Modelling, Validation and Analyzing Performance of Serpentine-Direct PV/T Solar Collector Design
Keywords:photovoltaic–thermal collector PV/T, absorber design, electrical efficiency, thermal efficiency
The photovoltaic thermal, PV/T water collector’s thermal and electrical performance was investigated for two absorbers design. Comparison between them were done using validated simulation of the model which was presented using theoretical data with the help of program MATLAB. The first design serpentine and the second serpin-Direct (new design), were defined under solar radiation levels (300-1100) W/m2. Mass flow rate range from (0.011 kg /s to 0.1 kg /s) at each level of solar radiation. The PV/T system was evaluated in terms of thermal efficiency, electrical efficiency and a combination of both PV/T efficiencies. The results showed that the values of cell efficiency increases with decreasing solar radiation and cell temperature. The cell temperature increases with increasing solar radiation and decreases with the increasing mass flow rate. The outlet water temperature increases with rising solar radiation and decreases as mass flow rate rises. At optimum conditions of 900W/????2 solar radiation and 0.06 kg/s mass flow rate, the results indicated that serpin-direct PV/T design achieved 53% thermal and 14.3% electrical efficiency respectively. Under same operating conditions the results showed the priority of serpen-direct PV/T collector design performance versus the serpentine PV/T collector in term of thermal and electrical efficiency.