Melting enhancement in vertical triplex-tube latent heat thermal energy storage system using BeO nanoparticles and internal fins
This study presents the application of internal fins and beryllium oxide (BeO) nanoparticles to accelerate the melting of lithium chloride as a phase change material (PCM) encapsulated in a latent heat thermal energy storage unit which is an intermediate element in a nuclear power plant's assis...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025000453 |
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| Summary: | This study presents the application of internal fins and beryllium oxide (BeO) nanoparticles to accelerate the melting of lithium chloride as a phase change material (PCM) encapsulated in a latent heat thermal energy storage unit which is an intermediate element in a nuclear power plant's assisted thermal energy systems. The transient melting behavior of PCM is numerically investigated in 2D planar geometries using the enthalpy-porosity model. A particular effect of fins, BeO nanoparticles, and a combination of both at different volume fractions on melting performance is analyzed. The thermal conductivity of PCM is enhanced by around 15 % for both liquid and solid phases at a 5 % volume fraction of BeO nanoparticles. Employment of 2, 4, and 6 fins is seen to improve melting time by 30.6 %, 44.4 %, and 52.8 %, respectively, as compared to a base case. Simulation results also have shown that adding 1 %, 3 %, and 5 % BeO nanoparticles by volume in the PCM reduced the melting time by 2.8 %, 7.2 %, and 12.2 %, respectively, relating to the base case. Adding 5 % BeO nanoparticles by volume in the PCM results in a melting time decrease of 38.9 %, 51.1 %, and 58.3 % taking pure PCM case as the reference, respectively, for 2, 4, and 6 finned cases. Analysis of simulation results revealed that the effect of fins on melting time at a 5 % volume fraction of BeO nanoparticles weakens as the fin number increases. Comparative analysis has shown that adding BeO nanoparticles demonstrates melting acceleration by 4.3 % compared to Al2O3 nanoparticles. |
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| ISSN: | 2590-1230 |