In this paper, mathematical model and simulation for optimization of direct coupling solar photovoltaic (PV) panel and advanced alkaline electrolyzer is presented. The simulation models related the PV panel and the advanced alkaline electrolyzer are constructed in MATLAB Simulink environment. Results related power-voltage characteristics and the current-voltage characteristics of both systems have been presented. Simulation studies were carried out at different operating temperatures (40, 60 and 80°C) for the advanced alkaline electrolyzer. It was observed that the operating voltage that corresponds to 80°C results in the smallest operating voltage compared to the other two operating temperatures. The results show that the difference in operating temperatures did not have any significant effect on Faraday's efficiency of the electrolysis process. However, Faraday's efficiency increases sharply to a maximum of about 98% at current density of 90 mA/cm2. At solar irradiance of 1000W/m2, the PV was observed to produce a maximum power of about 60W. This power was matched against the voltage requirement of the advanced alkaline electrolyzer. The number of cells of the advanced alkaline electrolyzer was varied to give an optimum number of cells that can match the available power from the PV. In conclusion it was observed that the I-V curve of 10 cells intersected at the maximum power output of the PV generator. The overall results show that the hydrogen production increased as the MPPT efficiency is increased.
Rahim, A. H. A., Tijani, A. S., Fadhlullah, M., Hanapi, S., & Sainan, K. I. (2015). Optimization of Direct Coupling Solar PV Panel and Advanced Alkaline Electrolyzer System. In Energy Procedia (Vol. 79, pp. 204–211). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2015.11.464