Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling
A spectral selectivity surface for both solar heating and radiative cooling was proposed. It has a high spectral absorptivity (emissivity) in the solar radiation band and atmospheric window band (i.e., 0.2~3 μm and 8~13 μm), as well as a low absorptivity (emissivity) in other bands aside from the so...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2015/807875 |
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| author | Mingke Hu Gang Pei Lei Li Renchun Zheng Junfei Li Jie Ji |
| author_facet | Mingke Hu Gang Pei Lei Li Renchun Zheng Junfei Li Jie Ji |
| author_sort | Mingke Hu |
| collection | DOAJ |
| description | A spectral selectivity surface for both solar heating and radiative cooling was proposed. It has a high spectral absorptivity (emissivity) in the solar radiation band and atmospheric window band (i.e., 0.2~3 μm and 8~13 μm), as well as a low absorptivity (emissivity) in other bands aside from the solar radiation and atmospheric window wavelengths (i.e., 3~8 μm or above 13 μm). A type of composite surface sample was trial-manufactured combining titanium-based solar selective absorbing coating with polyethylene terephthalate (TPET). Sample tests showed that the TPET composite surface has clear spectral selectivity in the spectra of solar heating and radiation cooling wavelengths. The equilibrium temperatures of the TPET surface under different sky conditions or different inclination angles of surface were tested at both day and night. Numerical analysis and comparisons among the TPET composite surface and three other typical surfaces were also performed. These comparisons indicated that the TPET composite surface had a relative heat efficiency of 76.8% of that of the conventional solar heating surface and a relative temperature difference of 75.0% of that of the conventional radiative cooling surface, with little difference in cooling power. |
| format | Article |
| id | doaj-art-e38318d722c94a03b699c79643c1614d |
| institution | OA Journals |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-e38318d722c94a03b699c79643c1614d2025-08-20T02:21:21ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2015-01-01201510.1155/2015/807875807875Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative CoolingMingke Hu0Gang Pei1Lei Li2Renchun Zheng3Junfei Li4Jie Ji5Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, ChinaEastern Boiler Control CO., LTD., Shenzhen 518057, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, ChinaA spectral selectivity surface for both solar heating and radiative cooling was proposed. It has a high spectral absorptivity (emissivity) in the solar radiation band and atmospheric window band (i.e., 0.2~3 μm and 8~13 μm), as well as a low absorptivity (emissivity) in other bands aside from the solar radiation and atmospheric window wavelengths (i.e., 3~8 μm or above 13 μm). A type of composite surface sample was trial-manufactured combining titanium-based solar selective absorbing coating with polyethylene terephthalate (TPET). Sample tests showed that the TPET composite surface has clear spectral selectivity in the spectra of solar heating and radiation cooling wavelengths. The equilibrium temperatures of the TPET surface under different sky conditions or different inclination angles of surface were tested at both day and night. Numerical analysis and comparisons among the TPET composite surface and three other typical surfaces were also performed. These comparisons indicated that the TPET composite surface had a relative heat efficiency of 76.8% of that of the conventional solar heating surface and a relative temperature difference of 75.0% of that of the conventional radiative cooling surface, with little difference in cooling power.http://dx.doi.org/10.1155/2015/807875 |
| spellingShingle | Mingke Hu Gang Pei Lei Li Renchun Zheng Junfei Li Jie Ji Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling International Journal of Photoenergy |
| title | Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling |
| title_full | Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling |
| title_fullStr | Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling |
| title_full_unstemmed | Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling |
| title_short | Theoretical and Experimental Study of Spectral Selectivity Surface for Both Solar Heating and Radiative Cooling |
| title_sort | theoretical and experimental study of spectral selectivity surface for both solar heating and radiative cooling |
| url | http://dx.doi.org/10.1155/2015/807875 |
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