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<p>This research focuses on practical considerations for implementing PCM Trombe walls in Tunisia’s diverse climatic zones, ranging from the Mediterranean coastal areas to the Saharan Desert. It aims to bridge gaps in existing literature by providing a comprehensive multi-climate analysis, combining numerical optimization, energy efficiency, and economic and environmental assessments. To address this, the coupled effects of melting temperature and PCM layer thickness were studied, focusing on their impact on the annual heating loads. Simulations were conducted using TRNSYS software in combination with the GenOpt optimization tool. The resulting optimal PCM thicknesses range from 2.43 to 3.56 cm, while the optimal melting temperatures varied from 28.12 to 29.93&#xa0;°C. The evaluation of energy performance reveals that the PCM Trombe wall significantly enhances thermal efficiency compared to conventional configurations. It stabilizes indoor temperatures, extends comfort periods by 5 h, and achieves substantial energy consumption reductions, extending from 41.69 to 65.29%, compared to classic configuration. An exhaustive examination of the economic feasibility of the PCM Trombe wall demonstrates favorable life cycle costs and payback periods of less than three years across all locations. The sensitivity analysis of a novel life cycle savings ratio indicates the potential for long-term savings of up to 80.37% in certain regions, while the environmental assessment reveals a substantial potential for reducing carbon dioxide emissions. Within a broader framework, these findings offer insights into the efficiency and adaptability of PCM Trombe wall technology across diverse geographical contexts, providing significant implications for sustainable building design and energy policy development.</p>

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Energy Efficiency and Economic Impacts of Integrating PCM Trombe Walls in Buildings: A Multi-climate Analysis

  • 期刊论文

  • 发表日期：

    2025年6月3日

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  • Narjes Dimassi,
  • Anouar Wajdi Dahmouni,
  • Med Mehdi Oueslati

摘要

This research focuses on practical considerations for implementing PCM Trombe walls in Tunisia’s diverse climatic zones, ranging from the Mediterranean coastal areas to the Saharan Desert. It aims to bridge gaps in existing literature by providing a comprehensive multi-climate analysis, combining numerical optimization, energy efficiency, and economic and environmental assessments. To address this, the coupled effects of melting temperature and PCM layer thickness were studied, focusing on their impact on the annual heating loads. Simulations were conducted using TRNSYS software in combination with the GenOpt optimization tool. The resulting optimal PCM thicknesses range from 2.43 to 3.56 cm, while the optimal melting temperatures varied from 28.12 to 29.93 °C. The evaluation of energy performance reveals that the PCM Trombe wall significantly enhances thermal efficiency compared to conventional configurations. It stabilizes indoor temperatures, extends comfort periods by 5 h, and achieves substantial energy consumption reductions, extending from 41.69 to 65.29%, compared to classic configuration. An exhaustive examination of the economic feasibility of the PCM Trombe wall demonstrates favorable life cycle costs and payback periods of less than three years across all locations. The sensitivity analysis of a novel life cycle savings ratio indicates the potential for long-term savings of up to 80.37% in certain regions, while the environmental assessment reveals a substantial potential for reducing carbon dioxide emissions. Within a broader framework, these findings offer insights into the efficiency and adaptability of PCM Trombe wall technology across diverse geographical contexts, providing significant implications for sustainable building design and energy policy development.