CCUS Parasitic Load on Power Plant

Engineering Basis

• Steam extraction: 0.20 MWh_e lost per GJ_thermal (LP steam at 4 bara → turbine bypass).
• CO₂ compression: 0.110 MWh/tCO₂ for 5-stage to 150 bara (DOE NETL).
• Aux: 0.040 MWh/tCO₂ (pumps + blower + cooling water).
• Plant CO₂ factors (kg/MWh_thermal): NGCC 198, coal 340.
• Typical η drops at 90% capture: NGCC 7-9 pp, USC coal 10-12 pp.
• Standards: DOE NETL Cost & Performance Baseline (2022), IEAGHG, IPCC SR-CCS.