具有优异相变形状稳定特性的聚乙二醇/陶瓷复合球团的新制备及其在温室保温中的潜在应用

IF 6.1 2区 工程技术 Q2 ENERGY & FUELS Applied Thermal Engineering Pub Date : 2024-11-28 DOI:10.1016/j.applthermaleng.2024.125096
Zhiye Ma, Qian Zhang, Xuechun Wang, Shichao Zong, Bo Bai
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引用次数: 0

摘要

有机固液相变材料在相变过程中易发生泄漏,在实际应用中面临挑战。为了解决这一问题,我们采用熔融浸渍法构建了具有储热能力、热稳定性和坚固质地的聚乙二醇(PEG)/陶瓷颗粒(CPs)复合相变形状稳定材料(PCSHs)。由于其表面微孔结构产生的毛细作用和表面张力,PCSHs在泄漏试验中表现出显著的形状稳定性。它们还可以将光能转化为热能,并将其作为潜热储存起来,在PEG负载为~ 12%时,实现最佳光热转换效率为45.21%,最大熔化焓为13.33 kJ/kg。室外温室保温模拟实验证实,在光照停止后,PCSHs能将土壤温度维持在30℃以上30 min以上。这项工作提出了一个简单的合成策略,形状稳定的pcm与温室保温的潜在应用。
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Novel fabrication of polyethylene glycol/ceramic composite pellets with an excellent phase change shape stable trait and their potential applications for greenhouse insulation
Organic solid–liquid phase change materials (PCMs) face challenges in practical applications due to their susceptibility to leakage during phase transitions. To address this issue, we constructed the polyethylene glycol (PEG)/ceramic pellets (CPs) composite phase change shape stable materials (PCSHs) with thermal energy storage capability, thermal stability, and a firm texture using the melting impregnation method. The PCSHs exhibit remarkable shape stability in the leakage test due to the capillary action and surface tension generated by the micropore structure on their surface. They also can convert light energy into heat and store it as latent heat, achieving an optimal photothermal conversion efficiency of 45.21 % and a maximum melting enthalpy of 13.33 kJ/kg at a PEG loading of ∼ 12 %. An outdoor greenhouse insulation simulation experiment confirmed that the PCSHs can maintain soil temperatures above 30 °C for over 30 min after illumination ceases. This work presents a facile synthesis strategy for shape-stable PCMs with potential applications in greenhouse insulation.
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来源期刊
Applied Thermal Engineering
Applied Thermal Engineering 工程技术-工程:机械
CiteScore
11.30
自引率
15.60%
发文量
1474
审稿时长
57 days
期刊介绍: Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.
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