熔盐纳米流体增强机理的研究

IF 2.1 4区 工程技术 Q3 CHEMISTRY, PHYSICAL
Xiong Yaxuan, W. Huixiang, Wang Zhenyu, W. Yuting, X. Qian, Wang Gang, Li Chuan, Ding Yulong, Ma Chongfang
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引用次数: 0

摘要

在熔盐中加入纳米材料可以显著改善熔盐的热性能。为了探究其增强机理,本研究采用常用的水溶液法,以二元碳酸盐为基盐,以20 nm SiO2和20 nm MgO纳米颗粒为添加剂制备碳酸盐岩纳米流体。然后,通过差示扫描量热法、热重法、激光闪蒸法和微形貌分析对碳酸盐纳米流体的关键性能和微观形貌进行了表征。结果表明:20 nm SiO2纳米材料比20 nm MgO纳米材料对碳酸盐的潜热有更高的影响,20 nm MgO纳米材料比20 nm SiO2纳米材料对碳酸盐的感热、导热性和高温稳定性有更高的影响。此外,在sio2基和mgo基熔盐纳米流体中分别观察到不同的纳米结构。创新性地提出了基于云核的熔盐纳米流体的形成机制,以解释本工作中不同的增强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Insights into the Enhancement Mechanisms of Molten Salt Nanofluids
The addition of nanomaterials to molten salts can significantly improve their thermal performance. To explore the enhancement mechanisms, this work prepared carbonate salt nanofluids with binary carbonate as base salt and 20 nm SiO2 and 20 nm MgO nanoparticles as additives by the commonly used aqueous solution method. Then, the key performance and micromorphology of the carbonate salt nanofluids are characterized by differential scanning calorimetry, thermal gravimetric analysis, laser flash analysis, and micromorphology analysis. Results showed that the 20 nm SiO2 nanomaterials instead of the 20 nm MgO nanomaterials exerted higher effects on latent heat while the 20 nm MgO nanomaterials instead of the 20 nm SiO2 nanomaterials exerted higher effects on the sensible heat, thermal conductivity, and high-temperature stability of carbonated salt. In addition, different nanostructures were observed in SiO2-based and MgO-based molten salt nanofluids, respectively. Innovatively, formation mechanisms of molten salt nanofluids were proposed based on cloud nuclei to explain the different enhancements in this work.
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来源期刊
CiteScore
6.00
自引率
3.10%
发文量
128
审稿时长
3.6 months
期刊介绍: International Journal of Photoenergy is a peer-reviewed, open access journal that publishes original research articles as well as review articles in all areas of photoenergy. The journal consolidates research activities in photochemistry and solar energy utilization into a single and unique forum for discussing and sharing knowledge. The journal covers the following topics and applications: - Photocatalysis - Photostability and Toxicity of Drugs and UV-Photoprotection - Solar Energy - Artificial Light Harvesting Systems - Photomedicine - Photo Nanosystems - Nano Tools for Solar Energy and Photochemistry - Solar Chemistry - Photochromism - Organic Light-Emitting Diodes - PV Systems - Nano Structured Solar Cells
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