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<p>Energy consumption in residential buildings is a major contributor to overall energy use, environmental impact, and household expenses. In social housing (SH), optimizing thermal performance is essential to reduce energy demand. Implementing bioclimatic strategies focused on improving building thermal performance is key to reducing energy demand and expenses, besides enhancing comfort. This study aims to evaluate the applicability of steel slag (SS) as a bioclimatic strategy for SH across ten Brazilian climates using EnergyPlus simulations under current and future (2050) scenarios based on RCP 2.5 and 8.5. Compared to conventional blocks, SS enhances thermal performance by lowering heating and cooling loads and improving comfort. It reduces heating demand by up to 30% currently and 75% in the future in humid subtropical climates. In tropical climates, despite notable thermal load reductions, thermal comfort remains low and costs high, while subtropical regions experience moderate costs. Overall, SS is an effective high thermal inertia material that, when combined with complementary passive strategies, can maximize energy efficiency and comfort tailored to climate conditions.</p>

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Thermal and economic assessment of steel slag masonry in social housing under climate change scenarios

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Karina Marcele Marques,
  • Marialaura Herrera Rosas,
  • Joaquin Humberto Aquino Rocha,
  • Nahúm Gamalier Cayo Chileno,
  • Ricardo André Fiorotti Peixoto

摘要

Energy consumption in residential buildings is a major contributor to overall energy use, environmental impact, and household expenses. In social housing (SH), optimizing thermal performance is essential to reduce energy demand. Implementing bioclimatic strategies focused on improving building thermal performance is key to reducing energy demand and expenses, besides enhancing comfort. This study aims to evaluate the applicability of steel slag (SS) as a bioclimatic strategy for SH across ten Brazilian climates using EnergyPlus simulations under current and future (2050) scenarios based on RCP 2.5 and 8.5. Compared to conventional blocks, SS enhances thermal performance by lowering heating and cooling loads and improving comfort. It reduces heating demand by up to 30% currently and 75% in the future in humid subtropical climates. In tropical climates, despite notable thermal load reductions, thermal comfort remains low and costs high, while subtropical regions experience moderate costs. Overall, SS is an effective high thermal inertia material that, when combined with complementary passive strategies, can maximize energy efficiency and comfort tailored to climate conditions.