Continue Rankine Cycle Performance Trends Effect of condensing pressure on performance: T Lower condenser pressure increase work output at the same heat input >Increase in efficiency -Lower limit depends on environmental temperature P4<P4 Lowering pressure Increase in Wnet 4 decreases quality →Must increase T3to keep quality constant S 上游充通大 May9,2019 7 SHANGHAI JIAO TONG UNIVERSITYMay 9, 2019 7 Continue Rankine Cycle Performance Trends Effect of condensing pressure on performance: - Lower condenser pressure increase work output at the same heat input Increase in efficiency -Lower limit depends on environmental temperature - Lowering pressure decreases quality  Must increase T3 to keep quality constant