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GT24 and GT26 Gas Turbines - Features

Performance with a unique track record

> Pioneering the technology
Alstom is the only manufacturer in the world to have chosen the sequential combustion path, leading to high gas turbine efficiency, low emissions and wide part load operating range.

> Maintenance-free welded rotor
The solid welded rotor design eliminates scheduled maintenance work such as restacking and disk replacement during the service life of the rotor.

> Highly-efficient compressor
The GT24 and GT26 employ controlled diffusion airfoil (CDA) blading, where each compressor stage is individually optimised according to specific requirements and boundary layer conditions.

> Dry low NOx EV burner
EV (EnVironmental) burner technology gives long burner life, no maintenance between hot gas path inspections and low emissions. Addionally, EV burners can operate with a wide range of natural gases, including Liquified Natural Gas (LNG).

> Annular combustion
Two, fully annular combustion chambers distribute the circumferential temperature evenly while avoiding problem zones such as cross-firing tubes or transition pieces. Alstom's annular combustion systems do not require "Combustion Inspection", allowing a high avaibility.

> Turbine
The sequential combustion concept results in a gas turbine exhibiting extremely high power density resulting in the smaller blade dimensions of the GT24/GT26 machines.

> Secondary air system
The cooling air for the hot gas path components is taken from four extraction points along the compressor. Air from two of these secondary airflows is used directly, while the two other streams are cooled by heat exchangers (Once Through Coolers) before entering the hot gas path components.