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

Steam Cycle Performance

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Inputs for the performance of the steam cycle are entered on the Steam Cycle Performance parameter screen . This screen is available for both the NGCC and IGCC plant types. The following parameters are available:

•Heat Recovery Steam Generator:

•HRSG Outlet Temperature: This is the desired output temperature from the heat recovery steam generator (HRSG).

•Steam Cycle Heat Rate, HHV: This is the steam cycle heat rate for the heat recovery steam generator. In IGCC plants, this is the nominal steam cycle heat rate; the actual heat rate depends on steam generated in the gasifier cooler.

•Cooling Water Temperature Rise: (Not shown when an Air Cooled Condenser is used.) This measures the increase in cooling water temperature after the once-through cooling water removes thermal energy from the exhaust steam.

•Auxiliary Heat Exchanger Load (% Primary Steam Cycle): The load on the auxiliary con denser or cooler is expressed as a percent of the load on the primary condenser. This parameter determines the amount of recirculating cooling water used to extract heat from the auxiliary condenser or cooler.

•Steam Turbine:

•Total Steam Turbine Output: This is the net electricity produced by the steam turbine associated with the HRSG (steam cycle). This value cannot be edited. It is provided for reference only.

•Power Block Totals:

•Power Requirement: This is the electricity for internal use. It is expressed as a percent of the gross plant capacity.