| Popis: |
Innovative concentrating PVT solar collector concepts based on a CPC geometry concept were developed to outperform the asymmetric Solarus CPVT collector and therefore decrease the energy/performance gap between CPVT and PV/ST solar collectors. The updated reflector geometry proved to be the most suitable reflector geometry for CPVTs, where the electrical peak efficiency per gross area reached 10.6%, which is +16.5%relhigher than the electrical peak efficiency of the Solarus CPVT. Optical efficiencies ofη0=62.3% andη0=61.8% for CPC 1 and CPC 2 have been achieved, respectively. A PV module (0.5m2) combined with an ST solar collector (0.5m2) system to be able to deliver the same overall energy yield as the newly developed CPVT collector (1m2) requires on average +0.02m2(at 45°C), −0.06m2(at 55°C) and −0.15m2(at 65°C) of installed area, for a wide range of latitudes. A CPC-PVT system to increase its competitiveness requires a material cost reduction and at the same time an increased overall efficiency. Nevertheless, the energy/performance gap between a system composed of PV+ST technologies and a CPC-PVT decreased significantly. |
