Thermodynamic analysis of the cascaded packed bed cryogenic storage based supercritical air energy storage system. (February 2019)

• Record Type: Journal Article
• Authors: Lin, Xipeng; Wang, Liang; Xie, Ningning; Li, Guoyue; Chen, Haisheng
• Is Part Of: Energy procedia. Volume 158(2019)
• Page Start: 5079
• Page End: 5085
• Publication Date: 2019-02
• Subjects: Supercritical air energy storagy -- Packed bed -- Cryogenic storage -- Exergy analysis; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2019.01.639
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: This paper presents a thermodynamic analysis of a novel stand-alone supercritical air energy storage (SAES) system, based on cascaded packed bed cryogenic storage. This system has the advantages of low cost, high efficiency and safety thanks to the different grade cryogenic energy be transferred and stored in two cascaded packed beds. Thermodynamic analysis results show that the discharge pressure and roundtrip efficiency are influenced by component efficiencies, charge pressure and middle temperature, and the optimized charge pressure and middle temperature are 120.0 bar and -70 ° C, respectively, no matter how component efficiencies changes. The increasing liquid air storage pressure reduces the exergy loss in evaporator and condenser and improves the round trip efficiency. Results show that a high round trip efficiency, which is up to 65% could be obtained in this novel supercritical air energy storage system.