Thermodynamic analysis of pumped thermal electricity storage

White, Abraham; Parks, GT; Markides, Christos N.

doi:10.1016/j.applthermaleng.2012.03.030

Cited by 177 publications

(98 citation statements)

References 6 publications

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“…However, this would require very short time steps and is in any case unnecessary since the unsteady gas terms in Eqs. (3)(4)(5) are generally very small. For example, in Eq.…”

Section: Governing Equationsmentioning

confidence: 99%

“…For accurate calculations Eqs. (3)(4)(5)(6) should be solved in a coupled fashion using, for example, a finite--volume time--marching approach. However, this would require very short time steps and is in any case unnecessary since the unsteady gas terms in Eqs.…”

Section: Governing Equationsmentioning

confidence: 99%

“…A more recent storage technology to emerge that also makes use of packed--bed thermal reservoirs is variously known as PHES (Pumped Heat Electricity Storage) [3], PTES (Pumped Thermal Energy Storage, [4,5]) or, in France, SEPT (Stockage d'Electricité par Pompage Thermique [6]). Here it will be referred to as PTES for consistency with the authors' previous publications and to avoid confusion with pumped hydro schemes.…”

Section: Introductionmentioning

confidence: 99%

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Wave propagation and thermodynamic losses in packed-bed thermal reservoirs for energy storage

2014

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This paper presents a numerical and theoretical analysis of thermal wave propagation in packed bed thermal reservoirs for energy storage applications. In such reservoirs, the range of temperatures encountered is usually such that the solid storage medium will exhibit significant changes in specific heat capacity. This in turn results in non--linear wave propagation and may lead to the formation of shock--like thermal fronts. Such effects have an impact on the exergetic losses due to irreversible heat transfer, and should be taken into account during the design and optimisation of the reservoirs. In the present paper, the emphasis is on thermal losses due to irreversible heat transfer. Frictional (pressure) losses and heat leakage between the storage medium and the environment are also important but are not considered here. The implications of the results for storage material, and particle size are discussed briefly in the context of loss minimisation. Keywords: energy storage, irreversible heat transfer, thermal reservoirs, exergetic loss. NOMENCLATURE

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“…However, this would require very short time steps and is in any case unnecessary since the unsteady gas terms in Eqs. (3)(4)(5) are generally very small. For example, in Eq.…”

Section: Governing Equationsmentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wave propagation and thermodynamic losses in packed-bed thermal reservoirs for energy storage

2014

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“…Thess [32] performed a theoretical work that includes "endoreversible" analysis of a generic system while White et al [33] and McTigue et al [34] studied thermodynamic aspects of Pumped Thermal Electricity Storage.…”

Section: Figure 2 Ptes Unit Proposed In [33]mentioning

confidence: 99%

State-of-the-art and future development of sensible heat thermal electricity storage systems

Benato¹,

Stoppato²,

Mirandola³

2017

IJHT

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Wind and solar energy have a variable and intermittent nature, a characteristic which forces fossil fuel thermal power plants to be used as backup units for grid stabilization. The development and installation of large-scale cost-effective energy storage systems is necessary to adapt electricity generated by renewables to the users' demand. But, the installation of conventional energy storage can add new capacity and further reduce the thermal power plants operational utilization factor. For these reasons, Integrated Energy Storage Systems need to be developed and installed. Pumped Thermal Electricity Storage (PTES) is an emerging technology which can offer a significant contribution to future large-scale electric storage applications. It is based on a high temperature heat pump cycle, which transforms electrical energy into thermal energy and stores it inside two thermal reservoirs, matched with a thermal engine cycle, which converts the stored thermal energy back into electrical energy. The thermal energy is stored as sensible heat in man-made reservoirs, one hot and one cold. In the present work, a detailed analysis of the available PTES configurations is presented underlining advantages, drawbacks and future development. Then, an innovative integrated energy storage unit is presented and compared with the existing ones.

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“…Peterson [12] and Henchoz et al [13] noted the effectiveness of sub-ambient temperature ETES. White et al [14] investigated the thermodynamic aspects of a pumped thermal electricity storage system, and showed that highly efficient compression and expansion processes are clearly required to obtain a satisfactory cycle efficiency. Meanwhile, the transcritical CO 2 Rankine cycle has been proposed to replace the Rankine cycle as the thermodynamic cycle, which is allowing for higher roundtrip efficiency in heat exchange process [15].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis for Heat Transfer Optimization in Subcritical Electrothermal Energy Storage Systems

Zhang

Chen

et al. 2017

Energies

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Electrothermal energy storage (ETES) provides bulk electricity storage based on heat pump and heat engine technologies. A subcritical ETES is described in this paper. Based on the extremum principle of entransy dissipation, a geometry model is developed for heat transfer optimization for subcritical ETES. The exergy during the heat transfer process is deduced in terms of entropy production. The geometry model is validated by the extremum principle of entropy production. The theoretical analysis results show that the extremum principle of entransy dissipation is an effective criterion for the optimization, and the optimum heat transfer for different cases with the same mass flux or pressure has been discussed. The optimum heat transfer can be achieved by adjusting the mass flux and pressure of the working fluid. It also reveals that with the increase of mass flux, there is a minimum exergy in the range under consideration, and the exergy decreases with the increase of the pressure.

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Thermodynamic analysis of pumped thermal electricity storage

Cited by 177 publications

References 6 publications

Wave propagation and thermodynamic losses in packed-bed thermal reservoirs for energy storage

Wave propagation and thermodynamic losses in packed-bed thermal reservoirs for energy storage

State-of-the-art and future development of sensible heat thermal electricity storage systems

Theoretical Analysis for Heat Transfer Optimization in Subcritical Electrothermal Energy Storage Systems

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