Low-carbon energy storage for the winter

Is CO2 a good energy storage option?

Compared with compressed air energy storage (CAES), compressed CO 2 has good thermal stability, non-flammability, high safety rating, and a higher density in engineering applications, with higher energy storage potential under the same conditions (Chae and Lee, 2022).

What is CO2 energy storage (CCES)?

Compressed carbon dioxide (CO 2) energy storage (CCES) is a promising approach that offers a multifaceted approach to address the dual challenge of meeting power needs while reducing greenhouse gas emissions.

How to reduce the energy consumption of CO2 energy storage systems?

However, considering the inconvenient use of renewable energy that may exist in CO 2 energy storage scenarios, in order to truly reduce the energy consumption of CO 2 energy storage systems, it is necessary to improve the internal energy conversion efficiency of the system based on the characteristics of the scenario.

Can a CO2 energy storage system outperform a conventional CO2 system?

It is indicated that the energy, exergy and emission reduction potential of the two cases can outperform the conventional CO 2 energy storage system combined cooling, heating and power at a peak time of 12 h.

How does a CO2 energy storage system work?

Since the fact that CO 2 energy storage systems typically involve multi-stage compression and multi-stage expansion, inter-stage cooling and heating are required to decrease and raise the temperature into the compressor and expander, respectively, ensuring the normal operation of the device.

Can cold energy be used in NGCC power plants?

However, in the case of NGCC, liquified natural gas (LNG) serves as a comparatively cleaner energy source, and its cold energy represents a high-quality, utilizable energy resource. Therefore, using LNG cold energy in NGCC power plants, Kim et al. (2023) proposed a cryogenic CO 2 capture process.