基于温度突变模型的冷屏预冷时间计算  

Calculating pre-cooling time of a thermal shield using temperature jump model

作　　者：程磊[1] 欧阳峥嵘[1] 党安旺[1] 严定传[1] 李俊杰[1] 

机构地区：[1]中国科学院强磁场科学技术中心,合肥230031

出　　处：《低温工程》2009年第4期36-40,共5页Cryogenics

摘　　要：为了优化冷屏的预冷系统设计,引入了温度突变模型来分析冷屏的预冷问题。首先介绍了温度突变模型的基理,阐述了将冷屏简化成低温液体输运管的思想。然后对一个大型空间模拟环境试验舱的低温泵氦板预冷系统进行了研究,利用温度突变模型计算得到其理论预冷时间和实际测得的时间相吻合,证明了该模型是可行的。还提出为原始的温度突变模型添加一个修正系数的思想,以便让该模型更加适用于冷屏的预冷过程分析。A temperature jump model was introduced to optimize the design for a thermal shield precooling system. First, the theory of temperature jump model was explained and the idea simplifying a thermal shield to a cryogen transport pipe was introduced. Then a pre-cooling system for a helium board of a cryogenic pump was studied, which was a part of one big helium system of space simulator. The result verities that temperature jump model is useful for the calculation time by using the temperature which is nearly to the real time. Further more, an extra correction factor was added to original jump model model.

关 键 词：冷屏 温度突变模型 修正系数 预冷时间 

分 类 号：TB663[一般工业技术—制冷工程] TK12[动力工程及工程热物理—工程热物理]