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The integration of Phase Change Materials (PCMs) into building components has gained attention as a strategy to enhance thermal performance and reduce energy consumption. Among various approaches, the impregnation of highly porous materials with PCMs offers a promising solution by providing encapsulation while maintaining efficient thermal storage. This study investigates the capillary absorption of PCMs into a highly porous insulation material using the standard method for water absorption by partial immersion. The objective is to characterize the impregnation process and assess the impact of fluid properties and host microstructure on the absorption behavior. Capillary absorption coefficients (Aw) and maximum PCM uptake after 24 h were determined for three fluids: water, a paraffinic PCM, and a bio-based PCM. As expected, the absorption behavior is strongly influenced by fluid viscosity. Water exhibited the highest absorption rate (Aw = 1.55 kg/(m2 √s)), while the bio-based PCM demonstrated the lowest (Aw = 0.27 kg/(m2 √s)). Paraffinic PCM showed an intermediate absorption (Aw = 0.38 kg/(m2 √s)). The study provides valuable insights for optimizing PCM integration into highly porous building materials, contributing to the development of advanced, thermally responsive building solutions for improved energy efficiency and sustainability.

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Capillary Absorption Capability and Impregnation of Calcium Silicate Board with Phase Change Materials

  • 会议论文

  • 发表日期：

    2026年

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  • Rossella Cottone,
  • Miroslav Čekon,
  • Stefano Fantucci,
  • Christ Glorieux

摘要

The integration of Phase Change Materials (PCMs) into building components has gained attention as a strategy to enhance thermal performance and reduce energy consumption. Among various approaches, the impregnation of highly porous materials with PCMs offers a promising solution by providing encapsulation while maintaining efficient thermal storage. This study investigates the capillary absorption of PCMs into a highly porous insulation material using the standard method for water absorption by partial immersion. The objective is to characterize the impregnation process and assess the impact of fluid properties and host microstructure on the absorption behavior. Capillary absorption coefficients (Aw) and maximum PCM uptake after 24 h were determined for three fluids: water, a paraffinic PCM, and a bio-based PCM. As expected, the absorption behavior is strongly influenced by fluid viscosity. Water exhibited the highest absorption rate (Aw = 1.55 kg/(m2 √s)), while the bio-based PCM demonstrated the lowest (Aw = 0.27 kg/(m2 √s)). Paraffinic PCM showed an intermediate absorption (Aw = 0.38 kg/(m2 √s)). The study provides valuable insights for optimizing PCM integration into highly porous building materials, contributing to the development of advanced, thermally responsive building solutions for improved energy efficiency and sustainability.