Preparation and thermal stability research of oxalic acid dihydrate-glutaric acid/PAMPS phase change gel for solar thermal energy utilization

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells Pub Date : 2024-10-19 DOI:10.1016/j.solmat.2024.113219

Sili Zhou , Wenbo Zhang , Wenhui Yuan , Xuenong Gao , Ziye Ling , Xiaoming Fang

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引用次数: 0

Abstract

Thermal energy storage technology based on phase change materials (PCMs) can address the temporal and spatial mismatches in solar thermal energy conversion, thereby enhancing solar energy utilization efficiency. However, the liquid flow and poor thermal reliability of PCMs limit their large-scale application in solar thermal systems. In this study, we employ a simple “one-pot method” to prepare a form-stable and thermally reliable oxalic acid dihydrate-glutaric acid/poly 2-Acrylamido-2-methyl-1-propanesulfonic acid (OAD-GA/PAMPS) phase change gel. The OAD-GA/PAMPS phase change gel melts at 64.5 °C with a phase change enthalpy of 193.6 kJ/kg, the tensile strength is 7.707 MPa, and the compressive strength is 16.940 MPa. By incorporating 5 wt% BN particles, the thermal conductivity of OAD-GA/PAMPS phase change gel reaches 0.63 W/(m·K). After 200 heating-cooling cycles, the phase change temperature of the OAD-GA/PAMPS phase change gel remains nearly unchanged, and the phase change enthalpy decreases by only 5.7 %. The photo-thermal conversion efficiency of the OAD-GA/PAMPS phase change gel is 82.7 %. The high thermal reliability and photo-thermal conversion efficiency of the OAD-GA/PAMPS phase change gel makes it suitable for solar thermal energy storage applications.

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太阳能热利用草酸二水合物-戊二酸/PAMPS 相变凝胶的制备与热稳定性研究

基于相变材料（PCM）的热能储存技术可以解决太阳能热能转换中的时空不匹配问题，从而提高太阳能的利用效率。然而，PCMs 的液态流动性和较差的热可靠性限制了其在太阳能热系统中的大规模应用。在本研究中，我们采用简单的 "一锅法 "制备了形态稳定、热可靠的草酸二水合物-戊二酸/聚 2-丙烯酰胺基-2-甲基-1-丙磺酸（OAD-GA/PAMPS）相变凝胶。OAD-GA/PAMPS 相变凝胶的熔点为 64.5 ℃，相变焓为 193.6 kJ/kg，抗拉强度为 7.707 MPa，抗压强度为 16.940 MPa。加入 5 wt% 的 BN 颗粒后，OAD-GA/PAMPS 相变凝胶的导热系数达到 0.63 W/(m-K)。经过 200 次加热-冷却循环后，OAD-GA/PAMPS 相变凝胶的相变温度几乎保持不变，相变焓仅降低了 5.7%。OAD-GA/PAMPS 相变凝胶的光热转换效率为 82.7%。OAD-GA/PAMPS 相变凝胶的高热稳定性和光热转换效率使其适用于太阳能热储应用。

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来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.