High temperature air energy storage system design

What is compressed air energy storage (CAES)?

Compressed air energy storage (CAES) is an effective technology for mitigating the fluctuations associated with renewable energy sources. In this work, a hybrid cogeneration energy system that integrates CAES with high-temperature thermal energy storage and a supercritical CO 2 Brayton cycle is proposed for enhancing the overall system performance.

How AA-CAES system is integrated with a high-temperature thermal energy storage system?

The schematic diagram of the proposed AA-CAES system integrated with a high-temperature thermal energy storage system and an ORC: (a) charging and (b) discharging. As illustrated in Fig. 1 a, during the energy storage process, air enters CP1-CP4 and IC1-IC4. Then, the generated high-pressure air is stored in the ASC.

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 .

How sensitive is a thermal energy storage system?

Sensitivity evaluation indicates that the operational effectiveness of the system is highly sensitive to the maximum and minimum air storage pressures, the outlet temperature of the high-temperature thermal energy storage unit, and the isentropic efficiencies of both compressors and turbines.

What is a high-temperature hybrid CAES system?

To optimize the utilization of heat produced by compressors, Sammy et al. proposed a high-temperature hybrid CAES system. This system preheats compressed air through separate low-temperature and high-temperature thermal energy storage units, achieving a roundtrip efficiency of approximately 53 %.