Turboexpander-Generator Solutions

LAT’s Aftermarket Team Serviced and Repaired This Non-LAT Expander-Generator Unit

Turboexpander-generators are widely used for power generation, heat recovery, pressure letdown and propane dehydrogenation (PDH). The energy extracted from a gas or other liquid expanding across the turbine can be converted into electric power by connecting the load side of the expander shaft to a generator. Configurations vary based on speed, power and the application and typically include three arrangements: expander-gearbox-generator, expander-generator and expander-high speed generator.

Aftermarket Service & Repair

Prior to becoming an OEM of turboexpander equipment, L.A. Turbine served as the non-OEM alternative for service and repairs on all makes and models of turboexpanders. Read the featured case studies and learn how LAT’s FX-TURBO team solved customer issues related to shaft vibration, seal breakdowns and leakage, and addressed operational problems with turboexpander-generators used for geothermal power generation. Contact us for more information on our expander-generator capabilities.

Configurations

EXPANDER-GEARBOX-GENERATOR

In most cases, the operating speed of the expander will be at a higher RPM than the operating speed of the generator. It is therefore necessary to utilize a speed reduction gearbox to facilitate appropriate coupling speed.

In one such configuration, the high speed expander shaft is connected to a high speed coupling that transmits the torque to a speed reduction gearbox. The gearbox is then coupled to the generator. This configuration is typically used in medium to high power applications.

EXPANDER-GENERATOR

In most cases, the operating speed of the expander will be at a higher RPM than the operating speed of the generator. It is therefore necessary to utilize a speed reduction gearbox to facilitate appropriate coupling speed.

In another such configuration, the expander wheel is directly mounted on a shaft that also serves as the high-speed gearbox pinion eliminating the high-speed coupling. As with the Expander-Coupling-Gearbox-Generator, this configuration is also used in medium to high power applications.

EXPANDER-HIGH SPEED GENERATOR

In a third configuration, the expander wheel is directly mounted on a shaft that also serves as the high-speed generator’s shaft, eliminating the gearbox entirely. This configuration is limited to the power capacity of high-speed generators and is typically used in low to medium power applications.