• 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 >An analytical and experimental study of heat pipe performance with a working fluid exhibiting strong concentration Marangoni effects
【24h】

An analytical and experimental study of heat pipe performance with a working fluid exhibiting strong concentration Marangoni effects

机译：具有强浓度马兰戈尼效应的工作流体对热管性能的分析和实验研究

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

An original performance study of an inclined gravity-assisted heat pipe with a 0.05 M 2-propanol/water binary mixture, exhibiting strong concentration Marangoni effects, was experimentally investigated. Initial experiments were carried out for varying liquid charge levels between 30% and 70%, to determine an optimal value that would enhance heat transport performance by maximizing the critical heat flux (CHF) condition, while reducing the evaporator wall superheat. A 45% liquid charge ratio was found to have the lowest overall superheat, and highest CHF condition attained, as high as 114.8 W/cm~2. Nucleate pool boiling contributions were found to have a greater impact on heat pipe thermal conductance, constituting 65% and 71% of the total heat transport for water and 0.05 M 2-propanol/water mixture respectively. Additionally, a 49% thermal conductance and 53% CHF improvement was found with 0.05 M 2-propanol/water as the working fluid over that of pure water. This investigation also introduces a novel binary mixture model for the inclined, gravity-assisted heat pipe. Modeling results of the system with a 45% fill ratio were found to provide good prediction of the experimental results with an average thermal conductance deviation of 0.5 W/K, and an evaporator-section pool boiling rms deviation of 14.3%. This model employs an average pseudo single-component (PSC) coefficient in place of an ideal heat transfer coefficient (HTC), and an empirically-determined binary mixture surface tension correlation, due to the non-ideal nature of the low concentration 2-propanol/water mixture.
机译：实验研究了倾斜的重力辅助热管与0.05 M 2-丙醇/水二元混合物的性能，表现出浓的马兰戈尼效应。最初的实验是在30％到70％之间改变液体装料量，以确定一个最佳值，该值将通过最大化临界热通量（CHF）条件，同时减少蒸发器壁过热来增强热传输性能。发现45％的液体装料率具有最低的整体过热度，并且达到的最高CHF条件高达114.8 W / cm〜2。发现核池沸腾的贡献对热管热传导的影响更大，分别占水和0.05 M 2-丙醇/水混合物总热传递的65％和71％。此外，与纯水相比，使用0.05 M 2-丙醇/水作为工作流体时，发现导热系数为49％，CHF改善为53％。这项研究还为倾斜的重力辅助热管引入了一种新型的二元混合物模型。已发现填充率为45％的系统的建模结果可提供对实验结果的良好预测，平均导热系数偏差为0.5 W / K，蒸发器段池沸腾rms偏差为14.3％。由于低浓度2-丙醇的非理想性质，该模型采用平均伪单组分（PSC）系数代替理想的热传递系数（HTC），并由经验确定的二元混合物表面张力相关性/水混合物。

著录项

  • 来源
  • 作者

    Kenneth M. Armijo; Van P. Carey;

  • 作者单位

    Department of Mechanical Engineering, University of California, 6123 Etcheverry Hall, Mai/stop 5177, Universitv of California at Berkeley, CA 94720-1740, USA;

    Department of Mechanical Engineering, University of California, 6123 Etcheverry Hall, Mai/stop 5177, Berkeley, CA 94720-1740, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Heat pipe; Pool boiling; Binary mixture; Marangoni effects;

    机译：热管;池沸腾;二元混合物马兰戈尼效应;

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