Abstract
This paper discusses the effect of jet impingement of water on a photovoltaic thermal (PVT) collector and compound parabolic concentrators (CPC) on electrical efficiency, thermal efficiency and power production of a PVT system. A prototype of a PVT solar water collector installed with a jet impingement and CPC has been designed, fabricated and experimentally investigated. The efficiency of the system can be improved by using jet impingement of water to decrease the temperature of the solar cells. The electrical efficiency and power output are directly correlated with the mass flow rate. The results show that electrical efficiency was improved by 7% when using CPC and jet impingement cooling in a PVT solar collector at 1:00 p.m. (solar irradiance of 1050 W/m2 and an ambient temperature of 33.5 °C). It can also be seen that the power output improved by 36% when using jet impingement cooling with CPC, and 20% without CPC in the photovoltaic (PV) module at 1:30 p.m. The short-circuit current ISC of the PV module experienced an improvement of ~28% when using jet impingement cooling with CPC, and 11.7% without CPC. The output of the PV module was enhanced by 31% when using jet impingement cooling with CPC, and 16% without CPC.
Highlights
Solar energy is a provider of clean and green energy, which can be used to fulfill global energy needs
The electrical performance of the photovoltaic thermal (PVT) system with and without compound parabolic concentrators (CPC) was compared to a simple PV module
Experiments were carried out to analyze the influence of jet impingement of water in PVT-CPC on both the thermal and electrical performance
Summary
Solar energy is a provider of clean and green energy, which can be used to fulfill global energy needs. A hybrid photovoltaic thermal (PVT) system changes solar energy to thermal energy, while a photovoltaic solar cell changes it to electrical energy [1]. The aforementioned system is the result of a combination of solar cells and a thermal collector, which changes sunlight into electricity while removing any remaining heat from the PV module. The electrical efficiency of photovoltaic solar cells is inversely proportional to the temperature; this is attributed to the inherent increase in the resistance of the system. There are many systems that can be designed and equipped to remove extra heat from the PV cells as a manner of cooling, which helps enhance its efficiency due to its lowered resistance. A solar collector is crucial in the solar energy system, as it changes solar radiation into heat
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