Simulation of a top-heat-type thermosyphon-based flow stabilization system
Addressing the problem of global warming requires reducing greenhouse gas emissions; thus, considerable efforts are being made to effectively utilize renewable energy. Currently, the conversion efficiency of photovoltaic (PV) panels is approximately 20%, whereas the conversion efficiency of the sola...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722023071 |
| _version_ | 1797952149508849664 |
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| author | Kenichiro Maruyama Toru Fujisawa Takeshi Kawashima |
| author_facet | Kenichiro Maruyama Toru Fujisawa Takeshi Kawashima |
| author_sort | Kenichiro Maruyama |
| collection | DOAJ |
| description | Addressing the problem of global warming requires reducing greenhouse gas emissions; thus, considerable efforts are being made to effectively utilize renewable energy. Currently, the conversion efficiency of photovoltaic (PV) panels is approximately 20%, whereas the conversion efficiency of the solar collector exceeds 40%. Therefore, generating hot water with a solar collector is more efficient and cost-effective than using PV panels. Under these circumstances, the effectiveness of a control system in top-heat-type thermosyphon systems to convert the intermittent flow of the circulating working fluid to continuous flow has been established through both indoor and outdoor testing. In this study, a model of the experimental setup involving the top-heat-type thermosyphon is developed, and numerical simulation is performed to investigate the effects of circulating working fluid pressure and pipe friction on intermittent flow. Moreover, the simulation results are compared with those of the experiment with pressure changes. According to the findings, intermittent flow occurs when there is large pipe friction and high pressure. These results attest to the efficacy of the proposed working fluid stabilizing technique. |
| first_indexed | 2024-04-10T22:41:45Z |
| format | Article |
| id | doaj.art-79e6c9825a24403e822af2261ecd28d1 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T22:41:45Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-79e6c9825a24403e822af2261ecd28d12023-01-16T04:08:46ZengElsevierEnergy Reports2352-48472022-11-01810291036Simulation of a top-heat-type thermosyphon-based flow stabilization systemKenichiro Maruyama0Toru Fujisawa1Takeshi Kawashima2Mechanical Engineering Course, Graduate School of Engineering, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, JapanDepartment of Vehicle System Engineering, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, 243-0292, JapanDepartment of Mechanical Engineering, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, 243-0292, Japan; Corresponding author.Addressing the problem of global warming requires reducing greenhouse gas emissions; thus, considerable efforts are being made to effectively utilize renewable energy. Currently, the conversion efficiency of photovoltaic (PV) panels is approximately 20%, whereas the conversion efficiency of the solar collector exceeds 40%. Therefore, generating hot water with a solar collector is more efficient and cost-effective than using PV panels. Under these circumstances, the effectiveness of a control system in top-heat-type thermosyphon systems to convert the intermittent flow of the circulating working fluid to continuous flow has been established through both indoor and outdoor testing. In this study, a model of the experimental setup involving the top-heat-type thermosyphon is developed, and numerical simulation is performed to investigate the effects of circulating working fluid pressure and pipe friction on intermittent flow. Moreover, the simulation results are compared with those of the experiment with pressure changes. According to the findings, intermittent flow occurs when there is large pipe friction and high pressure. These results attest to the efficacy of the proposed working fluid stabilizing technique.http://www.sciencedirect.com/science/article/pii/S2352484722023071Renewable energySolar thermalSolar thermosyphonTop heat typeLow temperature heatFlow stabilization |
| spellingShingle | Kenichiro Maruyama Toru Fujisawa Takeshi Kawashima Simulation of a top-heat-type thermosyphon-based flow stabilization system Energy Reports Renewable energy Solar thermal Solar thermosyphon Top heat type Low temperature heat Flow stabilization |
| title | Simulation of a top-heat-type thermosyphon-based flow stabilization system |
| title_full | Simulation of a top-heat-type thermosyphon-based flow stabilization system |
| title_fullStr | Simulation of a top-heat-type thermosyphon-based flow stabilization system |
| title_full_unstemmed | Simulation of a top-heat-type thermosyphon-based flow stabilization system |
| title_short | Simulation of a top-heat-type thermosyphon-based flow stabilization system |
| title_sort | simulation of a top heat type thermosyphon based flow stabilization system |
| topic | Renewable energy Solar thermal Solar thermosyphon Top heat type Low temperature heat Flow stabilization |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722023071 |
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