Continue Two-stage Compression with Intercooling n-l n-1 n-1 n- nRT n Wc= 2 n Minimum occurs at: dwc=0 for fixed Tand P2 dpx n-1 n-l dwc=0= RT n-1 Px n 1+ -1 n P dpx n-1 n Pu p =0 上游充通大率 May15,2018 8 SHANGHAI BAO TONG LINIVERSITYMay 15, 2018 8 Continue Two ‐stage Compression with Intercooling n1 n1 n n 1x 12 C 1 x n1 n1 n n 1x 2 C 1 x C 11 2 x n 1 C 1 x x 1 nRT p nRT p w 11 n1 p n1 p nRT p p w 2 n1 p p dw Minimum occurs at: 0 for fixed T ,p , and p : dp dw nRT p n 1 0 dp n 1 n p                                                              n 1 1 1 n n 2 2 2 1x x 0 1 n1 p p p np p                           