毫米级微管径热管的试验与模拟研究

Experimental and Simulation Study of Millimeter Micro Diameter Heat Pipe

热管置入式墙体技术是一种新型被动式太阳能利用技术,该技术利用重力热管的传热特性,实现了室内外热量的传输.此技术中内置于墙体的微管径热管的传热能力起着至关重要的作用.为了使微管径热管能最大化利用太阳能,本文采用可视化实验与数值模拟相结合的方法,对其进行了研究.结果表明:蒸发段和冷凝段均相通的毫米级微管径并联集束热管具有良好的均温性;热管充液高度在100～250 mm之间时传热性能最优;在WIHP所涉及的几何尺寸范围内,8 mm管径热管的综合传热性能比较理想.

The technology of the wall implanted with heat pipes is a new passive solar energy utilization technology, which realizes the transmission of indoor and outdoor heat by using the heat transfer characteristics of gravity heat pipe. In this technology, the heat transfer capability of the micro diameter heat pipe plays a crucial role. In order to maximize the use of solar energy for micro diameter heat pipes, the combination of visual experiment and numerical simulation is applied to study it in the paper. The results show that the evaporation section and the condensation section that are communicated to the millimeter size parallel micro diameter heat pipe have good temperature uniformity. Heat transfer performance of heat pipe is best between 100~250 mm. The comprehensive heat transfer performance of 8 mm diameter heat pipe is ideal in the range of geometric size involved in WIHP.