Energy relationship w/q of polytropic process 6 (ideal gas,n≠1) R W K-1 西) K-n q=- Expan.,Absorb;Compr.,Reject K-1 n<K >0 >0 W 膨胀，吸热；压缩，放热 K-n q K-1 n>K ≤0 w<0 膨胀，放热；压缩，吸热 K-n q Expan.,Reject;Compr.,Absorb 上游通大学 March 23,2018 7 SHANGHAI JIAO TONG UNIVERSITYMarch 23, 2018 7 Energy relationship w/q of polytropic process       1 2 1 2 2 1 1 1 1 1 v v R w T T c T T n n n q c T T n               0 0 1      q w n n    w 1 q n       0 0 1      q w n n    (ideal gas, n≠1) 膨胀,吸热; 压缩, 放热 Expan., Absorb; Compr., Reject 膨胀,放热; 压缩, 吸热 Expan.,Reject; Compr., Absorb