工质及充液率对L形平板重力热管传热性能影响的实验研究  

Experimental Study on the Effects of Working Medium and Liquid Filling Ratio on the Heat Transfer Performance of the L-Shape Flat Gravity Heat Pipe

作　　者：寇方铖 王馨[1] 邹瑜[2] 莫金汉[1] KOU Fang-cheng;WANG Xin;ZOU Yu;MO Jin-han(Department of Building Science,School of Architecture,Tsinghua University,Beijing 100084,China;Institute of Building Energy and Efficiency,China Academy of Building Research,Beijing 100013,China)

机构地区：[1]清华大学建筑学院建筑技术科学系,北京100084 [2]中国建筑科学研究院建筑环境与能源研究院,北京100013

出　　处：《建筑节能（中英文）》2022年第9期23-28,共6页Building Energy Efficiency

基　　金：国家重点研发计划资助项目(2017YFC0702601)。

摘　　要：平板重力热管应用于太阳房建筑围护结构中可有效提升太阳得热,实现零碳采暖,其传热性能对热管太阳房热性能有重要影响。搭建了“L形”平板重力热管传热性能实验台,实验研究了不同工质(丙酮、R141b)及充液率对其传热性能(温度波动性、启动时间、当量导热系数)的影响。实验结果表明:(1)充液率过高会导致热管温度波动较大,且R141b热管温度波动性比丙酮热管小;(2)工质充液率越低,热管启动时间越短,且R141b热管启动时间比丙酮热管短;(3)对于丙酮和R141b热管,工质充液率为10%时当量导热系数大,且丙酮热管的当量导热系数更大。给出了适用于热管太阳房的最优热管工质充液率组合,对热管太阳房实际应用效果的提升和优化具有指导意义。The application of the flat gravity heat pipe in the building envelope of solar house can effectively improve solar heat gain and realize zero-carbon heating, and its heat transfer performance has a great influence on the thermal performance of the heat pipe solar house. A test system for the heat transfer performance of the L-shape flat gravity heat pipe was set up, and the effects of working medium(acetone/R141 b) and liquid filling ratio on its heat transfer performance(temperature fluctuation, start-up time and equivalent thermal conductivity) was experimentally studied. The experiment results show that:(1) High liquid filling ratio leads to large temperature fluctuation of the heat pipe, and the temperature fluctuation of R141 b heat pipe is smaller than that of acetone heat pipe;(2) The start-up time of the heat pipe is shortened with the decrease of liquid filling ratio, and the start-up time of R141 b heat pipe is shorter than that of acetone heat pipe;(3) For acetone and R141 b heat pipes, the equivalent thermal conductivity is large when the liquid filling ratio is 10%, and the equivalent thermal conductivity of the heat pipe with acetone is higher. This paper gives the optimal combination of working medium and liquid filling rate of heat pipe for the heat pipe solar house, which is of guiding significance to the improvement of practical application of the heat pipe solar house.

关 键 词：重力热管 平板热管 启动时间 当量导热系数 

分 类 号：TU111[建筑科学—建筑理论]