The Impacts of Different CO2 Injection Temperature on Heat Extraction Rate in CO2-EGS Based on CCS Demonstration Project
In this paper we use Majiagou geologic formation in Erdos Carbon Caputure and Storage(CCS) demonstration project aera as artificial geothermal reservoir, and create numerical models of Enhanced Geothermal System(EGS) using CO2 as a heat transfer carrier. In order to analyze the impacts of CO2 injection temperatures on heat extraction rate and the sustainability of CO2-EGS, five cases with different CO2 injection temperature are designed. Simulation results show that the range of the average heat extraction rate of case 1～5 is 6.56～8.47MW in the whole CO2-EGS operation period. The heat extraction rates vary over time, And it is 6.37～7.9MW in CO2 and water displacement stage and 6.64～8.68MW after aqueous phase dispear respectively. Injection temperature of CO2 significantly impacts the heat extraction rate of EGS .
J. Na et al., "The Impacts of Different CO2 Injection Temperature on Heat Extraction Rate in CO2-EGS Based on CCS Demonstration Project", Advanced Materials Research, Vols. 588-589, pp. 21-26, 2012