Modeling of Recuperative Heat Exchanger in a Joule-Thomson Cooler

K. Ng, JinBao Wang, H. Xue
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Abstract

To develop effective heat exchangers for miniature and micro Joule-Thomson (J-T) cooling system, the performance of a recuperative heat exchanger is analyzed and evaluated. The evaluation is based on a theoretical model of the Hampson-type counter-flow heat exchanger. The effect of the pressure and temperature-dependent properties and longitudinal heat conduction are considered. The results of the numerical simulation are validated with the corresponding experimental measurements. The performance of the heat exchanger on effectiveness, flow and various heat conduction losses as well as liquefied yield fraction are analyzed and discussed. The simulation model provides a useful tool for miniature J-T cooler design.
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焦耳-汤姆逊冷却器中回热式换热器的建模
为了开发适用于小型和微型焦耳-汤姆逊(J-T)冷却系统的高效换热器,对一种回热式换热器的性能进行了分析和评价。以汉普森式逆流换热器的理论模型为基础进行了评价。考虑了压力和温度相关性质以及纵向热传导的影响。数值模拟的结果与相应的实验测量结果相吻合。对换热器的效率、流量、各种导热损失以及液化产率等性能进行了分析和讨论。该仿真模型为小型J-T冷却器的设计提供了有用的工具。
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