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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Experimental research on the heat performance of a flat copper-water loop heat pipe with different inventories
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Experimental research on the heat performance of a flat copper-water loop heat pipe with different inventories

机译：不同库存扁平铜水环热管热性能的实验研究

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The heat performance of a flat copper-water LHP, including the start-up property, operation capacity and evaporator thermal resistance, with three inventories (charging ratio ranged from 40 to 60%) was experimentally investigated. In order to observe the flow in the compensation chamber and the evaporating zone, a flat evaporator with a transparent cover (56 mm in diameter and 30 mm in total thickness) was manufactured. The porosity of the sintered copper wick was 47.26%, and the averaged pore radius was 22.65 mu m. Severe heat leak, namely bubbles attaching on the wick during the start-up and heat pipe effect during the operation at a high heat load of 120 W, was observed. In addition, intermittent backflow from the condenser, which resulted in strong temperature oscillations, was also shown at low heat loads. It was experimentally found that high inventory was an effective method to address heat leak in spite of strong temperature oscillations at low heat loads. The optimal inventory of the proposed LHP was 10.0 ml (charging ratio of 50%), it could start smoothly in no more than 250 s and operate steadily at least at a heat load of 120 W (heat flux of 16.97 W/cm(2)) with the allowable evaporator wall temperature of 90 degrees C. (C) 2017 Elsevier Inc. All rights reserved.
机译：实验研究了扁平铜水LHP的热性能，包括启动性，操作能力和蒸发器热阻，有三个库存（收费比率为40％至60％）。为了观察补偿室和蒸发区中的流动，制造了具有透明盖（直径为56mm的扁平蒸发器（总厚度为30mm）。烧结铜芯的孔隙率为47.26％，平均孔半径为22.65μm。观察到严重的热泄漏，即在120W的高热负荷期间在启动和热管效应期间安装在芯上的气泡。另外，从冷凝器中产生强温振荡的间歇回流也在低热负荷下显示。实验发现，尽管在低热量负荷下的温度振荡强大，但高库存尽管存在强烈的温度振荡，是一种有效的方法。所提出的LHP的最佳清单为10.0ml（充电比为50％），它可以在不超过250秒开始平滑，并且至少在120W的热负荷下稳定地操作（热通量为16.97W / cm（2 ））通过允许的蒸发器壁温度为90℃，2017年Elsevier Inc.保留所有权利。

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