Solution cont. 十 P3 14 bar Valve T3=28℃ 中S3 Entropy rate balance (Qcv=0) 家nion 0=ritrer(S3-S4)+Ovalve P4 3.5 bar 十 →S4 +h4 =a--(on9)30ns-029a6(2KN =9.94×10-4kW/K 上游充通大 April 26,2018 19 SHANGHAI JIAO TONG UNIVERSITYApril 26, 2018 19 Solution cont. Valve Entropy rate balance (Qcv=0) s3 +h4 s4