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 P4<P4 Lowering pressure Increase in Wnet decreases quality →Must increase T3to keep quality constant 上游充通大 Wednesday,May 03,2017 7 SHANGHAI JIAO TONG UNIVERSITYWednesday, May 03, 2017 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