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Title: Heat Transfer and Fluid Transport of Supercritical CO2 in Enhanced Geothermal System with Local Thermal Non-equilibrium Model

Journal Article · · Energy Procedia (Online)
 [1];  [1];  [1];  [1];  [2]
  1. Tsinghua Univ., Beijing (China)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
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The heat transfer and fluid transport of supercritical CO2 in enhanced geothermal system (EGS) is studied numerically with local thermal non-equilibrium model, which accounts for the temperature difference between solid matrix and fluid components in porous media and uses two energy equations to describe heat transfer in the solid matrix and in the fluid, respectively. As compared with the previous results of our research group, the effect of local thermal non-equilibrium mainly depends on the volumetric heat transfer coefficient ah, which has a significant effect on the production temperature at reservoir outlet and thermal breakthrough time. The uniformity of volumetric heat transfer coefficient ah has little influence on the thermal breakthrough time, but the temperature difference become more obvious with time after thermal breakthrough with this simulation model. The thermal breakthrough time reduces and the effect of local thermal non-equilibrium becomes significant with decreasing ah.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; International Science and Technology Cooperation Program of China, Los Angeles, CA (United States); Ministry of Science and Technology of China, Beijing (China); Research Project of Chinese Ministry of Education, Beijing (China)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1207902
Journal Information:
Energy Procedia (Online), Vol. 63, Issue C; ISSN 1876-6102
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

References (5)

Enhanced geothermal systems (EGS) using CO2 as working fluid—A novel approach for generating renewable energy with simultaneous sequestration of carbon journal August 2006
On production behavior of enhanced geothermal systems with CO2 as working fluid journal June 2008
Numerical investigation of fluid flow and heat transfer in a doublet enhanced geothermal system with CO 2 as the working fluid (CO 2 –EGS) journal January 2014
Numerical simulation of Fluid-Rock coupling heat transfer in naturally fractured geothermal system journal July 2011
A novel three-dimensional transient model for subsurface heat exchange in enhanced geothermal systems journal February 2013

Cited By (3)

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO 2 as working fluid: A review on heat transfer and energy conversion in EGS using water/CO 2 journal July 2015
Geothermal power generation in China: Status and prospects journal May 2019
Potential of $$\hbox {CO}_{2}$$CO2 based geothermal energy extraction from hot sedimentary and dry rock reservoirs, and enabling carbon geo-sequestration journal January 2020

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Related Subjects

58 GEOSCIENCES
enhanced geothermal system
CO2
local thermal non-equlibrium