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Experimental study of enhancement of heat transfer and pressure drop in a solar air channel with discretized broken V-pattern baffle

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  • Kumar, Raj
  • Sethi, Muneesh
  • Chauhan, Ranchan
  • Kumar, Anil

Abstract

This article presents an experimental study on heat transfer and friction characteristics of solar air channel fitted with discretized broken V-pattern baffle on the heated plate. The effect of geometrical parameters, predominantly the gap width and gap location has been investigated. The roughened baffle air channel has a width to height ratio, W/H of 10. The relative baffle gap distance, Dd/Lv and relative baffle gap width, gw/Hb has been varied from 0.26 to 0.83 and 0.5–1.5, respectively. Experiments have been carried out for the range of Reynolds number, Re from 3000 to 21,000 with the relative baffle height, Hb/H range of 0.25–0.80, relative baffle pitch, Pb/H range of 0.5–2.5; and angle of attack, αa range of 30°–70°. The optimal values of geometrical parameters of roughness have been obtained and discussed. For Nurs the greatest enhancement of the order of 4.47 times of the corresponding data of the without channel has been obtained. The absolute highest data of thermal hydraulic performance parameter has been found to be greater corresponding to Dd/Lv of 0.67, gw/Hb of 1.0, Hb/H of 0.50, Pb/H of 1.5, and αa of 60°. The maximum value of the thermal hydraulic performance parameter was found to be 3.14 for the range of parameters investigated.

Suggested Citation

  • Kumar, Raj & Sethi, Muneesh & Chauhan, Ranchan & Kumar, Anil, 2017. "Experimental study of enhancement of heat transfer and pressure drop in a solar air channel with discretized broken V-pattern baffle," Renewable Energy, Elsevier, vol. 101(C), pages 856-872.
    • Handle: RePEc:eee:renene:v:101:y:2017:i:c:p:856-872
    DOI: 10.1016/j.renene.2016.09.033
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    References listed on IDEAS

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    1. Kumar, Anil & Kim, Man-Hoe, 2016. "Heat transfer and fluid flow characteristics in air duct with various V-pattern rib roughness on the heated plate: A comparative study," Energy, Elsevier, vol. 103(C), pages 75-85.
    2. Akpinar, Ebru Kavak & Koçyigit, Fatih, 2010. "Energy and exergy analysis of a new flat-plate solar air heater having different obstacles on absorber plates," Applied Energy, Elsevier, vol. 87(11), pages 3438-3450, November.
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    Cited by:

    1. Prasad, Jay Shankar & Datta, Aparesh & Mondal, Sirshendu, 2024. "Numerical analysis of a solar air heater with offset transverse ribs placed near the absorber plate," Renewable Energy, Elsevier, vol. 227(C).
    2. Prasad, Jay Shankar & Datta, Aparesh & Mondal, Sirshendu, 2024. "Flow and thermal behavior of solar air heater with grooved roughness," Renewable Energy, Elsevier, vol. 220(C).

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