Thermal recovery from a fractured medium in local thermal non‐equilibrium

Gelet, Rachel; Loret, Benjamin; Khalili, Nasser

doi:10.1002/nag.2145

Cited by 43 publications

(30 citation statements)

References 43 publications

(101 reference statements)

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“…Recently, a few researchers have focused on the subsurface heat exchange in EGS using the LTNE model [66][67][68][69][70][71]. Recently, a few researchers have focused on the subsurface heat exchange in EGS using the LTNE model [66][67][68][69][70][71].…”

Section: Fluid Energy Equationmentioning

confidence: 99%

“…Recently, a few researchers have focused on the subsurface heat exchange in EGS using the LTNE model [66][67][68][69][70][71]. Gelet et al considered hydraulic diffusion, thermal diffusion, forced convection, and deformation in a two-phase framework with a focus on the LTNE model and determined solid-to-fracture heat transfer coefficients by fitting the results of the LTNE model to data collected from the Fenton Hill HDR reservoirs, as shown in Figure 3(b) [70,71]. Zhang et al presented an LTNE model to simulate heat transfer and fluid flow of supercritical CO 2 under conditions at the European EGS site at Groβ Schönebeck, considering the heterogeneity of permeability of different layers and the fracture zone.…”

Section: Fluid Energy Equationmentioning

confidence: 99%

“…Ouyang et al compared different models to investigate the effects of thermal resistance of the rocks on EGS, such as the three-equation LTNE model that includes the transient thermal resistance of the rocks, the two-equation LTNE model that includes the constant thermal resistance of the rocks without the transient effect, and the LTE model that neglects the thermal resistance of the rocks [77]. Gelet et al [70,71] suggested including the solid thermal resistance in the LTNE model by correcting h using a simple dimension analysis. Gelet et al [70,71] suggested including the solid thermal resistance in the LTNE model by correcting h using a simple dimension analysis.…”

Section: Internal Heat Transfer Coefficients In the Fracture Or Networkmentioning

confidence: 99%

“…In addition, these authors improved their model for dual-porosity fractured porous media to simulate the THMC coupled process in an injection-withdrawal doublet EGS reservoir and analyzed the influence of mechanical, thermal, and chemical effects. Gelet et al considered different temperatures of the rock matrix and fluid and combined the LTNE model with the thermo-hydro-mechanical coupled model to study a three-phase poroelastic media with dual porosity for EGS [71]. Gelet et al considered different temperatures of the rock matrix and fluid and combined the LTNE model with the thermo-hydro-mechanical coupled model to study a three-phase poroelastic media with dual porosity for EGS [71].…”

Section: Field-scale Numerical Modeling Of Subsurface Heat Exchange Imentioning

confidence: 99%

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A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO₂as working fluid

Zhang

et al. 2015

Int. J. Energy Res.

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Summary Enhanced geothermal systems (EGS) technology is regarded as the future of geothermal energy and could become a major energy source in the future. However, EGS technology is not well developed. The challenges of EGS technology development, such as the small heat‐recovery factors and water limitations, need to be addressed. A comprehensive understanding of heat transfer in the complex subsurface structures is crucial for energy management in the reservoir, and an accurate heat transfer model of the reservoir is a key tool to optimize heat extraction to improve the heat‐recovery factor. The use of CO2 as the EGS working fluid is regarded as an emerging technology to address water limitations. The analytical solutions, lab‐scale experiments, field‐scale modeling methods of water/CO2 fluid flow and heat transfer in the reservoir, and a thermodynamic analysis of the energy conversion system at the surface are reviewed in this paper. Based on the existing literature, future research should focus on improving our knowledge and optimizing the heat transfer performance in the reservoir. Moreover, the emerging design of a heat exchange network in the reservoir and CO2‐EGS could result from technology development. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Fluid Energy Equationmentioning

confidence: 99%

Section: Fluid Energy Equationmentioning

confidence: 99%

Section: Internal Heat Transfer Coefficients In the Fracture Or Networkmentioning

confidence: 99%

Section: Field-scale Numerical Modeling Of Subsurface Heat Exchange Imentioning

confidence: 99%

See 2 more Smart Citations

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO₂as working fluid

Zhang

et al. 2015

Int. J. Energy Res.

