Abstract
Production of hydrogen by means of renewable energy sources is a way to eliminate dependency of the system on the electric grid. This study is based on a technique involving coupling of an oxyhydrogen (HHO) electrolyzer with solar PV to produce clean HHO gas as a fuel. One of objectives of this study was to develop a strategy to make the electrolyzer independent of other energy sources and work as a standalone system based on solar PV only. A DC-DC buck convertor is used with an algorithm that can track the maximum power and can be fed to the electrolyzer by PV while addressing its intermittency. The electrolyzer is considered to be an electrical load that is connected to solar PV by means of a DC-DC convertor. An algorithm is designed for this DC-DC convertor that allows maximization and control of power transferred from solar PV to the electrolyzer to produce the maximum HHO gas. This convertor is also responsible for operating the electrolyzer in its optimum operating region to avoid overheating. The DC-DC converter has been tested under simulated indoor conditions and uncontrolled outdoor conditions. Analysis of this DC-DC convertor based on maximum power tracking algorithm showed 94% efficiency.
Highlights
Demand of energy is peaking day-by-day relative to the available traditional fossil based resources [1,2]
The strategy of the convertor that was used in this study was fully established with 94% efficiency by considering two objectives: (i) working of the successfully established with 94% efficiency by considering two objectives: (i) working of electrolyzer in its operating region, (ii) delivering the maximum available power of the PV
It was further explored that due to was seen that this strategy works in achieving these objectives. It was further explored the slow response nature of alkaline electrolyzers it makes the convertor slow while the that due to the slow response nature of alkaline electrolyzers it makes the convertor slow tracking power is in a high intermittency situation as it increases the duty to a high level
Summary
Demand of energy is peaking day-by-day relative to the available traditional fossil based resources [1,2]. While the ability to produce renewable electricity has achieved considerable technological maturity and dramatically lower costs in the past decade, it is imperative to focus attention on reliable energy storage, transportation and deep de-carbonization of hard to electrify industrial sectors. Green fuels and their means of production are always a fascination for researchers to overcome both energy and environmental issues. On-demand HHO gas is considered as one of the alternative green fuel options. The HHO gas can be cost effectively generated and consumed on-demand in various engineering and combustion applications [5,6]
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