Thermal evaluation of a Trombe wall with phase change material for heating in the cold season: Effect of PCM location, melting point, and wall materials

IF 6.7 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of building engineering Pub Date : 2024-12-31 DOI:10.1016/j.jobe.2024.111620

E. Vázquez-Beltrán, L.F. Aparicio-Mercado, I. Hernández-López, J.F. Hinojosa, J.P. Ibarra-Salazar

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引用次数: 0

Abstract

A parametric study of a phase change material Trombe wall (PCM-TW) system was carried out under the climatic conditions of a temperate city (Cwb) during the coldest period of the year. An alternative sustainable and passive indirect gain technology for heating buildings is the Trombe wall (TW). This work analyses in detail the effect that the melting point and position of a phase change material (PCM) have together on the thermal performance of a TW. In addition, this work analyzes configurations of construction materials that have not been reported previously. The results were presented in terms of daytime thermal efficiency, nighttime thermal efficiency, storage efficiency, dissipation efficiency, and PCM average liquid fraction. The results showed that the best nighttime performance is obtained by placing a low melting point PCM (29 °C) on a concrete wall and locating it at the opposite end of the absorber surface. On the other hand, PCMs with high melting points (48 and 60 °C) present the worst thermal performance of the system since in no configuration could they reach the liquid phase completely. In addition, the performance improves if the wall is made of concrete (high thermal diffusivity) in the absorber section and adobe (low thermal diffusivity) in the room section. This combination produced the maximum values of storage efficiency (27.66%) and dissipation efficiency (67.60%).

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冷季相变材料Trombe墙体的热评价：PCM位置、熔点和墙体材料的影响

在温带城市（Cwb）一年中最冷时期的气候条件下，对相变材料Trombe墙（PCM-TW）系统进行了参数化研究。另一种可持续的被动间接增益技术是Trombe墙（TW）。本文详细分析了相变材料的熔点和位置对TW热工性能的共同影响。此外，这项工作还分析了以前没有报道过的建筑材料的配置。结果给出了白天热效率、夜间热效率、储存效率、耗散效率和PCM平均液体分数。结果表明，在混凝土壁上放置低熔点PCM（29°C）并将其放置在吸收器表面的另一端，可以获得最佳的夜间性能。另一方面，高熔点（48°C和60°C）的pcm在系统中表现出最差的热性能，因为在任何配置下它们都不能完全到达液相。此外，如果墙壁在吸收部分由混凝土（高热扩散系数）制成，而在房间部分由土坯（低热扩散系数）制成，则性能会得到改善。该组合产生了最大的存储效率（27.66%）和耗散效率（67.60%）。

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

Journal of building engineering Engineering-Civil and Structural Engineering

CiteScore

10.00

自引率

12.50%

发文量

1901

审稿时长

35 days

期刊介绍： The Journal of Building Engineering is an interdisciplinary journal that covers all aspects of science and technology concerned with the whole life cycle of the built environment; from the design phase through to construction, operation, performance, maintenance and its deterioration.