Multiscale modeling of heat and mass transfer in fractured media for enhanced geothermal systems applications

Vasilyeva, Maria; Babaei, Masoud; Chung, Eric T.; Spiridonov, Denis

doi:10.1016/j.apm.2018.10.025

Cited by 55 publications

(17 citation statements)

References 47 publications

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“…Vasilyeva et al [48] presented the multiscale model reduction techniques based on the generalized multiscale finite element method (GMsFEM) for geothermal fractured reservoir simulation. The general idea of GMsFEM is to first solve some local problems to get snapshot spaces, then design suitable spectral problems to obtain important modes which can be used to construct multiscale basis [9,10,17].…”

Section: Multiscale Methodsmentioning

confidence: 99%

“…The multiscale basis functions for transport problem account for the fine-grid flow characteristics in both matrix and fractures media that lead to more accurate coarse-grid approximation. Compared to Nissen et al [35], Praditia et al [39], and Vasilyeva et al [48] where local elliptic problems are solved to construct transport multiscale basis functions, NLMC provides coarse-grid approximation whose degrees of freedoms have physical meanings. As a result, we have an accurate general multiscale framework for both flow and transport problems in fractured porous media, where we model fractures embedded into the coarse mesh cell.…”

Section: This Workmentioning

confidence: 99%

“…Heat transfer terms (i) r mf and r fm [48] ρ in both matrix and fracture media is related to the changes in temperature and pressure…”

Section: Problem Formulationmentioning

confidence: 99%

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Upscaling of the single-phase flow and heat transport in fractured geothermal reservoirs using nonlocal multicontinuum method

et al. 2019

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In this work, we consider a single-phase flow and heat transfer problem in fractured geothermal reservoirs. Mixed dimensional problems are considered, where the temperature and pressure equations are solved for porous matrix and fracture networks with transfer term between them. For the fine-grid approximation, a finite volume method with embedded fracture model is employed. To reduce size of the fine-grid system, an upscaled coarse-grid model is constructed using the nonlocal multicontinuum (NLMC) method. We present numerical results for two-dimensional problems with complex fracture distributions and investigate an accuracy of the proposed method. The simulations using upscaled model provide very accurate solutions with significant reduction in the dimension of problem.Publisher's note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Multiscale Methodsmentioning

confidence: 99%

Section: This Workmentioning

confidence: 99%

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Upscaling of the single-phase flow and heat transport in fractured geothermal reservoirs using nonlocal multicontinuum method

et al. 2019

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“…In order to achieve optimum efficiency from a geothermal system, the main goal should be to optimize heat recovery from the reservoir to service both the electrical grid needs and to provide useful heat for habitat and industrial needs. Most geothermal power plants are designed to provide electrical energy/heat to the surrounding area, which often is a local detached grid [69][70][71][72]. If geothermal electrical power can be used in a large grid to provide special services such as peak shaving or load displacement, the value of the energy provision increases.…”

Section: Heat-and Flow-transport Challenges 41 System Thermal Issuesmentioning

confidence: 99%

Well-Doublets: A First-Order Assessment of Geothermal SedHeat Systems

Mahbaz

Yaghoubi

Sarvaramini³

et al. 2021

Applied Sciences

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Renewable and sustainable energy sources can play an important role in meeting the world’s energy needs and also in addressing environmental challenges such as global warming and climate change. Geothermal well-doublet systems can produce both electrical and thermal energy through extracting heat from hot-water aquifers. In this paper, we examine some potential challenges associated with the operation of well-doublet systems, including heat conductivity, chemical, and mechanical issues. In these systems, geomechanics issues such as thermal short-circuiting and induced seismicity arise from temperature and pressure change impacts on the stress state in stiff rocks and fluid flow in fractured rock masses. Coupled chemical processes also can cause fluid channeling or formation and tubular goods plugging (scaling) with precipitates. Mechanical and chemical disequilibrium conditions lead to increased production uncertainties; hence risk, and therefore coupled geo-risk assessments and optimization analyses are needed for comparative commercialization evaluations among different sites. The challenges related to heat transfer processes are also examined. These studies can help better understand the issues that may arise during the operation of geothermal well-doublet systems and improve their effectiveness, subsequently reducing associated costs and risks.

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“…Air density: density-1.184 kg/m3, thermal conductivity-0.026 W/m-K, specific heat-1003.6 j/kg-K [8][9][10][11][12][13]. Parameters of liquid in a dimensional capacity: density-1100 kg/m3, thermal conductivity-0.569 W/m-K, specific heat-4217 j/kg-K [8][9][10][11][12][13]. Material parameters of the steel hull measuring cups and duct exhaust system: density 7832 kg/m3, thermal conductivity -63.9 W/m-K, specific heat -434.0 j/kg-K [8][9][10][11][12][13], thickness of the hull measuring cups -4 mm, thickness of pipe exhaust system -3 mm.…”

Section: Numerical Simulationsmentioning

confidence: 99%

Heating system for measuring tanks of the cementing unit from the exhaust system of the base chassis

et al. 2020

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The purpose of this article is to increase the efficiency of the design process and reduce the cost of field experiments by using numerical analysis methods of the dimensional capacity heating efficiency of the internal combustion engine exhaust system. To solve the problem, a non-stationary nonlinear solver of gas dynamic processes (Siemens STAR-CCM+) was used, which allows to evaluate the correctness of the problem statement, significantly reducing the cost of full-scale tests. The paper considers the heating of a dimensional two-section tank in the layout of the cementing unit on the chassis with a triplex high-pressure pump and a drive from the power take-off box on the gear box of the chassis engine. The exhaust pipe structurally passes inside the measuring tank. According to the research results obtained graphic dependences of temperature change of liquid measuring cups to control points, the distribution of temperature field of the liquid in a volumetric tank, distribution of the temperature field of the surrounding air, stream lines and velocity field of the ambient air and the exhaust gases of internal combustion engines. The results of the calculations clearly show that the application of the method of heating the measuring capacity by entering the exhaust pipe directly into the liquid can be considered effective.

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Multiscale modeling of heat and mass transfer in fractured media for enhanced geothermal systems applications

Abstract: Multiscale modelling of heat and mass transfer in fractured media for enhanced geothermal systems applications. Applied Mathematical Modelling.

Cited by 55 publications

References 47 publications

Upscaling of the single-phase flow and heat transport in fractured geothermal reservoirs using nonlocal multicontinuum method

Upscaling of the single-phase flow and heat transport in fractured geothermal reservoirs using nonlocal multicontinuum method

Well-Doublets: A First-Order Assessment of Geothermal SedHeat Systems

Heating system for measuring tanks of the cementing unit from the exhaust system of the base chassis

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