Design of a passive temperature management house using composite phase change materials

Yuyang He, Ruiting Feng, Shaobo Wang, Xiu-Wen Wu and Guangbo Hu

Energy, 2025, vol. 319, issue C

Abstract: A novel passive temperature management house design utilizing composite phase change materials (cPCMs) to effectively regulate indoor temperatures was presented here. The design comprises two key components: a roof integrated with a high photothermal conversion phase change plate (PA-EG12FeNPs) and an interior system featuring low-supercooling hydrated salt PCM radiators. The PA-EG12FeNPs material, synthesized through a vacuum impregnation method, demonstrated excellent thermal properties, with a stable phase transition temperature range of 44.7 °C–45.7 °C and a phase transition enthalpy of 108.5 J/g – 127.8 J/g. The photothermal conversion efficiency of the PA-EG12Fe-6 sample reached 89.2 %, a 23.28 % improvement over the base material. Additionally, the hydrated salt composite material (CaCl2·6H2O-MgCl2·6H2O) used in the radiators showed significant chemical stability and reduced supercooling effects when 0.5 wt% of Ba (OH)2·8H2O was added. The feasibility of the design was validated through experiments, which demonstrated that by adjusting the light exposure area and arrangement of the PCM radiators, indoor temperatures can be effectively managed. During the autumn and winter seasons, the system can maintain indoor temperatures above 18 °C throughout the day, with an additional 115 min above 18 °C during the night, providing a new strategy for passive thermal regulation in buildings.

Keywords: Phase change materials; Photo-thermal conversion; Thermal management; Passive house design (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:319:y:2025:i:c:s0360544225006048

DOI: 10.1016/j.energy.2025.134962

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