Analysis of compressed air storage caverns in rock salt considering thermo-mechanical cyclic loading

Khaledi, Kavan; Mahmoudi, Elham; Datcheva, Maria; Schanz, Tom

doi:10.1007/s12665-016-5970-1

Cited by 55 publications

(22 citation statements)

References 40 publications

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“…The rate of creep deformation is also influenced by the temperature of rock mass that may affect the rate of cavern closure, subsequently (Bérest et al, 2007). Moreover, the influence of fast cooling and induced thermal contraction on the minimum principal stresses should be examined within a thermo-mechanical analysis (Khaledi, Mahmoudi, Datcheva & Schanz, 2016a;. However, as the main focus of this thesis is proposing a probabilistic approach to face with such complex application dealing with a significant amount of uncertainties, and in the sake of simplicity, the thermal interactions are neglected and the numerical simulation is done at constant ambient temperature T=298 K. GID software models the salt cavern with the above mentioned simplified geometry.…”

Section: Geometrymentioning

confidence: 99%

“…In this study, the minimum inner pressure of the cavity is assumed to be equal to 4 MPa. In our simulation, the temperature of intact rock salt is assumed to be equal to 50 • C. The thermal boundary condition of the wall of the cavity is decreased during the discharge phase to 30 • C (for more details about the variation of thermal condition see Khaledi, Mahmoudi, Datcheva & Schanz (2016a)). …”

Section: Karhunen-loéve Expansionmentioning

confidence: 99%

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Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

et al. 2016

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Section: Geometrymentioning

confidence: 99%

Section: Karhunen-loéve Expansionmentioning

confidence: 99%

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

et al. 2016

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“…In order to respond to the "Paris Agreement" and show China's determination to enforce environmental protection, the Chinese government is trying to change the energy consumption structure by increasing the weight of clean energy, like natural gas, in the primary energy [1,2]. In 2017, China's natural gas import reached 9.2×1010 m 3 , having a great increase of 27.6%.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Dilatancy of Rock Salt From an Unloading Path

Zhao¹

2019

GEOMATE

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As underground storages produce gas, rock salt would always be in unloading paths. The dilatancy behavior of the surrounding rock salt has a great significance for the stability and tightness of the storages. This study investigated dilatancy properties of the rock salt from unloading paths where the confining pressure decreased progressively while the axial pressure was kept fixed. The results showed that: the initial confining pressure value has a rare influence on the dilatancy of the rock salt; an increasing axial pressure can promote the dilatancy of the rock salt; a slower unloading rate and higher temperature would accelerate the dilatancy rate and augment the total volumetric expansion. Compared with the results from conventional loading paths, the compression-dilatancy point is independent of the loading types and remain unchanged in cyclic loading tests. An empirical model to predict compression-dilatancy point was proposed. This model has a certain degree of the engineering significance for designing the operating gas pressure and predicting the dilatancy deformation of the surrounding rock, including porosity variation and permeability.

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“…Using the different models of creep law that are discussed in the literature, numerical calculations were performed of the deformation-stress state around a CAES salt cavern, and thermal influence was taken into account [5,6].…”

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confidence: 99%

Influence of the Variability of Compressed Air Temperature on Selected Parameters of the Deformation-Stress State of the Rock Mass Around a CAES Salt Cavern

Polański

2021

Energies

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The article presents the results of a numerical simulation of the deformation-stress state in the rock mass around a salt cavern which is a part of a CAES installation (Compressed Air Energy Storage). The model is based on the parameters of the Huntorf power plant installation. The influence of temperature and salt-creep speed on the stability of the storage cavern was determined on the basis of the three different stress criteria and the effort of the rock mass in three points of the cavern at different time intervals. The analysis includes two creep speeds, which represent two different types of salt. The solutions showed that the influence of temperature on the deformation-stress state around the CAES cavern is of importance when considering the stress state at a distance of less than 60 m from the cavern axis (at cavern diameter 30–35 m). With an increase in cavern diameter, it is possible that the impact range will be proportionately larger, but each case requires individual modeling that includes the shape of the cavern and the cavern working cycle.

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Analysis of compressed air storage caverns in rock salt considering thermo-mechanical cyclic loading

Cited by 55 publications

References 40 publications

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

Experimental Study on the Dilatancy of Rock Salt From an Unloading Path

Influence of the Variability of Compressed Air Temperature on Selected Parameters of the Deformation-Stress State of the Rock Mass Around a CAES Salt Cavern

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