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Determination of the Convective Heat-Exchange Coefficient in Inner Channels of Light-Absorbing Heat-Exchange Panels of Flat-Plate Solar Water-Heating Collectors Based on the Results of Their Short-Term Thermal Testing in Full-Scale Conditions

  • Solar Power Plants and Their Application
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Abstract

The results of investigations to determine the convective heat-exchange coefficient in the inner heat-exchange channels (HECs) of the light-absorbing heat-exchange panels (LAHPs) of flat-plate solar water-heating collectors (FPSWHCs) are given based on the results of their short-term heat testing in fullscale quasi-stationary conditions. The research method is based on determining the value of the required parameter from the heat-balance equation formed for the inner surfaces of the LAHP HEC walls. The structures of the flow LAHPs with a sheet-piped and thin parallelepiped form are selected as the test objects. The thermal tests of the FPSWHC are carried out during the near-midday hours of the light day to ensure the quasi-stationary mode condition. The reliability of the proposed method and results of the investigations is proved by comparing the values of the thermal-efficiency coefficients of the FPSWHC LAHPs obtained using two independent approaches.

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Authors and Affiliations

  1. International Solar Energy Institute, Tashkent, Uzbekistan

    R. R. Avezov, N. R. Avezova, E. Yu. Rakhimov & A. U. Vokhidov

Authors
  1. R. R. Avezov
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  2. N. R. Avezova
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  3. E. Yu. Rakhimov
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  4. A. U. Vokhidov
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Corresponding author

Correspondence to R. R. Avezov.

Additional information

Original Russian Text © R.R. Avezov, N.R. Avezova, E.Yu. Rakhimov, A.U. Vokhidov, 2018, published in Geliotekhnika, 2018, No. 1, pp. 14–22.

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Avezov, R.R., Avezova, N.R., Rakhimov, E.Y. et al. Determination of the Convective Heat-Exchange Coefficient in Inner Channels of Light-Absorbing Heat-Exchange Panels of Flat-Plate Solar Water-Heating Collectors Based on the Results of Their Short-Term Thermal Testing in Full-Scale Conditions. Appl. Sol. Energy 54, 10–16 (2018). https://doi.org/10.3103/S0003701X18010036

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  • DOI: https://doi.org/10.3103/S0003701X18010036

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