Abstract
In order to deal with the energy crisis and environmental pollution, renewable energy power generation in the world has been rapid development. At present, the most widely used is solar energy and wind energy, but also caused a serious problem of abandoning light and wind. Hydrogen energy has become an ideal carrier of electric energy storage due to its high efficiency, clean and renewable characteristics. Electrolytic water hydrogen production technology with renewable energy as power source is one of the most promising energy conversion methods. This paper briefly analyzes the current situation of power generation and consumption of renewable energy in China in recent years, and then expounds the characteristics, principles, development status and improvement methods of alkaline, proton exchange membrane and high temperature solid oxide electrolytic water hydrogen production technology, and demonstrates its application prospect in the field of renewable energy power generation and energy storage with examples.
Highlights
Population growth and improved personal comfort are two important factors affecting the world economy
The process is shown in Figure 3(a); When the renewable energy power generation system is a small off-grid type, if there is still surplus power after it is supplied to independent users, in addition to the use of storage batteries, a distributed small electrolysis equipment can be built to achieve consumption, as figure 3(b)
For alkaline and proton exchange membrane (PEM) electrolysis, the energy consumed in the electrolysis process is provided by electrical energy, while solid oxide electrolysis (SOE) has a higher operating temperature, which requires electrical energy, and hightemperature heat energy
Summary
Population growth and improved personal comfort are two important factors affecting the world economy. The increase in energy consumption and the production of more greenhouse gases (GHG) affect the fossil economy. In order to match supply with demand and solve the problem of large-scale consumption of surplus power from renewable energy, it is essential to find a suitable way of energy storage. Conventional energy storage technologies include pumped energy storage, compressed air energy storage, battery energy storage and superconducting energy storage [1,2]. These conventional energy storage methods cannot meet the demand for super large capacity and long cycle consumption, but hydrogen storage has become the most potential energy storage technology currently due to its large capacity and transportability [3]. Electrolysis of water to produce hydrogen accounts for about 5%, and other
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