This work presents a new way of minimize the losses on a flat plate solar energy collector. A wind barrier is added along the collector perimeter in order to modify the flow pattern over it. This barrier creates a region of recirculating separated flow on top of the collector. This is an initial phase of the work and only winds aligned with the solar collector are investigated. In other words no influence of lateral winds is accounted for. The first experimental results proved very encouraging. It was observed a 12% heat-loss reduction in comparison with the traditional double glazing solution.
Issue Section:
Technical Papers
1.
New Grolier Multimedia Encyclopedia, 1993, Release 6, Version 6.03, Grolier Inc.
2.
Duffie, J. A., and Beckman, W. A., 1980, Solar Engineering of Thermal Processes, Wiley Interscience, New York.
3.
Agarwal
, V. K.
, and Larson
, D. C.
, 1981
, “Calculation of the Top Loss Coefficient of a Flat-Plate Collector
,” Sol. Energy
, 27
, pp. 69
–71
.4.
Hottel
, H. C.
, and Woertz
, B. B.
, 1942
, “Performance of Flat-Plate Solar-Heat Collectors
,” Trans. ASME
, 64
, p. 91
91
.5.
Tabor
, H.
, 1958
, “Radiation, Convection and Conduction Coefficients in Solar Collectors
,” Bull. Res. Counc. Isr., Sect. F
, 6C
, p. 155
155
.6.
Bliss
, Jr., R. W.
, 1959
, “The Derivations of Several ‘Plate-Efficiency Factors’ Useful in the Design of Flat-Plate Solar Heat Collectors,” Solar Energy Laboratory, Institute of Atmospheric Physics, University of Arizona, Tucson
, Sol. Energy
, 3
, pp. 55
–64
.7.
Malhotra
, A.
, Garg
, H. P.
, and Rani
, U.
, 1980
, “Minimizing Convective Heat Losses in Flat Plate Solar Collectors
,” Solid-State Electron.
, 25
, pp. 521
–526
.8.
Klein
, S. A.
, 1975
, “Calculation of Flat-Plate Collector Loss Coeficients,” Solar Energy Laboratory, University of Wisconsin, Madison, U.S.A.
, Solid-State Electron.
, 17
, pp. 79
–80
.9.
McAdams, W. H., 1954, Heat Transmission, 3rd ed., McGraw-Hill, New York.
10.
ASHRAE, Standard 93-77, 1977, “Methods of Testing to Determine the Thermal Performance of Solar Collectors,” American Society of Heating, Refrigeration and Air Conditioning Engineers, New York.
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