Experimental and numerical study on a miniature Joule–Thomson cooler for steady-state characteristics
Experimental and numerical study on a miniature Joule–Thomson cooler for steady-state characteristics
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DOI：
10.1016/s0017-9310(01)00165-x
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发表时间：
2002
影响因子：
5.2
通讯作者：
K. Ng;H. Xue;J. Wang
中科院分区：
文献类型：
--
作者：
K. Ng;H. Xue;J. Wang
本文从理论和实验两个方面对带有回热换热器的微型焦耳-汤姆逊(Joule-Thomson，JT)制冷机在96K以下的稳态性能进行了研究，提出了两个独特的分析方法。首先，模拟采用分布式方法(与黑匣子相反)，并在同时求解控制微分方程组时动态更新工质的热物性。其次，考虑了换热器纵向的导热泄漏效应和环境的导热泄漏效应。用P和T的局域值表示的Ar的性质已被发现与从IUPAC的表格中获得的数据很好地比较。我们在JT冷却器上的实验表明，在大范围的Ar压力范围内，与预测的相对误差在±0.3%以内。
A miniature Joule–Thomson (JT) cooler with a recuperative heat exchanger is studied, both theoretically and experimentally, for its steady-state behaviors down to 96 K. Two unique aspects of analysis are presented in this paper. Firstly, the simulation employs a distributed approach (as opposed to a black-box) and it is performed with dynamic updating of the thermo-physical properties of the working fluid when the governing differential equations are solved simultaneously. Secondly, the conduction heat leak effects in the longitudinal direction of the exchanger are included along with those from the ambient. The properties of Argon, expressed as a function of the local values of P and T, have been found to compare well with data obtained from tables of IUPAC. Our experiments on the JT cooler indicate good agreement with the predictions to within a relative error of ±0.3% across a large span of Argon pressures.