What is an expansion turbine?

An expansion turbine is a device that converts the energy of high-pressure gas into mechanical work by expanding the gas through a turbine.

How does an expansion turbine work?

It works by allowing pressurized gas to expand through a turbine, causing the turbine to spin and generate power, while cooling the gas in the process.

What is the efficiency of a expansion turbine?

Efficiency typically ranges from 70% to 90%, depending on design, operating conditions, and application.

What are the different types of expansion turbines?

Common types include: Radial or axial expanders Oil-bearing or magnetic-bearing expanders Generator-loaded or compressor-loaded expanders

What is the difference between turbine and turbo expander?

A turbine generally extracts energy from steam or combustion gases, while a turbo expander is specifically designed to recover energy from expanding gases, often in cryogenic or high-pressure applications.

What are the benefits of using Siemens Energy’s expansion turbines compared to traditional solutions?

We offer: High efficiency and reliability Advanced digital monitoring Custom engineering for diverse applications Reduced operational costs and emissions

How do Siemens Energy expansion turbines contribute to carbon capture and decarbonization?

They enable energy recovery and cooling in gas separation processes, supporting carbon capture, natural gas processing, and low-emission operations.

What industries benefit most from the integration of expansion turbines?

Industries include: Oil & Gas Petrochemicals Industrial gases Power generation Carbon capture and storage (CCS)

How does Siemens Energy ensure the reliability and efficiency of their expansion turbines?

Through: Precision engineering Robust materials Real-time performance monitoring Global service and support network

Expansion Turbines

Integrally geared radial expanders are applied where energy can be recovered from medium to high temperature off-gas or process gas streams from chemical and other industrial processes. The design is based on Siemens Energy’s integrally geared centrifugal compressor concept invented more than 70 years ago.

Energy in the hot gas stream is converted directly to mechanical energy which can then be used to drive a compressor or generator respectively. While improving the overall energy balance of the plant, this also saves operating expenses as well as capital cost because there is no need for additional heat exchangers and steam generation equipment otherwise required for heat transfer.

Radial expanders can be configured as stand-alone units with up to three expansion stages arranged around a central bull gear, or they can be integrated into the casing of an integrally geared compressor transferring power directly to the compressor bull gear by a pinion shaft.

Integrally geared radial expanders are applied where energy can be recovered from medium to high temperature off-gas or process gas streams from chemical and other industrial processes. The design is based on our integrally geared centrifugal compressor concept invented more than 70 years ago.