Research on the Heat Transfer Performance of Novel Prefabricated Concrete Modular Unit Walls
-
摘要: 装配式混凝土模块建筑是工业化装配式建筑的最高集成形式,因其极高的标准化程度,在工业化生产、自动化装配与数字化运维方面具有天然优势,是推动“智能建造”发展、推动建筑业绿色低碳转型的重要途径之一。针对一种新型装配式混凝土模块结构体系,采用ANSYS软件,进行了模块单元外墙的传热性能有限元分析,揭示了干式连接件、外保温层等因素对外墙热性能的影响;分析了不同外保温构造条件下干式连接件所引起的局部热桥,探究了模块单元外墙平均传热系数适用计算方法。结果表明:在寒冷气候区条件下,盒式连接件处会形成局部热桥,使得框架结构部位平均传热系数提升3.4%。随着外覆保温层厚度的增加,热桥效应被逐渐削弱,一维面积加权与三维模拟值对于外墙平均传热系数的计算相对误差逐渐减小,当保温层厚度超过30 mm时误差已小于3%,当外保温层厚度达到70 mm时,外墙平均传热系数为0.42 W/(m2·K),满足DB 61/T 5033—2022《居住建筑节能设计标准》中对于“建筑层数>3”的外墙传热系数限值要求。Abstract: Prefabricated concrete modular construction represents the highest level of integration in industrialized prefabricated building systems. Owing to its exceptional degree of standardization, it possesses inherent advantages in industrialized production, automated assembly, and digital operation and maintenance. It serves as a crucial pathway for advancing "intelligent construction" and facilitating the green, low-carbon transformation of the building industry. This paper focuses on a novel prefabricated concrete modular structural system. Using ANSYS software, a finite element analysis was conducted to evaluate the thermal performance of the exterior walls in a modular unit. This study revealed the influence of factors such as dry connectors and external insulation layers on the wall's thermal performance. It also analyzed the local thermal bridges induced by dry connectors under various external insulation configurations and investigated applicable calculation methods for the average thermal transmittance (U-value) of the modular unit's exterior wall. The results indicated that under cold climate conditions, box-type connectors create local thermal bridges, increasing the average U-value at the structural frame sections by 3.4%. As the thickness of the external insulation layer increased, the thermal bridge effect was gradually mitigated. The relative error between the one-dimensional area-weighted method and the three-dimensional simulation for calculating the average wall U-value decreased progressively. When the insulation thickness exceeded 30 mm, the error fell below 3%. When the external insulation thickness reached 70 mm, the average U-value of the exterior wall is 0.42 W/(m2·K),complying with the specified limit for the thermal transmittance of the external wall, as stipulated for buildings with more than 3 storeys in Design Standard for Energy Efficiency of Residential Buildings(DB 61/T 5033—2022).
-
[1] 中华人民共和国住房和城乡建设部. 关于印发“十四五”建筑业发展规划的通知[EB/OL].(2022-01-19)[ 2026-02-05]. https://www.gov.cn/zhengce/zhengceku/2022-01/27/content_5670687.htm. [2] 周天华,王继琴,邵英豪,等. 弱框架-轻钢复合墙体装配式房屋结构体系[J]. 建筑科学与工程学报,2022,39(1):36-43. [3] 薛莎莎. 模块化思想在现代住宅设计中的运用[D]. 北京:北京建筑大学,2013. [4] 黄永胜. 模块化建筑的结构设计与BIM技术应用研究[D]. 广州:广州大学,2016. [5] 李业斌,朱朝艳. 预制装配式混凝土梁柱节点连接方式研究[J]. 吉林水利,2017(10):32-34. [6] KAYILI M,TAVIL A İ. Investigation of thermal performance of steel structural connections[J]. Energy and Buildings,2008,40(8):1531-1539. [7] 黄艺,胡冗冗,黄炜. 寒冷地区近零能耗装配式复合墙保温构造设计[J]. 建筑节能(中英文),2023,51(10):118-124. [8] 黄炜,孙玉娇,张家瑞,等. 装配式墙体结构新型连接技术研究现状[J]. 工业建筑,2020,50(7):181-189. [9] 中华人民共和国住房和城乡建设部. 装配式混凝土建筑技术标准:GB/T 51231—2016[S]. 北京:中国建筑工业出版社,2016. [10] ASIZ A,SMITH I. Thermal performance of innovative building components in cold climates:a focus on prefabricated connections[J]. Energy and Buildings,2019,183:729-738. [11] 王羽,钟立博. 装配式外墙板构造对热工性能的影响[J]. 建设科技,2023(12):88-90. [12] 赵子文,张润嘉,王德才. 盒式螺栓连接装配式建筑墙体传热特征数值模拟分析[J]. 建筑节能(中英文),2025,53(1):56-61. [13] KIM Y J,ALLARD A. Thermal response of precast concrete sandwich walls with various steel connectors for architectural buildings in cold regions[J]. Energy and Buildings,2014,80:137-148. [14] 徐政,胡冗冗,黄炜. 装配式复合墙结构体系干式连接件传热模拟分析[J]. 建筑节能(中英文),2023,51(3):103-109. [15] 卢煜,刘明蓉,周渝,等. 装配式建筑外围护结构节能技术研究综述[J]. 西华大学学报(自然科学版),2023,42(6):93-103. [16] 林正豪. 近零能耗导向的轻质装配式建筑之围护系统设计研究[D]. 北京:清华大学,2018. [17] 中华人民共和国住房和城乡建设部. 民用建筑热工设计规范:GB 50176—2016[S]. 北京:中国建筑工业出版社,2016. [18] KAYILLO A,GE H,ATHIENITIS A,et al. Experimental study of thermal and airtightness performance of structural insulated panel joints in cold climates[J]. Building and Environment,2017,115:345-357. [19] 张相勇,高占祥,李豪,等. 一种ALC墙板与钢梁和混凝土楼板连接构造:CN115977258A[P]. 2023-04-18. [20] 陕西省住房和城乡建设厅,陕西省市场监督管理局. 居住建筑节能设计标准:DB 61/T 5033—2022[S]. 西安:陕西省建设标准设计站,2022. -
点击查看大图
计量
- 文章访问数: 17
- HTML全文浏览量: 6
- PDF下载量: 0
- 被引次数: 0
登录
注册
E-alert
登录
注册
E-alert
下载: