1kg 空气流经某正常工作的换热器,从某高温热源定压吸热,已知空气的 t 1 = 27 °C,吸热后 t 2 =627 °C,高温热源温度 727 °C,则空气的熵变为△ s= kJ/kg·K ;工质吸热过程的熵流 s f = kJ/kg·K ;熵产 s g = kJ/kg·K ;该吸热过程作功能力损失为 I = kJ/kg 。已知 c p =1.004kJ/kg·K , c v =0.717kJ/kg·K ,环境温度 t 0 = 20 °C
【简答题】Tom Williams arrives at Changdong Airport. He calls his friend, 1 . His friend is surprised by his 2 arrival. She is going to pick him up at the 3 . Then she is going to take him to the 4 , which is j...