Heat transfer of a polytropic process for ideal gas n=0 Cp =KCy Energy balance (1st law): n=1 Cr→0 (ideal gas,n≠1) n=k -(区-0+-W n=士o0 n-K L-T) n-1 q=△u+w !No m,V→v (ideal gas,n=1) V2 =c,(T-T)+RT In Because“w' V instead of“W, g-Tn R 上游充通大 March 23,2018 6 SHANGHAI JIAO TONG UNIVERSITYMarch 23, 2018 6 Heat transfer of a polytropic process for ideal gas         2 1 2 1 2 1 2 1 1 1 1 1 v v R R n T T c T T n n R c T T T T n                       Energy balance (1st law): (ideal gas, n≠1) q u w    n c 0 p v n c c    1 T n c   0 s n k c   v n c   (ideal gas, n=1)     2 2 1 1 2 2 1 1 ln ln 1 v T T v c T T RT v R v RT  v        !! No m, V v Because “w” instead of “W