Numerical study of a cool roof and double-glazing window coupled to an air-cavity under a tropical Mexican climate

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-06-04 DOI:10.1016/j.csite.2025.106372

Y. Olazo-Gómez , I. Hernández-López , I. Zavala-Guillén , I. Hernández-Pérez , D. García-Pérez

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Abstract

This research presents a numerical study of the conjugate heat transfer in an air cavity with a concrete slab roof and a window on the east facade. We considered three different window configurations: a single clear glass window (C1), a double clear glass window (C2), and a double glass window with an inner clear glass and an outer reflective glass (C3), as well as three different types of roofs: gray roof, white roof, and black roof. Because both the conventional windows and roofs show high thermal energy gains that increase the energy dependence associated with using air conditioning equipment in buildings in tropical climates, we compared all cases regarding heat gains and temperature obtained under tropical weather conditions of Merida, Yucatan, Mexico. The results showed that WR is the option with the lowest temperature value at the inner surface of the roof (

T_{R, i n}

< 39

°C). In addition, the C3-WR configuration reduced energy transmission through the facades by up to 5693.1 Wh, prevented the emission of 74.3 kg of CO

_{2}

, and lowered electricity consumption costs by 13.2 USD/kWh compared to the C1-GR base case on the warmest day.

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墨西哥热带气候下冷屋顶和双层玻璃窗与空腔耦合的数值研究

本文对东立面有混凝土板屋顶和窗户的空腔内的共轭传热进行了数值研究。我们考虑了三种不同的窗户配置：单一透明玻璃窗（C1），双层透明玻璃窗（C2），双层透明玻璃窗与内部透明玻璃和外部反射玻璃（C3），以及三种不同类型的屋顶：灰色屋顶，白色屋顶和黑色屋顶。由于传统的窗户和屋顶都显示出较高的热能增益，这增加了在热带气候下使用空调设备的建筑物对能源的依赖，我们比较了墨西哥尤卡坦半岛梅里达热带天气条件下获得的热量增益和温度。结果表明，WR是屋面内表面温度值最低的选项（TR，在39℃）。此外，C3-WR配置减少了5693.1 Wh的外立面能量传输，防止了74.3 kg的二氧化碳排放，在最温暖的日子里，与C1-GR基本情况相比，降低了13.2美元/千瓦时的电力消耗成本。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.