Key features of this solution are:
- Combustion occurs at atmospheric pressure.
- The "working fluid" is the primary air: combustion products never contact moving parts.
- Heat is transfered from the combustion products to compressed primary air.
- End to end synopsis: primary air is drawn in, isothermally compressed, heated via the exhaust, adiabatically expanded, combusted, then cooled via the compressed primary air.
The same inventor invented a better heat exchanger.
The inventor bills this as an all-fuel solution. However, the device lacks any provision for secondary air which is important for efficient biomass combustion. It is quite possible that the device could be improved with "parallel streams" of primary and secondary air undergoing the above described process. (Meaning there'd be two different cylinder sizes.)
The guy lives in california. You think he'd be up for integrating his prototype with a GEK/BEK?
- Wikipedia article on the original Ericsson cycle concept.
- Company website for the modern "afterburning" variant.
- US Patent 5,894,729, which introduces the afterburning variant in detail.
- Patent 7,028,476 newer version of the above.
- PDF of a marketing Powerpoint for the new engine.