frauscher thermal motors has been researching stirling engines according to the alpha, beta and gamma configuration since 2001. The result is highly efficient stirling engines based on a new process, which is a combination of the alpha stirling engine with the gamma stirling engine.


Reducing resource waste and pollution based on highly advanced technology as the result of intensive research and development


Using special fuels of biogenic origin and waste heat to generate energy.


Since 2001, we have been conducting research in the field of thermodynamic engines, particularly on Stirling engines of various designs. In this time, we have acquired extensive knowledge covering a broad range of that technology and those measures that support a rapid implementation of design studies in prototype manufacturing. Advantages and disadvantages from the state of the art were analysed with seven operable prototypes in alpha, beta and gamma configuration and were verified on the test stand. The result is a close-to-production engine with an integrated generator having a power of 5 kWel (for details see Prototypes / The A600 engine). The engine is released for R&D operations and is the basis for the development of more efficient engines.
Currently we are working on environmentally friendly burner solutions and a newly developed method of the hydraulic load distribution between the pistons which represents an innovative continuation of our research work in the alphagamma® engines.

With the development of alphagamma® engines, we have established a solid basic technology for the efficient conversion of thermal energy into mechanical energy.
As we are open for a broad range of heat sources, we are flexible in developing solutions for a combined heat and power unit (CHP).
In accordance with our company philosophy, biogenic fuels are taking an important position.

Currently we are focusing on the following projects:
Development – lean gas CHP: Use of sewage gas, landfill gas or other lean gas.
Solid biomass: Heat generation through gasification and combustion of primarily wood and wood waste.
Fluidised bed combustion: For other hardly flammable solid biomass, e.g. sewage sludge pellets.

frauscher thermal motors GmbH
A-4774 St. Marienkirchen
Gewerbestraße 7
T: +43 7711 318 20-0

Our opening hours:
Monday to Thursday: 07:00 - 11:45 und 12:30 - 16.30 Uhr
Friday: 07:00 - 11.45 Uhr

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