Question

Problem 3. Rankine Cycle (90 points) A steam power plant operates with high pressure of 4 MPa and has a boiler exit at 600°C receiving heat from a 700° C reservoir. The ambient air at 20°C provides cooling to maintain the water/vapor mixture in the condenser at 60°C. All components are ideal (i.e., reversible) except the turbine which has an efficiency 92% ofa reversible isentropic process. Other than the irreversibility of the turbine, the power plant can be considered as a Rankine cycle. Determine the following quantities in the suggested sequence: a) hs and ss of steam at boiler exit, b) hi at condenser exit, c) s4, x4 (quality of stream 4), h4 and reversible work done by a turbine assuming it is a reversible process, d) work done by the actual turbine assuming it is a reversible process, e) work done by the pump, h2 and qH, fD the specific entropy generation in the boiler-heat source -Write the entropy balance equation first.

Answer 1

12/. ぐー3174.85 00+23 15 4.1.087 hy oc 60 citie cm s).@t is neve기 Sille.. :st/vntvopic proceW s,呼 41087255 )5%C7-831 42D872. 0.1539 5+004) 55) Actul h 0-72

3674.85 3674.95-4.427 :o.72 1587.9 k sh 万 aaded in b tv bale 3474 35- 1532 3419.45 12.08 しp. 2.0R7A yspy @j bod ←