Steam Turbine Selection SOAPP-CT Technology Module

BACKGROUND

Steam turbines are used in combined cycle plants to convert the heat recovered by the heat recovery steam generator (HRSG) into mechanical work. The selection of a steam turbine is dependent upon several factors, including the steam conditions provided by the HRSG, unit rating, desired flexibility of the system, and compatibility with the balance of the plant. Manufacturers have made several improvements to steam turbine technology in a variety of configurations for use in combined cycle power plants. This module addresses condensing steam turbine technologies ranging in size from 10 MW to 650 MW.

SCOPE

The SOAPP-CT Technology Module on Steam Turbine Selection includes technical reference information plus interactive conceptual design models for the following steam turbine configurations:

single flow geared

modular high speed

single flow, direct drive

two casing, two flow, non-reheat

two casing, two flow, reheat

three casing, four flow, reheat

two casing, single flow, reheat

single casing, single flow, reheat

The module includes discussions on basic principles and the major components of steam turbines. More detailed information on steam turbine 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 steam turbine configurations as a function of the following sensitivities:

combustion turbine model selection

number of combustion turbines

cycle type

fuel selection

secondary fuel usage factor

steam pressures and temperatures

steam turbine controlled extraction (if any)

extraction pressure, temperature, and flow

steam turbine exhaust backpressure

combustion turbine NO_x control method

combustion turbine NO_x emission limit

ambient dry and wet bulb temperature

site elevation

unit cooling water temperature

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.

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	SOAPP-CT Technology Modules Steam Turbine Selection
	The SOAPP-CT Technology Module on Steam Turbine Selection is an interactive, multimedia reference and evaluation tool for application of steam turbines in combustion turbine combined cycle plants. You can quickly make informed decisions by varying key sensitivity parameters and comparing the change in performance data, equipment sizes, capital costs, O&M costs, and construction schedule for each alternative steam turbine configuration. BACKGROUND Steam turbines are used in combined cycle plants to convert the heat recovered by the heat recovery steam generator (HRSG) into mechanical work. The selection of a steam turbine is dependent upon several factors, including the steam conditions provided by the HRSG, unit rating, desired flexibility of the system, and compatibility with the balance of the plant. Manufacturers have made several improvements to steam turbine technology in a variety of configurations for use in combined cycle power plants. This module addresses condensing steam turbine technologies ranging in size from 10 MW to 650 MW.
			SCOPE The SOAPP-CT Technology Module on Steam Turbine Selection includes technical reference information plus interactive conceptual design models for the following steam turbine configurations: single flow geared modular high speed single flow, direct drive two casing, two flow, non-reheat two casing, two flow, reheat three casing, four flow, reheat two casing, single flow, reheat single casing, single flow, reheat The module includes discussions on basic principles and the major components of steam turbines. More detailed information on steam turbine 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 steam turbine configurations as a function of the following sensitivities: combustion turbine model selection number of combustion turbines cycle type fuel selection secondary fuel usage factor steam pressures and temperatures steam turbine controlled extraction (if any) extraction pressure, temperature, and flow steam turbine exhaust backpressure combustion turbine NO_x control method combustion turbine NO_x emission limit ambient dry and wet bulb temperature site elevation unit cooling water temperature 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.

	A database of contemporary, representative worldwide experience is also included in this module for different steam turbine configurations.



	Last modified: Friday, July 19, 2002

SOAPP-CT Technology Modules

Steam Turbine Selection

BACKGROUND

SCOPE