平板式蒸发端热管植入墙体系统及其传热性能研究

Study on Flat-plate Evaporating End Heat Pipe Implanted in the Wall System and Its Heat Transfer Performance

结合墙体特性和热管的优点,设计了平板式蒸发端环路热管并植入建筑墙体,使结构热阻可以根据需求改变,以降低建筑能耗。通过理论分析和实验获得系统传热性能,并与传统墙体结构对比。结果显示,热管启动下,该系统的热阻为0.17K/W,约为传统墙体结构的1%。通过对结构内工质循环的启停控制,热管植入式墙体结构的性能可以在高效传热(热阻0.17K/W)和良好保温性能(热阻16.42K/W)之间切换。相比于传统墙体,热管植入式墙体系统可以有效降低室内负荷和提升热舒适。研究将为今后围护结构的被动式节能和太阳能利用提供新的思路和解决方案。

Combining the characteristics of the wall and the advantages of the heat pipe, a flat-plate evaporating end loop heat pipe was designed and implanted in the building wall. The thermal resistance can be changed according to the demand of reducing the building energy consum ption. The heat transfer performance of the system is obtained through theoretical analysis and experiments, and compared with the traditional wall structure. The results show that when the heat pipe is activated, the thermal resistance of the system is 0.17 K/W, which is about 1% of the traditional wall structure.Through the start and stop control of the working fluid cycle in the structure, the performance of the heat pipe implanted wall structure can be switched between efficient heat transfer(thermal resistance 0.17 K/W) and good insulation performance(thermal resistance 16.42 K/W). Compared with the traditional wall, the heat pipe implanted wall system can effectively reduce the indoor load and improve thermal comfort. This research may provide new ideas and solutions for the passive energy saving and solar energy utilization of the envelope structure in the future.