Abstract
A novel pumped hydro combined with compressed air energy storage (PHCA) system is proposed in this paper to resolve the problems of bulk energy storage in the wind power generation industry over an area in China, which is characterised by drought and water shortages. Thermodynamic analysis of the energy storage system, which focuses on the pre-set pressure, storage volume capacity, water air volume ratio, pump performance, and water turbine performance of the storage system, is also presented. This paper discovers how such parameters affect the performance of the whole system. The ideal performance of this novel system has the following advantages: a simple, highly effective and low cost structure, which is comparable to the efficiency of a traditional pumped hydro storage system. Research results show a great solution to the current storage constraints encountered in the development of the wind power industry in China, which have been widely recognised as a bottleneck in the wind energy storage industry.
Highlights
Research on energy storage systems using modern technologies started nearly 150 years ago, and many useful ideas have since been employed worldwide
In order to resolve the energy storage problem in those arid areas, the current paper proposes a new energy storage system, which combines the advantages of the pumped hydro energy storage (PHES) and compressed air energy storage (CAES) system
The system consists of a high pressure vessel, a closed pond connected to the atmosphere, a set pump driven by electricity, and a water turbine connected to a generator (Figure 2)
Summary
Research on energy storage systems using modern technologies started nearly 150 years ago, and many useful ideas have since been employed worldwide. There are still problems in the modern industry for such large-scale energy storage systems. According to [3,4], there are only two kinds of mature technology suitable for wind power storage: pumped hydro energy storage (PHES) and compressed air energy storage (CAES). The novel system is called pumped hydro combined with compressed air energy storage (PHCA). This paper establishes a theoretical mathematical model for the analysis of the process of energy storage and power generation Parameters such as pre-set pressure, storage volume capacity, water air volume ratio, pump performance and water turbine performance, which all affect the performance of the storage system, have been theoretically analysed in the current paper
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