Menu
Menu
Menu
- Technology
- /
- RADIAL OUTFLOW TURBINE
Exergy’s Radial Outflow Turbine
Conceptualized by Exergy the Radial Outflow Turbine (ROT) was launched in 2009, innovating the global ORC industry. It is a confirmation of Exergy’s status as a market game changer.
Exergy’s Radial Outflow Turbine technology is covered by multiple IP rights and the R&D department is always working to develop it further with new patents.
MORE EFFICIENCY AND FLEXIBILITY WITH THE ROT
ROT's key feature and differences from axial and radial inflow turbines
The ROT configuration makes it possible to convert the energy contained in the organic fluid into mechanical power with higher efficiency than the traditional axial or radial inflow turbine.
Radial Outflow Turbines divert the fluid radially through stages, simplifying blade geometry and enabling multiple stages on a single disc. The ROT is ideal for medium enthalpy geothermal and heat recovery sources.
In Radial Inflow Turbines, the fluid enters perpendicular to the rotation axis, transitioning to the axial direction as it expands within the rotor. This Configuration results in limited flow rates and complexity in achieving multistage configurations.
Axial Turbines handle fluid parallel to the rotation axis, facilitating high flow rates and are commonly used in large-scale power generation.
ROT strengths:
1
NATURAL ACCOMODATION OF WORKING FLUID EXPANSION
As it expands, the fluid encounters greater surface area, causing taller blades in the first and shorter blades in the last stages, thus facilitating a broader range of applicable fluid conditions
2
LOW SPEED TURBINE
No gearbox
High reliability
Low noise
Longer life of the bearings
3
STRAIGHT BLADES AND RADIAL DESIGN
Minimal 3D effects and turbulence
4
EASE OF MECHANICAL GROUP EXTRACTION
No fluid loss or drainage
Easy and rapid maintenance
Less tip leakage and disk friction losses
No “overhaul” maintenance on the turbine
5
SIMPLE DESIGN
Compact solution
Simple and easy construction
6
STANDARD MECHANICAL DESIGN FOR EACH TURBINE FRAME
The fluid-dynamic design of each turbine is optimized in order to reduce supply time, guaranteeing maximum efficiency without the need for mechanical redesign
7
MULTIPLE PRESSURE ADMISSIONS POSSIBLE ON A SINGLE DISK
Cost effective solution
Less limitations on cycle pressure
20% more power than a single level system with a simple configuration
Suitable for temperature heat sources as low as 90°C
8
UP TO 9 STAGES ON A SINGLE-DISK TURBINE
Better exploitation of high enthalpy resources
Extreme flexibility for changing heat source conditions, in terms of flow, temperatures and constituents
Up to 6% additional efficiency over the axial turbine
Previous
Next
Gemini Turbine – The Evolution of Exergy’s Radial Outflow Turbine
Building on the proven success of Exergy’s Radial Outflow Turbine, the new Gemini Turbine marks a major step forward in turbine design and performance. It introduces a dual-inlet and twin rotor stages configuration that double capacity and efficiency on a single shaft — delivering up to 60 MWe per unit.
Developed entirely in-house by Exergy’s turbine team, this innovation enhances stability, simplifies plant design, and offers a new benchmark for large-scale geothermal power generation combining the power of two turbines into one.
Discover how Exergy’s Gemini Turbine delivers improved performance with up to 60 MWe capacity—engineered for next-generation Enhanced (EGS) and Advanced (AGS) geothermal systems.
Gemini Turbine's key features and advantages
While the Radial Outflow Turbine has proven itself as a reliable solution for applications up to 30 MW, the Gemini Turbine pushes boundaries further, drawing on Exergy’s two decades of turbine engineering expertise to deliver unparalleled performance in large-scale geothermal power generation.
Interested in learning how the Gemini Turbine can optimize your large-scale geothermal project? Contact us to schedule a consultation with our engineering and sales teams.
