Demonstration of High-Temperature Calcium-Based Thermochemical Energy Storage System for use with Concentrating Solar Power Facilities

Muto, Andrew; Hansen, Tim

doi:10.2172/1501361

Cited by 4 publications

(3 citation statements)

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“…The results of the current work can be compared on the one hand to other energy storage processes through the BESP values, and on the other hand to other CO2 capture systems through the cost of capture expressed in $/tCO2-captured. As examples of the former, Ganwal et al [19] have reported a cost of 56-59 $/MWhe for a CaL storage process with a synthetic material of xcarb = 0.4, which is comparable to the cost obtained in this work (see Figure 6). Michalski et al [23] have reported a levelized cost of electricity (LCOE) of 80-95 $/MWhe, although their study considered retrofitting a coal power plant.…”

Section: Resultssupporting

confidence: 80%

“…Moreover, Ortiz et al [15] have published an in-depth review of the different process schemes, conditions, and materials that are advantageous for the operation of the TCES-CSP application. Bayon et al [18] have conducted a techno-economic comparison of the capital (excluding the reactors) and operational costs of 17 gas-solids TCES systems, arriving at a cost for CaL-TCES of 54 $/kWht (note that this cost is expressed per storage capacity), as compared to the cost of 56-59 €/MWhe estimated by Muto et al [19] for a CaL-TCES process using a synthetic sorbent. Nevertheless, detailed studies with cost estimations for the combined CaL-TCES process are scarce, due to the early stage of development of this technology [20,21].…”

Section: Introductionmentioning

confidence: 99%

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Techno-Economic Assessment of Calcium Looping for Thermochemical Energy Storage with CO2 Capture

et al. 2021

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The cyclic carbonation-calcination of CaCO3 in fluidized bed reactors not only offers a possibility for CO2 capture but can at the same time be implemented for thermochemical energy storage (TCES), a feature which will play an important role in a future that has an increasing share of non-dispatchable variable electricity generation (e.g., from wind and solar power). This paper provides a techno-economic assessment of an industrial-scale calcium looping (CaL) process with simultaneous TCES and CO2 capture. The process is assumed to make profit by selling dispatchable electricity and by providing CO2 capture services to a certain nearby emitter (i.e., transport and storage of CO2 are not accounted). Thus, the process is connected to two other facilities located nearby: a renewable non-dispatchable energy source that charges the storage and a plant from which the CO2 in its flue gas flow is captured while discharging the storage and producing dispatchable electricity. The process, which offers the possibility of long-term storage at ambient temperature without any significant energy loss, is herein sized for a given daily energy input under certain boundary conditions, which mandate that the charging section runs steadily for one 12-h period per day and that the discharging section can provide a steady output during 24 h per day. Intercoupled mass and energy balances of the process are computed for the different process elements, followed by the sizing of the main process equipment, after which the economics of the process are computed through cost functions widely used and validated in literature. The economic viability of the process is assessed through the breakeven electricity price (BESP), payback period (PBP), and as cost per ton of CO2 captured. The cost of the renewable energy is excluded from the study, although its potential impact on the process costs if included in the system is assessed. The sensitivities of the computed costs to the main process and economic parameters are also assessed. The results show that for the most realistic economic projections, the BESP ranges from 141 to −20 $/MWh for different plant sizes and a lifetime of 20 years. When the same process is assessed as a carbon capture facility, it yields a cost that ranges from 45 to −27 $/tCO2-captured. The cost of investment in the fluidized bed reactors accounts for most of the computed capital expenses, while an increase in the degree of conversion in the carbonator is identified as a technical goal of major importance for reducing the global cost.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Techno-Economic Assessment of Calcium Looping for Thermochemical Energy Storage with CO2 Capture

et al. 2021

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“…They were able to demonstrate operation of this system through short charging and discharging periods. They also conducted a techno-economic analysis (TEA) to estimate cost per kWh th of energy stored, and translated this to an LCOE [19]. In 2019, they attained a patent for the system [20].…”

Section: Introductionmentioning

confidence: 99%

Application of the Calcium Looping Process for Thermochemical Storage of Variable Energy

2023

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The calcium looping (CaL) process, which exploits the reversible calcination of calcium carbonate, has been proposed as a solution to the challenges facing deployment of concentrated solar power (CSP). As an extension of the work undertaken to date, this project proposes a novel configuration of the CSP-CaL process which may offer advantages over other proposed configurations, including a reduction in process equipment requirements, elimination of pressure differentials between vessels, and a reduction in compression duty during the energy discharge period. The results obtained through process simulation indicate that the proposed process can achieve round-trip efficiencies in the range of 32–46% and energy storage densities in the range of 0.3–1.0 GJ/m3. These parameters are strongly dependent on the residual conversion of the CaO sorbent as well as the efficiency of the power cycles used to remove heat on the carbonator side of the process.

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Role of particle size on the cohesive behavior of limestone powders at high temperature

Espin

Durán-Olivencia

Valverde

2020

Chemical Engineering Journal

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Demonstration of High-Temperature Calcium-Based Thermochemical Energy Storage System for use with Concentrating Solar Power Facilities

Cited by 4 publications

References 0 publications

Techno-Economic Assessment of Calcium Looping for Thermochemical Energy Storage with CO2 Capture

Techno-Economic Assessment of Calcium Looping for Thermochemical Energy Storage with CO2 Capture

Application of the Calcium Looping Process for Thermochemical Storage of Variable Energy

Role of particle size on the cohesive behavior of limestone powders at high temperature

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