IECM 12.0 beta User Manual > Modules Included with the IECM > Common Input and Result Screens > Costs >

Cost of CO2 Avoided & Captured

Most CO2 capture systems have a summary result screen which is a two-table screen .

The table on the left contains a list of important performance and cost factors which vary depending on the technology.

The table on the right is fairly consistent and contains the following:

•Cost of CO2 Avoided & Captured: Many analysts like to express the cost of an environmental control system in terms of the cost per ton of pollutant removed or avoided. For energy-intensive CO2 controls there is a big difference between the cost per ton CO2 removed and the cost per ton "avoided" based on net plant capacity. Since the purpose of adding a CO2 unit is to reduce the CO2 emissions per net kWh delivered, the cost of CO2 avoidance is the economic indicator that is widely used in this field.

•Power Plant with CCS

•CO2 Emitted: This is the amount of CO2 vented to the air for every kilowatt hour of electricity produced in the power plant that is using CO2 Capture Technology.

•CO2 Captured: This is the amount of CO2 captured for every kilowatt hour of electricity produced in the power plant that is using CO2 capture technology.

•Cost of Electricity: The IECM framework calculates the Cost of Electricity (COE) for the overall Capture Plant by dividing the total annualized plant cost ($/yr) by the net electricity generated (kWh/yr).

•Cost of Electricity, excl. T&S: This is the value above minus the cost of CO2 transport and storage.

•Reference Plant

•CO2 Emitted: This is the amount of CO2 vented to the air for every kilowatt hour of electricity produced in the power plant with no CO2 Capture.

•Cost of Electricity: The IECM framework calculates the Cost of Electricity (COE) for the overall Reference Plant by dividing the Total Annualized Plant Cost ($/yr) by the Net Electricity Generated (kWh/yr) .

•Added Cost of CCS: This is the difference in the cost of electricity between the capture and reference plants:
Added Cost of CCS = ( Cost of Electricity cap. - Cost of Electricity ref. )

•Cost of CO2 Avoided: This is the economic indicator widely used in the field, calculated as the difference between the cost of electricity in the capture plant and the reference plant divided by the difference between the CO2 emissions in the reference plant and the capture plant:
Cost of CO2 Avoided = ( Cost of Electricity cap. - Cost of Electricity ref. ) / ( CO2 emissions ref. - CO2 emissions cap. )

•Cost of CO2 Captured: This is the cost of capturing CO2:
Cost of CO2 Captured = ( Cost of Electricity Excl. T&S cap. - Cost of Electricity ref. ) / ( CO2 emissions cap. )