Thermal comfort in a building with Trombe wall integrated with phase change materials in hot summer and cold winter region without air conditioning  

作　　者：Jie Li Yuan Zhang Ziyang Zhu Jiangtian Zhu Jing Luo Fen Peng Xiaoqin Sun 

机构地区：[1]School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha,Hunan 410114,PR China

出　　处：《Energy and Built Environment》2024年第1期58-69,共12页能源与人工环境（英文）

基　　金：supported by the National Key Research and Devel-opment Program of China(2018YFE0111200);the National Natural Science Foundation of China(52078053,51608051);the Science and Technology Department of Hunan(2019JJ30027,2020GK4057);the Changsha City Fund for Distinguished and Innovative Young Scholars(kq2106036);the Hunan Provincial Science and Technology Depart-ment(2020WK2012,2021JJ40584);the Education Department of Hu-nan Province(19C0073);the Chenzhou Municipal Science and Tech-nology Bureau(2021SFQ01).

摘　　要：Trombe wall and phase change materials(PCMs)are two effective ways to regulate indoor thermal comfort.However,Trombe wall surfers from overheating in summer and PCMs suffer from low heat transfer rate caused by the limited thermal conductivity.To compensate the shortcomings of the two methods,this paper proposed a Trombe wall system integrated with PCMs.Based on a light-weight building envelope in Changsha,China,the thermal comfort of 10 kinds of Trombe wall systems with PCMs with a melting temperature of 18-28℃ were studied.Taking the integrated indoor discomfort duration(I_(D)),integrated indoor discomfort degree-hour(I_(DH)),indoor air temperature(T_(in)),PCM liquid fraction(γ)and heat flux across wall(q)as evaluation indexes,the indoor thermal comfort was assessed in hot summer and cold winter region.Results show that the Trombe wall helped PCMs complete the phase change process effectively.Trombe wall with PCM25 next to the wall inner surface possessed the lowest annual I_(D) and I_(DH),as 2877 h and 12,974℃·h,respectively.Compared with the values in a traditional building,the I_(D) and I_(DH) were reduced by 7.01% and 14.14%.In order to give full play to the heat storage and heat release of the Trombe wall with PCMs,PCMs with phase change temperature 7℃ lower than the peak ambient temperature in summer or 8℃ higher than the winter night temperature was recommended according to regional climate conditions.

关 键 词：Trombe wall Phase change materials Integrated indoor discomfort duration Integrated discomfort degree-hour Liquid fraction 

分 类 号：TB34[一般工业技术—材料科学与工程] TK11[动力工程及工程热物理—热能工程]