Impact of solar reflectivity and infrared emissivity on the thermal performance of metal and concrete roofs in cloudy warmhumid climate

作     者：Jefferson Torres-Quezada Antonio Isalgué Helena Coch Jefferson Torres-Quezada;Antonio Isalgué;Helena Coch

作者机构：CONSISO LabUniversidad Católica de CuencaCuenca 010102Ecuador ArchitectureEnergy and EnvironmentPolytechnic University of CataloniaBarcelona 08028Spain 

出 版 物：《Frontiers of Architectural Research》 (建筑学研究前沿（英文版）)

年 卷 期：2024年第13卷第4期

页      面：842-857页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0813[工学-建筑学] 

基　　金：supported by Catholic University of Cuenca,project code PICODS21-35 HC+AI acknowledges the Spanish Ministry of Economy,project code:BIA2016-77675-R and PID2020-116036RB-I00 

主　　题：Concrete roof Metal roof Radiative properties Simulations Measurements 

摘      要：Regions near latitude 0
are characterized by warm-humid climate and also by high *** these regions,metal roofs has been the most widely used ***,in the last decades,the use of heavy concrete roofs has increased *** its material characteristics,this roof typology offers a higher thermal resistance and thermal mass than a metal *** strategies focus on the use of these characteristics,as well as the use of high reflectivity and ***,the impact of cloudiness on the effectiveness of these strategies has been little *** research focuses on the impact of reflectivity and emissivity change on the thermal performance of these two roofs in a cloudy warm-humid *** achieve this objective,simulations validated with measurements were *** results show that the efficiency of reflectivity and emissivity is lower in this region compared to other *** impact of these properties is further reduced with increasing thermal mass or decreasing thermal transmittance,so the effectiveness of reflectivity and emissivity is minimal on the concrete ***,this study supports that a metal roof with a reflectivity and emissivity above 0.70 can offer lower daily average temperatures than a concrete roof.