european journal of social sciences issn: 1450-2267 - EuroJournals

European Journal of Social Sciences – Volume 5, Number 3 (2007)
CPC and fins is shown in figures 3 and 4 respectively. Results show that the collector who has CPC
has higher thermal efficiency and has higher combined efficiency than the collector without CPC.
Figure 2: Comparisons of the collector with and without CPC, and Photovoltaic efficiency at 700 W/m 2 and
Ti = 30 Cº
Photovoltaiv Efficiency ( %
16
14
12
10
8
6
4
2
WithCPC
WithOut CPC
0
0 0.02 0.04 0.06 0.08 0.1
Mass flow rate ( kg/s )
Figure 3: Comparisons of the collector with and without CPC, and Thermal efficiency at 700 W/m 2 and Ti =
30 Cº
Thermal Efficiency ( % )
60
50
40
30
20
10
With CPC
Without CPC
0
0 0.02 0.04 0.06 0.08 0.1
Mass flow rate ( kg/s )
122