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Energies 2018, 11(12), 3405; https://doi.org/10.3390/en11123405

Energetical Analysis of Two Different Configurations of a Liquid-Gas Compressed Energy Storage

1
DIAEE Department, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
2
Institute of Thermal Power Engineering, Cracow University of Technology, al. Jana Pawla II 37, 31-864 Kracow, Poland
*
Author to whom correspondence should be addressed.
Received: 9 November 2018 / Revised: 26 November 2018 / Accepted: 30 November 2018 / Published: 4 December 2018
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Abstract

In order to enhance the spreading of renewable energy sources in the Italian electric power market, as well as to promote self-production and to decrease the phase delay between energy production and consumption, energy storage solutions are catching on. Nowadays, in general, small size electric storage batteries represent a quite diffuse technology, while air liquid-compressed energy storage solutions are used for high size. The goal of this paper is the development of a numerical model for small size storage, environmentally sustainable, to exploit the higher efficiency of the liquid pumping to compress air. Two different solutions were analyzed, to improve the system efficiency and to exploit the heat produced by the compression phase of the gas. The study was performed with a numerical model implemented in Matlab, by analyzing the variation of thermodynamical parameters during the compression and the expansion phases, making an energetic assessment for the whole system. The results show a good global efficiency, thus making the system competitive with the smallest size storage batteries. View Full-Text
Keywords: energy analysis; compressed air energy storage; heat exchange; electric power generation energy analysis; compressed air energy storage; heat exchange; electric power generation
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Vallati, A.; Colucci, C.; Oclon, P. Energetical Analysis of Two Different Configurations of a Liquid-Gas Compressed Energy Storage. Energies 2018, 11, 3405.

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