Question: 10. A Rankine cycle operates using water as the working fluid. It is proposed to operate between the pressures of 10 kPa and 2000

10. A Rankine cycle operates using water as the working fluid. It

10. A Rankine cycle operates using water as the working fluid. It is proposed to operate between the pressures of 10 kPa and 2000 kPa with a maximum temperature of 600C. An open feedwater heater is included such that the extraction pressure is 200 kPa. Do not neglect the work of the two pumps. Determine the thermal efficiency of the cycle. Sketch: Boiler Property Unit 1 Temp. Pressure Enthalpy Entropy Quality Q.F.H. L Condenser a. Find the enthalpies of states 1, 3, and 6. 2- 2 3 4 5 6 7 b. Find the quality of state 2, then the enthalpy of state 2. C. Use the equation for an isentropic pump to find the enthalpies of states 4 and 7. d. Use double interpolation. Create a steam table of values for 200kPa using linear interpolation, then use linear interpolation within this newly created table to determine the enthalpy at state 5. Determine QIN/6 e. f. Write a mass and energy rate balance equation for the feedwater heater to find the ratio of the mass flow rates, m4/m6 g. Find the thermal efficiency of the cycle, nt WHP+WLP-WP1-WF2 QIN me(h-hs)+m(hs-h)-me(h-ha)-ma(ha-h3) me(ho-h7)

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