IECM 12.0 beta User Manual > Modules Included with the IECM > Natural Gas Combined Cycle (NGCC) Plant > SET PARAMETERS > Overall Plant >

Regulations & Taxes

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The Regulations & Taxes parameter screen defines the emission constraints as they apply to the gases emitted from the power plant. Constraints for sulfur dioxide, nitrogen dioxides, particulates, and mercury are not needed due to the cleaner emissions from NGCC plants.

The emission constraints determine the removal efficiencies of control systems that capture CO2. The level of capture is set to comply with the specified emission constraints. As discussed later, however, user-specified values for control technology performance may cause the plant to over-comply or under-comply with the emission constraints specified in this screen. The following emission constraint is provided:

•Total CO2 Removal Constraint: The emission constraint applies to all the air emission sources in the power plant, primary or secondary. The default value is based on recent discussions and is not based on any currently enforced law.

This screen also allows the user to enter the taxes on emissions in dollars per ton. The final costs determined from these inputs are available in the Stack results section of the IECM. The costs are added to the overall plant cost, not a particular technology. The following taxes on emissions may be specified:

•Sulfur Dioxide (SO2): The cost to the plant of emitting sulfur dioxide in dollars per ton.

•Nitrogen Oxide (equivalent NO2): The cost to the plant of emitting nitrogen oxide in dollars per ton.

•Carbon Dioxide (CO2): The cost to the plant of emitting carbon dioxide in dollars per ton.