A new concept of Stirling engine based on breakthrough innovations
Stiral took part in a collaborative project to develop a Stirling engine producing electricity from a low-temperature (100-140°C) heat source and a cold source (outside air).
The Stirling engine was chosen because its operation is ‘clean’ (coolant-free) and its high theoretical performance (the Stirling cycle comes closest to the ideal cycle imagined by Carnot).
Its theoretical performance is based on the possibility of producing isothermal compression and expansion cycles. Stiral has succeeded in conceptualizing such a device thanks to key innovations:
- micro-mobile-walls© which concentrate in one place both compression and expansion of the working gas, and heat exchange with the external heat exchangers,
- an innovative regenerator
- COMHEX© ultra-compact, high-performance exchangers.
As much as 17% of fuel consumption in industry is lost as inevitable heat, at over 100°C. The Stirling engine can operate in heat-pump mode (running on a source of electricity and a ‘cold’ source), or alternatively in electricity-generator mode (with a ‘hot’ and a ‘cold’ source).
We now have the concept for a second-generation machine, designed to meet industry’s demand for recovery of inevitable heat.
To realise this concept, all that is needed is a suitable industrial and/or financial partnership.