IECM 12.0 beta User Manual > Modules Included with the IECM > Pulverized Coal (PC) Plant > SET PARAMETERS > CO2 Capture, Transport & Storage > 1. Ammonia System >

Capture

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Inputs for the ammonia system absorber, chiller system and regenerator in PC and NGCC plants are entered on the Capture parameter screen.

The following parameters are available:

•Absorber:

•Ammonia Concentration: This is the concentration of reagent in water as injected into the CO2 absorber.

•Overall Ammonia Slip: This is the ammonia slip above the water wash.

•Absorber NH3 Slip: This is the ammonia slip above the absorber.

•Circulating Water Flow Rate: This is the DCC circulating water flow rate.

•Gas Phase Pressure Drop: This is the pressure drop that the flue gas has to overcome as it passes through a very tall absorber column, countercurrent to the sorbent flow.

•ID Fan Efficiency: The cooled flue gas is pressurized using a flue gas blower before it enters the absorber. This is the efficiency of the fan/blower to convert electrical power input into mechanical work output.

•Chiller System:

•Capture System Cooling Duty: This is the total amount of cooling water normalized by CO2 product.

•Percent Cooling Supply by Chillers: This is the percent of cooling provided by the chillers, as opposed to external sources.

•Power Requirement by Chillers: This is the amount of power required by the chillers.

•Regenerator:

•Regeneration Heat Requirement: This is the total amount of heat energy required in the reboiler for sorbent regeneration.

•Regeneration Steam Heat Content: The regeneration heat is provided in the form of LP steam extracted from the steam turbine (in case of coal-fired power plants and combined-cycle gas plants), through the reboiler (a heat exchanger). In case of simple cycle natural gas fired power plants, a heat recovery unit maybe required. This is the enthalpy or heat content of the steam used for solvent regeneration.

•Heat-to-Electricity Efficiency: (Only shown when an auxiliary boiler is not used.) This is the efficiency of converting low pressure steam to electricity. The value reflects the loss of electricity to the base plant when the LP steam is used for regenerator heat.

•Pump Efficiency: This is the efficiency of the solvent circulation pumps.

•Percent Solids in Reclaimer Waste: This is the amount of solids typically present in the reclaimer waste.