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

在线阅读下载全文

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

机构地区:[1]College of Architecture and Art,Hefei University of Technology,Hefei,230601,China [2]Anhui Province Key Laboratory of Intelligent Building&Building Energy Saving,Anhui Jianzhu University,Hefei,230601,China [3]School of Architecture and Urban Planning,Anhui Jianzhu University,Hefei,230601,China [4]College of City Construction,Jiangxi Normal University,Nanchang,330022,China

出  处:《Building Simulation》2024年第9期1461-1489,共29页建筑模拟(英文)

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).

摘  要:Thermally activated building envelopes(TABEs)are multifunctional component that combines structural and energy properties.Based 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 thickness.Results 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 mode.Besides,it is recommended to add one arc-shaped branch fin to each main fin to achieve a balance between performance improvement and material usage.Moreover,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 extracted.Under 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.

关 键 词:thermo-activated building envelope thermal barrier formation performance enhancement arc-shaped metal fins fin parameters CFD model 

分 类 号:TG14[一般工业技术—材料科学与工程]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象