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Free Piston Resonance Stirling Engine

Reliable and efficient combined heat and power units

September 2019
Gallery Free Piston Resonance Stirling Engine 1
Gallery Free Piston Resonance Stirling Engine 1


Free Piston Resonance Stirling Engine helps reuse lost heat to produce electricity.

It is a new type of innovative heating, based on the free piston resonance Stirling principle, which primarily generates 25% electrical energy from the supplied energy. This mechanism uses waste heat from the process of burning the fossil resources, some energy is released at temperatures of some 1200 to 1400°C, serving to heat radiators up to merely 40 or 50°C. This downgrading of the heat is an irreversible, highly inefficient process. In Combined Heat and Power units (CHP), the combustion heat is released at high temperatures for powering an engine producing electricity. In addition, the engine cooling heat remains available for heating purposes and is thus recovered from the Free Piston Resonance Stirling Engine.

Label Date September 5, 2019
From Switzerland
Maturity stage Prototype testing 1:1 in the lab
Looking For Visibility ; Partners ; Investors

The environmental benefits

  • 50% energy savings as compared to conventional fossil fuel fired equipment
  • 50% savings of CO2 when operated with natural gas
  • Up to 50% renewable or biogas may be blended into the natural gas, reducing fossil fuel consumption accordingly

The Financial benefits

  • A net gain (as compared to conventional applications) amounting to 2'500 Dollars annually

Activity Region

  • /



  • Headquarters
  • Activity

Company Profile


realizes innovative and complex precision mechanics and assemblies, as efficient free-piston Stirling engines.

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Headquarters 3174 Thörishaus, Switzerland

Networking Partner


As an expert for the innovation scene in energy and environmental technologies, CleantechAlps (Sion, Switzerland) is a hub for the cleantech ecosystem, connecting its stakeholders with relevant partners.

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Solutions Associated 65

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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Stirling has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.