Potential analysis of pumped heat electricity storages regarding thermodynamic efficiency

Roskosch, Dennis; Venzik, Valerius; Atakan, Burak

doi:10.1016/j.renene.2018.09.023

Cited by 24 publications

(2 citation statements)

References 21 publications

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“…To be fair, LAES, and analogous systems, may also benefit from the use of waste heat. However, LAES internally produces and recovers heat up to 200 • C from the charge phase [38,39]. Therefore, low-temperature heat sources may not be useful.…”

Section: Carnot Batteriesmentioning

confidence: 99%

Rankine Carnot Batteries with the Integration of Thermal Energy Sources: A Review

2020

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This paper provides an overview of a novel electric energy storage technology. The Thermally Integrated Pumped Thermal Electricity Storage (TI-PTES) stores electric energy as thermal exergy. Compared to standard PTES, TI-PTES takes advantage of both electric and low-temperature heat inputs. Therefore, TI-PTES is a hybrid technology between storage and electric production from low-temperature heat. TI-PTES belongs to a technology group informally referred to as Carnot Batteries (CBs). As the TI-PTES grows in popularity, several configurations have been proposed, with different claimed performances, but no standard has emerged to date. The study provides an overview of the component and operating fluid selection, and it describes the configurations proposed in the literature. Some issues regarding the performance, the ratio between thermal and electrical inputs, and the actual TI-PTES utilisation in realistic scenarios are discussed. As a result, some guidelines are defined. The configurations that utilise high-temperature thermal reservoirs are more extensively studied, due to their superior thermodynamic performance. However, low-temperature TI-PTES may achieve similar performance and have easier access to latent heat storage in the form of water ice. Finally, to achieve satisfactory performance, TI-PTES must absorb a thermal input several times larger than the electric one. This limits TI-PTES to small-scale applications.

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Section: Carnot Batteriesmentioning

confidence: 99%

Rankine Carnot Batteries with the Integration of Thermal Energy Sources: A Review

2020

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“…On the basis of the formula developed by Thess, 61 which was later corrected by Chen and Guo, 62 a limit of η rt = 40.15% results for the present configurations. According to the analysis by Roskosch et al, 63 which attempts to use realistic simple Rankine cycles as a basis, a limit of approximately η rt = 47% emerges. The round‐trip efficiencies in this study are relatively close to these values, hence it is assumed that the configurations presented are reasonable for the selected storage and ambient temperature.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO₂ charging process

Bodner

Koksharov

Dammel

et al. 2023

Energy Science & Engineering

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Pumped thermal energy storage (PTES) is a technology for intermediate storage of electrical energy in the form of thermal energy. In this work, PTES systems based on a transcritical CO2 charging process are investigated. A two‐zone water storage tank with a storage temperature of 115°C is used as thermal energy storage. For discharge, an Organic Rankine Cycle (ORC) and, alternatively, a transcritical CO2 heat engine are investigated. The considered concepts are modelled and simulated as stationary processes using the EBSILON Professional software. The scaling is based on an electrical input power of 5 MW. Using an ORC with the working fluid R1234yf for the discharging process results in the highest round‐trip efficiency of 36.8%. The component costs of the different configurations are estimated using cost functions. On the basis of this, the levelized cost of storage (LCOS) is calculated. The configuration with the ORC as the discharging process has the lowest LCOS of 59.2 €cents (kWh)−1. In addition, the technological maturity is determined using the technology readiness level scale. There are no prototypes of the investigated PTES systems yet. Therefore, further investigations must be carried out to implement the technology in the future.

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Pumped heat storage system

Arabkoohsar

2021

Mechanical Energy Storage Technologies

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Potential analysis of pumped heat electricity storages regarding thermodynamic efficiency

Cited by 24 publications

References 21 publications

Rankine Carnot Batteries with the Integration of Thermal Energy Sources: A Review

Rankine Carnot Batteries with the Integration of Thermal Energy Sources: A Review

Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO₂ charging process

Pumped heat storage system

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Potential analysis of pumped heat electricity storages regarding thermodynamic efficiency

Cited by 24 publications

References 21 publications

Rankine Carnot Batteries with the Integration of Thermal Energy Sources: A Review

Rankine Carnot Batteries with the Integration of Thermal Energy Sources: A Review

Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO2 charging process

Pumped heat storage system

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Product

Resources

About

Analysis of low‐temperature pumped thermal energy storage systems based on a transcritical CO₂ charging process