{"title":"Comprehensive enhanced performance of stearic acid nanoemulsions with nanoparticles addition for thermal energy storage","authors":"","doi":"10.1016/j.solmat.2024.113079","DOIUrl":null,"url":null,"abstract":"<div><p>Fatty acid phase change emulsions possess the combined properties of heat transfer fluids and phase change materials, making them suitable for applications in the energy industries. This study aims to develop aqueous phase change emulsions using stearic acid as the heat storage medium. Stable nanoemulsions with an average droplet size of 100 nm and various stearic acid weight fractions were successfully prepared. Melting enthalpy up to 42.06 kJ/kg was achieved. The nanoemulsions exhibited good stability under conditions of storage and 300 freezing/melting cycles. Furthermore, when a 6 wt% ratio of nanoparticles boron nitride (BN) was added to the emulsion containing 20 wt% dispersed phase, the thermal conductivity increased by 15.7 %, and the supercooling degree reduced by 57.1 % compared to the original emulsion, while the emulsion demonstrated good dispersion stability.</p></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":null,"pages":null},"PeriodicalIF":6.3000,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solar Energy Materials and Solar Cells","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S092702482400391X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
Fatty acid phase change emulsions possess the combined properties of heat transfer fluids and phase change materials, making them suitable for applications in the energy industries. This study aims to develop aqueous phase change emulsions using stearic acid as the heat storage medium. Stable nanoemulsions with an average droplet size of 100 nm and various stearic acid weight fractions were successfully prepared. Melting enthalpy up to 42.06 kJ/kg was achieved. The nanoemulsions exhibited good stability under conditions of storage and 300 freezing/melting cycles. Furthermore, when a 6 wt% ratio of nanoparticles boron nitride (BN) was added to the emulsion containing 20 wt% dispersed phase, the thermal conductivity increased by 15.7 %, and the supercooling degree reduced by 57.1 % compared to the original emulsion, while the emulsion demonstrated good dispersion stability.
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.
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