Overview of Turboexpander-Generators
Turboexpander-generators are designed to expand process fluid from inlet to discharge pressure in two steps, converting kinetic energy into mechanical energy to drive generators. These systems are used across various applications such as oil & gas processing, gas liquefaction, petrochemicals, geothermal power generation, waste-heat recovery, and ocean thermal energy recovery.

Capabilities and Achievements
GE has over 1,200 turboexpander units worldwide, with more than 150 coupled with generators. The designs focus on increased capacity, reduced costs, and maximized reliability. Continuous improvements in rotor and bearing design, efficiency optimization, and control systems contribute to their success.

Design and Testing Excellence
The GE Turboexpander Center of Excellence ensures innovation through collaboration with customer engineering teams. Advanced testing facilities equipped with real-time data acquisition systems provide comprehensive performance mapping. Testing adheres to ASME PTC10 standards.

Construction Modifications and Uprates
GE offers specialized solutions to maximize plant productivity, including customized modifications and technology injections to enhance productivity with minimal downtime. All work is performed by GE-trained specialists.

Technological Features
Key features include patented multi-link Inlet Guide Vanes (IGVs) for precise control, high-efficiency aerodynamics, and dynamic dry gas seals. The systems can handle pressures up to 3,000 psia and temperatures from -450ºF to 925ºF, with expansion ratios up to 14 per stage.

Drive and Speed Options
Turboexpanders are available with direct drive or external gearboxes, with a common oil supply system. The installed fleet ranges from 50 to 15,000 kW, with direct-drive options eliminating the need for speed reduction gearboxes.

Frame Size Distribution
The document provides a table of frame sizes, shaft power, and expander outlet flow capacities, ranging from 1,600 kW to 45,000 kW and 4,000 m3/h to 200,000 m3/h.

Contact Information
GE Oil & Gas has global headquarters in Florence, Italy, and regional headquarters in Houston, Texas. Contact details and further information are available on their website.