High temperature air energy storage system design

Can a compressed air energy storage system be used as heat source?

Yang, C.; Sun, L.; Chen, H. Thermodynamics Analysis of a Novel Compressed Air Energy Storage System Combined with Solid Oxide Fuel Cell–Micro Gas Turbine and Using Low-Grade Waste Heat as Heat Source.

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 .

What is compressed air energy storage (CAES)?

Compressed air energy storage (CAES) is an effective solution for balancing this mismatch and therefore is suitable for use in future electrical systems to achieve a high penetration of renewable energy generation.

Which thermal energy storage units are modeled isobaric and adiabatic?

The thermal energy storage units (TS1 and TS2) are modeled isobaric and adiabatic. A.2.1. Charge phase of A-CAES Equations (A6) and (A10) remain applicable to determine the temperature and mass of compressed air entering the cavern over the charging period.

How are compressed air storage reservoir models validated?

The developed models for the compressed air storage reservoir were validated by performing a comparative analysis with the results presented in , where a numerical methodology based on thermodynamic considerations was used to estimate the exergy storage capacity in caverns.

Why are thermal energy storage units not efficient?

However, due to constraints related to compressor efficiency, structure limitations, and the effectiveness of heat exchangers, the thermal medium in the thermal energy storage unit, which relies on compression heat, cannot reach sufficiently high temperature . Consequently, both power generation and overall system efficiency are limited.