Modeling and analysis of a dual-channel solar thermal storage wall system with phase change material in hot summer and cold winter area  

作　　者：Lijie Xu Chenglong Luo Jingyong Cai Jie Ji Leyang Dai Bendong Yu Shengjuan Huang 

机构地区：[1]School of Marine Engineering,Jimei University,Xiamen 361021,China [2]Institute of Energy Research,Jiangxi Academy of Sciences,Nanchang 330096,China [3]College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 200090,China [4]Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230027,China [5]College of Urban Construction,Nanjing Tech University,Nanjing 210009,China

出　　处：《Building Simulation》2022年第2期179-196,共18页建筑模拟（英文）

基　　金：supported by the National Natural Science Foundation of China(No.51878636,No.51908527);the Jiangxi Provincial Key Technology R&D Program,China(No.20202BBEL53033);the Key Research and Development Project of Anhui Province,China(201904a07020014);Young and Middle-aged Teacher Education Research Project 2020(Science and Technology);the Education Department of Fujian Province(No.JAT200284);Research Start-Up Fund of Jimei University(ZQ2020016).

摘　　要：A dual-channel solar thermal storage wall system with eutectic phase change material is studied.The full-day cooling load in summer and heating load in winter can be both decreased by this novel system.To investigate the airflow in the dual channel,mixed area assumptions based on the experimental results are summarized.Dynamic mathematical models of the system under four work modes are established and verified by the experimental results.The average RMSD(root mean square deviation)value is 0.35%in summer and 0.95% in winter.By analyzing the heat flux,the combination of dual channel and PCM is proven to decrease and delay cooling load both in the daytime and nighttime of summer.In winter's daytime,the thermal efficiency is promoted by the dual channel.And in winter’s nighttime,the system is able to heat the room constantly by the PCM boards.Based on parameter researches,the optimum phase change temperature range and the optimum thickness of the PCM are 26-30℃,1.5 cm in summer and 16-22℃,0.6 cm in winter respectively.To reach the optimum annual thermal performance,the coverage area is 2 m^(2) for this system.

关 键 词：DUAL-CHANNEL phase change material rational assumptions OVERHEATING passive heating 

分 类 号：TU111.4[建筑科学—建筑理论]