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The improvement of collector efficiency in solar air heaters by simultaneously air flow over and under the absorbing plate

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  • Yeh, Ho-Ming
  • Ho, Chii-Dong
  • Hou, Jun-Ze

Abstract

The performance of double-flow type solar air heaters, in which air is flowing simultaneously over and under the absorbing plate, is more effective than that of the devices with only one flow channel over or under the absorbing plate because the heat-transfer area in double-flow systems is double. The effect of the fraction of mass flow rate in the upper or lower flow channel of a double-flow device on collector efficiencies, has also been investigated theoretically and experimentally. Considerable improvement in collector performance is obtained by employing a double-flow type solar air heater, instead of using a single-flow device, if the mass flow rates in both flow channels are kept the same.

Suggested Citation

  • Yeh, Ho-Ming & Ho, Chii-Dong & Hou, Jun-Ze, 1999. "The improvement of collector efficiency in solar air heaters by simultaneously air flow over and under the absorbing plate," Energy, Elsevier, vol. 24(10), pages 857-871.
    • Handle: RePEc:eee:energy:v:24:y:1999:i:10:p:857-871
    DOI: 10.1016/S0360-5442(99)00043-2
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    1. Verma, Ratna & Chandra, Ram & Garg, H.P., 1992. "Optimization of solar air heaters of different designs," Renewable Energy, Elsevier, vol. 2(4), pages 521-531.
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    Cited by:

    1. Sivakandhan, C. & Arjunan, T.V. & Matheswaran, M.M., 2020. "Thermohydraulic performance enhancement of a new hybrid duct solar air heater with inclined rib roughness," Renewable Energy, Elsevier, vol. 147(P1), pages 2345-2357.
    2. Yeh, H.-M. & Ho, C.-D. & Hou, J.-Z., 2002. "Collector efficiency of double-flow solar air heaters with fins attached," Energy, Elsevier, vol. 27(8), pages 715-727.
    3. Varun Pratap Singh & Siddharth Jain & Ashish Karn & Ashwani Kumar & Gaurav Dwivedi & Chandan Swaroop Meena & Nitesh Dutt & Aritra Ghosh, 2022. "Recent Developments and Advancements in Solar Air Heaters: A Detailed Review," Sustainability, MDPI, vol. 14(19), pages 1-55, September.
    4. Kumar, Amit & Akshayveer, & Singh, Ajeet Pratap & Singh, O.P., 2020. "Efficient designs of double-pass curved solar air heaters," Renewable Energy, Elsevier, vol. 160(C), pages 1105-1118.
    5. Karsli, Suleyman, 2007. "Performance analysis of new-design solar air collectors for drying applications," Renewable Energy, Elsevier, vol. 32(10), pages 1645-1660.
    6. Kasayapanand, N. & Kiatsiriroat, T., 2007. "Optimized mass flux ratio of double-flow solar air heater with EHD," Energy, Elsevier, vol. 32(8), pages 1343-1351.
    7. Fan, Wenke & Kokogiannakis, Georgios & Ma, Zhenjun & Cooper, Paul, 2017. "Development of a dynamic model for a hybrid photovoltaic thermal collector – Solar air heater with fins," Renewable Energy, Elsevier, vol. 101(C), pages 816-834.
    8. Dhiman, Prashant & Thakur, N.S. & Kumar, Anoop & Singh, Satyender, 2011. "An analytical model to predict the thermal performance of a novel parallel flow packed bed solar air heater," Applied Energy, Elsevier, vol. 88(6), pages 2157-2167, June.
    9. Sun, Wei & Ji, Jie & He, Wei, 2010. "Influence of channel depth on the performance of solar air heaters," Energy, Elsevier, vol. 35(10), pages 4201-4207.
    10. Alam, Tabish & Kim, Man-Hoe, 2017. "Performance improvement of double-pass solar air heater – A state of art of review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 79(C), pages 779-793.
    11. Sopian, K. & Alghoul, M.A. & Alfegi, Ebrahim M. & Sulaiman, M.Y. & Musa, E.A., 2009. "Evaluation of thermal efficiency of double-pass solar collector with porous–nonporous media," Renewable Energy, Elsevier, vol. 34(3), pages 640-645.
    12. Tchinda, Réné, 2009. "A review of the mathematical models for predicting solar air heaters systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(8), pages 1734-1759, October.
    13. Hedayatizadeh, Mahdi & Sarhaddi, Faramarz & Safavinejad, Ali & Ranjbar, Faramarz & Chaji, Hossein, 2016. "Exergy loss-based efficiency optimization of a double-pass/glazed v-corrugated plate solar air heater," Energy, Elsevier, vol. 94(C), pages 799-810.
    14. Singh, Satyender & Dhiman, Prashant, 2014. "Thermal and thermohydraulic performance evaluation of a novel type double pass packed bed solar air heater under external recycle using an analytical and RSM (response surface methodology) combined ap," Energy, Elsevier, vol. 72(C), pages 344-359.
    15. Ozgen, Filiz & Esen, Mehmet & Esen, Hikmet, 2009. "Experimental investigation of thermal performance of a double-flow solar air heater having aluminium cans," Renewable Energy, Elsevier, vol. 34(11), pages 2391-2398.
    16. Singh, Satyender & Dhiman, Prashant, 2016. "Thermal performance of double pass packed bed solar air heaters – A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 1010-1031.
    17. Ravi, Ravi Kant & Saini, Rajeshwer Prasad, 2016. "A review on different techniques used for performance enhancement of double pass solar air heaters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 56(C), pages 941-952.

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