Results of investigation of a double-pass air solar collector

Solar air collectors are simple in design and maintenance. Corrosion, leakage and boiling problems are less severe compared with liquid solar collectors. The solar air collectors is not very widely used except for drying of some agricultural products. But it is possible to use solar air heaters for space heating. In this case it is actual to reduce heat losses to the ambient by forcin; air to flow over the glass cover. This paper presents the results of the investigation of a double-pass solar air collector. The product of collector efficiency factor and overall loss coefficient and the product of collector efficiency factor and optical efficiency were established experimentallyVytauto Didžiojo universitetasŽemės ūkio akademij