南华大学学报（自然科学版）2023，Vol.37Issue(5)：56-65,10.DOI:10.19431/j.cnki.1673-0062.2023.05.009
附加式屋顶通风结构二维简化传热分析
Two-dimensional Simplified Heat Transfer Analysis of Structure of Additional Roof Ventilation
摘要
Abstract
Reducing energy consumption in buildings is crucial to the development of low-carbon buildings.The impact of roof heat gain and loss on building energy consumption cannot be ignored.Based on the roof ventilation and heat insulation structure,this paper proposes and introduces the principle of a supplementary roof ventilation and insulation system,analyzes its heat transfer process,and employs numerical simulation to investigate the thermal characteristics of the ventilation structure.The results show that there is an ex-ponential relationship between the equivalent thermal resistance of the ventilation cavity and the solar radiation intensity and outdoor air temperature for the determined additional roof ventilation structure under steady state conditions.At the same outdoor air tempera-ture,the equivalent thermal resistance of the ventilation chamber has the maximum value.The maximum equivalent thermal resistance is linearly correlated with outdoor air tempera-ture,material thermal resistance ratio and reciprocal of surface emissivity of thermal insu-lation material.The thermal characteristics of additional roof ventilation structure in differ-ent areas are analyzed by using the calculated relation.关键词
附加式屋顶通风隔热结构/当量热阻/稳态过程Key words
additional roof ventilation and heat insulation structure/equivalent thermal re-sistance/steady-state process分类
建筑与水利引用本文复制引用
龙正熠,罗清海,李光辉,涂敏,邓滔文..附加式屋顶通风结构二维简化传热分析[J].南华大学学报（自然科学版）,2023,37(5):56-65,10.基金项目
国家自然科学基金青年科学基金项目(51708272) （51708272）
