- Sep 17, 2008
You could always enlighten us less-educated folks about this heat-recovery device that you know all about.I note from your comment appended to your reply, implying this commentator may posses an education deficiency, however, not knowing what a heat recovery device is, may in it's self, indicate such a deficiency, and remaining within the Box in imagination is the sign of a "Real" education...
A turbocharger is a heat-recovery device. In wide use on piston engines.
Some of the last airliner radial engines used turbocompounding. There was a turbine wheel driven by the exhaust and connected directly, through gearing, to the crankshaft. Recovered energy from the waste heat.
The turbine wheels in a turbine engine are heat-recovery devices. In a turbojet engine they drive the compressor. In a turboshaft or turboprop engine there are extra turbine stages to extract more of the energy to drive the output shaft (helicopter use, typically) or the propeller. In turbofan engines they drive the fan.
All of these convert heat to mechanical output. The velocity and temperature of the gases after passing through these devices are much diminished, so they are all "heat-recovery" devices.
But you must mean something different that licensed aircraft mechanics, (like me) and degreed engineers (not me) don't know about. What is it?