Optimal Design Of The Concentric Annulus For The Solar Collectors And Energy Storage
Heat exchangers with uniform heating ensure even heat distribution, improving heat transfer efficiency and lowering thermal stress. It contributes to increasing the effectiveness of solar energy conversion into thermal energy in solar collectors, improving system performance and sustainability. It...
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| Format: | Article |
| Language: | English |
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Wasit University
2024-08-01
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| Series: | Wasit Journal of Engineering Sciences |
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| Online Access: | https://ejuow.uowasit.edu.iq/index.php/ejuow/article/view/570 |
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| author | Amina Hmoud Alikhan Khaleel Saleem Jebur Al-Ogaili Hadi Obaid Mery Osamah Malik Mohammed Mohammed Arkan Al-attabbi |
| author_facet | Amina Hmoud Alikhan Khaleel Saleem Jebur Al-Ogaili Hadi Obaid Mery Osamah Malik Mohammed Mohammed Arkan Al-attabbi |
| author_sort | Amina Hmoud Alikhan |
| collection | DOAJ |
| description |
Heat exchangers with uniform heating ensure even heat distribution, improving heat transfer efficiency and lowering thermal stress. It contributes to increasing the effectiveness of solar energy conversion into thermal energy in solar collectors, improving system performance and sustainability. It is essential for enhancing performance in both home and industrial applications because of these advantages. An experimental investigation was conducted to study the natural convective flow between two isothermal concentric cylinders filled with porous media (silica sand) and equipped with annular fins attached to the inner cylinder. The fins varied in length (Hf = 3, 7, and 11 mm), and the radius ratios (Rr) between the cylinders were also considered during the study. This work examines and discusses the effects of independent characteristics, such as fin height (Hf), radius ratio (Rr), and Rayleigh number (Ra) from 10 to 500, on heat transfer outcomes. As the distance between the two cylinders expands, the average Nu remains relatively constant for low values of Ra. However, as Ra approaches 100, the average Nu increases. These values also rose when Rr decreased for the hot cylinder and vice versa for the cold cylinder. The average Nusselt number versus Ra was analyzed in graphical form to show the effect of the fin number on the average Nusselt number. The analysis includes a range of fin numbers. It is found that as the amount of fins increases from n = 12 to n = 23 and eventually to n = 45, there is a decrease in the average Nusselt number. The decrease in average Nusselt number can range from 19.2% to 26.6% for the same value of Ra.
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| format | Article |
| id | doaj-art-fe3f3517d6a4475a9b16e8af930fc32d |
| institution | Kabale University |
| issn | 2305-6932 2663-1970 |
| language | English |
| publishDate | 2024-08-01 |
| publisher | Wasit University |
| record_format | Article |
| series | Wasit Journal of Engineering Sciences |
| spelling | doaj-art-fe3f3517d6a4475a9b16e8af930fc32d2025-08-20T03:45:38ZengWasit UniversityWasit Journal of Engineering Sciences2305-69322663-19702024-08-0112310.31185/ejuow.Vol12.Iss3.570Optimal Design Of The Concentric Annulus For The Solar Collectors And Energy StorageAmina Hmoud Alikhan0Khaleel Saleem Jebur Al-OgailiHadi Obaid MeryOsamah Malik MohammedMohammed Arkan Al-attabbiWasit University Heat exchangers with uniform heating ensure even heat distribution, improving heat transfer efficiency and lowering thermal stress. It contributes to increasing the effectiveness of solar energy conversion into thermal energy in solar collectors, improving system performance and sustainability. It is essential for enhancing performance in both home and industrial applications because of these advantages. An experimental investigation was conducted to study the natural convective flow between two isothermal concentric cylinders filled with porous media (silica sand) and equipped with annular fins attached to the inner cylinder. The fins varied in length (Hf = 3, 7, and 11 mm), and the radius ratios (Rr) between the cylinders were also considered during the study. This work examines and discusses the effects of independent characteristics, such as fin height (Hf), radius ratio (Rr), and Rayleigh number (Ra) from 10 to 500, on heat transfer outcomes. As the distance between the two cylinders expands, the average Nu remains relatively constant for low values of Ra. However, as Ra approaches 100, the average Nu increases. These values also rose when Rr decreased for the hot cylinder and vice versa for the cold cylinder. The average Nusselt number versus Ra was analyzed in graphical form to show the effect of the fin number on the average Nusselt number. The analysis includes a range of fin numbers. It is found that as the amount of fins increases from n = 12 to n = 23 and eventually to n = 45, there is a decrease in the average Nusselt number. The decrease in average Nusselt number can range from 19.2% to 26.6% for the same value of Ra. https://ejuow.uowasit.edu.iq/index.php/ejuow/article/view/570Natural convective flow; isothermal concentric cylinders; Silica sand; Radius ratios; Heat transfer; Rayleigh number |
| spellingShingle | Amina Hmoud Alikhan Khaleel Saleem Jebur Al-Ogaili Hadi Obaid Mery Osamah Malik Mohammed Mohammed Arkan Al-attabbi Optimal Design Of The Concentric Annulus For The Solar Collectors And Energy Storage Wasit Journal of Engineering Sciences Natural convective flow; isothermal concentric cylinders; Silica sand; Radius ratios; Heat transfer; Rayleigh number |
| title | Optimal Design Of The Concentric Annulus For The Solar Collectors And Energy Storage |
| title_full | Optimal Design Of The Concentric Annulus For The Solar Collectors And Energy Storage |
| title_fullStr | Optimal Design Of The Concentric Annulus For The Solar Collectors And Energy Storage |
| title_full_unstemmed | Optimal Design Of The Concentric Annulus For The Solar Collectors And Energy Storage |
| title_short | Optimal Design Of The Concentric Annulus For The Solar Collectors And Energy Storage |
| title_sort | optimal design of the concentric annulus for the solar collectors and energy storage |
| topic | Natural convective flow; isothermal concentric cylinders; Silica sand; Radius ratios; Heat transfer; Rayleigh number |
| url | https://ejuow.uowasit.edu.iq/index.php/ejuow/article/view/570 |
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