for a simple steam power plant splits steam for an open feedwater heater (OFWH) before the turbine instead of after it (see figure below). Steam leaves the boiler at a temperature of 600 C and a pressure of 10 MPa. A portion of the steam is then split to an OFWH. The remaining steam is expanded through a turbine to a pressure of 10 kPa. The turbine has an adiabatic efficiency of 90%. After leaving the condenser as saturated liquid, the water is then pumped to OFWH. The OFWH loses 500 kJ/kg of heat to the surroundings and produces saturated liquid water which is used as feedwater for the boiler. For the steam power plant, a) Sketch the steam cycle on a T-s diagram, labeling each point. (2 points) b) Determine the fraction of steam split to the OFWH. (4 points) c) Determine the thermal efficiency. (4 points) d) Discuss the advantages and disadvantages of this plant compared to one that splits the steam after the turbine. Is this plant more or less efficient? Why? (2 points) Qin B у 1 500 KJ 'It اقه kgr 7 2 x y FWH 3 ку T 5 st Wout
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The question is about a steam power plant cycle with an open feedwater heater where steam is drawn from the turbine before it enters the condenser not after Lets address each part of the question step ... View the full answer
Related Book For
Thermodynamics for Engineers
ISBN: ?978-1133112860
1st edition
Authors: Kenneth A. Kroos, Merle C. Potter
Posted Date:
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