New engines for energy transition:

alphagamma® Stirling engines from Frauscher Motors

We convert heat into electricity: quietly, cleanly and sustainably!

Company

“In contrast to the material world,

the knowledge potential emerging

from Research & Development

knows no end”

Josef Frauscher

This guiding principle of our company’s founder Josef Frauscher highlights the fact that technological research is unceasingly on course to push the boundaries of knowledge. The challenge that the Stirling technology poses is also aimed at a large number of specialized areas, which for us would mean stepping into uncharted territory. The end result is more than 20 years of engine research that became the basis for a sustainable implementation of our visions.

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Research

In the course of engine research and development, we were able to take advantage of a range of support from public funds. In addition to decisive help for the construction and equipment of our research centre, it is particularly the thematic programs of several sponsors that made a significant contribution to our success. In representation of this, we would like to invite you to take a closer look at the results of two extremely successful projects: the lean gas CHP and the biomass gasifier burner.

Click on “Prototypes” to get an impression of our research work in the course of prototype development in the period from 2006 to 2017.

Lean gas CHP

Biogas gasifier burner

Prototypes

New Stirling engine technology

For many years, we focused on improving engines based on the Alpha, Beta, and Gamma principles, achieved only limited success. The main reason for this was the high piston forces in conjunction with lubrication oil-free operation. In the course of solving the problem, the idea arose of reducing the piston forces with the aid of a stepped piston. This resulted in a combination of the alpha process with the gamma process, which is why we chose the term “alphagamma®” process The significant improvements compared to the previous state of the art are not only theoretically demonstrable through thermodynamic calculations but have also been revealed in practical applications after more than 100,000 hours of operational experience.

Detailed information

The novelty of the method has been confirmed by the following patent offices:

European Unitary Patent EP3622167
German Patent No. 10 2017 109967
United States Patent US11,725,607
Japan 2020-513399 (Decision to Grant)
Registration in other countries

Products

In the course of years of research, we learned how to solve complex requirements in the simplest possible way. Reduced to five moving parts, based on alphagamma® technology, we were able to create a motor concept with an integrated generator with properties that enable new energy-related applications. The following two-engine modules form the core of our product range:

Stirling module Gen70

1.5 kW shaft power, 1.2 kW electrical: Basic module for liquid or gaseous fuels or for external heat supply, for example, for 24/48V battery charging, heating, air conditioning and stand-alone solutions.

Stirling module Gen500

8.3 kW shaft power, 7.5 kW electrical: Grid-connected asynchronous generator 3×400V, prepared for external heat supply or for burner equipment for most combustible gases.

continue to product solutions

News

Gen70DR: powerful heart for pellet-CHP

Oct 16, 2024

The production of heat and electricity from solid biomass is a challenge. The disk-shaped heat exchanger was specially developed for operation with combustion gases from pellets, wood chips and pyrolysis gas furnaces. The module was developed for customers in the...

Stirling engines: Equipped for different heat sources!

Jul 31, 2024

The performance of a Stirling engine is significantly influenced by the interface to the heat source. This component is called the heater heat exchanger. The challenge is to allow a high level of thermal energy to flow into a small volume. The heat energy is...

Experimental Edition Set: also available in 48-volt technology!

Apr 11, 2024

In response to requests from numerous micro CHP enthusiasts, we have decided to make the successful Stirling Experimental Edition Set compatible with 48-volt systems. This paves the way for marketable energy solutions in the field of grid independence, backup and...

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