Lm2500 Intro

Scope of Manual

This Installation Design Manual (IDM) has been prepared by Industrial Aeroderivatives Department (IAD) of GE Power Systems to assist Purchaser’s (gas turbine packagers/installation designers) in technical integration of the LM2500 Single Annular Combustor (SAC) gas turbine into a complete gas turbine system.

For maximum assurance of successful adaptation of the LM2500 SAC gas turbine in each given user service, it is recommended that the package/system designs, as related to gas turbine interfaces, and in areas affecting installation and operation, be reviewed with GE as early in the design phase as possible. Particular emphasis should be placed upon review of unusual or unique conditions, requirements, or circumstances that must be considered for a particular application or installation.

Model Descriptions

The LM2500 Industrial Gas Turbine at the present time is offered in three model groups:

LM2500-PE - An improved model, having a continuous base rating of 31,200 shaft horsepower, 3600 rpm power turbine speed, and at ISO standard rating conditions. Improvements in the high pressure turbine components have been incorporated in the model LM2500-PE by introduction of the proven, advanced turbine cooling technology of the CF6-50 aircraft engine. This enhanced air cooling circuitry, which is made possible by the use of special cored turbine blade castings, permits the turbine blades to operate at both lower metal temperatures and stress levels over its predecessor.

LM2500-PE (Steam) - Steam injection is employed in the standard production model LM2500-PE gas turbine as a method of power enhancement, thermal efficiency improvement, and suppression of the oxides of nitrogen (NOx). Steam generated by the waste heat present in the exhaust of the engine, or by a separately fired boiler, is injected into the combustor by means of dual passage fuel nozzles for NOx suppression, and into the exit plane of the compressor through the compressor discharge bleed ports for power enhancement. Water may be used in this model configuration, as an alternative, for NOx suppression. This model provides a nominal continuous base rating of 34,850 shaft horsepower at 3600 rpm power turbine speed at ISO standard rating conditions, with a maximum total steam/water flow of 30,000 pounds per hour.

LM2500-PH (STIG) - The LM2500-PH STIG (Steam Injected Gas Turbine) is identical in concept and in external configuration to the standard steam-injected LM2500-PE gas turbine, but includes internal hardware modifications to provide a + 2.2 percent high pressure turbine flow function, and a - 5.0 percent decreased low pressure turbine flow function to permit the injection of increased rates of steam, resulting in further power enhancement and thermal efficiency improvement. The LM2500-PH STIG model offers a nominal continuous base rating of 38,400 shaft horsepower at 3600 rpm power turbine speed, at standard ISO rating conditions, with a maximum total steam/water flow of 50,000 pounds per hour.

All LM2500 industrial models are offered with the option of three alternative fuel systems for operation either on natural gas fuel, liquid petroleum distillate fuel, or dual-fueled, using natural gas and/or liquid

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fuel. Each of the three alternate fuel systems is also available in a configuration suitable for suppression of the oxides of nitrogen, utilizing either water or steam. A further option is also offered to provide for power enhancement using steam injection. These configuration options permit the Purchaser to select the fuels system which affords the most economical approach for a particular application.

The text of this Installation Design Manual has been prepared to describe the functional characteristics and installation/interface requirements and criteria for the Model LM2500-PE and LM2500-PH gas turbines with standard equipment, utilizing natural gas fuel, liquid fuel, or dual fuel, and with steam injection for power enhancement and NOx suppression where appropriate.

LM2500 Industrial Model Number Designation

The model number designation system for GE Marine and Industrial Products was changed effective April 1983. All LM2500 gas turbines manufactured after that time were identified by a number system composed of a prefix, engine family identification, type code, and suffix letter designation indicating major product configuration variations. (Model number designations originally assigned to gas turbines manufactured prior to the time of the change were not retroactively affected.)

As an example: 7LM2500-PE-MGX

7LM = Prefix 2500 = Engine family designation -PE = Type code -MGX = Configuration code

• Prefix - The prefix "7LM" is a GE Company designation for a mechanical, aeroderivative (non-aircraft) gas turbine/gas generator produced by GE Aircraft Engines.

• Engine Family Designation - The basic engine number related to the nominal shaft horsepower at ISO conditions with the last zero deleted.

• Type Code - The type code is composed of two letters, with the first letter assigned as follows:

P = Gas Turbine

G = Gas Generator

The second letter represents a major design difference or improvement and/or ISO rating modification of the same product, and follows in alphabetical sequence with "A" representing the first version.

• Configuration Code - The configuration code, composed of either two or three letters identifies major physical characteristics of the product in terms of utilization. Codes are assigned as follows:

• HPT Blade Coating

M = Marinized N = Non-marinized

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• Fuel System

-G = Gas -L = Liquid -D = Dual

• NOx Suppression

S = NOx suppression with steam W = NOx suppression with water A = NOx suppression and power enhancement with steam B = NOx suppression with water and power enhancement with steam C = Power enhancement (only) with steam X = Early, prior designation for models equipped for NOx suppression using either water or steam.

Accessories offered with the gas turbine but which are not attached to the engine are not included in the basic product model numbers. These items will be identified separately by kit identification numbers listed on model lists referenced to the application drawing number.

The Table below provides a listing by model designation number, fuel type, mode of NOx, and mode of power enhancement of all of the LM2500 gas turbine models offered and covered by this Installation Design Manual.

Recent changes to high pressure turbine blade coatings have resulted in common balding for both the marinized and non-marinized industrial engine configurations. The new Platinum Aluminide coating has been found to offer comparable oxidation and corrosion resistance to previous marinized coatings in an industrial environment, and are capable of being recoated for extended operation in the field. In addition, Codep-coated blades are available if desired for applications where the fuel and environment do not require a corrosion resistant coating.

Model Fuel NOx

Abatement Power

Enhancement

LM2500-PE Gas Turbine

7LM2500-PE-MG Gas None None

7LM2500-PE-MGS Gas Steam None

7LM2500-PE-MGW Gas Water None

7LM2500-PE-ML Liquid None None

7LM2500-PE-MLS Liquid Steam None

7LM2500-PE-MLW Liquid Water None

7LM2500-PE-MD Dual None None

7LM2500-PE-MDS Dual Steam None

7LM2500-PE-MDW Dual Water None

LM2500-PE Steam Gas Turbine

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7LM2500-PE-MGA Gas Steam Steam

7LM2500-PE-MGB Gas Water Steam

7LM2500-PE-MGC Gas None Steam

7LM2500-PE-MDA Dual Steam Steam

7LM2500-PE-MDB Dual Water Steam

7LM2500-PE-MDC Dual None Steam

LM2500-PH STIG Gas Turbine

7LM2500-PH-MGA Gas Steam Steam

7LM2500-PH-MGB Gas Water Steam

7LM2500-PH-MLA Liquid Steam Steam

7LM2500-PH-MLB Liquid Water Steam

7LM2500-PH-MDB Dual Water Steam

Purchaser's Responsibilities Interface Requirements Checklist

General Installation Design Considerations Operational Readiness Review

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Lm2500 Intro

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