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首页> 外文期刊>Aerospace science and technology >Analytical study of multiple evaporator heat pipe with nanofluid; A smart material for satellite equipment cooling application
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Analytical study of multiple evaporator heat pipe with nanofluid; A smart material for satellite equipment cooling application

机译：纳米流体多蒸发器热管的分析研究；卫星设备冷却应用的智能材料

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Thermal management of satellite equipment is one of the most significant issues in the space industries. Heat generated by electrical component should be dissipated to avoid damaging the satellite. Heat pipe with discrete heat sources is often used to remove heat flux from satellite heat dissipating equipment. In this work, a two-dimensional analysis is used to evaluate the thermal performance of a cylindrical heat pipe with multiple heat sources (evaporators) using nanofluid. Pure water and Al2O3-water mixture are used as working fluids. The effect of particle concentration level 0 (distilled water), 2, 4, and 8%) and head load (Q = 30, 60, and 90 W) on the wall temperature, pressure drop, velocity field, thermal resistance, thermal-hydraulic performance, and heat pipe size is investigated. A remarkable decrease in wall temperature is observed, especially on the heat sources. It is found that heat transfer coefficient increases as particle concentration increases while an existence of an optimal particle concentration level for the lowest pressure drop and thus best thermal-hydraulic performance is established. There is a significant reduction in the thermal resistance and size of heat pipe when nanofluid is used. Results also show that applying nanofluid for the higher heat loads, in which more heat removal is required, has a more pronounced effect on the heat transfer rate augmentation and temperature reduction of satellite equipment. This useful feature of Al2O3-water proved its potential as a smart material in satellite equipment cooling application. (C) 2016 Elsevier Masson SAS. All rights reserved.
机译：卫星设备的热管理是航天工业中最重要的问题之一。电子元件产生的热量应散掉，以免损坏卫星。具有离散热源的热管通常用于去除卫星散热设备的热通量。在这项工作中，使用二维分析来评估使用纳米流体的具有多个热源（蒸发器）的圆柱形热管的热性能。纯水和Al2O3-水的混合物用作工作流体。颗粒物浓度水平0（蒸馏水），2、4和8％）和压头载荷（Q = 30、60和90 W）对壁温，压降，速度场，热阻，热力的影响液压性能和热管尺寸进行了研究。观察到壁温明显下降，尤其是在热源上。已经发现，随着颗粒浓度的增加，传热系数增加，而对于最低的压降存在最佳的颗粒浓度水平，因此建立了最佳的热工性能。当使用纳米流体时，热管的热阻和尺寸会大大降低。结果还表明，将纳米流体应用于更高的热负荷（其中需要更多的除热）对卫星设备的传热速率提高和温度降低具有更明显的影响。 Al2O3-水的这一有用功能证明了其在卫星设备冷却应用中作为智能材料的潜力。 （C）2016 Elsevier Masson SAS。版权所有。

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