Stirling Motors

With efficiency values of more than 31%, the most efficient installations are clearly outperforming comparable large solar arrays. BOPP collaborated on appropriate projects at test stage and has gained valuable experience and know-how.

The sun catcher reflects the energy from the sun towards the Stirling motor, thereby heating up the gaseous working fluid within the closed cycle system. Expansion and compression of the gas follows due to the temperature differential between the cylinders. The interconnected regenerator serves as a thermal store. This is where the efficiency values stand or falls.

We produce specialist meshes used in the manufacture of the regenerators, fabricating these into sintered circular bundles with a solid block consisting of a few hundred mesh discs. Thanks to these, less heat needs to be absorbed and then released again in order to achieve the same level of mechanical work, which ultimately results in notably higher levels of efficiency.

Our benefits include:

• Advanced and reproducible levels of manufacturing quality
• Exact porosity up to 80%
• Differing designs using discs or sintered bundles
• Customer specific development and manufacture