A novel correlation approach to estimate thermal conductivity of pure carbon dioxide in the supercritical region

Jarrahian, Azad; Heidaryan, Ehsan

doi:10.1016/j.supflu.2012.02.008

Cited by 53 publications

(20 citation statements)

References 25 publications

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“…Span and Wagner proposed an equation of state that is proven to model CO 2 at a wide range of temperature and pressure (216.95 K < T < 1100 K, 0.52 MPa < p < 800 MPa) with high accuracy. The proposed series of equations by Span and Wagner, Heidaryan et al, and Jarrahian and Heidaryan are used to model the different properties of CO 2 . Readers are urged to visit the National Institute of Standards and Technology (NIST) chemistry webbook for detailed clarification on fluid properties variation…”

Section: Fluid Properties With Temperature and Pressurementioning

confidence: 99%

Multifracture response to supercritical CO ₂ ‐EGS and water‐EGS based on thermo‐hydro‐mechanical coupling method

et al. 2019

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Summary Hydraulic‐fracturing treatments have become an essential technology for the development of deep hot dry rocks (HDRs). The deep rock formation often contains natural fractures (NFs) at micro and macroscales. In the presence of the NF, the hydraulic‐fracturing process may form a complex fracture network caused by the interaction between hydraulic fractures and NF. In this study, analysis of carbon dioxide (CO2)‐based enhanced geothermal system (EGS) and water‐based EGS in complex fracture network was performed based on the thermo‐hydro‐mechanical (THM) coupling method, with various rock constitutive models. The complexity of the fracture geometry influences the fluid flow path and heat transfer efficiency of the thermal reservoir. Compared with CO2‐based EGS, water‐based EGS had an earlier thermal breakthrough with a rapid decline in production temperature. CO2 can easily gain heat rising its temperature thus reducing the effect of a premature thermal breakthrough. Both CO2‐based EGS and water‐based EGS are affected by in‐situ stress; the increase in stress ratio improved the fracture permeability but resulted in an early cold thermal breakthrough. When the same injection rate is applied to water‐based EGS and CO2‐based EGS, water‐based EGS displayed higher injection pressure buildup. Water‐based EGS had higher reservoir deformation area than CO2‐based EGS, and thermoelastic constitutive model for water‐based EGS showed larger deformed area ratio than thermo‐poroelastic rock model. Furthermore, higher values of rock modulus accelerated the reservoir deformation for water‐based EGS. This study established a novel discussion investigating the performance of CO2‐based EGS and water‐based EGS in a complex fractured reservoir. The findings from this study will help in deepening the understanding of the mechanisms involved when using CO2 or water as a working fluid in EGS.

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Section: Fluid Properties With Temperature and Pressurementioning

confidence: 99%

Multifracture response to supercritical CO ₂ ‐EGS and water‐EGS based on thermo‐hydro‐mechanical coupling method

et al. 2019

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“…(4) [18], [19], [21], which gives a measure of the foregone conclusion of the correlation. A value of zero indicates a random of the measured values around the correlation.…”

Section: Development Of Correlationmentioning

confidence: 99%

Development of Correlation for Thermophysical Properties of Supercritical Oxygen to Be Used in SMES

Sarkar¹,

Kumar²,

Usurumarti³

et al. 2015

JOCET

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Abstract-One of the most promising applications in High Temperature superconductor (HTS) is SuperconductingMagnetic Energy Storage (SMES). At present, electrical storage systems reports 50-60% losses due to traditional use of conventional conductors. In order to overcome such challenges, HTS with efficient cooling must be employed in power applications. In the present work, a novel cooling concept with supercritical oxygen (SCO) has been proposed to maintain the superconducting state for wide range of applications. Moreover, the thermophysical properties such as viscosity, density, thermal conductivity and specific heat have been studied over a wide range of temperatures (154.58K-204.58K) and critical pressure 50.43bar. Further, the development of correlations for SCO above the critical temperature (T c +50K), and at critical pressure (P c +1bar) have been analyzed. The developed correlations can be used in predicting the performance of SMES power devices by prior modeling and simulations at various operating conditions. Index Terms-Correlation, SMES, supercritical oxygen, and thermophysical properties.

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“…(19) and (20) were determined by the simplex method [33,34]. Table 3 lists the constants needed in the calculation of heat capacity.…”

Section: Tablementioning

confidence: 99%

On the isobaric specific heat capacity of natural gas

Jarrahian

Karami

Heidaryan

2014

Fluid Phase Equilibria

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A novel correlation approach to estimate thermal conductivity of pure carbon dioxide in the supercritical region

Cited by 53 publications

References 25 publications

Multifracture response to supercritical CO ₂ ‐EGS and water‐EGS based on thermo‐hydro‐mechanical coupling method

Multifracture response to supercritical CO ₂ ‐EGS and water‐EGS based on thermo‐hydro‐mechanical coupling method

Development of Correlation for Thermophysical Properties of Supercritical Oxygen to Be Used in SMES

On the isobaric specific heat capacity of natural gas

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A novel correlation approach to estimate thermal conductivity of pure carbon dioxide in the supercritical region

Cited by 53 publications

References 25 publications

Multifracture response to supercritical CO 2 ‐EGS and water‐EGS based on thermo‐hydro‐mechanical coupling method

Multifracture response to supercritical CO 2 ‐EGS and water‐EGS based on thermo‐hydro‐mechanical coupling method

Development of Correlation for Thermophysical Properties of Supercritical Oxygen to Be Used in SMES

On the isobaric specific heat capacity of natural gas

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Product

Resources

About

Multifracture response to supercritical CO ₂ ‐EGS and water‐EGS based on thermo‐hydro‐mechanical coupling method

Multifracture response to supercritical CO ₂ ‐EGS and water‐EGS based on thermo‐hydro‐mechanical coupling method