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周期性非稳态传热对低温容器的影响机理及尝试
时间: 2019-07-20

  2009年第4期 总第170期 低 温工 CRYOGENICS 程 No.4 Sum 2009 No.170 周期性非稳态传热对低温容器的影响机理及尝试 张红玉 (浙江海洋学院 竺振宇 浙江舟山 316000) 摘要:对低温容器别离正在温度下和有外热源前提下进行热响应尝试,发觉低温容器静态蒸 发率呈周期性变化,但变化周期仅为温度变化周期的1/2,温度的周期性变化并非是使高实 空多层绝热容器蒸发率丈量时发生周期变化的次要要素。正在进行外热源加热容器外壁尝试时发觉, 外壁温度变化并没有对低温容器的漏热量发生较着的影响,低温容器的绝热层对低温容器外壁面的 温度波动有较强的衰减及延迟感化,热量正在传入的过程中发生了猛烈的衰减,使容器内壁近似构成一 个“等温层”,从而使高实空多层绝热低温容器的漏热量几乎不受温度变化的影响。 环节词:周期性非稳态传热 中图分类号:TB61l 低温容器 温度波 衰减 延迟 文献标识码:A 文章编号:1000_6516(2009)04-0041-04 Mechanism and experiment for influence of periodic unsteady state heat conduction on cryogenic vessel Zhang Hongyu (Zhejiang Ocean University。Zhoushan Zhu zhenyu 316000,Zhejiang Province,China) Abstract:The evaporation exterior ic rate of a cryogenic vessel was measured in environment temperature and with rate heat source respectively.It was found that the evaporation was of cryogenic vessel presented period— change,but the change period only half of the periodic change of environment temperature,the peri— a od of environment temperature was not main factor of the periodic change of cryogenic vessel’s evaporation no rate.At same time,the temperature change of outside wall had cryogenic obvious influence on the heat leakage of vessel when outside wall was heated,severe attenuation happened in heat transfer process for the an insulation layer weaken and delayed the temperature fluctuation of outside wall,SO isothermal region not formed and the heat leakage quantity of high vacuum multi-layer insulation cryogenic vessel was by the ambient temperature change. affected Key words:periodic unsteady tion;detention state heat conduction;cryogenic vessel;temperature wave;attenua— 引 言 部的热量尽量少的漏入容器内部从而避免储存的低 温液体因蒸发而惹起的损耗。跟着低温液体正在国防、 科研以及工业上的使用日趋普遍,以液化气体的形态 低温容器的次要感化是用来储存低温液体,使外 收稿日期:2008—12—19;修订日期:2009-05—14 做者简介:张红玉,女,37岁,硕士、。 万方数据

  周期性非稳态传热对低温容器的影响机理及尝试_电子/电_工程科技_专业材料。对低温容器别离正在温度下和有外热源前提下进行热响应尝试,发觉低温容器静态蒸发率呈周期性变化,但变化周期仅为温度变化周期的1/2,温度的周期性变化并非是使高实空多层绝热容器蒸发率丈量时发生周期变化的次要要素.正在进行外热源加热容器外壁尝试时发觉,外壁温度变化并没有对低温



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