Pumped Thermal Energy Storage and Bottoming System Part B: Sensitivity analysis and baseline performance

Abarr, Miles; Hertzberg, Jean; Montoya, Lupita D.

doi:10.1016/j.energy.2016.11.028

Cited by 27 publications

(8 citation statements)

References 5 publications

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“…During the charging process of the energy storage, heat is pumped from cold reservoirs (CRs) to hot reservoirs (HRs) via a heat pump circle and then stored; during the discharging process electricity is generated by the stored thermal energy through the heat-work conversion circle. Owning to the advantages of its high energy density and high efficiency, PHES has captured the attention of researchers as a promising technology for large-scale energy storage in recent years [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. The categories of the PHES systems is mainly based on two types of reversible heat-work conversion circles thus far: The Joule-Brayton cycles [25][26][27][28][29][30][31] and the Rankine cycles [14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…proposed the use of a PTES and bottoming system based on the transcritical ammonia cycle connected to a natural-gas peak plant and the obtained result indicates that the stand-alone energy storage efficiencies is between 51%-66% with a stand-alone bottoming efficiency of 24% [19,20]. presented a PTES system based on the Joule-Brayton cycle with a buffer vessel and performed a theoretical analysis on the PTES system coupled with a packed bed model of the HRs and CRs [29].…”

Section: Introductionmentioning

confidence: 99%

“…Under the situations in this study, the maximum absolute value of angular acceleration of the expander rotor and the compressor rotor is 0.0063 rad/s2 and 0.0026 rad/s2 respectively, and the corresponding Pe(t) and Pc(t) is -3.47 kW and 0.36 kW, which are less than ±0.04% of the transient shaft power and can be neglected. By bringing equation (3), (4) into equation (15), (16), and neglecting the unsteady variation of the turbine machines, the transient specific energy can be calculated using equation (19) for the charging process and equation (20)for the discharging process. Where echr and edis are specific energy (J/kg) of shaft work during charging and discharging, Tc,in and Te,in are the inflow temperatures (K) of the compressor and the expander during charging, and the superscript are many, could be arranged.…”

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confidence: 99%

See 2 more Smart Citations

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

Wang

Lin

Chai

et al. 2019

Renewable and Sustainable Energy Reviews

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Pumped heat electricity storage (PHES) has the advantages of a high energy density and high efficiency and is especially suitable for large-scale energy storage. The performance of PHES has attracted much attention which has been studied mostly based on steady thermodynamics, whereas the transient characteristic of the real energy storage process of PHES cannot be presented. In this paper, a transient analysis method for the PHES system coupling dynamics, heat transfer, and thermodynamics is proposed. Judging with the round trip efficiency and the stability of delivery power, the energy storage behavior of a 10 MW/4 h PHES system is studied with argon and helium as the working gas. The influencing factors such as the pressure ratio, polytropic efficiency, particle diameters, structure of thermal energy storage reservoirs are also analyzed. The results obtained indicate that, mainly owing to a small resistance loss, helium with a round-trip efficiency of 56.9% has an overwhelming advantage over argon with an efficiency of 39.3%. Furthermore, the increases in the pressure ratio and isentropic efficiencies improve the energy storage performance considerably. There also exit optimal values of the delivery compression ratio, particle sizes, length-to-diameter ratios of the reservoirs, and discharging durations corresponding to the maximum round-trip efficiency and preferable discharging power stability. The above can provide a basis for the optimal design and operation of the Joule-Brayton based PHES.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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

Wang

Lin

Chai

et al. 2019

Renewable and Sustainable Energy Reviews

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“…Although system variants with CO 2 as the working fluid have received most of the research focus in the field of transcritical PTES systems so far, schemes based on other working fluids are also possible. In 2016, Abarr et al [151,152] proposed a transcritical PTES system based on ammonia. The system operates at higher temperatures and is designed to be able to function either independently or as a bottoming cycle coupled to a gas peaking power plant.…”

Section: Advanced Joule-brayton Ptes Designsmentioning

confidence: 99%

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

et al. 2021

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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 respect of the latter, the authors in Ref. [47] specify a pressure limit of 250 bar based on published values for supercritical steam plant.) Ultimately, the best choices require a full thermo-economic optimisation, but this is beyond the scope of the present study.…”

Section: Selection Of Operating Conditionsmentioning

confidence: 99%

Thermodynamic analysis and optimisation of a combined liquid air and pumped thermal energy storage cycle

Farres-Antunez

Xue

White

2018

Journal of Energy Storage

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Pumped thermal energy storage (PTES) and liquid air energy storage (LAES) are two large-scale electricity storage technologies that store energy in the form of thermal exergy. This is achieved by operating mechanicallydriven thermodynamic cycles between thermally insulated storage tanks. Both technologies are free from geographic restrictions that apply to pumped hydro and most compressed air storage. The present paper describes a novel, combined system in which PTES operates as a topping cycle and LAES as a bottoming cycle. The fundamental advantage is that the cold thermal reservoirs that would be required by the two separate cycles are replaced by a single heat exchanger that acts between them, thereby saving significant amounts of storage media per unit of energy stored. In order to reach cryogenic temperatures, the PTES cycle employs helium as the working fluid, while the LAES cycle uses supercritical air (at around 150 bar) which is cooled sufficiently to be fully liquefied upon expansion, thus avoiding recirculation of leftover vapour. A thermodynamic study of a baseline configuration of the combined cycle is presented and results are compared with those of the separate systems. These indicate that the new cycle has a similar round-trip efficiency to that of the separate systems while providing a significantly larger energy density. Furthermore, three adaptations of the base-case combined cycle are proposed and optimised. The best of these adaptations achieves an increase in thermodynamic efficiency of about 10 percent points (from 60 % to 70 %), therefore significantly exceeding the individual cycles in both energy density and efficiency.

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Pumped Thermal Energy Storage and Bottoming System Part B: Sensitivity analysis and baseline performance

Cited by 27 publications

References 5 publications

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

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

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

Thermodynamic analysis and optimisation of a combined liquid air and pumped thermal energy storage cycle

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