Investigation of nanofluid molten salts in a thermocline tank as a thermal energy storage system

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Published: Aug 30, 2024
DOI: https://doi.org/10.14456/apst.2024.69
Keywords:
Quaternary molten salts Nanoparticle Nanofluid CSP Thermal efficiency

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Direk Nualsing
Department of Mechanical Engineering, Faculty of Engineering, Thammasat School of Engineering, Thammasat University, Pathumthani, Thailand
Nattadon Pannucharoenwong
Department of Mechanical Engineering, Faculty of Engineering, Thammasat School of Engineering, Thammasat University, Pathumthani, Thailand
Snunkhaem Echaroj
Department of Mechanical Engineering, Faculty of Engineering, Thammasat School of Engineering, Thammasat University, Pathumthani, Thailand
Keyoon Duanguppama
Department of Mechanical Engineering, Faculty of Engineering and Industrial Technology, Kalasin University, Kalasin, Thailand
Phadungsak Rattanadecho
Department of Mechanical Engineering, Faculty of Engineering, Thammasat School of Engineering, Thammasat University, Pathumthani, Thailand

Abstract

Nanoparticles were prepared and incorporated into molten salts to form a nanofluid system for use in a concentrated solar powerplant (CSP). Particle sizes of both the nanoparticles and incorporated molten salts were analyzed from images captured by scanning electron microscopy using image processing software. The heat transfer fluid was prepared via a two-step method by blending four molten salts (KNO3, NaNO3, LiNO3, and Ca(NO3)2.4H2O) and anodic aluminum oxide (AAO) at 180°C for 360 minutes. Results showed that after the anodization process, aluminum A5052 transformed the film surface into metal oxide (anodic aluminum oxide) with particle size smaller than 56.3 nm. Incorporation of aluminum nanoparticles into the molten salt matrix increased particle size to 100 nm due to the chemisorption of molten salt by hydroxide functional groups on the AAO surface during the heat transfer process. Addition of AAO improved the discharge power provided by the upright thermocline tank.

Article Details

How to Cite
Nualsing, D., Pannucharoenwong, N., Echaroj, S., Duanguppama, K., & Rattanadecho, P. (2024). Investigation of nanofluid molten salts in a thermocline tank as a thermal energy storage system. Asia-Pacific Journal of Science and Technology, 29(05), APST–29. https://doi.org/10.14456/apst.2024.69
Issue
Vol. 29 No. 05 (2024): SEP-OCT
Section
Research Articles
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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