A flat plate solar collector is modelled as a rectangular channel of high width to gap ratio with air entering the collector with a fully developed turbulent velocity profile. One plate of the collector is subjected to a uniform heat flux with the other plate heavily insulated. Experimental values of friction factor and heated plate temperature in the thermal entrance region are presented and compared with analytical predictions. It is shown that there will be significant plate temperature variation in the thermal entrance region particularly at low flow rates. It is also shown that neglecting conduction effects in the absorber plate will not lead to any significant errors in estimating absorber plate temperature variation. Tabulated values of dimensionless plate temperature for different values of the dimensionless distance from the leading edge for several Reynolds number are presented.
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Temperature Variation in the Absorber Plate of an Air Heating Flat Plate Solar Collector
L. A. Diaz,
L. A. Diaz
Department of Mechanical Engineering and Engineering Mechanics, Michigan Technological University, Houghton, Mich.
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N. V. Suryanarayana
N. V. Suryanarayana
Department of Mechanical Engineering and Engineering Mechanics, Michigan Technological University, Houghton, Mich.
Search for other works by this author on:
L. A. Diaz
Department of Mechanical Engineering and Engineering Mechanics, Michigan Technological University, Houghton, Mich.
N. V. Suryanarayana
Department of Mechanical Engineering and Engineering Mechanics, Michigan Technological University, Houghton, Mich.
J. Sol. Energy Eng. May 1981, 103(2): 153-157 (5 pages)
Published Online: May 1, 1981
Article history
Received:
March 2, 1981
Online:
November 11, 2009
Citation
Diaz, L. A., and Suryanarayana, N. V. (May 1, 1981). "Temperature Variation in the Absorber Plate of an Air Heating Flat Plate Solar Collector." ASME. J. Sol. Energy Eng. May 1981; 103(2): 153–157. https://doi.org/10.1115/1.3266221
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