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Experimental and theoretical investigation of an innovative composite nanofluid for solar energy photothermal conversion and storage
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- Rong, Z. (author)
- Sun Yat-Sen University, Guangzhou, China,Sun Yat Sen Univ, Sch Mat Sci & Engn, Guangzhou 510006, Peoples R China.;Sun Yat Sen Univ, Sch Intelligent Syst Engn, Guangzhou 510006, Peoples R China.
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- Ding, J. (author)
- Sun Yat-Sen University, Guangzhou, China,Sun Yat Sen Univ, Sch Mat Sci & Engn, Guangzhou 510006, Peoples R China.
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- Lu, J. (author)
- Sun Yat-Sen University, Guangzhou, China,Sun Yat Sen Univ, Sch Mat Sci & Engn, Guangzhou 510006, Peoples R China.
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- Sun Yat-Sen University, Guangzhou, China Sun Yat Sen Univ, Sch Mat Sci & Engn, Guangzhou 510006, Peoples R China;Sun Yat Sen Univ, Sch Intelligent Syst Engn, Guangzhou 510006, Peoples R China. (creator_code:org_t)
- Elsevier Ltd, 2022
- 2022
- English.
- In: Journal of Energy Storage. - : Elsevier Ltd. - 2352-152X .- 2352-1538. ; 52
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Molten salts play a key role in the heat transfer and thermal energy storage processes of concentrated solar power plants. A novel composite material was prepared in this work by adding micron-sized magnesium particles into Li2CO3-Na2CO3-K2CO3 molten salt, the heat transfer and thermal energy storage properties of the composites were studied experimentally. A stable composite nanofluid can be obtained, and a thermal conductivity of 0.728 W/(m·K) at 973 K with an enhancement of 31% is achieved for the Mg/molten carbonate nanofluid. And the strengthening mechanism of thermal conductivity was revealed by using ab-initio molecular dynamics method. It is found that the main bonding interactions exist between Mg and O atoms at the surface of Mg particles. A compressed ion layer with a more compact and ordered ionic structure is formed around Mg particles, and the Brownian motions of Mg particles lead to the micro-convections of carbonate ions around them. These factors are helpful to the enhancement of thermal conduction with the improved probability and frequency of ion collisions. This work can provide a guidance for further studies and applications on metal/molten salt composites with enhanced heat transfer and thermal energy storage capacity.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Energisystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Energy Systems (hsv//eng)
Keyword
- Ab-initio molecular dynamics
- Compressed ion layer
- Heat transfer and storage
- Mg/molten carbonate nanofluid
- Thermal conductivity
- Brownian movement
- Carbonation
- Fused salts
- Heat storage
- Heat transfer
- Ions
- Lithium compounds
- Magnesium compounds
- Molecular dynamics
- Potash
- Sodium Carbonate
- Solar energy
- Solar power plants
- Storage (materials)
- Thermal energy
- Ab initio molecular dynamics
- Experimental investigations
- Ion layers
- Molten carbonate
- Molten salt
- Nanofluids
- Theoretical investigations
- Thermal energy storage
- Nanofluidics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Mälardalen University
- Royal Institute of Technology
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