Incorporation of nano-encapsulated PCM in clay hollow blocks and cement layer for improving energy efficiency in buildings: A numerical approach

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-06-25 DOI:10.1016/j.csite.2025.106526

Raouf Hassan , Ali B.M. Ali , Omar Al-Khatib , Ibrahim Mahariq

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引用次数: 0

Abstract

The growing global demand for building energy highlights the need for advanced materials that enhance thermal performance and reduce greenhouse gas emissions. This study explores the integration of NEPCM into clay hollow blocks and an external cement layer to improve the energy efficiency of building envelopes. Unlike prior studies that rely on simplified thermodynamic models, this research employs a detailed numerical approach based on modified PDEs and effective property models that account for the latent heat behavior of the NEPCM core. Results indicate that increasing φ from 0 % to 10 % delays T_si peaks by up to 0.8 h, maintains it between 23.3 °C and 26.6 °C, and reduces q_si by approximately 13 %. Furthermore, P_d exhibits a parabolic response to ΔT_s, achieving a maximum reduction of 16 % at ΔT_s = 20 °C with φ = 10 %. These findings underscore the potential of NEPCM-integrated building materials to support sustainable and thermally adaptive building design.

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在粘土空心砌块和水泥层中加入纳米封装PCM以提高建筑能源效率：数值方法

全球对建筑能源日益增长的需求凸显了对先进材料的需求，这些材料可以提高热性能并减少温室气体排放。本研究探讨了NEPCM与粘土空心砌块和外部水泥层的整合，以提高建筑围护结构的能源效率。与以往依赖于简化热力学模型的研究不同，本研究采用了基于修正偏微分方程和有效性质模型的详细数值方法，以解释NEPCM堆芯的潜热行为。结果表明，φ从0%增加到10%可使Tsi峰延迟0.8 h，保持在23.3°C和26.6°C之间，并使qsi降低约13%。此外，Pd对ΔTs呈抛物线型响应，在ΔTs = 20°C, φ = 10%时，最大还原率为16%。这些发现强调了nepcm集成建筑材料在支持可持续和热适应性建筑设计方面的潜力。

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.