Mechanism study on the synergistic coupling of the double-dish solar latent heat storage system to enhance heat transfer
With the rapid advance of the global economy, latent heat storage (LHS) is critical to solar thermal utilization. In this study, a double-dish solar Stirling LHS power generation system was designed. The heat transfer performance of the thermal storage system was improved by using the gradient tree-...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722026324 |
| _version_ | 1797781916282257408 |
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| author | Xinyu Zhang Xiaohong Yang Yannan Zhang Jiakun Xu Xiao Guo |
| author_facet | Xinyu Zhang Xiaohong Yang Yannan Zhang Jiakun Xu Xiao Guo |
| author_sort | Xinyu Zhang |
| collection | DOAJ |
| description | With the rapid advance of the global economy, latent heat storage (LHS) is critical to solar thermal utilization. In this study, a double-dish solar Stirling LHS power generation system was designed. The heat transfer performance of the thermal storage system was improved by using the gradient tree-shaped fins and adding graphene nanoparticles to paraffin. Two-dimensional numerical models of three thermal storage systems were developed to study the effects of natural convection and graphene nanoparticle concentration on the melting characteristics of paraffin. From the perspective of field synergy, the coupling effect of fin structure and graphene nanoparticle concentration on the heat transfer process was analyzed. The results show that natural convection exerts an important role in the heat transfer characteristics of paraffin melting. Compared with the six-longitudinal and snowflake fin structures, the gradient tree-shaped fin structure shows a 52.13% and 27.73% reduction in the complete melting time and a 52.16% and 9.53% increase in thermal storage efficiency. Little variation is observed in the liquid phase rate and the average temperature of the composite phase change materials (PCMs) with different concentrations of graphene nanoparticles. The total thermal storage capacity of composite PCMs is higher than that of pure paraffin. The synergistic coupling of gradient tree-shaped fin arrangement and graphene nanoparticles added in paraffin can enhance heat transfer. |
| first_indexed | 2024-03-13T00:03:42Z |
| format | Article |
| id | doaj.art-39a64e60c043456996e5dcf51b36f7d3 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-03-13T00:03:42Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-39a64e60c043456996e5dcf51b36f7d32023-07-13T05:28:47ZengElsevierEnergy Reports2352-48472023-12-019730741Mechanism study on the synergistic coupling of the double-dish solar latent heat storage system to enhance heat transferXinyu Zhang0Xiaohong Yang1Yannan Zhang2Jiakun Xu3Xiao Guo4School of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaSchool of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; Key Laboratory of Wind and Solar Energy Utilization Technology, Ministry of Education, Hohhot 010051, China; Corresponding author at: School of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China.School of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaSchool of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaSchool of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; Inner Mongolia Key Laboratory of Renewable Energy, Hohhot 010051, ChinaWith the rapid advance of the global economy, latent heat storage (LHS) is critical to solar thermal utilization. In this study, a double-dish solar Stirling LHS power generation system was designed. The heat transfer performance of the thermal storage system was improved by using the gradient tree-shaped fins and adding graphene nanoparticles to paraffin. Two-dimensional numerical models of three thermal storage systems were developed to study the effects of natural convection and graphene nanoparticle concentration on the melting characteristics of paraffin. From the perspective of field synergy, the coupling effect of fin structure and graphene nanoparticle concentration on the heat transfer process was analyzed. The results show that natural convection exerts an important role in the heat transfer characteristics of paraffin melting. Compared with the six-longitudinal and snowflake fin structures, the gradient tree-shaped fin structure shows a 52.13% and 27.73% reduction in the complete melting time and a 52.16% and 9.53% increase in thermal storage efficiency. Little variation is observed in the liquid phase rate and the average temperature of the composite phase change materials (PCMs) with different concentrations of graphene nanoparticles. The total thermal storage capacity of composite PCMs is higher than that of pure paraffin. The synergistic coupling of gradient tree-shaped fin arrangement and graphene nanoparticles added in paraffin can enhance heat transfer.http://www.sciencedirect.com/science/article/pii/S2352484722026324Solar energyLatent heat storageGradient finsHeat storage and releaseHeat transferField synergy |
| spellingShingle | Xinyu Zhang Xiaohong Yang Yannan Zhang Jiakun Xu Xiao Guo Mechanism study on the synergistic coupling of the double-dish solar latent heat storage system to enhance heat transfer Energy Reports Solar energy Latent heat storage Gradient fins Heat storage and release Heat transfer Field synergy |
| title | Mechanism study on the synergistic coupling of the double-dish solar latent heat storage system to enhance heat transfer |
| title_full | Mechanism study on the synergistic coupling of the double-dish solar latent heat storage system to enhance heat transfer |
| title_fullStr | Mechanism study on the synergistic coupling of the double-dish solar latent heat storage system to enhance heat transfer |
| title_full_unstemmed | Mechanism study on the synergistic coupling of the double-dish solar latent heat storage system to enhance heat transfer |
| title_short | Mechanism study on the synergistic coupling of the double-dish solar latent heat storage system to enhance heat transfer |
| title_sort | mechanism study on the synergistic coupling of the double dish solar latent heat storage system to enhance heat transfer |
| topic | Solar energy Latent heat storage Gradient fins Heat storage and release Heat transfer Field synergy |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722026324 |
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