IECM 12.0 beta User Manual > Modules Included with the IECM > Pulverized Coal (PC) Plant > SET PARAMETERS > NOx Control > 1. In-Furnace Controls >

O&M Cost

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O&M costs are typically expressed on an average annual basis and are provided in either constant or current dollars for a specified year, as specified on the Financing & Cost Year screen and shown in the Status Bar. The following parameters are available on the O&M Cost parameter screen:

•Variable O&M Costs:

•Urea Cost: (only shown for SNCR or LNB & SNCR) This is the unit cost of urea used for any of the SNCR options. It is shown for reference and may be set on the Overall Plant O&M Cost screen.

•Ammonia Cost: (only shown for SNCR or LNB & SNCR) This is the unit cost of ammonia used for any of the SNCR options. It is shown for reference and may be set on the Overall Plant O&M Cost screen.

•Auxiliary Gas Cost: (only shown for Gas Reburn) This is the unit cost of natural gas used for the Gas Reburn option. It is shown for reference and may be set on the Auxiliary Fuel screen or the Fuel Cost screen.

•Electricity Price (Internal): This is the price of electricity. It is shown for reference and may be set on the Fuel, Power & Land Cost screen.

•Fixed O&M Cost: Fixed O&M costs are given as a total cost, rather than itemized costs broken down by individual maintenance and labor costs. The results are given as a percent of the total capital cost.

•Combustion Modifications: (only shown for LNB, LNB & OFA, Gas Reburn, LNB & SNCR) This is the total fixed operating and maintenance cost for boiler NOx modifications made in the combustion zone (LNB, OFA, natural gas reburn).

•SNCR Boiler Modifications: (only shown for SNCR, LNB & SNCR) This is the total fixed O&M cost for the SNCR equipment alone.