Fabrication and characterization of docosane–dodecanol composite phase change materials for low-temperature domain thermal energy storage and recovery

Hongbing Chen, Chunyang Li, Fengjiao Yu, Men Li, Congcong Wang and Pingjun Nie

International Journal of Low-Carbon Technologies, 2025, vol. 20, 798-809

Abstract: The docosane–dodecanol (DE-CP) binary phase change materials (PCMs) were prepared to improve the heat diffusion performance of the photovoltaic/thermal (PV/T) system in this work. The phase transition temperature of DE-CP matches photovoltaic heat dissipation requirements, with 60 wt% DE achieving optimal latent heat of 243.8 kJ/kg. Expandable graphite maximizes expansion at 900°C for 60 seconds, resulting in high pore volume and adsorption capacity. Incorporating expanded graphite into DE-CP increases thermal conductivity from 0.135 to 1.383 W/(m·K) and ensures excellent compatibility and cyclic stability. This paper provides a reference for further development and integration of composite PCMs in solar PV/T systems.

Keywords: composite phase change materials; docosane–dodecanol; expanded graphite; thermal performance; heat storage (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:oup:ijlctc:v:20:y:2025:i::p:798-809.

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