Performance and economic assessments of integrating geothermal energy into coal-fired power plant with CO2 capture
2017 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 119, 278-287 p.Article in journal (Refereed) Published
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 (70.84 $/MWh and 101.06 $/MWh) when compared with that of the stand-alone GP systems (151.09 $/MWh and 101.95 $/MWh).
Place, publisher, year, edition, pages
2017. Vol. 119, 278-287 p.
IdentifiersURN: urn:nbn:se:mdh:diva-34611DOI: 10.1016/j.energy.2016.12.029ISI: 000393727800025ScopusID: 2-s2.0-85008225243OAI: oai:DiVA.org:mdh-34611DiVA: diva2:1065142