Aivars Aboltins
Institute of Agricultural Machinery, Latvia University of Agriculture, Latvia
Janis Palabinskis
Institute of Agricultural Machinery, Latvia University of Agriculture, Latvia
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http://dx.doi.org/10.3384/ecp110573991Published in: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden
Linköping Electronic Conference Proceedings 57:42, p. 3991-3998
Published: 2011-11-03
ISBN: 978-91-7393-070-3
ISSN: 1650-3686 (print), 1650-3740 (online)
The research had two aims-1 st. determine the airflow temperature distribution depending on the thickness of the collector air channel and collector length; where the absorber is a steel tinplate ; 2 nd. Search non-traditional (utilized) materials (slices of black coloured beer cans; different size black colour seed boxes made of polypropylene) that could be used as absorbents of air heating solar collectors 0.1x0.5x1.0 meters long flat-plate collectors (FPC) for experimental research into the materials of solar air heating collector were built. The air velocity at the experiments was v=0.9 m/s; covered material - polystyrol plate. We used the sun following collectors; which guarantees perpendicular location of the plane of absorber from the flow of sun irradiance.
From the experimental data were obtained an analytical expressions that describe the solar radiation and collector air channel size influence to the flowing air temperature in FPC using steel tinplate absorber. The panel of black colored slices of beer cans can be used for air heating solar collectors as absorber. The experimental data show the temperature difference in outlet of sun following collector reaches up to 10-11 degree with sun irradiance 1000 W/m2 at different weather conditions. It is a little more better than the best seed boxes.
