Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5476882 | Energy | 2017 | 10 Pages |
Abstract
A novel carbon capture and storage system integrated with geothermal energy was proposed to reduce energy consumption in the post-combustion CO2 capture (PCC) process. Geothermal energy at medium temperature was used to provide the heat required for solvent regeneration. A technical and economic assessment was conducted based on a 300 MWe coal-fired power plant. Additionally, the integrated system was also compared with a stand-alone geothermal power (GP) plant to evaluate individual advantages. Both an enhanced geothermal system (EGS) and a hot sedimentary aquifer (HSA) reservoir were selected to identify the effect of geological properties and heat characteristics on system performance. The results indicated that the geothermal-assisted post-combustion CO2 capture (GPCC) plant exhibited better performance than the PCC plant. The net plant average efficiency increased 5.56% and 4.42% in the EGS scenario and HSA scenario, respectively. Furthermore, the net incremental geothermal efficiency obtained corresponded to 21.34% and 20.35% in the EGS scenario and HSA scenario, respectively. The economic assessment indicated that the GPCC systems in both the EGS scenario and HSA scenario had lower marginal cost of electricity (70.84Â $/MWh and 101.06Â $/MWh) when compared with that of the stand-alone GP systems (151.09Â $/MWh and 101.95Â $/MWh).
Related Topics
Physical Sciences and Engineering
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Energy (General)
Authors
Fu Wang, Shuai Deng, Jun Zhao, Junyao Wang, Taiwei Sun, Jinyue Yan,