Exergoeconomic Analysis of a Pumped Heat Electricity Storage System with Concrete Thermal Energy Storage

Dietrich, Axel; Dammel, Frank; Stephan, Peter

doi:10.5541/ijot.5000156078

Cited by 16 publications

(12 citation statements)

References 10 publications

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“…• PTES based on a Brayton cycle with packed beds [6][7][8][9], sensible molten salt [5] or concrete as thermal storages [10,11]. • PTES based on transcritical CO2 with water as hot storage and latent water/ice as cold storage [12][13][14].…”

Section: A Pumped Thermal Energy Storage (Ptes)mentioning

confidence: 99%

Energy system design for deep decarbonization of a sunbelt city by using a hybrid storage approach

Walter¹,

Huber²,

Kueppers³

et al. 2019

Proceedings of the 13th International Renewable Energy Storage Conference 2019 (IRES 2019)

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With continuously falling cost of renewable power generation and ambitious decarbonization targets, renewable sources are about to rival fossil fuels for energy supply. For a high share of fluctuating renewable generation, large-scale energy storage is likely to be required. In addition to selling electricity, the reliable supply of heat and cold is a further interesting revenue pool, which makes hybrid storage technologies an interesting option. The main feature of hybrid energy storageas defined here-is to offer charging and especially discharging in different forms of energy by combining different charging, discharging and storage devices. They can address various demands (e.g. electricity and cold) simultaneously. Two hybrid storages, pumped thermal energy storage (PTES) and power-to-heat-to-x (x: heat and/or electricity) energy storage (PHXES), are investigated based on a technoeconomic analysis within this work. Both hybrid storage technologies are charged with electricity and can supply heat and electricity during discharging. They are implemented into a simplified energy system model of a prototype city in the earth's sunbelt in the year 2030 to find a cost-optimal configuration. Different cases are evaluated: a power-to-power case (P2P), where only an electric demand must be addressed and a power-topower-and-cooling (P2P&C) case, where the electric demand from the P2P case is divided into a residual electric demand and a cooling demand. For both cases, a natural gas-based benchmark scenario and a decarbonized, renewable-based scenario including the hybrid energy storage technologies are calculated. Both, total expenditures and CO2 emissions are lower in the P2P&C scenarios compared to P2P scenarios. PHXES plays a major role in both cases. PTES is part of the costoptimal solution in the P2P&C decarb scenario, only if its specific cost are further decreased.

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Section: A Pumped Thermal Energy Storage (Ptes)mentioning

confidence: 99%

Energy system design for deep decarbonization of a sunbelt city by using a hybrid storage approach

Walter¹,

Huber²,

Kueppers³

et al. 2019

Proceedings of the 13th International Renewable Energy Storage Conference 2019 (IRES 2019)

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“…The adaptions made on the basic storage model to simulate a sensible heat TES in the form of a massive block traversed by multiple pipes are described in. 24 To enhance heat transfer between working fluid and storage material, the storage material is integrated in the form of a packed bed instead of a massive block.…”

Section: Sensible Heat Thermal Energy Storage Subsystemsmentioning

confidence: 99%

Exergoeconomic analysis of a pumped heat electricity storage system based on a Joule/Brayton cycle

Dietrich

Dammel

Stephan

2020

Energy Science & Engineering

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The share of renewable energy sources in the German gross electrical energy production was rising from 3.6% in 1990 up to 40.2% in 2019. 1 Extrapolating the trend shown in Figure 1, higher shares of renewable energy sources can be expected in the future. Adopted in July 2016, the newest version of the Act on the Development of Renewable Energy Sources (Gesetz für den Ausbau Erneuerbarer Energien, EEG 2016) targets to rise the share of renewable energy sources in gross electrical energy consumption to 40% in 2025, 55% in 2035, and 80% in 2050. 2 The higher the share of renewables, the stronger is the impact of the volatility of renewable energy sources on the production of electrical energy. More and more frequently, this results in a mismatch between the electrical energy supply and its demand. To maintain stability in the grid, supply and demand of electrical energy have to be balanced, because the grid itself cannot store electrical energy. Up to a certain degree, balancing of supply and demand can be achieved by flexible operation of power plants and load balancing. However, to reach the targets of the EEG 2016, medium-to large-scale storage systems for electrical energy are required.Electrochemical accumulators have limitations in cyclic stability and require relatively large amounts of rare

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“…Kim et al show that, for a traditional vapor compression process bearing a typical back-work-ratio of 36.5% and assuming realistic grid-scale efficiencies of 80% for each machinery, the best RTE which can be attained in theory by high-speed trans-critical circuit PTES is 45% [24]. Dietrich et al realized in 2016 a model using butane as the working fluid and computed a maximum RTE of 27.3% only [8]. While the Siemens Gamesa company expects a full-scale deployed system to reach in the future round-trip efficiencies of 50%, a RTE of only 25% has been so-far obtained in June 2019 in Hamburg, Germany, after several years of development on a pilot plant of 130 MWh per week [9].…”

Section: Economic Targets Of the Uphes-ptes Hybrid Long-duration Storagementioning

confidence: 99%

“…Unfortunately, as far as pilot systems are concerned, the RTEs of present PTES currently hover around 25%-30% due to the limited efficiencies of two compressors and of two expanders working in gaseous or supercritical phase and due to other thermodynamic irreversibilities. For instance, Dietrich et al realized in 2016 a model using butane as the working fluid and computed a maximum RTE of 27.3% [8]. While the Siemens Gamesa company expects a full-scale deployed system to reach in the future round-trip efficiencies of 50%, a RTE of only 25% has been so-far obtained in June 2019 in Hamburg, Germany after several years of development on a pilot plant of 130 MWh per week [9].…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Pumped Thermal Electricity Storages—Converting Energy Using Shallow Lined Rock Caverns, Carbon Dioxide and Underground Pumped-Hydro

Lalanne

Byrne

2019

Applied Sciences

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A fast-paced energy transition needs a higher penetration of renewables, of heating and cooling in the worldwide energy mix. With three novelties 1-of using shallow high-pressure LRC (Lined Rock Cavern) excavated close to storage needs, 2-of using a slow-moving CO2 piston applying steady pressure on the hydro part of UPHES (Underground Pumped Hydro Energy Storage) and 3-of relying on inexpensive thermal stores for long-duration storage, CO2 UPHES coupled with PTES (Pumped Thermal Electricity Storage) could become, at expected Capex cost of only 20 USD/kWh electrical, a game-changer by allowing the complete integration of intermittent renewable sources. Moreover, even though this early conceptual work requires validation by simulation and experimentation, CO2 UPHES as well as UPHES-PTES hybrid storage could also allow a low-cost and low-emission integration of intermittent renewables with future district heating and cooling networks.

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Exergoeconomic Analysis of a Pumped Heat Electricity Storage System with Concrete Thermal Energy Storage

Cited by 16 publications

References 10 publications

Energy system design for deep decarbonization of a sunbelt city by using a hybrid storage approach

Energy system design for deep decarbonization of a sunbelt city by using a hybrid storage approach

Exergoeconomic analysis of a pumped heat electricity storage system based on a Joule/Brayton cycle

Large-Scale Pumped Thermal Electricity Storages—Converting Energy Using Shallow Lined Rock Caverns, Carbon Dioxide and Underground Pumped-Hydro

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