Modeling Vapor Power Cycle Question:What is the upper limit of vapor power cycle performance? 国 Answer: 1→2：adiabatic,reversible compression 2→3：isothermal,reversible heat input T 3→4：adiabatic,reversible expansion QH-TAS23 4>1:isothermal,reversible heat rejection 2。 3 ● Wnet Note:Whet =Qu-QL Qu=[Tds=TnASz T. 14 QL=TAS14 QL =Tds TiASa 上游充通大 May4,2018 4 SHANGHAI JLAO TONG UNIVERSITYMay 4, 2018 4 Modeling Vapor Power Cycle Question: What is the upper limit of vapor power cycle performance? Answer: 12: adiabatic, reversible compression 23: isothermal, reversible heat input 34: adiabatic, reversible expansion 41: isothermal, reversible heat rejection net H L 3 H H 23 2 1 L L 41 4 Note : W Q Q Q Tds T S Q Tds T S           1 2 3 4 s T QH = TS23 QL = TS14 Wnet TH TL