液体真空制冷的理论分析及实验验证  

Theoretical and Experimental Studies of Vacuum Cooling of Liquids

作　　者：戴剑侠[1] 左然[1] 

机构地区：[1]江苏大学能源与动力工程学院,镇江212013

出　　处：《真空科学与技术学报》2007年第6期549-552,共4页Chinese Journal of Vacuum Science and Technology

摘　　要：本文建立了真空制冷的数学模型,对绝热和有热交换情况下的真空制冷过程进行了理论分析,推导了两种情况下液体温度随时间的变化函数;讨论了影响液体温度变化的各种参数,其中系统压强ps、液体初始温度Tf 0、汽液交界面面积A和外界热源Q是影响液体温度变化的主要因素。在理论计算基础上,进行了实验验证,并对二者进行了分析比较。实验数据和理论计算结果非常吻合,理论计算能够很好地预测水温的变化趋势。A physical model was developed to theoretically study the vacuum cooling of liquids in both insulated and non-instated systems. And the time evolution of liquid temperature was derived. The influences of vacuum cooling conditions, including the pressure, the initial liquid temperature, the area of the interface, and the heat flux, on liquid temperature were evaluated. The simulated results agree fairly well with thee experiment. With this model, the variations in liquid temperature can be predicted during vacuum cooling of water.

关 键 词：真空制冷 理论分析 实验研究 液体温度 

分 类 号：TB71[一般工业技术—真空技术]