Thermal performances and invisible thermal barrier formation mechanism of arc-shaped metal-fin-enhanced thermally activated building envelopes with directional heat charging feature

作     者：Yang Yang Sarula Chen Jiqiang Zhang Zhenya Zhang Shuying Li Kunyu Chen Xiuyi Xiao Yang Yang;Sarula Chen;Jiqiang Zhang;Zhenya Zhang;Shuying Li;Kunyu Chen;Xiuyi Xiao

作者机构：College of Architecture and ArtHefei University of TechnologyHefei230601China Anhui Province Key Laboratory of Intelligent Building&Building Energy SavingAnhui Jianzhu UniversityHefei230601China School of Architecture and Urban PlanningAnhui Jianzhu UniversityHefei230601China College of City ConstructionJiangxi Normal UniversityNanchang330022China 

出 版 物：《Building Simulation》 (建筑模拟（英文）)

年 卷 期：2024年第17卷第9期

页      面：1461-1489页

核心收录：

学科分类：1002[医学-临床医学] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 10[医学] 

基　　金：co-sponsored by the National Natural Science Foundation of China(No.52208103) Fundamental Research Funds for the Central Universities(No.JZ2024HGTB0229) Opening Fund of Anhui Province Key Laboratory of Intelligent Building&Building Energy Saving(No.IBES2024KF05,IBES2024ZR03) Anhui Province University Outstanding Scientific Research and Innovation Team(No.2022AH010021) Scientific Research and Cultivation Project of Anhui Jianzhu University(No.2021XMK04) 

主　　题：thermo-activated building envelope thermal barrier formation performance enhancement arc-shaped metal fins fin parameters CFD model 

摘      要：Thermally activated building envelopes(TABEs)are multifunctional component that combines structural and energy *** on re-examining the heat charging processes,an arc-shaped metal-fin-enhanced TABE(Arc-finTABE)with directional heat charging features is proposed to optimize the thermal barrier formation process.A comprehensive parameterized analysis is conducted based on a validated mathematical model to explore the influence of 5 fin-structure design parameters and the static insulation *** verified that the directional charging strengthening fins can improve transient thermal performances of Arc-finATBE and enlarge horizontal and vertical sizes of the thermal energy accumulation area surrounding the pipeline,while the maximum growth in extra heat loss is less than 3.17%.From the perspective of promoting heat injection into expected areas,the straight main fin configurations with the angle of main fins of 30°,shank length ratio of 0.4 and no leftward mounted fins are preferred in load-reduction mode,while the angle of main fins of 150°,shank length ratio of 0.8 and multiple fin designs,especially with one of the main fins horizontally toward the indoor side,are more favorable in auxiliary-heating ***,it is recommended to add one arc-shaped branch fin to each main fin to achieve a balance between performance improvement and material ***,branch fins with larger arc angles are preferred in auxiliary-heating mode,while smaller arc angles are conducive to injecting heat into the wall along main fins in load-reduction mode and preventing the heat near the inner surface from being *** the direct influence of the strengthened invisible thermal barrier,Arc-finTABEs can reduce the amount of static insulation layer by 20%–80%while achieving equivalent thermal performances as conventional high-performance walls.