In an American literature class, the student s are assigned the task of carrying out a research to find out the current studies on William Faulkner’s “A Rose for Emily”, and writing a literature review on it. So what kind of research will it be?
【简答题】以氨为工质的制冷装置,氨进入某离心压缩机的状态为 p 1 = 0.1MPa , t 1 = -30 °C , 经压缩后出口压力 p 2 = 0. 5MPa , t 2 = 100 °C,则压缩机耗功为 kJ/kg ;(请保留 1 位小数)压气机绝热效率为 (请用两位小数);环境温度 20 °C, 作功能力损失为 kJ/kg 。(请保留 1 位小数) 制冷剂氨的热力学性质表 t / °C p /MP...