F. Salek; M. Rahnama; H. Eshghi; M. Babaie; M. M. Naserian
Abstract
In this study, a solar driven alkaline electrolyzer producer of hydroxy gas is proposed which is integrated with photovoltaic panels with single-axis north-south solar tracking system. The main novelty of this work is providing transient analysis of integration of alkaline electrolyzer to the PV panels ...
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In this study, a solar driven alkaline electrolyzer producer of hydroxy gas is proposed which is integrated with photovoltaic panels with single-axis north-south solar tracking system. The main novelty of this work is providing transient analysis of integration of alkaline electrolyzer to the PV panels equipped with solar tracking system. Furthermore, the transient model of the alkaline electrolyzer is employed to calculate its operating temperature, hydroxy production rate and the other operational parameters at various hours of the day. The electrolyzer and PV panels with tracking system are modelled in EES software. It is assumed that the system is installed in Shahrood city, therefore, the geographical data this city is used for seasonal analysis. The effective area of electrolyzer electrodes and PV panels is also assumed to be fixed at 0.25m2 and 50m2, respectively, in this study. Based on the results, employment of solar tracking system resulted in significant increment of PV panels power absorption rate resulting in power increment up to 4.2kW in summer. On the other hand, the transient analysis of the proposed alkaline electrolyzer showed that the maximum operating temperature of which reaches 80oC at around 12 AM in the summer cause of achieving maximum electrical current peak in summer. Therefore, an efficient cooling system should be employed in summer for decrement of alkaline electrolyzer temperature. The proposed system is capable of producing 7.6m3/day, 10.4m3/day, 7.2m3/day and 4.1m3/day hydroxy gas in spring, summer, fall, and winter, consecutively.
H. Pourderogar; H. Harasii; R. Alayi; Seyed H. Delbari; M. Sadeghzadeh; A.R. Javaherbakhsh
Abstract
This paper aims to determine the optimal performance characteristics of a solar tracking system in order to maximize the power generation through using the MOPSO algorithm. Considering the sun path during a day, the necessity of using solar tracking systems to achieve the maximum power output from photovoltaic ...
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This paper aims to determine the optimal performance characteristics of a solar tracking system in order to maximize the power generation through using the MOPSO algorithm. Considering the sun path during a day, the necessity of using solar tracking systems to achieve the maximum power output from photovoltaic (PV) panels has been investigated. The solar tracking system allows PV arrays to follow sunlight all day long. The unidirectional tracking system follows the sun path, thereby optimizing the angular motion of PV arrays relative to the sun resulting in higher power generation. To evaluate the performance of a PV system, the total solar radiation was calculated first for both fixed and unidirectional tracking systems. Analyzing the results indicates that for June 20th the power generation of the PV module equipped with a unidirectional tracker is 35% higher than the fixed PV module. The optimal value of the declination angle, Azimuth, and arrays’ tilting angles in a unidirectional tracking system calculated using the MOPSO algorithm are , and respectively.