Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE credits
Photovoltaic Thermal/Hybrid collectors are an emerging technology that combines PV
and solar thermal collectors by producing heat and electricity simultaneously. In this paper,
the electrical performance evaluation of a low concentrating PVT collector was done
through two testing parts: power comparison and performance ratio testing. For the
performance ratio testing, it is required to identify and measure the factors affecting the
performance ratio on a low concentrating PVT collector. Factors such as PV cell
configuration, collector acceptance angle, flow rate, tracking the sun, temperature
dependence and diffuse to irradiance ratio.
Solarus low concentrating PVT collector V12 was tested at Dalarna University in Sweden
using the electrical equipment at the solar laboratory. The PV testing has showed
differences between the two receivers. Back2 was producing 1.8 energy output more than
Back1 throughout the day. Front1 and Front2 were almost the same output performance.
Performance tests showed that the cell configuration for Receiver2 with cells grouping (6-
32-32-6) has proved to have a better performance ratio when to it comes to minimizing
the shading effect leading to more output power throughout the day because of lowering
the mismatch losses. Different factors were measured and presented in this thesis in
With the current design, it has been obtained a peak power at STC of 107W per receiver.
The solar cells have an electrical efficiency of approximately 19% while the maximum
measured electrical efficiency for the collector was approximately 18 % per active cell area,
in addition to a temperature coefficient of -0.53%/ ˚C. Finally a recommendation was
done to help Solarus AB to know how much the electrical performance is affected during
variable ambient condition and be able to use the results for analyzing and introducing
new modification if needed.