Experimental Study on a Facade-Built-in Two-Phase Thermosyphon Loop for Passive Thermo-Activated Building System

  • Li Zhu
  • Yang Yang
  • Jiqiang Zhang
  • Sarula Chen
  • Yong SunEmail author
Conference paper
Part of the Environmental Science and Engineering book series (ESE)


A novel facade-built-in thermosyphon loop (TPTL) for passive thermo-activated building system was proposed in this paper. The feasibility and effect of the filling ratio as well as the heat source temperature on the operation performance were investigated through the experimental method. Results show that the filling ratio has a great impact on the performance of the facade-built-in TPTL. There exists an optimal filling ratio to achieve a better heat transfer performance under different operation temperatures. The filling ratio of 88% is found to be the optimum filling ratio for the prototype based on the performance indicator of the total heat transfer resistance. Under the optimum ratio condition, the heat transfer rate of the facade-built-in TPTL could reach up to about 132–300 W when heat source temperature maintains at 35–55 °C.


Operation performance Two-phase thermosyphon loop (TPTL) Filling ratio Heat source temperature Passive and low energy building 



The project is supported by China National Key R&D Program (Grant No. 2018YFC0704400).


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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.School of ArchitectureTianjin UniversityTianjinChina

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