Cyclic transient behavior of the Joule–Brayton based pumped heat electricity storage: Modeling and analysis

Wang, Liang; Lin, Xipeng; Chai, Lei; Peng, Long; Yu, Dong; Chen, Haisheng

doi:10.1016/j.rser.2019.03.056

Cited by 66 publications

(30 citation statements)

References 39 publications

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“…This should be considered in order to couple both cycles since a decrease in temperature is needed to pass from charge to discharge. The overall performance of the PHES system is defined in terms of the steady-state round trip efficiency [8], , as the ratio between power generated in the heat enginėand power input in the heat pumṗ. Considering both magnitudes as positive is given as:…”

Section: Overall Performancementioning

confidence: 99%

“…Methodologically, most of the models are based on computational fluid dynamic (CFD) simulations on the transient behavior [8], integration of solar energy [11] and/or commercial software through exergoeconomic analyses [17], and evaluation on thermal and mechanical performance of the hot tank [29]. Theoretical studies fully based on thermodynamic frameworks assuming Carnot-like models were conducted by Tess [30] and Chen et al [31], while works based on weak-dissipative models were reported by Guo et al for both pumped thermal [32] and cryogenic storage [33].…”

Section: Introductionmentioning

confidence: 99%

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Pumped heat energy storage with liquid media: Thermodynamic assessment by a Brayton-like model

Salomone-González

González-Ayala

Medina

et al. 2020

Energy Conversion and Management

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A thermodynamic model for a steady state pumped heat energy storage in liquid media is presented: it comprises a coupled Brayton-like heat pump and heat engine cycles connected to a cryogenic liquid and a hot molten salt by counter-flow heat exchangers. The model considers non-isothermal heat transfers between the working fluid and the liquid media and explicitly includes a set of parameters accounting for the main internal and external losses, heat leak, and pinch point effects for both the heat pump (charge) and heat engine (discharge) modes. Specific expressions for the main magnitudes in the charge (as the input power and coefficient of performance) and discharge (as power output and efficiency) modes and the global round trip efficiency have been analytically derived in terms of isentropic efficiencies of the compressor and turbine, pressure losses in the heat exchange processes, effectivenesses of the external counter-flow heat exchangers, and coupling between the working fluid and the storage and cryogenic liquid media. Round trip efficiencies around of 35 − 40% have been obtained, internal losses being those with main negative influence on the calculated values. The strong constraints imposed by the pinch point effects and liquid media have been analyzed. The model provides a thermodynamic assessment of the main involved processes and their interplay for a selected arrangement (molten salts, cryogenic fluid, and the charge and discharge power blocks) in order to check parametric strategies for thermodynamic optimization and design. These strategies are based on a reduced set of parameters of the overall installation and without the high computational costs of dynamical models.

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Section: Overall Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pumped heat energy storage with liquid media: Thermodynamic assessment by a Brayton-like model

Salomone-González

González-Ayala

Medina

et al. 2020

Energy Conversion and Management

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show abstract

“…While the recuperation does not significantly affect the performance of the cycle, it allows the storage temperatures to be chosen more flexibly, which is particularly useful for liquid storage media which have more limited operational ranges than solids. Part-load operation of closed cycles can be achieved using 'inventory control' [124] where the volume of working fluid in the cycle is adjusted. The pressure on the low-pressure side is adjusted proportionally, so that the volumetric flow through the turbomachinery remains constant.…”

Section: Open Versus Closed Cyclesmentioning

confidence: 99%

Progress and prospects of thermo-mechanical energy storage—a critical review

et al. 2021

Self Cite

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The share of electricity generated by intermittent renewable energy sources is increasing (now at 26% of global electricity generation) and the requirements of affordable, reliable and secure energy supply designate grid-scale storage as an imperative component of most energy transition pathways. The most widely deployed bulk energy storage solution is pumped-hydro energy storage (PHES), however, this technology is geographically constrained. Alternatively, flow batteries are location independent and have higher energy densities than PHES, but remain associated with high costs and short lifetimes, which highlights the importance of developing and utilizing additional larger-scale, longer-duration and long-lifetime energy storage alternatives. In this paper, we review a class of promising bulk energy storage technologies based on thermo-mechanical principles, which includes: compressed-air energy storage, liquid-air energy storage and pumped-thermal electricity storage. The thermodynamic principles upon which these thermo-mechanical energy storage (TMES) technologies are based are discussed and a synopsis of recent progress in their development is presented, assessing their ability to provide reliable and cost-effective solutions. The current performance and future prospects of TMES systems are examined within a unified framework and a thermo-economic analysis is conducted to explore their competitiveness relative to each other as well as when compared to PHES and battery systems. This includes carefully selected thermodynamic and economic methodologies for estimating the component costs of each configuration in order to provide a detailed and fair comparison at various system sizes. The analysis reveals that the technical and economic characteristics of TMES systems are such that, especially at higher discharge power ratings and longer discharge durations, they can offer promising performance (round-trip efficiencies higher than 60%) along with long lifetimes (>30 years), low specific costs (often below 100 $ kWh−1), low ecological footprints and unique sector-coupling features compared to other storage options. TMES systems have significant potential for further progress and the thermo-economic comparisons in this paper can be used as a benchmark for their future evolution.

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“…In this work, the PTES system will be analyzed over a single charge and discharge sequence. Figure 3 Overall performance of the energy storage cycle is usually evaluated through the round-trip efficiency, Φ [14]. It is defined as the ratio between the net energy obtained from storage during discharge and the net energy introduced into the system during the charge.…”

Section: Round-trip Efficiencymentioning

confidence: 99%

Thermodynamic Performance of a Brayton Pumped Heat Energy Storage System: Influence of Internal and External Irreversibilities

Pérez-Gallego

González-Ayala

Hernández

et al. 2021

Entropy

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A model for a pumped thermal energy storage system is presented. It is based on a Brayton cycle working successively as a heat pump and a heat engine. All the main irreversibility sources expected in real plants are considered: external losses arising from the heat transfer between the working fluid and the thermal reservoirs, internal losses coming from pressure decays, and losses in the turbomachinery. Temperatures considered for the numerical analysis are adequate for solid thermal reservoirs, such as a packed bed. Special emphasis is paid to the combination of parameters and variables that lead to physically acceptable configurations. Maximum values of efficiencies, including round-trip efficiency, are obtained and analyzed, and optimal design intervals are provided. Round-trip efficiencies of around 0.4, or even larger, are predicted. The analysis indicates that the physical region, where the coupled system can operate, strongly depends on the irreversibility parameters. In this way, maximum values of power output, efficiency, round-trip efficiency, and pumped heat might lay outside the physical region. In that case, the upper values are considered. The sensitivity analysis of these maxima shows that changes in the expander/turbine and the efficiencies of the compressors affect the most with respect to a selected design point. In the case of the expander, these drops are mostly due to a decrease in the area of the physical operation region.

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Cyclic transient behavior of the Joule–Brayton based pumped heat electricity storage: Modeling and analysis

Cited by 66 publications

References 39 publications

Pumped heat energy storage with liquid media: Thermodynamic assessment by a Brayton-like model

Pumped heat energy storage with liquid media: Thermodynamic assessment by a Brayton-like model

Progress and prospects of thermo-mechanical energy storage—a critical review

Thermodynamic Performance of a Brayton Pumped Heat Energy Storage System: Influence of Internal and External Irreversibilities

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