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Determination of the Solar Cell Optimal Junction Recombination Velocity Using Hybrid Method
Science Journal of Energy Engineering
Volume 7, Issue 3, September 2019, Pages: 39-44
Received: Sep. 16, 2019; Accepted: Oct. 5, 2019; Published: Oct. 20, 2019
Authors
Nzonzolo, Polytechnical Superior National School ENSP, Marien Ngouabi University, Brazzaville, Congo
Ibondji Mwaziby Nionsi, Polytechnical Superior National School ENSP, Marien Ngouabi University, Brazzaville, Congo
Louis Okotaka Ebale, Polytechnical Superior National School ENSP, Marien Ngouabi University, Brazzaville, Congo
Desire Lilonga-Boyenga, Polytechnical Superior National School ENSP, Marien Ngouabi University, Brazzaville, Congo
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Abstract
In this paper we present a technique for determining the optimum junction recombination velocity of a solar cell, using a combination of the electrical equivalent model, and the finite element method. Starting from the continuity equation that describes the solar cell operation solved in one dimension by the finite element method, the excess minority carrier’s density is determined. From this density, the photocurrent, the photovoltage and the power produced by the solar cell are determined. The photocurrent and the photovoltage are represented according to the junction recombination velocity, as well as the solar cell power versus the photovoltage, for various values of the series resistance. In considering its equivalent electrical model, the solar cell is modeled and simulated with Matlab/Simulink. In this simulation model, the capacitor initially discharged, charges under the effect of the solar cell. Its impedance varying according to time, represents the load resistance which corresponds to an operating point of the solar cell. During the capacitor charge process for various values of the series resistance, we obtain the current-voltage characteristic of the solar cell in order to highlight the series resistance effects on the solar cell power. From the optimal value of the power, and that of solar cell photovoltage obtained by simulating the solar cell using Matlab/Simulink, the value of the junction recombination velocity corresponding to the maximum value of the solar cell power is determined numerically, for various values of the series resistance.
Keywords
Solar Cell, Junction Recombination Velocity, Finite Element, Series Resistance, Photocurrent, Photovoltage, Optimal Power
Nzonzolo, Ibondji Mwaziby Nionsi, Louis Okotaka Ebale, Desire Lilonga-Boyenga, Determination of the Solar Cell Optimal Junction Recombination Velocity Using Hybrid Method, Science Journal of Energy Engineering. Vol. 7, No. 3, 2019, pp. 39-44. doi: 10.11648/j.sjee.20190703.12
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