SOAPP-CT Technology Modules

HRSG Configuration

BACKGROUND

The selection of a heat recovery steam generator (HRSG) and the integration of performance data into the total plant cycle is a complex process. Unlike combustion turbine and steam turbine designs, which are standardized to a certain extent, the HRSG is generally a custom design. The design of an HRSG is optimized based on improved cycle efficiency and the capital and O&M costs of the system. This module provides a comprehensive look at HRSG configurations.

SCOPE

The SOAPP-CT Technology Module on HRSG Configurations includes technical reference information plus interactive conceptual design models for the following heat recovery steam generator configurations:

• single-pressure design with steam turbine
• with reheat cycle
• without reheat cycle
• single-pressure design without steam turbine
• two-pressure design with steam turbine
• with reheat cycle
• without reheat cycle
• two-pressure design without steam turbine
• three-pressure design with steam turbine
• with reheat cycle
• without reheat cycle
• three-pressure design without steam turbine

The module includes discussions on basic principles and the major components of heat recovery steam generators. More detailed information on HRSG technology, including unique processes, components, and supporting systems, is also included in this module.

Technology performance; equipment sizing; capital, O&M, and differential fuel costs; and construction schedules are modeled for each of the heat recovery steam generator configurations as a function of the following sensitivities:

• combustion turbine model selection
• number of combustion turbines
• cycle type
• fuel selection
• secondary fuel usage factor
• number of pressure levels
• steam pressures and temperatures at each pressure level
• pinch point temperature differences
• approach temperatures
• combustion turbine NO_x control method
• combustion turbine NO_x emission limit
• ambient dry bulb temperature
• site elevation
• unit capacity factor

Economic analyses are based on a static set of standard economic parameters when this module is used as a separate program. When this module is launched from within the SOAPP-CT WorkStation, up to 42 project-specific economic parameters are automatically imported into the module for the user's selected project. Included in these economic inputs are fuel cost, escalation rate, tax rate, capital structure, and contingencies. Default values for all module sensitivity parameters are also set from the values stored in user's selected project when this module is launched from within the SOAPP-CT WorkStation.

Last modified: Friday, July 19, 2002