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Transcritical carbon dioxide cycle as a way to improve the efficiency of a Liquid Air Energy Storage system.
- Source :
-
Renewable Energy: An International Journal . Aug2022, Vol. 196, p1385-1391. 7p. - Publication Year :
- 2022
-
Abstract
- The article deals with the subject of energy storage. This important issue relates to the ongoing transformation toward renewable energy sources. Liquid Air Energy Storage (LAES) is a mechanical energy storage technology that is suitable for large-scale energy storage. The article presents a method to increase the efficiency of LAES by coupling it with the transcritical carbon dioxide cycle. To this end, the paper presents a numerical analysis of two Kapitza LAES systems with the transcritical CO 2 cycle: in parallel and subsequent mode. In both cases, maximizing CO 2 pressure contributes to greater overall efficiency. It is only profitable to direct residual heat to the CO 2 cycle. In contrast, lowering the air temperature prior to expansion in hopes of providing a greater amount of heat to the CO 2 cycle actually delivers worse results. Parallel system implementation can add 5–6% to storage efficiency, depending on other factors. In comparison, the subsequent system only adds some 3.5%–5% to storage efficiency. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09601481
- Volume :
- 196
- Database :
- Academic Search Index
- Journal :
- Renewable Energy: An International Journal
- Publication Type :
- Academic Journal
- Accession number :
- 158888874
- Full Text :
- https://doi.org/10.1016/j.renene.2022.07.093