Siemens Unveils 38 MW Aeroderivative Gas Turbine

Using the combined expertise from its acquisitions of Dresser-Rand and Rolls-Royce Energy business, Siemens announced it has launched the latest evolution of its gas turbine portfolio – the SGT-A35 RB. The unit addresses needs in the offshore oil and gas industry by increasing the power density of the topside power generating equipment, Siemens said, thus reducing the required space claim. The lightweight, aeroderivative gas turbine can generate up to 38 MW and is integrated into a compact, lightweight Dresser-Rand package, which is up to 30% smaller and lighter than Industrial RB211 predecessors.

This combination produces a solution for the requirements of offshore applications, like floating production, storage and offloading (FPSO) vessels, Siemens said. FPSO vessels have become increasingly popular as oil and gas production moves towards deep-sea regions and harsher offshore environments to capture stranded reserves. With higher output and power density than comparable products, the SGT-A35 RB turbine offers several solutions for this and other offshore applications, according to the company.

The SGT-A35 RB gas turbine, previously known as the Industrial RB211-GT30, is based on the Industrial RB211 and Industrial Trent 60 gas turbines, built with Rolls-Royce Aero Engine technology. The company has more than 800 installations worldwide exceeding 37 million operating hours. The

The rendering shows the lightweight architecture of the SGT-A35 RB gas turbine for offshore applications like floating production, storage and offloading (FPSO) applications.

SGT-A35 RB variant introduces a lightweight free-power turbine derived from Rolls-Royce aerospace and marine Trent, as well as Siemens Industrial Trent 60. All rotating components have accumulated millions of hours in flight, as well as industrial and marine service.


The SGT-A35 RB gas turbine is available in 34 and 38 MW variants to match a range of application requirements. Both ratings are available for mechanical drive and 60 Hz or 50 Hz electrical generation. In this configuration, the gas turbine can directly drive a 2-pole A/C generator without the need for a gearbox. The thermal efficiency of the gas turbine exceeds 40% at ISO conditions. The gas turbine is ideal for hot climates and at 30 °C, it retains more than 90% of its ISO power output.

The Dresser-Rand package uses fit-for-purpose packaging features and configurable gas and oil application options, Siemens said. Its modular design inspires easier maintenance and can reduce downtime to maximize availability and reduce clients’ operating expenditures, the company said. The package has also been designed to more quickly exchange the complete gas turbine and power turbine. Over the years, the Dresser-Rand business has supplied more than 1000 aeroderivative gas turbine packages to the oil and gas industry.

“With the highest power density in this class we help offshore operators with a significant challenge,” said Judy Marks, head of New Equipment Solutions for the Dresser-Rand business. “With gas turbines used as prime movers in offshore installations, project developers can simultaneously reduce capital investment and increase production capacity to achieve desired returns.”

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