Numerical study on the hydrodynamic and thermodynamic properties of compressed carbon dioxide energy storage in aquifers

Li, Yang; Yu, Hao; Liu, Yaning; Zhang, Guijin; Tang, Dong; Jiang, Zhongming

doi:10.1016/j.renene.2019.11.135

Cited by 32 publications

(2 citation statements)

References 30 publications

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“…Additionally, CCUS includes the associated CO 2 storage incidental to enhanced oil recovery (EOR), or dedicated CO 2 storage in saline formations. Yi et al 2020 studied the hydrodynamic and thermodynamic properties of CO 2 during compressed carbon dioxide energy storage in aquifers (CCES-A) through numerical simulation [17].…”

Section: Introductionmentioning

confidence: 99%

A Thermodynamic Model for Carbon Dioxide Storage in Underground Salt Caverns

Zhang

Chen

2022

Energies

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In the context of green energy and decarbonization, carbon dioxide storage in underground facilities, such as salt caverns, is one promising technical solution that has aroused attention. However, the thermodynamic behavior of CO2 and the geomechanical response of salt cavities have not been studied comprehensively. In this study, we proposed a thermomechanical model that integrated a salt cavity and wellbore and implemented a series of simulations for carbon dioxide storage in a salt cavern. The model was verified by gas capacity calculations using field testing data. The thermodynamic behaviors of CO2 were determined and compared to methane. The results showed that the critical point coordinates of carbon dioxide were within the storage operation conditions, a phase transition could occur, and the thermodynamic properties around the critical point varied dramatically. For a short CO2 withdrawal operation, the salt cavity remained stable, while the near-wellbore area (NWA) was prone to fracture due to tensile stress concentration. Thus, we concluded that the proposed thermomechanical coupling numerical simulation method provided a comprehensive and quantitative tool for the feasibility analysis of CO2 storage in underground salt caverns.

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Section: Introductionmentioning

confidence: 99%

A Thermodynamic Model for Carbon Dioxide Storage in Underground Salt Caverns

Zhang

Chen

2022

Energies

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“…This system could provide heat energy at 500 K and cold energy at 250 K. They compared this novel trigeneration system with the CAES system and preliminarily verified the feasibility of distributed energy supply with CO 2 as the working fluid. Li et al 32 established a more accurate underground gas storage model for the CCES system and simulated by a numerical method. They focused on the hydrodynamic and thermodynamic characteristics of the underground component when CO 2 was utilized as the working medium.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of a novel compressed carbon dioxide energy storage system with low‐temperature thermal storage

et al. 2020

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Summary Research projects on new electrical energy storage (EES) systems are underway because of the role of EES in balancing the electric grid and smoothing out the instability of renewable energy. In this paper, a novel compressed carbon dioxide energy storage with low‐temperature thermal storage was proposed. Liquid CO2 storage was employed to increase the storage density of the system and avoid its dependence on geological formations. Low‐temperature thermal energy storage technology was utilized to recycle the heat of compression and reduce the challenges to system components. The system configuration was introduced in detail. Four evaluation criteria, the round trip efficiency (RTE), exergy efficiency (ηEx), thermal efficiency (ηTE), and energy density (ρE) were defined to show the system performance. Parametric analysis was carried out to examine the effects of some key parameters on system performance and the genetic algorithm was adopted for system optimization. The calculated results show that, for the novel EES under the basic working condition, its RTE is 41.4%, ηTE is 59.7%, ηEx is 45.4%, and ρE is 15 kWh m−3. The value of ρE increases with the increasing pump outlet pressure for a fixed value of pressure ratio, and the changes of RTE, ηTE, and the total exergy destruction of the system (ED,total) with pump outlet pressure are complicated for different values of pressure ratio. When both pressure ratio and pump outlet pressure are high, the values of RTE and ρE can be maximized whereas the value of ED,total can be minimized. Besides, no matter how pump outlet pressure and pressure ratio change, the exergy destruction of the system mainly come from compressors and regenerators, which accounts for about 50% of the total exergy destruction.

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