Solar collector study applying low fluid flow debit of the heat-carrier

The experimental research was carried out on a laboratory solar stand using the simulated solar irradiance of 800±45 W/m². The highest efficiency rate of the solar collector was (0,8), when the debit of the heat-carrier was 0,01 kg/s, whereas applying higher heat-carrier debit of 0,02 kg/s, the efficiency rate was only (0,77). It was determined that the efficiency of solar collector dropped by 7 % and reached (0,74) when heat-carrier debit was 0,01 kg/s however the efficiency declined by 6 % and stood at (0,72) applying 0,02 kg/s debitVytauto Didžiojo universitetasŽemės ūkio akademij