Controllable thermal rectification design for buildings based on phase change composites  

作　　者：Hengbin Ding Xiaoshi Li Tianhang Li Xiaoyong Zhao He Tian 

机构地区：[1]School of Integrated Circuits and Beijing National Research Center for Information Science and Technology(BNRist),Tsinghua University,Beijing 100084,China [2]Zhuhai Huafa Properties Co.,Ltd,Zhuhai 519030,China

出　　处：《Journal of Semiconductors》2024年第2期40-45,共6页半导体学报（英文版）

基　　金：This work was supported in part by Tsinghua University-Zhuhai Huafa Industrial Share Company Joint Institute for Architecture Optoelectronic Technologies(JIAOT KF202204);in part by STI 2030—Major Projects under Grant 2022ZD0209200;in part by National Natural Science Foundation of China under Grant 62374099,Grant 62022047;in part by Beijing Natural Science-Xiaomi Innovation Joint Fund under Grant L233009;in part by the Tsinghua-Toyota JointResearch Fund,in part by the Daikin-Tsinghua Union Program,in part sponsored by CIE-Tencent Robotics XRhino-Bird Focused Research Program.

摘　　要：Phase-change material(PCM)is widely used in thermal management due to their unique thermal behavior.However,related research in thermal rectifier is mainly focused on exploring the principles at the fundamental device level,which results in a gap to real applications.Here,we propose a controllable thermal rectification design towards building applications through the direct adhesion of composite thermal rectification material(TRM)based on PCM and reduced graphene oxide(rGO)aerogel to ordinary concrete walls(CWs).The design is evaluated in detail by combining experiments and finite element analysis.It is found that,TRM can regulate the temperature difference on both sides of the TRM/CWs system by thermal rectification.The difference in two directions reaches to 13.8 K at the heat flow of 80 W/m^(2).In addition,the larger the change of thermal conductivity before and after phase change of TRM is,the more effective it is for regulating temperature difference in two directions.The stated technology has a wide range of applications for the thermal energy control in buildings with specific temperature requirements.

关 键 词：phase change composites controllable thermal rectification building applications 

分 类 号：TB33[一般工业技术—材料科学与工程] TU83[建筑科学—供热、供燃气、通风及空调工程]