Potential and Evolution of Compressed Air Energy Storage: Energy and Exergy Analyses

Kim, Young‐Min; Lee, Janghee; Kim, Seok-Joon; Favrat, Daniel

doi:10.3390/e14081501

Cited by 145 publications

(79 citation statements)

References 19 publications

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“…The difference is around 1 MW, accounting therefore for roughly 6-7% of P EL,ST . Such value is expected to give a noticeable contribution to the actual electricity surplus generated during the discharge phase W NET and, consequently, to the storage efficiency defined according to Equation (7). The steam section part load model has been set up according to [25][26][27].…”

Section: Gas-steam Combined Cyclementioning

confidence: 99%

“…Quasi-isothermal compression and expansion are accomplished by exchanging heat with the surrounding environment by using heat transfer surfaces or a liquid medium in direct contact with the air. Solutions based on the adoption of liquid pistons appear too slow for industrial uses [7,8]. Concepts based on the addition of a liquid to absorb, store and release the heat to accomplish near isothermal compression and expansion processes are not yet mature for industrial applications [8].…”

Section: Introductionmentioning

confidence: 99%

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CAES Systems Integrated into a Gas-Steam Combined Plant: Design Point Performance Assessment

Salvini

2018

Energies

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Abstract:In the present paper, the performance of an energy storage concept based on the integration of a compressed air energy storage (CAES) system into a gas-steam combined cycle (GSCC) plant is investigated. CAES systems featured by different design specifications have been coupled with a commercially available small size GSCC plant. Storage efficiencies up to 65% have been evaluated for CAES design power output ranging from 5 to 10 MW. A techno-economic analysis aimed at assessing plant performance and investment costs has been performed. Despite the relatively high investment costs and the storage efficiency being less than those featuring alternative storage approaches, the proposed system may be considered of interest due to the long-life duration and the established technologies available for the key plant components.

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Section: Gas-steam Combined Cyclementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CAES Systems Integrated into a Gas-Steam Combined Plant: Design Point Performance Assessment

Salvini

2018

Energies

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“…Such condition can be obtained by comparing the energy present in thermal storages with the electric energy required by a heat pump to produce them, as the following relations [23]:…”

Section: Energy and Exergy Analysismentioning

confidence: 99%

“…The system at issue here is new and therefore the validation process was conducted by comparing it with other similar works, that are, to be more specific, the publications of Kim et al [7,23,24]. Both systems present the same configuration and are two tri-generation micro-CAES systems where the processes of compression and expansion are in quasi-isothermal condition.…”

Section: Model Validationmentioning

confidence: 99%

A New Tri-Generation System: Thermodynamical Analysis of a Micro Compressed Air Energy Storage

Vallati¹,

Grignaffini²,

Quintino³

et al. 2016

JEPE

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There is a growing interest in the electrical energy storage system, especially for matching intermittent sources of renewable energy with customers' demand. Furthermore, it is possible, with these system, to level the absorption peak of the electric network (peak shaving) and the advantage of separating the production phase from the exertion phase (time shift). CAES (compressed air energy storage systems) are one of the most promising technologies of this field, because they are characterized by a high reliability, low environmental impact and a remarkable energy density. The main disadvantage of big systems is that they depend on geological formations which are necessary to the storage. The micro-CAES system, with a rigid storage vessel, guarantees a high portability of the system and a higher adaptability even with distributed or stand-alone energy productions. This article carries out a thermodynamical and energy analysis of the micro-CAES system, as a result of the mathematical model created in a Matlab/Simulink ® environment.New ideas will be discussed, as the one concerning the quasi-isothermal compression/expansion, through the exertion of a biphasic mixture, that will increase the total system efficiency and enable a combined production of electric, thermal and refrigeration energies. The exergy analysis of the results provided by the simulation of the model reports that more than one third of the exergy input to the system is lost. This is something promising for the development of an experimental device.

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“…Energy and exergy flows of an isothermal CAES system for the production of 1 kWh output were already evaluated by [21].…”

Section: Objective Of the Experimental Investigationmentioning

confidence: 99%

Experimental Investigation on the Effect of Phase Change Materials on Compressed Air Expansion in CAES Plants

et al. 2015

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Abstract:The integration of renewable energy in the electrical grid is challenging due to the intermittent and non-programmable generated electric power and to the transmission of peak power levels. Several energy storage technologies have been studied to find a solution to these issues. In particular, compressed air energy storage (CAES) plants work by pumping and storing air into a vessel or in an underground cavern; then when energy is needed, the pressurized air is expanded in an expansion turbine. Several CAES configurations have been proposed: diabatic, adiabatic and isothermal. The isothermal process seems to be the most promising to improve the overall efficiency. It differs from conventional CAES approaches as it employs near-isothermal compression and expansion. Currently, there are no commercial isothermal CAES implementations worldwide, but several methods are under investigation. In this paper, the use of phase change materials (PCM) for isothermal air expansion is discussed. Air expansion tests in presence of PCM were carried out in a high-pressure vessel in order to analyze the effect of PCM on the process. Results show that in presence of PCM near isothermal expansion conditions occur and therefore they affect positively the value of the obtainable expansion work.

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Potential and Evolution of Compressed Air Energy Storage: Energy and Exergy Analyses

Cited by 145 publications

References 19 publications

CAES Systems Integrated into a Gas-Steam Combined Plant: Design Point Performance Assessment

CAES Systems Integrated into a Gas-Steam Combined Plant: Design Point Performance Assessment

A New Tri-Generation System: Thermodynamical Analysis of a Micro Compressed Air Energy Storage

Experimental Investigation on the Effect of Phase Change Materials on Compressed Air Expansion in CAES Plants

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