G. Ruskis
Institute of Agricultural Machinery, Latvia University of Agriculture, Latvia
A. Aboltins
Institute of Agricultural Machinery, Latvia University of Agriculture, Latvia
J. Palabinskis
Institute of Agricultural Machinery, Latvia University of Agriculture, Latvia
Ladda ner artikel
http://dx.doi.org/10.3384/ecp110574014Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden
Linköping Electronic Conference Proceedings 57:45, s. 4014-4020
Publicerad: 2011-11-03
ISBN: 978-91-7393-070-3
ISSN: 1650-3686 (tryckt), 1650-3740 (online)
The aims of the research; was to investigate black colored steel-tinplate use for absorber and covered material of collector and compare the efficiency of three types of air heating collectors. This heated air we can exploited for drying of agricultural produce; room ventilation and room heating and etc. 0.1*0.5*1.0 meters long flat-plate collector (FPC) for experimental research was built. Air velocity at the experiments was v=0.9 m/s. We used the sun following collectors. The experimental data were measured and recorded in the electronic equipment (REG). The experiments were carried out in September 2010 at the same weather conditions.
Collectors of insulated and un-insulated surfaces with steel-tinplate absorber as covering material warmed ambient air up to 10-12 and 5-6 degrees corresponding (at irradiance 800 W/m2). This difference indicates the great importance of insulating the collector body. It can explain with intensify heat exchange between absorber and ambient air which reduce efficiency of collector. There was good correlation with irradiance and air heating degree.
Our investigations showed that more effective FPC was collector with absorber tinplate at middle of collector body. At favorable weather conditions the heating degree of ambient air at the outlet reaches 6-8 degrees more that at the outlet of insulated collector covered by steel-tinplate.
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