Abstract

This paper presents experimental study and analytical model for a passive two-phase thermosyphon loop designed to remove directly the hot air flow inside a data center. The cooling loop with separated lines working without electricity is tested under different conditions. A mini-channel parallel-flow evaporator and a finned-tubes condenser are used to transfer heat from the data center to outside environment. Experimental tests are conducted with different n-pentane fill ratios. According to these tests, the cooling performance is showed and the refrigerant distribution is specified. The proposed steady-state model is based on the combination of the thermal and hydraulic models of the two-phase flow inside the loop. It well predicts the experimental results such as the mass flow rate and working fluid pressure drops. As investigated by the model, the most parameters influencing the cooling capacity are: the working fluid, the condenser tubes number and the outside temperature.

中文翻译：

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冷却数据中心机架的热虹吸回路的实验研究和分析建模

摘要

本文介绍了一种无源两相热虹吸回路的实验研究和分析模型，该回路设计用于直接去除数据中心内部的热气流。在不同的条件下测试了带有分开的线路且无电的冷却回路。小通道平行流蒸发器和翅片管冷凝器用于将热量从数据中心传递到外部环境。用不同的正戊烷填充率进行实验测试。根据这些测试，显示了冷却性能并指定了制冷剂分布。所提出的稳态模型基于回路内部两相流的热力模型和水力模型的组合。它可以很好地预测质量流量和工作流体压降等实验结果。根据模型调查，