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<p>Trombe walls represent an effective passive solar heating strategy that can significantly improve indoor thermal comfort and building energy efficiency. However, their overall performance strongly depends on geometric configuration and heat transfer enhancement techniques, which remain under continuous optimization. This study investigates how the integration of V-shaped fins influences the thermal behavior and energy performance of a Trombe wall system. Four fin configurations: 6, 8, 10, and 12 fins were examined experimentally and numerically under controlled conditions (ambient temperature of 16&#xa0;°C and solar radiation of 750&#xa0;W&#xa0;m<sup>–2</sup>). A three-dimensional CFD model was developed and validated using ANSYS FLUENT based on the finite-volume approach, while experimental data were used for verification. The results demonstrate that increasing the number of fins enhances both convective heat transfer and airflow circulation inside the wall. The thermal efficiency increased from 18.20&#xa0;% for the unfinned configuration to 26.46&#xa0;% for the 12-fin case, corresponding to a 45.38&#xa0;% improvement. Numerical and experimental results showed close agreement, with deviations ranging from 1 to 3&#xa0;°C. The findings confirm that incorporating V-shaped fins substantially improves the thermal performance and temperature uniformity of Trombe walls, providing an effective design pathway for sustainable and energy-efficient buildings.</p>

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Investigation of Heat Transfer and Fluid Flow in Innovative Trombe Wall: Numerical Simulation and Experimental Validation

  • 期刊论文

  • 发表日期：

    2025年12月8日

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  • Ons Ghriss,
  • Khaoula Friji,
  • Abdallah Bouabidi,
  • Moataz M. Abdel-Aziz,
  • Mohammed El Hadi Attia,
  • Mohamed Razak Jeday

摘要

Trombe walls represent an effective passive solar heating strategy that can significantly improve indoor thermal comfort and building energy efficiency. However, their overall performance strongly depends on geometric configuration and heat transfer enhancement techniques, which remain under continuous optimization. This study investigates how the integration of V-shaped fins influences the thermal behavior and energy performance of a Trombe wall system. Four fin configurations: 6, 8, 10, and 12 fins were examined experimentally and numerically under controlled conditions (ambient temperature of 16 °C and solar radiation of 750 W m–2). A three-dimensional CFD model was developed and validated using ANSYS FLUENT based on the finite-volume approach, while experimental data were used for verification. The results demonstrate that increasing the number of fins enhances both convective heat transfer and airflow circulation inside the wall. The thermal efficiency increased from 18.20 % for the unfinned configuration to 26.46 % for the 12-fin case, corresponding to a 45.38 % improvement. Numerical and experimental results showed close agreement, with deviations ranging from 1 to 3 °C. The findings confirm that incorporating V-shaped fins substantially improves the thermal performance and temperature uniformity of Trombe walls, providing an effective design pathway for sustainable and energy-efficient buildings.