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Experimental investigations of thermal and flow characteristics of a novel microjet air solar heater

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  • Zukowski, M.

Abstract

Air solar heaters have more and more applications in many areas, including the building sector, food industry, and agricultural sector. This paper presents a novel construction of a forced air solar heater based on a confined single slot jet of air impinging on the flat surface of an absorber plate. The heat exchanger structure comprises two parallel air ducts (a supply channel and a return channel) in the shape of a triangular prism that are physically separated from one another. Results of experimental research showed that the efficiency of energy conversion ranged from 66% up to 90%. A comparison of results of thermal-flow performance of different types of air solar heaters, including the newly-developed heat exchanger indicated that the tested device can compete with the best commercially available solutions. It was found that the single glass covering significantly improves the efficiency of solar energy conversion from 16% up to 24%. As it turned out, the pressure losses associated with air passing through the device under test were the lowest of five selected solar air heaters.

Suggested Citation

  • Zukowski, M., 2015. "Experimental investigations of thermal and flow characteristics of a novel microjet air solar heater," Applied Energy, Elsevier, vol. 142(C), pages 10-20.
    • Handle: RePEc:eee:appene:v:142:y:2015:i:c:p:10-20
    DOI: 10.1016/j.apenergy.2014.12.052
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    References listed on IDEAS

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    Cited by:

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    2. Chauhan, Ranchan & Singh, Tej & Thakur, N.S. & Kumar, Nitin & Kumar, Raj & Kumar, Anil, 2018. "Heat transfer augmentation in solar thermal collectors using impinging air jets: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3179-3190.
    3. Chaurasiya, Shailendra Kumar & Singh, Satyender, 2023. "High thermal performance of the solar air heater designs triggered by improved jet stability," Renewable Energy, Elsevier, vol. 204(C), pages 532-545.
    4. Hu, Mingke & Pei, Gang & Wang, Qiliang & Li, Jing & Wang, Yunyun & Ji, Jie, 2016. "Field test and preliminary analysis of a combined diurnal solar heating and nocturnal radiative cooling system," Applied Energy, Elsevier, vol. 179(C), pages 899-908.
    5. Jan Wajs & Michał Bajor & Dariusz Mikielewicz, 2019. "Thermal-Hydraulic Studies on the Shell-and-Tube Heat Exchanger with Minijets," Energies, MDPI, vol. 12(17), pages 1-12, August.
    6. Hassan, Hamdy & Abo-Elfadl, Saleh & El-Dosoky, M.F., 2020. "An experimental investigation of the performance of new design of solar air heater (tubular)," Renewable Energy, Elsevier, vol. 151(C), pages 1055-1066.
    7. Kareem, M.W. & Habib, Khairul & Pasha, Amjad A. & Irshad, Kashif & Afolabi, L.O. & Saha, Bidyut Baran, 2022. "Experimental study of multi-pass solar air thermal collector system assisted with sensible energy-storing matrix," Energy, Elsevier, vol. 245(C).
    8. Abhishek Kumar Goel & S. N. Singh, 2020. "Experimental study of heat transfer characteristics of an impinging jet solar air heater with fins," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 22(4), pages 3641-3653, April.

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