lm2500_fuelsystem

Various fuel, water, and steam systems can be selected for the LM2500 engine to fit a particular installation. The selection will depend on fuel availability and NOx suppression requirements, with either water or steam injection. Table 1 provides a summary matrix of LM2500 engine configurations which are offered for specific Purchaser requirements. The engine model designations are also provided.

This Section specifies operational/interface limits and requirements for the fuel, water, and steam systems, which are included as standard equipment for a particular gas turbine model. The gas turbine hardware includes fuel nozzles and fuel/water/steam manifold systems mounted externally on the gas turbine.

The fuel, water, and/or steam flow rates are determined from performance data which is described in Performance. The supply pressure requirements at the engine interface connection points can be determined with fuel flow, water or steam flow, and engine pressure level (PS3) from the performance data, and flow-pressure characteristics described in this section. Generally the estimated fuel flow rates should be increased at least 5% and the water/steam flow rates increased by 20% when calculating pressure requirements and system sizing to account for engine variations and deterioration.

Specific Installation data for each fuel system are provided by selecting the desired fuel system in Table 1. Additional general requirements are provided in Table 2.

Table 1. LM2500 Fuel Systems

Fuel System

No. Fuel System Manifolds Fuel Nozzle Type NOx Suppression

Power Enhance

m

1 Gas Gas Gas only No N

2 Gas/Water Gas and water Gas/Water Yes N

3 Gas/Steam Pre–Mix

Gas Steam

Pre–mix nozzle Yes N

4 Gas/Steam Direct Injection

Gas NOx steam CDP steam (purge)

Dual gas nozzle (gas and steam)

Yes N

5 Gas/Water/ Steam Gas/Water CDP (steam)

Gas/water nozzle Yes Y

6 Gas/Steam(STIG)

Gas NOx steam CDP steam

Dual gas nozzle (gas and steam)

Yes Y

7 Gas/CDP Steam Gas CDP steam

Gas only No Y

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8 Liquid Single liquid fuel Liquid fuel only with integral flow divider valves

No N

9 Liquid/Water Primary, secondary and water mixing tee

Liquid/water with off–engine fuel pressurizing valve

Yes N

10 Liquid/ Water/ Steam(Mixed Mode)

Same as liquid/water, plus CDP steam

Liquid/water with off–engine pressurizing valve

Yes Y

11 Liquid/ CDP Steam Single liquid fuel CDP steam

Liquid fuel only with integral flow divider valves

No Y

12 Dual Fuel Same as liquid/water plus gas

Dual fuel with off–engine liquid fuel pressurizing valve

No N

13 Dual Fuel/ Water Same as liquid/water plus gas


Yes N

14 Dual Fuel/ Water/Steam

Same as liquid/water plus Gas CDP steam


Yes Y

15 Dual Fuel/ CDP Steam

Same as dual fuel CDP steam


No Y

16 Dual Fuel/ Steam Pre-Mix

Same as dual fuel plus steam

Dual fuel-Steam with off–engine liquid fuel pressurizing valve

Yes N

17 Dual Fuel/ Steam Pre-Mix plus CDP Steam

Same as dual fuel plus steam CDP Steam

Dual fuel-Steam with off–engine liquid fuel pressurizing valve

Yes Y

Table 2 - General Requirements

Gas Fuel Requirements Liquid Fuel Requirements

NOx Abatement Water Requirements NOx Abatement Steam Requirements

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