Modeling and simulation of seasonal performance of silica-polymethylpentene for diurnal radiative cooling under direct sunlight
Passive radiative cooling presents a smart alternative energy solution to the increasing demand for energy, especially for thermal comfort, as it requires energy input while being environmentally friendly. Achieving cooling through radiation is, however, material dependent. This study investigates t...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2025-01-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0216838 |
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| author | G. N. Nwaji C. R. Oraka H. O. Okoro A. C. Okoronkwo N. V. Ogueke E. E. Anyanwu |
| author_facet | G. N. Nwaji C. R. Oraka H. O. Okoro A. C. Okoronkwo N. V. Ogueke E. E. Anyanwu |
| author_sort | G. N. Nwaji |
| collection | DOAJ |
| description | Passive radiative cooling presents a smart alternative energy solution to the increasing demand for energy, especially for thermal comfort, as it requires energy input while being environmentally friendly. Achieving cooling through radiation is, however, material dependent. This study investigates the seasonal performance of a radiative cooling arrangement for all-year cooling. A 2D mathematical model of a diurnal radiative cooler was developed from first principles based on thermal energy balance and was parameterized using the climatic data of Owerri, Nigeria, to evaluate the thermal performance of the cooler during the late Harmattan (January), early rainy (April), late rainy (September), and early Harmattan (November) seasons in the study location. The months so chosen and their peculiar climatic characteristics are representative of the four seasons that characterize the study location. The system showed appreciable cooling under direct sunlight in all the months, indicating that diurnal passive radiative cooling is feasible all year round. Sub-ambient temperature values of 5, 3, 3.4, and 5 °C were recorded for the months of January, April, September, and November, under solar irradiance of 1250, 1150, 950, and 1200 W/m2 and cooling powers of 94, 107, 84, and 96 W/m2, respectively. |
| format | Article |
| id | doaj-art-99fb97dff7f540f5896039b2205ceebc |
| institution | Kabale University |
| issn | 2158-3226 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj-art-99fb97dff7f540f5896039b2205ceebc2025-02-03T16:40:43ZengAIP Publishing LLCAIP Advances2158-32262025-01-01151015310015310-1010.1063/5.0216838Modeling and simulation of seasonal performance of silica-polymethylpentene for diurnal radiative cooling under direct sunlightG. N. Nwaji0C. R. Oraka1H. O. Okoro2A. C. Okoronkwo3N. V. Ogueke4E. E. Anyanwu5Department of Mechanical Engineering, School of Engineering and Engineering Technology, Federal University of Technology, P.M.B. 1526, Owerri, Imo State, NigeriaDepartment of Mechanical Engineering, School of Engineering and Engineering Technology, Federal University of Technology, P.M.B. 1526, Owerri, Imo State, NigeriaDepartment of Mechanical Engineering, Akanu Ibiam Federal Polytechnic, Unwana, Afikpo, Ebonyi State, NigeriaDepartment of Mechatronic Engineering, School of Electrical Systems Engineering, Federal University of Technology, P.M.B. 1526, Owerri, Imo State, NigeriaAfrican Center of Excellence on Future Energies and Electrochemical Systems (ACE-FUELS), Federal University of Technology, P.M.B. 1526, Owerri, Imo State, NigeriaDepartment of Mechanical Engineering, School of Engineering and Engineering Technology, Federal University of Technology, P.M.B. 1526, Owerri, Imo State, NigeriaPassive radiative cooling presents a smart alternative energy solution to the increasing demand for energy, especially for thermal comfort, as it requires energy input while being environmentally friendly. Achieving cooling through radiation is, however, material dependent. This study investigates the seasonal performance of a radiative cooling arrangement for all-year cooling. A 2D mathematical model of a diurnal radiative cooler was developed from first principles based on thermal energy balance and was parameterized using the climatic data of Owerri, Nigeria, to evaluate the thermal performance of the cooler during the late Harmattan (January), early rainy (April), late rainy (September), and early Harmattan (November) seasons in the study location. The months so chosen and their peculiar climatic characteristics are representative of the four seasons that characterize the study location. The system showed appreciable cooling under direct sunlight in all the months, indicating that diurnal passive radiative cooling is feasible all year round. Sub-ambient temperature values of 5, 3, 3.4, and 5 °C were recorded for the months of January, April, September, and November, under solar irradiance of 1250, 1150, 950, and 1200 W/m2 and cooling powers of 94, 107, 84, and 96 W/m2, respectively.http://dx.doi.org/10.1063/5.0216838 |
| spellingShingle | G. N. Nwaji C. R. Oraka H. O. Okoro A. C. Okoronkwo N. V. Ogueke E. E. Anyanwu Modeling and simulation of seasonal performance of silica-polymethylpentene for diurnal radiative cooling under direct sunlight AIP Advances |
| title | Modeling and simulation of seasonal performance of silica-polymethylpentene for diurnal radiative cooling under direct sunlight |
| title_full | Modeling and simulation of seasonal performance of silica-polymethylpentene for diurnal radiative cooling under direct sunlight |
| title_fullStr | Modeling and simulation of seasonal performance of silica-polymethylpentene for diurnal radiative cooling under direct sunlight |
| title_full_unstemmed | Modeling and simulation of seasonal performance of silica-polymethylpentene for diurnal radiative cooling under direct sunlight |
| title_short | Modeling and simulation of seasonal performance of silica-polymethylpentene for diurnal radiative cooling under direct sunlight |
| title_sort | modeling and simulation of seasonal performance of silica polymethylpentene for diurnal radiative cooling under direct sunlight |
| url | http://dx.doi.org/10.1063/5.0216838 |
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