Off-design characteristics and operation strategy analysis of a compressed carbon dioxide energy storage system coupled with a combined heating and power plant

Tianyu He, Yue Cao, Fengqi Si and Kian Jon Chua

Energy, 2024, vol. 303, issue C

Abstract: To advance renewable energy development, it is crucial to increase the operational flexibility of power plants to consume renewable energy. Supercritical compressed carbon dioxide energy storage (SC-CCES) system is considered as a promising solution. This paper develops thermodynamic and off-design models for system components to formulate the system off-design model. The round-trip efficiency (RTE), system power efficiency (SPE), total exergy efficiency (TEE), and energy storage density (ESD) are defined to analyze the off-design performance of the system under two operation strategies. The results indicate that the system achieves the RTE of 32.44 %, SPE of 67.58 %, TEE of 43.26 %, and ESD of 1.73 kWh/m3 under the rated operating condition. The input power, output power, heat transfer rate, and mass flow rate during the charging and discharging process are proportional to the load level for both operation strategies. The RTE and TEE of the system vary inversely with the charging load level and directly with the discharging load level. The ESD is independent of the charging load level and increases with the discharging load level. The speed regulation-throttling regulation (SR-TR) operation strategy demonstrates superior system performance and a broader range of operating conditions.

Keywords: Energy storage system; Carbon dioxide; Component off-design model; Off-design analysis; Operation strategy (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544224017560
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:303:y:2024:i:c:s0360544224017560

DOI: 10.1016/j.energy.2024.131983

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().