In this paper a comparison between numerical model and experimental work results for a fixed Photovoltaicl Thermal (PV IT) hybrid system is presented. The simulation in this work is based on a numerical model in solving the equations and determining the Photovoltaic (PV) cells thermal characteristics using both MATLAB and Comsol Multiphysics. Comsol is simulating the electromagnetic waves produced by the Sun through solving Maxwell's equations in three dimensions using Finite Elements Methods (FEM) and the sun irradiance is assumed to be Gaussian distribution across the twelve mourning hours. Beside that an experimental work is presented depending on the results conjured from the theoretical experience used in Comsol Multiphysics. A Pulse Width Modulator (PWM) is used to control the solenoid valve operation. In addition to the above a thermal analysis for the fixed PV modules and the piping water is presented where the output water temperatures, rate of heat transfer, overall heat transfer coefficient and thermal efficiency are calculated. As a result, a significant enhancement in the total thermal efficiency is observed with acceptable increase in the output water temperature.
This paper surveys how the characterization process for a Photovoltaic module (PV) is implemented to serve in introductory undergraduate courses and research purposes. The characterizer has the capability of measuring the I-V and P-V characteristic curve of the PV module attached to the system with indicating the solar irradiance that is sensed during the measurement. Also a control circuit design is implemented for dual tracking the PV module. In addition, the developed program introduces the facility of compering the measured data with a numerical based simulation data results from a PV simulator using MATLAB platform. The use of the National Instrument (NI) Environment facilitates the Internet publication opportunity where users can access the setup remotely. The remote accessibility is considered as a significant credit in integrating the setup as a demonstration tool in teaching modules as well as student accessibility. The results of the NI software are presented and discussed and analysed.
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