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Performance of Photovoltaic - Thermal (PVT) and Photovoltaic (PV) Systems under Various Weather Conditions
R.R. Vardanyan, V.K. Dallakyan, N.K. Badalyan
Environmental Effect, Thermal Performance, Photovoltaic (PV), Solar Cells
PV Systems – Modelling, Design, Operation and Performance
Subtopic: Concentrators, PV for Space Applications, and TPV
Event: 38th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5CV.3.19
1332 - 1334
ISBN: 3-936338-78-7
Paper DOI: 10.4229/EUPVSEC20212021-5CV.3.19
0,00 EUR
Document(s): paper, poster


Solar photovoltaic and thermal hybrid systems have a high potential for producing electricity and thermal energy with increased efficiency of the system. The hybrid system proves to be much more energy-efficient during the warm climate seasons with improved electrical efficiency due to the cooling of solar cells and gained thermal energy due to heat absorbed by the fluid from the solar cells (dual effect). Unfortunately, there is a lack of investigations of PVT systems’ performance during the cold weather conditions. In this work, the performance temperatures of the PVT module and general PV module are experimentally investigated. It is shown that during cold climate seasons, the temperature of the PVT collector can become higher than the temperature of the general PV module due to the decreased convection cooling of PVT in comparison with the PV module. The ambient temperature below which the PVT module is hotter than the PV module is called the “critical”. As a result of this process, the electrical efficiency of the PVT module is becoming smaller than the efficiency of the PV module. This process is called the “reverse” process. To overcome this problem the PVT system must be optimized taking into consideration the weather conditions under which the PVT system is operating.