Solutions_10_1

# Solutions_10_1 - Eng 2210 Thermodynamics Homework Set#10...

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Eng 2210 – Thermodynamics Homework Set #10 Solutions Problem 8.49: Problem Statement: Water is the working fluid in an ideal regenerative Rankine cycle with one closed feedwater heater. The condensate leaving the feed water heater is a saturated liquid, and the feedwater leaving the heater leaves at the same temperature as the condensate that exits the feedwater heater. Determine for the cycle: a. The rate of heat transfer to the working fluid passing through the steam generator, in kJ per kg of steam entering the first-stage turbine. b. The thermal efficiency. c. The rate of heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam entering the first-stage turbine. T 1 = 480 ˚C Given Information: P 1 = 10 MPa P 2 = 0.7 MPa P 3 = 6 kPa Engineering Model : Each component is a Control Volume at steady state. There is no loss in heat or pressure between components. All of the processes are internally reversible except for the throttling process between 7 and 8 where h 7 = h 8 . Kinetic and potential energy effects are negligible. Solution:

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