Application of fluid machinery in energy storage

What is a liquid fluid energy storage system?

Similar to the CAES systems, liquid fluid energy storage systems are also divided into two processes: liquefaction and expansion. Fig. 2 shows the simplified structure of liquid fluid energy storage systems (take liquid air as an example). In the liquefaction process, systems use off-peak energy or renewable energy to produce liquid cryogens.

What is the simplified structure of liquid fluid energy storage systems?

Simplified structure of CAES systems. Similar to the CAES systems, liquid fluid energy storage systems are also divided into two processes: liquefaction and expansion. Fig. 2 shows the simplified structure of liquid fluid energy storage systems (take liquid air as an example).

Can cryogens be used in liquid fluid energy storage systems?

This article describes the application of cryogens in liquid fluid energy storage systems and compares liquid fluid energy storage systems with conventional compressed air energy storage systems. The study focuses on the thermodynamic characteristics of different cryogens used in liquid fluid energy storage systems.

What are the thermodynamic characteristics of liquid fluid energy storage systems?

The study focuses on the thermodynamic characteristics of different cryogens used in liquid fluid energy storage systems. It is found that liquid fluid energy storage systems have competitive factors like high energy density and no geographical limitation.

What is energy density in liquid fluid energy storage systems?

In liquid fluid energy storage systems, the energy density can be defined as the amount of electricity generation per unit volume of fluid.

How can a gravity hydraulic energy storage system be improved?

For a gravity hydraulic energy storage system, the energy storage density is low and can be improved using CAES technology . As shown in Fig. 25, Berrada et al. introduced CAES equipment into a gravity hydraulic energy storage system and proposed a GCAHPTS system.