文献类型：期刊文献

英文题名：In-depth molecular dynamics analysis of the thermal energy storage and transfer enhancement mechanism within carbonate nanofluid system

作者：An, Zhoujian Mao, Shuai Du, Xiaoze Zhang, Dong Fu, Jian Ding, Yong

第一作者：An, Zhoujian

通信作者：An, ZJ[1];Du, XZ[1];An, ZJ[2];An, ZJ[3]

机构：[1]Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China;[2]Guizhou Inst Technol, Sch Aerosp Engn, Guiyang 550025, Peoples R China;[3]Shouhang Hightech Energy Technol Co Ltd, Jiuquan 735000, Peoples R China

第一机构：Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China

通信机构：corresponding author), Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Aerosp Engn, Guiyang 550025, Peoples R China;corresponding author), Shouhang Hightech Energy Technol Co Ltd, Jiuquan 735000, Peoples R China.|贵州理工学院;

年份：2026

卷号：255

外文期刊名：INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001574022500002)】；

基金：This work was financially supported by the National Natural Science Foundation of China (52206087; 52130607) ; the China Postdoctoral Science Foundation (2025M770576) ; the Youth Doctor Foundation Project of Gansu Provincial Education Department (2025QB-027) ; the Lanzhou Youth Science and Technology Talent Innovation Project (2024-QN-18) ; the Science and Technology Project of Gansu province (25CXGA058) ; the Industrial Support Plan Project of Gansu Provincial Education Department (2025CYZC-034) ; the Guizhou Provincial Basic Research Program (Natural Science) (MS [2025] 189) ; the Doctoral Research Funds of Lanzhou University of Technology (061907) ; the Red Willow Excellent Youth Project of Lanzhou University of Technology and the Young Faculty Interdisciplinary Research Cultivation Program of Lanzhou University of Technology.

语种：英文

外文关键词：Molecular dynamics; Specific heat capacity; Thermal conductivity; Microscopic mechanism

摘要：To further improve the efficiency of the next-generation solar thermal power generation systems, higher temperature requirements were imposed on heat transfer materials. Ternary carbonates had a wider operating temperature range, meeting the requirements of the next generation of solar thermal power generation systems. Meanwhile, adding SiO2 to the ternary carbonates can improve their heat transfer and storage performance. This study explored the mechanism of nanoparticle enhanced thermal and physical properties of the ternary carbonates, and provided a more comprehensive analysis of the mechanism by which nanoparticles improve the thermal conductivity (TC) and specific heat capacity (SHC) of the carbonates. including Brownian motion, microconvection, solid-liquid interfacial layers, and particle agglomeration, the key factors for enhancing the SHC and TC of the ternary carbonates with nanoparticles were revealed. The result demonstrated that the microconvection effect previously proposed in literature as a mechanism for enhancing heat transfer efficiency be unable to elucidate the observed TC improvement in nanofluids. The enhancement in TC can be ascribed to the Brownian motion occurring between particles, the presence of 0.3 nm solid-liquid interfacial layers around nanoparticles, and nanoparticles agglomeration. Investigations into heat storage mechanism revealed that semisolid layers, the high SHC of nanoparticles, and the good dispersibility contribute to increase SHC of the carbonates. While validating existing theories, this study identified Brownian motion as an additional factor enhanced TC, systematically validating the mechanism behind thermophysical property reinforcement in the ternary carbonates. These findings serve as reference framework for informing the selection and design processes of nanocomposite materials in subsequent investigations.