Supplementary Combustion Air Energy Storage System Diagram

What is supplementary combustion energy storage (CAES)?

The operation characteristic of the CAES The traditional CAES, also known as supplementary combustion compressed air energy storage, has a complete operating process including energy storage and energy release, and the operating principle is shown in Fig. 2. The essence of energy storage is to use surplus electricity to compress air.

How supplementary combustion CAES system is classified?

Schematic diagram of the supplementary combustion CAES system. Energy losses inside turbomachinery are usually classified based on flow phenomena and mechanism, including incidence loss, skin friction loss, clearance loss, blade loading loss, mixing loss and so on.

What is the exergy efficiency of a compressed air energy storage system?

In the exergy analysis, the results indicate that the exergy efficiency of the compressed air energy storage subsystem is 80.46 %, which is 16.70 % greater than the 63.76 % of the reference compressed air energy storage system, showing that the system integration can decline the exergy loss.

What is a conventional compressed air energy storage system?

Schematic of a generic conventional compressed air energy storage (CAES) system. The prospects for the conventional CAES technology are poor in low-carbon grids [2,6–8]. Fossil fuel (typically natural gas) combustion is needed to provide heat to prevent freezing of the moisture present in the expanding air .

How do compressed air storage systems use energy?

The modeled compressed air storage systems use both electrical energy (to compress air and possibly to generate hydrogen) and heating energy provided by natural gas (only conventional CAES). We use three metrics to compare their energy use: heat rate, work ratio, and roundtrip exergy efficiency (storage efficiency).

What is biomass energy storage and energy release process?

In the energy storage process, the feedwater from the biomass power generation system is used to cool the compressed air in the compressed air energy storage system. In the energy release process, the flue gas from the biomass power generation system is used to heat the compressed air.