Experimental and Numerical Analysis of a Stand-Alone PV/T System to Improve its Efficiency

Abstract

Amalgamation of solar thermal system with photovoltaic panel is a common tend to maximize the solar radiation utilization. This paper presents a novel PV/T system which is capable to produce hot air and electricity simultaneously in a unit frame. In this analysis, experimental and numerical analyses were carried out to optimize the electrical conversation and thermal conversion of solar energy of a combined PV/T system. In this system, the PV panel was energized using a concave lens system placing on the collector plate where both systems are positioned at two different racks. Investigations were carried out using both numerical and experimental analysis. The fluid flow and heat transfer characteristics were characterized using a numerical model developed by ANSYS 15. A 3D CFD model was developed employing RNG k-e, and discrete orientation (DO) combined with solar load model. Experiential analysis showed that an overall efficiency was 52.66%. From the numerical analysis, temperature distribution of the solar collector and fluid flow behavior was observed which helped to understand further system development criteria. The main benefits of this unique system presents more collector plate area exposed to direct radiation. In addition temperature of the PV system was controlled to acquire a most efficient PV/T system.