LEC III™

PPM Emission Combustion Systems for B&E-Class Gas Turbines

Field Proven 3-5 PPM NOx
The patented LEC III™ gas turbine combustion technology, developed, and manufactured by PSM guarantees sub-5 parts-per-million (ppm) NOx emission levels when operated on natural gas over the entire premix operating range, from baseload down to 80% relative load (respectively 50%-60% with Inlet Bleed Heat system). CO emissions under these conditions are typically measured in the low single digits to meet customer requirements.

Drop-In, Conversion, or Individual Parts Replacement
The LEC III™ system was developed for implementation in B & E-class turbines, including GE Frames 6B, 7B/EA, 9E, and Siemens/Westinghouse 501B6/D5, either as drop-in replacements for existing OEM DLN1 systems, or as complete conversions from standard diffusion combustion systems. No changes to the control systems are needed for vintages Mark V and higher. Operators of DLN1 combustors also have the option to individually replace their OEM system components with PSM’s LEC III™ parts.

Fuel Air Mixing is the Key
Thorough and efficient premixing of the fuel and air prior to the combustion process is the key to both low NOx and CO emissions in the PSM LEC III™ combustion system. Three key design features in the LEC III™ combustion system enable this improved process and fundamentally differentiate PSM’s
LEC III™ from the OEM design: the forward flowing venturi, effusion cooling technology, and an advanced secondary fuel nozzle (SFN).