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categoryهندسة ميكانيكية schoolبكالوريوس event_available2026-07-13

السؤال

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In a Rankine cycle steam leaves the boiler and enters the turbine at 4 MPa, 400°C. The condenser pressure is 10 kPa. a) Draw the schematic diagram for the cycle showing the main devices and the flow directions. b) Determine the specific work input to the pump c) Determine the specific heat consumed by the working fluid in the boiler d) Determine the specific work output from the turbine e) Determine the specific heat rejected by the working fluid in the condenser f) Draw a schematic T-s diagram for the cycle with respect to the saturation lines g) Determine the cycle thermal efficiency. h) The designer of this cycle claims to have realized the maximum attainable efficiency with his design. Verify this claim. i) What is the thermal efficiency of a practical cycle operating at the conditions presented in the question if the turbine and pump efficiencies are both 70%?

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