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“…; Gelet et al . ). Cold fluid circulation induces perturbations, such as thermal drawdown in geothermal reservoirs.…”

Section: Introductionmentioning

confidence: 97%

Evaluation of recoverable energy potential from enhanced geothermal systems: a sensitivity analysis in a poro‐thermo‐elastic framework

2015

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This study presents application of an efficient approach to simulate fluid flow and heat transfer in naturally fractured geothermal reservoirs. Fluid flow is simulated by combining single continuum and discrete fracture approaches. The local thermal nonequilibrium approach is used to simulate heat transfer by conduction in the rock matrix and convection (including conduction) in the fluid. Fluid flow and heat transfer models are integrated within a coupled poro-thermo-elastic framework. The developed model is used to evaluate the long-term response of a geothermal reservoir with specific boundary conditions and injection/production schedule. A comparative study and a sensitivity analysis are carried out to evaluate the capability of the integrated approach and understand the degree by which different reservoir parameters affect thermal depletion of Soultz geothermal reservoir, respectively. Also observed, there exists an optimum fracture permeability after which the reservoir stimulation does not change the recovery factor significantly. Estimation of fluid temperature by the assumption of local thermal nonequilibrium heat transfer between the fracture fluid and the rock matrix gives fluid temperature of about 3°C less than that of estimated by thermal equilibrium heat transfer at early stage of hot water production.

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Analysis of volumetric internal erosion in cohesionless soils: Model, experiments and simulations

Gelet

Kodieh

Marot

et al. 2021

Num Anal Meth Geomechanics

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A hydro‐mechanical continuous model that accounts for volumetric internal erosion (otherwise called suffusion) is developed based on experimental observations and data to fill the gap between laboratory testing and field applications. The model is proposed based on the mixture theory applied to a two‐phase four‐species porous medium. The erodible soil is partitioned in two phases: one solid phase and one fluid phase. The solid phase is composed of non‐erodible grains and erodible particles. The fluid phase is composed of water and fluidized particles. The modelling of internal erosion is contributed directly by mass transfer from the solid phase towards the fluid phase. Two mass transfer relationships are considered, the power‐based relationship and the energy‐based relationship, and a calibration procedure for all material parameters is proposed. Both relationships assume that the power dissipated by the flow controls the kinetics of suffusion and that detachment prevails upon self‐filtration. Both relationships predict reasonably experimental data for several experimental tests on a gap‐graded cohesionless soil tested under various hydraulic loading paths. The model has been numerically solved with the finite element method and its predictions are next compared with the experimental results of a physical model of dike. The model along with the energy‐based relationship reproduces well the final amount of eroded mass. The spatial distributions of the total water head and the final percentage of fines are also smoothly reproduced.

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Thermal recovery from a fractured medium in local thermal non‐equilibrium

Cited by 43 publications

References 43 publications

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO₂as working fluid

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO₂as working fluid

Evaluation of recoverable energy potential from enhanced geothermal systems: a sensitivity analysis in a poro‐thermo‐elastic framework

Analysis of volumetric internal erosion in cohesionless soils: Model, experiments and simulations

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Thermal recovery from a fractured medium in local thermal non‐equilibrium

Cited by 43 publications

References 43 publications

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO2as working fluid

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO2as working fluid

Evaluation of recoverable energy potential from enhanced geothermal systems: a sensitivity analysis in a poro‐thermo‐elastic framework

Analysis of volumetric internal erosion in cohesionless soils: Model, experiments and simulations

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A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO₂as working fluid

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO₂as working fluid