Thermal analysis of a compressor for application to Compressed Air Energy Storage

Zhang, Chao; Yan, Bo; Wieberdink, J; Li, Perry Y.; Ven, James D. Van de; Loth, Eric; Simon, Terrence W.

doi:10.1016/j.applthermaleng.2014.08.014

Cited by 68 publications

(30 citation statements)

References 14 publications

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“…To achieve the efficient compression and expansion under near-isothermal conditions, the team inserted porous media in the compressor's chamber, such as foams and interrupted-plate inserts. The computational results confirmed that inserts were very effective in suppressing temperature rises during compression [70]. Figure 16.…”

Section: ) Compressorssupporting

confidence: 69%

Overview of Compressed Air Energy Storage and Technology Development

et al. 2017

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With the increase of power generation from renewable energy sources and due to their intermittent nature, the power grid is facing the great challenge in maintaining the power network stability and reliability. To address the challenge, one of the options is to detach the power generation from consumption via energy storage. The intention of this paper is to give an overview of the current technology developments in compressed air energy storage (CAES) and the future direction of the technology development in this area. Compared with other energy storage technologies, CAES is proven to be a clean and sustainable type of energy storage with the unique features of high capacity and long-duration of the storage. Its scale and cost are similar to pumped hydroelectric storage (PHS), thus CAES has attracted much attention in recent years while further development for PHS is restricted by the availability of suitable geological locations. The paper presents the state-of-the-art of current CAES technology development, analyses the major technological barriers/weaknesses and proposes suggestions for future technology development. This paper should provide a useful reference for CAES technology research and development strategy.

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Section: ) Compressorssupporting

confidence: 69%

Overview of Compressed Air Energy Storage and Technology Development

et al. 2017

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“…The efficiency of the system is a function of the pressure and can be calculated from equation (5) energy stored within the cylinder as at the two values of cylinder pressure (2 and 3 bar) for an isothermal process [13,14]. Performing the simple substitution at respective pressure values, the system efficiency is calculated to be 64.8% and 84.8% for 2 and 3 bar internal pressure cases, respectively.…”

Section: Compressed Air Resultsmentioning

confidence: 99%

“…These high pressures, however, cause a significant temperature rise of air during compression, which requires heat removal before storage, then eventual heat supply during discharge to prevent freezing of water vapor during expansion [6][7][8]. Modeling of CAES systems involve many assumptions depending on their size and discharge rate (power density), while smaller systems suffer insignificant temperature changes and thus can be modeled as isothermal [9], large insulated systems can be modeled as adiabatic [10,11], while diabatic systems utilizing intercoolers approach isothermal compression behavior [12,13]. CAES systems have the advantage over other storage options by being non-toxic as they utilize no dangerous chemicals and having long service lives [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Experimental assessment of compressed air energy storage (CAES) system and buoyancy work energy storage (BWES) as cellular wind energy storage options

Alami

2015

Journal of Energy Storage

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“…The air drives an air motor or a turbine, which in turn drives an electric generator that supplies power to consumers. SS-CAES is also potentially an alternative choice for use with renewable sources [4,5,6,12,21,36,37,38]. It is obviously environmentally friendly due to pure air being the only energy source for the charging and discharging processes.…”

Section: Ss-caes Systemmentioning

confidence: 99%

Maximum Power Point Tracking of a Small-Scale Compressed Air Energy Storage System

Kokaew

Sharkh²,

Moshrefi-Torbati

2016

IEEE Trans. Ind. Electron.

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The thesis is concerned with a small-scale compressed air energy storage (SS-CAES) system. Although these systems have relatively low energy density, they offer advantages of low environmental impact and ease of maintenance.The thesis focuses on solving a number of commonly known problems related to the perturb and observe (P&O) maximum power point tracking (MPPT) system for SS-CAES, including confusion under input power fluctuation conditions and operating point dither.A test rig was designed and built to be used for validation of the theoretical work. The rig comprised an air motor driving a permanent magnet DC generator whose power output is controlled by a buck converter. A speed control system was designed and implemented using a dSPACE controller. This enabled fast convergence of MPPT.Four MPPT systems were investigated. In the first system, the air motor characteristics were used to determine the operating speed corresponding to MPP for a given pressure. This was compared to a maximum efficiency point tracking (MEPT) system. Operating at the maximum power point resulted in 1% loss of efficiency compared to operating at the maximum efficiency point. But MPPT does not require an accurate model of the system that is needed for MEPT, which also requires more sensors.The second system that was investigated uses a hybrid MPPT approach that did not require a prior knowledge system model. It used the rate of change of power output with respect to the duty cycle of the buck converter as well as the change in duty cycle to avoid confusion under input power fluctuations. It also used a fine speed step in the vicinity of the MPP and a coarse speed step when the operating point was far from the MPP. Both simulation and experimental results demonstrate the efficiency of this proposed system. The third P&O MPPT system used a fuzzy logic approach which avoided confusion and eliminated operating point dither. This system was also implemented experimentally.A speed control system improved the controllable speed-range by using a buck-boost converter instead. The last MPPT system employed a hybrid P&O and incremental inductance (INC) approach to avoid confusion and eliminate operating point dither. The simulation results validate the design.Although the focus of the work is on SS-CAES, the results are generic in nature and could be applied to MPPT of other systems such as PV and wind turbine.

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Thermal analysis of a compressor for application to Compressed Air Energy Storage

Cited by 68 publications

References 14 publications

Overview of Compressed Air Energy Storage and Technology Development

Overview of Compressed Air Energy Storage and Technology Development

Experimental assessment of compressed air energy storage (CAES) system and buoyancy work energy storage (BWES) as cellular wind energy storage options

Maximum Power Point Tracking of a Small-Scale Compressed Air Energy Storage System

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