Efficient heat extraction from the storage zone of solar pond by structurally improved spiral pipes; numerical simulation/experimental validation
Various semi-O/O-shape dimple patterns were applied on the flat spiral pipes as a regional contorting policy. In this method only the critical regions that may cause significant effect on the improvement of the hydrothermal performance can be subjected to structural modification. The all-round geome...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Energy Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722010927 |
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| author | Mehran Hashemian Samad Jafarmadar M.A. El-Shorbagy Anas A. Rahman Mahidzal Dahari Makatar Wae-hayee |
| author_facet | Mehran Hashemian Samad Jafarmadar M.A. El-Shorbagy Anas A. Rahman Mahidzal Dahari Makatar Wae-hayee |
| author_sort | Mehran Hashemian |
| collection | DOAJ |
| description | Various semi-O/O-shape dimple patterns were applied on the flat spiral pipes as a regional contorting policy. In this method only the critical regions that may cause significant effect on the improvement of the hydrothermal performance can be subjected to structural modification. The all-round geometrical modifications causes excessive pressure drop while this method can solve this problem to some extent. Archimedean spiral geometry of spiral pipe makes uneven hydraulic-thermal characteristics along the pipe, so regional geometrical modification allows to pinpoint the optimal model. Using semi-O or O-shape dimples or combination of both on the inner or outer (or on both wall) leads to obtain unique cases. Constant wall temperature of 360 K was applied for the outer wall of all cases to evaluate the strength of each case based on heat extraction potential. The effect of arrangement, position, and type of dimples was taken under consideration. To get elaborate comprehension about the frictional and thermal behavior of each design, several criteria including Nusselt number (Nu), friction factor (f), thermal performance factor (TPF), temperature efficiency (ɛ), and J-factor were employed. Moreover, the effect of flow inlet position on the said was explored. All investigations were done in the flow velocity range of 0.1–0.6 m/s. The findings showed that case “c” (spiral pipe with dimples on the inner wall) has the highest heat extraction potential and improves heat extraction by 27% compared to the smooth spiral pipe. Also, case “c” makes the lowest pressure drop. Hence, by owning said two positive features case “c” provided the highest TPF, ɛ, and J-factor. Heat transfer improves when flow enters from the innermost turn. |
| first_indexed | 2024-04-10T09:10:11Z |
| format | Article |
| id | doaj.art-a9e4c14c8c524de1a92dc14396000316 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T09:10:11Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-a9e4c14c8c524de1a92dc143960003162023-02-21T05:11:49ZengElsevierEnergy Reports2352-48472022-11-01873867400Efficient heat extraction from the storage zone of solar pond by structurally improved spiral pipes; numerical simulation/experimental validationMehran Hashemian0Samad Jafarmadar1M.A. El-Shorbagy2Anas A. Rahman3Mahidzal Dahari4Makatar Wae-hayee5Department of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, Iran; Corresponding authors.Department of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, Iran; Corresponding authors.Department of Mathematics, College of Science and Humanities in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; Department of Basic Engineering Science, Faculty of Engineering, Menoufia University, Shebin El-Kom 32511, EgyptMechanical Engineering Department, Faculty of Engineering and Technology, Future University in Egypt, New Cairo 11845, EgyptDepartment of Electrical Engineering, Faculty of Engineering, University Malaya, 50603, Kuala Lumpur, MalaysiaDepartment of Mechanical and Mechatronics Engineering, Faculty of Engineering, Prince of Songkla University, Hatyai, Songkhla, 90110, Thailand; Corresponding authors.Various semi-O/O-shape dimple patterns were applied on the flat spiral pipes as a regional contorting policy. In this method only the critical regions that may cause significant effect on the improvement of the hydrothermal performance can be subjected to structural modification. The all-round geometrical modifications causes excessive pressure drop while this method can solve this problem to some extent. Archimedean spiral geometry of spiral pipe makes uneven hydraulic-thermal characteristics along the pipe, so regional geometrical modification allows to pinpoint the optimal model. Using semi-O or O-shape dimples or combination of both on the inner or outer (or on both wall) leads to obtain unique cases. Constant wall temperature of 360 K was applied for the outer wall of all cases to evaluate the strength of each case based on heat extraction potential. The effect of arrangement, position, and type of dimples was taken under consideration. To get elaborate comprehension about the frictional and thermal behavior of each design, several criteria including Nusselt number (Nu), friction factor (f), thermal performance factor (TPF), temperature efficiency (ɛ), and J-factor were employed. Moreover, the effect of flow inlet position on the said was explored. All investigations were done in the flow velocity range of 0.1–0.6 m/s. The findings showed that case “c” (spiral pipe with dimples on the inner wall) has the highest heat extraction potential and improves heat extraction by 27% compared to the smooth spiral pipe. Also, case “c” makes the lowest pressure drop. Hence, by owning said two positive features case “c” provided the highest TPF, ɛ, and J-factor. Heat transfer improves when flow enters from the innermost turn.http://www.sciencedirect.com/science/article/pii/S2352484722010927Heat extraction rateSolar pondFriction factorThermal performance factor (TPF)Spiral pipeDimple |
| spellingShingle | Mehran Hashemian Samad Jafarmadar M.A. El-Shorbagy Anas A. Rahman Mahidzal Dahari Makatar Wae-hayee Efficient heat extraction from the storage zone of solar pond by structurally improved spiral pipes; numerical simulation/experimental validation Energy Reports Heat extraction rate Solar pond Friction factor Thermal performance factor (TPF) Spiral pipe Dimple |
| title | Efficient heat extraction from the storage zone of solar pond by structurally improved spiral pipes; numerical simulation/experimental validation |
| title_full | Efficient heat extraction from the storage zone of solar pond by structurally improved spiral pipes; numerical simulation/experimental validation |
| title_fullStr | Efficient heat extraction from the storage zone of solar pond by structurally improved spiral pipes; numerical simulation/experimental validation |
| title_full_unstemmed | Efficient heat extraction from the storage zone of solar pond by structurally improved spiral pipes; numerical simulation/experimental validation |
| title_short | Efficient heat extraction from the storage zone of solar pond by structurally improved spiral pipes; numerical simulation/experimental validation |
| title_sort | efficient heat extraction from the storage zone of solar pond by structurally improved spiral pipes numerical simulation experimental validation |
| topic | Heat extraction rate Solar pond Friction factor Thermal performance factor (TPF) Spiral pipe Dimple |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722010927 |
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