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首页> 外文期刊>Journal of enhanced heat transfer >HEAT TRANSFER ENHANCEMENT CHARACTERISTICS OF GRAVITY HEAT PIPE WITH SEGMENTED INTERNAL HELICAL MICROFIN
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HEAT TRANSFER ENHANCEMENT CHARACTERISTICS OF GRAVITY HEAT PIPE WITH SEGMENTED INTERNAL HELICAL MICROFIN

机译：传热增强具有分段内螺旋纤维素的重力热管的传热增强特性

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摘要

The heat transfer characteristics of gravity heat pipes (GHPs) with internal helical microfins (IHMs) were investigated experimentally, in comparison with smooth GHPs. The influence of different IHM arrangements on the GHPs was obtained. Four types of GHPs were designed and fabricated: GHPIHM1 (GHP with IHM arranged only in the condenser section); GHPIHM2 (GHP with IHM arranged in both the condenser and adiabatic sections); GHPIHM3 (GHP with IHM arranged in all inner surfaces); and GHP (smooth GHP). The results showed that applying IHMs on the inner surface enhances the performance of the GHP; typically, by lowering the operating temperature and thermal resistance. All of the GHPs with IHMs demonstrated lower working temperatures than the smooth GHP; in particular, GHPIHM2 and GHPIHM3 decreased the working temperature by 23 degrees C at 240 W. For most of the tested cases, the thermal resistance of GHPs with IHMs was reduced, as presented in ascending order: GHPIHM3 GHPIHM2 GHPIHM1 GHP. For the condensation heat transfer coefficient, all three GHPs with IHMs can be improved; for the evaporation heat transfer coefficient, GHPIHM1 became worse while GHPIHM2 and GHPIHM3 performed better.
机译：实验研究了与平滑的GHP相比，实验研究了与内螺旋微素（IHM）的重力热管（GHP）的传热特性。获得了不同IHM布置对GHPS的影响。设计和制造了四种类型的GHP：GHPIHM1（仅限IHM仅在冷凝器部分安排的GHP）; GHPIHM2（GHP，IHM，在冷凝器和绝热部分中排列）; GHPIHM3（带有IHM的GHP排列在所有内表面）;和GHP（SPONED GHP）。结果表明，在内表面上施加IHM增强了GHP的性能;通常，通过降低操作温度和热阻。所有的GHPS都与IHM的所有GHPS都表现出低于平滑GHP的工作温度较低;特别地，GHPIHM2和GHPIHM3在240W下将工作温度降低23℃。对于大多数测试病例，如升序所呈现的GHPS与IHMS的热阻降低：GHPIHM3＆ ghpihm2＆ ghpihm1＆ GHP。对于冷凝传热系数，可以提高所有具有IHM的GHP;对于蒸发传热系数，GHPIHM1变得更糟，而GHPIHM2和GHPIHM3更好。

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