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<p>The Phase Change Materials (PCMs) can significantly enhance the building energy efficiency by incorporating thermal energy storage into concrete. The present paper provides an analysis of the application of Hybrid PCM -Embedded Concrete (HPCMC) to address the low thermal conductivity and thermal inertia of concrete. To determine the impacts of these PCM integration techniques to thermal performance, mechanical strength, durability, and climate-dependent energy saving, compare three PCM integration techniques: Standard PCM mixing, Alternative encapsulation and Aerogel enhanced PCM mix. Encapsulation and impregnation methods were used in the preparation of concrete samples with a maximum content of 30% paraffin-based PCM by weight. Thermal conductivity, latent heat, maximum temperature drop, compressive strength and stability during 500 or more thermal cycles at 25–45&#xa0;°C were measured by tests. It was found that addition of PCM decreases peak temperature by up to 7.5&#xa0;°C, decreases thermal conductivity by 30.6% and increases the latent heat storage capability to 250&#xa0;J/g with mixes that have been enhanced with aerogel. The reduction in energy consumption of HVAC decreases 20.6% in hot-dry climate because of improved thermal buffering. Nonetheless, compressive strength reduced by 25.7%, 17.9% and 31.2% in Standard PCM, Alternative encapsulation and Aerogel enhanced PCM mixes respectively. Long-term durability tests show that PCM retention rates stand at 85.4% as a percentage of Standard PCM, almost 91–92% of Alternative encapsulation, and nearly 95–96% of Aerogel enhanced mixes with a 500 cycle test. These results indicate that HPCMC has a great potential of low-energy and near-zero-energy buildings and Alternative encapsulation demonstrates the optimal combination of mechanical stability and thermal performance.</p>

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Hybrid PCM-embedded concrete for thermal energy storage and energy-efficient smart buildings

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • S. Deepa Shri,
  • Ali B. M. Ali,
  • Arunkumar Munimathan,
  • Ratchagaraja Dhairiyasamy,
  • M. Kannan,
  • Mukhtar Hamid Abed,
  • Mohammad Amir Khan,
  • Aseel Smerat

摘要

The Phase Change Materials (PCMs) can significantly enhance the building energy efficiency by incorporating thermal energy storage into concrete. The present paper provides an analysis of the application of Hybrid PCM -Embedded Concrete (HPCMC) to address the low thermal conductivity and thermal inertia of concrete. To determine the impacts of these PCM integration techniques to thermal performance, mechanical strength, durability, and climate-dependent energy saving, compare three PCM integration techniques: Standard PCM mixing, Alternative encapsulation and Aerogel enhanced PCM mix. Encapsulation and impregnation methods were used in the preparation of concrete samples with a maximum content of 30% paraffin-based PCM by weight. Thermal conductivity, latent heat, maximum temperature drop, compressive strength and stability during 500 or more thermal cycles at 25–45 °C were measured by tests. It was found that addition of PCM decreases peak temperature by up to 7.5 °C, decreases thermal conductivity by 30.6% and increases the latent heat storage capability to 250 J/g with mixes that have been enhanced with aerogel. The reduction in energy consumption of HVAC decreases 20.6% in hot-dry climate because of improved thermal buffering. Nonetheless, compressive strength reduced by 25.7%, 17.9% and 31.2% in Standard PCM, Alternative encapsulation and Aerogel enhanced PCM mixes respectively. Long-term durability tests show that PCM retention rates stand at 85.4% as a percentage of Standard PCM, almost 91–92% of Alternative encapsulation, and nearly 95–96% of Aerogel enhanced mixes with a 500 cycle test. These results indicate that HPCMC has a great potential of low-energy and near-zero-energy buildings and Alternative encapsulation demonstrates the optimal combination of mechanical stability and thermal performance.