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首页> 外文期刊>International Journal of Heat and Mass Transfer >The effect of condenser temperature on the performance of the evaporator in a wickless heat pipe performance
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The effect of condenser temperature on the performance of the evaporator in a wickless heat pipe performance

机译：冷凝器温度对蒸发器在无芯热管性能下性能的影响

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摘要

The Constrained Vapor Bubble (CVB), a simple, wickless, heat pipe design that depends on interfacial forces to drive corner flow in a square cuvette, was studied in the microgravity environment aboard the International Space Station (ISS). In this paper, we consider the effects of different condenser temperatures on the heat transfer and fluid flow behavior using pentane as the working fluid. As the condenser temperature was decreased, the performance of the system decreased. This performance decrease using the pure working fluid was opposite to the behavior observed when using a mixture of 94 vol% pentane and 6 vol% isohexane. The mechanism for the decline in performance as the condenser temperature was lowered was a stronger than expected increase in the apparent strength of Marangoni flows at the heater end of the system. A simple mathematical model was fit to the experimental data and used to extract an evaporator heat transfer coefficient for experiments where we held the condenser temperature constant while increasing the heater power and where we held the heater power constant while decreasing the condenser temperature. All the results could be collapsed onto a single Nusselt number vs. Marangoni number curve. In this formulation, the Nusselt number was found to decrease with increasing Marangoni number to the 1/3 power.
机译：在国际空间站（ISS）的微匍匐环境中，研究了依赖于界面力的界面力，依赖界面力，这是一个简单，无芯，热管设计，这是在国际空间站（ISS）的微匍匐环境中进行界面力。在本文中，我们考虑使用戊烷作为工作流体的不同冷凝器温度对传热和流体流动的影响。随着冷凝器温度降低，系统的性能降低。使用纯工作流体的这种性能随着使用94体积％戊烷和6体积％异己烷的混合物而观察到的行为相反。随着冷凝器温度的性能下降的机制降低了Marangoni流动在系统的加热器端中的表观强度的预期升高。一个简单的数学模型适合实验数据，并用于提取蒸发器传热系数，用于实验，在那里我们在增加加热器功率的同时保持冷凝器温度恒定，以及我们在降低冷凝器温度的同时保持加热器功率恒定。所有结果都可以折叠到一个纽带数与Marangoni数字曲线上。在该制剂中，发现纽带数量随着Marangoni数增加到1/3功率而降低。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第9期|121484.1-121484.10|共10页
  • 作者

    Jiaheng Yu; Thao T.T. Nguyen; Anisha Pawar; Peter C. Wayner Jr.; Joel L. Plawsky; David F. Chao; Ronald J. Sicker;

  • 作者单位

    The Howard P. Isermann Department of Chemical and Biological Engineering Rensselaer Polytechnic Institute Troy NY 12180 USA;

    The Howard P. Isermann Department of Chemical and Biological Engineering Rensselaer Polytechnic Institute Troy NY 12180 USA;

    The Howard P. Isermann Department of Chemical and Biological Engineering Rensselaer Polytechnic Institute Troy NY 12180 USA;

    The Howard P. Isermann Department of Chemical and Biological Engineering Rensselaer Polytechnic Institute Troy NY 12180 USA;

    The Howard P. Isermann Department of Chemical and Biological Engineering Rensselaer Polytechnic Institute Troy NY 12180 USA;

    NASA Glenn Research Center Cleveland OH. 44135 USA;

    NASA Glenn Research Center Cleveland OH. 44135 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; Marangoni flow; Energy performance; Condenser temperature; Condensation; Capillarity;

    机译：热管;Marangoni流动;能源绩效;冷凝器温度;缩合;毛细血管;

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