Solid gravity energy storage technology: Classification and comparison

Abstract

Large-scale energy storage technology plays an essential role in a high proportion of renewable energy power systems. Solid gravity energy storage technology has the potential advantages of wide geographical adaptability, high cycle efficiency, good economy, and high reliability, and it is prospected to have a broad application in vast new energy-rich areas. As a novel and needs to be further studied technology, solid gravity energy storage technology has become one of the important development directions of large-scale energy storage technology. This paper firstly briefly introduces various types of SGES technologies and their characteristics. Secondly, to address the problem that there is no detailed quantitative analysis of multiple kinds of SGES, this paper presents a detailed analysis and discussion of various types of SGES technologies based on the evaluation indexes of large-scale energy storage technologies. Again, by assigning reasonable weights to each evaluation index and performing normalized analysis, the quantitative analysis of the performance levels of different SGES technologies is conducted. The results will provide valuable references for selecting specific SGES technologies in engineering practice. Finally, based on the results of this paper, we provide some suggestions for the following research on SGES technologies. Considering the lack of construction conditions for pumped hydro energy storage in many areas rich in new energy resources, solid gravity energy storage will gain huge development space with low cost and excellent performance.

Keywords

• High proportion of new energy power system
• Energy storage technology
• Solid gravity energy storage
• Comparison
• Prospect