Improving of the photovoltaic / thermal system performance using water cooling technique

9th Curtin University of Technology Science and Engineering International Conference 2014

自然科学;工业技术

Hussien, Hashim A.^1 ; Numan, Ali H.^1 ; Abdulmunem, Abdulmunem R.^1

Eletromechanical Engineering Department, University of Technology, Baghdad, Iraq^1

关键词: Active cooling;    Cooling technique;    Electrical efficiency;    Experimental rigs;    Optimum mass flow rate;    Photovoltaic/thermal systems;    Thermal efficiency;    Upper surface;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/78/1/012020/pdf
DOI  :  10.1088/1757-899X/78/1/012020

来源: IOP

【 摘 要 】

This work is devoted to improving the electrical efficiency by reducing the rate of thermal energy of a photovoltaic/thermal system (PV/T).This is achieved by design cooling technique which consists of a heat exchanger and water circulating pipes placed at PV module rear surface to solve the problem of the high heat stored inside the PV cells during the operation. An experimental rig is designed to investigate and evaluate PV module performance with the proposed cooling technique. This cooling technique is the first work in Iraq to dissipate the heat from PV module. The experimental results indicated that due to the heat loss by convection between water and the PV panel's upper surface, an increase of output power is achieved. It was found that without active cooling, the temperature of the PV module was high and solar cells could only achieve a conversion efficiency of about 8%. However, when the PV module was operated under active water cooling condition, the temperature was dropped from 76.8°C without cooling to 70.1°C with active cooling. This temperature dropping led to increase in the electrical efficiency of solar panel to 9.8% at optimum mass flow rate (0.2L/s) and thermal efficiency to (12.3%).