低温阀热锚位置优化及漏热分析

发布时间：2018-04-28 17:17

本文选题：低温阀 + 热锚　；参考：《低温工程》2017年01期

【摘要】：气动低温调节阀是大型氦低温系统中最重要的执行机构,工作在极低温状态下(液氢/液氦温区:20—4 K),低温漏热量是其最重要的技术参数之一。通过在低温阀外管焊接77 K热锚,可以有效降外管的漏热量损失。通过引入热力完善度,优化热锚在外管的相对位置,结果显示:热锚安装的最佳相对位置为0.40,此时外管在4 K温区相对漏热量损失减少了82.5%。
[Abstract]:Pneumatic cryogenic control valve is the most important actuator in large helium low temperature system. It works at very low temperature (liquid hydrogen / liquid helium temperature range: 20 ~ 4 KG). Low temperature heat leakage is one of its most important technical parameters. The loss of heat leakage can be effectively reduced by welding 77 K heat anchor in the outer tube of low temperature valve. The relative position of the outer pipe is optimized by introducing the thermal consummation degree. The results show that the optimum relative position of the hot anchor installation is 0.40, and the relative heat leakage loss of the outer pipe in the temperature range of 4 K is reduced by 82.5%.
【作者单位】：浙江大学制冷与低温研究所;
【基金】：国家自然科学基金项目(51406218) 浙江省博士后科研项目(BSH1502118)
【分类号】：TB657

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