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Numerical analysis on phase change progress and thermal performance of different roofs integrated with phase change material(PCM)in Moroccan semi-arid and Mediterranean climates

引用

Building Simulation 2023年第1期16卷 69-85页

作者： Yanqiu Huang Shan Yang Moussa Aadmi Yi Wang Mustapha Karkri Zhenhao Zhang State Key Laboratory of Green Building in Western China Xi'an University of Architecture and TechnologyNo.13 Yanta RD.Xi'an 710055China School of Building Services Science and Engineering Xi'an University of Architecture and TechnologyNo.13 Yanta RD.Xi'an 710055China LMASI ElectromagnetismPhysics of Plasmas and ApplicationsPolydisciplinary Faculty of NadorMohammed First UniversityB.P 30062700SelouaneNadorMorocco CERTES Univ Paris Est Creteil61 Avenue du Général de GaulleF-94010 CreteilFrance

Phase change material(PCM)applied to roofs can weak external heat entering the room to reduce air-conditioning energy *** this study,three forms of macro-encapsulated PCM roofs with different PCMs(RT27,RT31,RT35HC,PT37)are *** effects of PCM thickness,the encapsulation forms,and different PCMs on the thermal performance of the roof are discussed in Moroccan semi-arid and Mediterranean *** results show that as the PCM thickness increases,the peak temperature attenuation of the roof inner surface *** two climates,the pure PCM layer among the three encapsulation forms(*** PCM layer,PCM in aluminum tubes,PCM in triangular aluminum)is the easiest to appear the phenomenon of insufficient heat storage and release,while the reduction of the peak inner surface temperature and time lag is the most *** the PCM in the aluminum tube,phase change time is the shortest and the latent heat utilization ratio is the highest,while thermal regulation performance is the least *** PCM in triangular aluminum can improve the latent heat utilization ratio significantly,and its thermal regulation performance is in the *** semi-arid climate,the time lag increases with phase change temperature *** time lag could reach up to 6 h with 37℃phase transition *** Mediterranean climate,the longest time lag with RT31 is 5 h,while the lowest peak inner surface temperature appears with *** obtained conclusions could provide guidance for the application of PCM roofs in these two climates.

关键词： numerical simulation PCM roof thermal performance inner surface temperature time lag

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