Solid energy storage solution design

What is solid gravity energy storage technology (SGES)?

Solid gravity energy storage technology (SGES) is a promising mechanical energy storage technology suitable for large-scale applications. However, no systematic summary of this technology research and application progress has been seen.

How many technical routes does solid gravity energy storage technology have?

Solid gravity energy storage technology has as many as eight technical routes. Although the technical routes are different, some essential features are the same. They can be summarized into two aspects: principle and equipment.

What is Bes energy storage technology?

BES is the most typical energy storage technology, which realizes the conversion of electrical energy and chemical energy through a redox reaction. This technology is widely used in small and medium capacity applications, but there are still safety problems in large-scale capacity application scenarios.

What is energy-type energy storage technology?

The energy-type energy storage technology has a large energy storage capacity, suitable for large-scale storage of electric energy and peak shaving, mainly including PHES, CAES, BES, and SGES technology.

What is the cycle efficiency of solid gravity energy storage (SGES)?

The motor-generation unit is the energy conversion hub of solid gravity energy storage, which directly determines the cycle efficiency of solid gravity energy storage technology. The current efficiency of motor-generation units is about 90 %, so SGES's cycle efficiency is around 80 %.

Is SGES a good energy storage technology?

SGES has a high cycle efficiency (80 % ~ 90 %) compared with other large-scale energy storage technologies (40 % ~ 80 %). Economics is fundamental in the context of generally high energy storage prices. Studies have shown that SGES is the most economical large-scale energy storage technology, even better than PHES.