Energy and Exergy Analysis of Photovoltaic Thermal System (PV/T) With Water Flow

In this work, the performance of a solar system, in more detail, the thermal photovoltaic system is investigated. Numerical study has been done through coding in MATLAB software and by simultaneously solving equations related to the electrical and thermal parts, which provides the possibility of performing various investigations on the system. It is noteworthy that the PV part of this code, which is entirely accurate, can also use independently for photovoltaic systems. Numerical study has three features: parametric study, and collector performance in one day and in one year. As the wind speed increases from zero to 14 m/s, the electrical efficiency increases by about 4%, the thermal efficiency decreases by about 22%, and the overall efficiency of the system decreases by 18%; Therefore, there is a possibility of drastic changes in the performance of the system with changes in wind speed. By increasing the amount of radiation from 350 to 1050 W/m2, the electrical, thermal and overall efficiency shows a 1% decrease, 16% increase and 14% increase, respectively. Assuming an increase in the ambient temperature from 5 to 60 oC, the electrical efficiency decreases by 2.5%, the thermal efficiency increases by 0.5% and the overall efficiency decreases by 2%. Also, the results show that the thermal output power of the photovoltaic thermal system varies between 280 and 460 Watts and the electrical output power varies between 120 and 190 Watts throughout the year.