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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Preparation and thermal performance of a novel 1,10-decanediol -paraffin/expanded graphite composite phase change material for solar thermal utilization
AU - Fu, K.
AU - Mo, S.
AU - Li, Q.
AU - Zhou, Z.
AU - Jia, L.
AU - Du, Y.
AU - Chen, Y.
PY - 2025/5/8
Y1 - 2025/5/8
N2 - The intermittent nature of solar irradiation poses significant challenges to the energy transfer stability of conventional solar-thermal conversion materials. To address this, solar-thermal phase change materials (PCMs) integrate thermal conversion and storage, mitigating temporal and spatial discontinuities of solar energy. However, existing PCMs suffer from limitations such as inadequate solar absorption, leakage, and low phase change enthalpy. In this study, a novel binary eutectic PCM comprising 1,10-decanediol (DDL) and paraffin wax (PW) was synthesized via melt blending. Expanded graphite (EG) was incorporated as a thermal conductivity enhancer and structural support, with a shape-stabilized composite PCM fabricated through vacuum impregnation. The DDL-PW/EG composite achieved a high encapsulation efficiency of 90%, exhibiting a phase change temperature of 63.2 °C and a latent heat capacity of 203.9 kJ·kg−1. Notably, its thermal conductivity reached 6.89 W·m−1·K−1, 13.78 times higher than that of pristine DDL-PW, while maintaining 85.0% photothermal conversion efficiency. Accelerated thermal cycling tests (200 cycles) revealed negligible degradation in phase change temperature and enthalpy, underscoring exceptional thermal reliability of the composite. Combining robust thermal storage performance with efficient solar-thermal conversion, the DDL-PW/EG composite demonstrates significant potential for advancing solar energy harvesting and storage applications.
AB - The intermittent nature of solar irradiation poses significant challenges to the energy transfer stability of conventional solar-thermal conversion materials. To address this, solar-thermal phase change materials (PCMs) integrate thermal conversion and storage, mitigating temporal and spatial discontinuities of solar energy. However, existing PCMs suffer from limitations such as inadequate solar absorption, leakage, and low phase change enthalpy. In this study, a novel binary eutectic PCM comprising 1,10-decanediol (DDL) and paraffin wax (PW) was synthesized via melt blending. Expanded graphite (EG) was incorporated as a thermal conductivity enhancer and structural support, with a shape-stabilized composite PCM fabricated through vacuum impregnation. The DDL-PW/EG composite achieved a high encapsulation efficiency of 90%, exhibiting a phase change temperature of 63.2 °C and a latent heat capacity of 203.9 kJ·kg−1. Notably, its thermal conductivity reached 6.89 W·m−1·K−1, 13.78 times higher than that of pristine DDL-PW, while maintaining 85.0% photothermal conversion efficiency. Accelerated thermal cycling tests (200 cycles) revealed negligible degradation in phase change temperature and enthalpy, underscoring exceptional thermal reliability of the composite. Combining robust thermal storage performance with efficient solar-thermal conversion, the DDL-PW/EG composite demonstrates significant potential for advancing solar energy harvesting and storage applications.
U2 - 10.1016/j.solmat.2025.113684
DO - 10.1016/j.solmat.2025.113684
M3 - Journal article
VL - 289
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
SN - 0927-0248
M1 - 113684
ER -