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Thermodynamic and exergy analysis of a combined pumped hydro and compressed air energy storage system


Mozayeni, H and Wang, X and Negnevitsky, M, Thermodynamic and exergy analysis of a combined pumped hydro and compressed air energy storage system, Sustainable Cities and Society, 48 Article 101527. ISSN 2210-6707 (2019) [Refereed Article]

Copyright Statement

2019 Elsevier Ltd. All rights reserved.

DOI: doi:10.1016/j.scs.2019.101527


renewable energy sources such as wind and solar. In this paper, a comprehensive thermodynamic and exergy model is developed to study the thermal characteristics of a combined Pumped-Hydro and Compressed-Air (PHCA) energy storage system. The effect of key parameters, including storage pressure, pre-set pressure, aircompression mode and pump/hydroturbine efficiency on system performance is investigated. The results showed that an optimum pre-set pressure existed to maximize energy storage level for a specific storage pressure. The storage pressure also showed a large effect on the energy storage level and work output. As the storage pressure increased from 4 to 16 MPa, the energy storage level and work output increased remarkably. Furthermore, the performance of a PHCA system was largely influenced by the air compression/expansion mode in the energy storage vessel. The PHCA system stored 10% more energy through an isothermal compression process than that through an isentropic air compression process. It generated 14% more work output through an isothermal expansion process than that through an isentropic air expansion process. The exergy analyses showed that exergy destruction in pump was about 15% higher than that in hydroturbine.

Item Details

Item Type:Refereed Article
Keywords:pumped hydro, compressed air, thermodynamic analysis, exergy analysis, energy storage
Research Division:Engineering
Research Group:Mechanical engineering
Research Field:Energy generation, conversion and storage (excl. chemical and electrical)
Objective Division:Energy
Objective Group:Energy storage, distribution and supply
Objective Field:Energy storage (excl. hydrogen and batteries)
UTAS Author:Mozayeni, H (Mr Hamidreza Mozayeni)
UTAS Author:Wang, X (Professor Xiaolin Wang)
UTAS Author:Negnevitsky, M (Professor Michael Negnevitsky)
ID Code:132290
Year Published:2019
Web of Science® Times Cited:37
Deposited By:Engineering
Deposited On:2019-05-02
Last Modified:2019-07-29

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