Hitek: Comparison of different types of collectors

All these charts demonstrate efficiencies of collectors when heating water from ambient temperature to 75 C degree.
Location one:
Winter: Solar radiation: 546W/M2; Ambient temperature: 17.8 C

Tube solar collector is on average 81% more efficient per M2 of aperture than the flat plate solar collectors.

Summer: Solar radiation: 828W/M2; Ambient temperature: 25.2 C
Tube solar collector is on average 54% more efficient per M2 of aperture than the flat plate solar collectors.


Location two:
Winter: Solar radiation: 426W/M2; Ambient temperature: 13.1 C
Tube solar collector is on average 104% more efficient per M2 of aperture than the flat plate solar collectors.
Summer: Solar radiation: 840W/M2; Ambient temperature: 21.3 C
Tube solar collector is on average 50.5% more efficient per M2 of aperture than the flat plate solar collectors.



Location three:
Winter: Solar radiation: 296W/M2; Ambient temperature: 9.9 C
Tube solar collector is on average 163.5% more efficient per M2 of aperture than the flat plate solar collectors.
Summer: Solar radiation: 861W/M2; Ambient temperature: 19.8 C

Tube solar collector is on average 51.5% more efficient per M2 of aperture than the flat plate solar collectors.