• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Mechanical-capillary-driven two-phase loop: Numerical modeling and experimental validation
【24h】

Mechanical-capillary-driven two-phase loop: Numerical modeling and experimental validation

机译：机械毛细管驱动的两相回路：数值建模和实验验证

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A mechanical-capillary-driven (Hybrid) Two-Phase Loop (HTPL) is a phase change cooling device that utilizes both mechanical (active) and capillary (passive) pumping. The HTPL consists of a mechanical pump, evaporator, condenser, and liquid reservoir which are connected through two separate loops for liquid and vapor flows. The hybrid (active/passive) pumping and scalable evaporator design of the HTPL make it possible to handle challenging thermal requirements such as high heat flux heat acquisition, large heat transfer area, reliable operation, long distance thermal transport with a small temperature difference. In this paper, the operational characteristics of the HTPL were numerically and experimentally investigated by varying heat inputs, flow rates of mechanical pump, and heat sink temperatures. A pressure relation between liquid and vapor phases in the evaporator was proposed to determine three distinctive boiling modes (flooded, partially flooded, and capillary) and heat transfer limits were discussed. The operating range of the capillary mode, which is a desirable boiling condition with low thermal resistances, is extended by reducing the pressure drop of the liquid supply in the evaporator and increasing a capillary pressure head in the evaporator wick. A reduction of heat sink temperature increases the system thermal resistance of the HTPL, especially in the vapor line which exists from the evaporator to the condenser. A capillary limit of the HTPL, by increasing pump flow rate, approaches a boiling limit which is estimated to be 259.8 W/cm2.
机译：机械毛细管驱动（混合）两相回路（HTPL）是一种利用机械（主动）和毛细管（被动）泵送的相变冷却装置。 HTPL由机械泵，蒸发器，冷凝器和储液器组成，它们通过两个独立的回路连接，以使液体和蒸气流动。 HTPL的混合（主动/被动）泵送和可扩展的蒸发器设计使其能够处理具有挑战性的热要求，例如高热通量热量获取，大的传热面积，可靠的操作，长距离传热且温差小。在本文中，通过改变热量输入，机械泵的流量和散热器温度，对HTPL的运行特性进行了数值和实验研究。提出了蒸发器中液相和气相之间的压力关系，以确定三种独特的沸腾模式（溢流，部分溢流和毛细管），并讨论了传热极限。通过减小蒸发器中液体供应的压降并增加蒸发器芯中的毛细管压力头，可以扩展毛细管模式的工作范围，这是理想的具有低热阻的沸腾条件。散热器温度的降低会增加HTPL的系统热阻，特别是在从蒸发器到冷凝器的蒸汽管线中。通过增加泵的流速，HTPL的毛细极限接近沸腾极限，估计为259.8 W / cm2。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号