Is that a valved 2-stroke, or valveless
(I mean of courese: with ports) or an opposed piston?
I've been looking for smaller 2-stroke diesels, but they are hard to find in Holland. I found and bought though a single cilinder, with ports, air cooled, 500cc. Will be used for experients!
Couldn't wait for an answer, had to find out
. Man, opposed piston, would love to have a motor like that!!
Unfortunatly we hardly have any in Holland...
Back to the project, let's make a little side step:
Imagine a piramide shaped chamber with an open basis and an open, cut off, top.
Now place a radiator (connected to the motor's cooling system) on the base of the piramide and a compressor (turbo, roots, driven by the main shaft) on the top of that piramide.
After the compressor we'll make another chamber which has at the other end again (like the exhaust chamber) a turbine This turbine (or air-motor) will also drive the main shaft and will be set and sized to work as a nozzle again.
So what we have now is a radiator placed on a funnel, a compressor sucking in fresh air through that radiator and creating an (significant) overpressure in the folowing chamber because that chamber is nozzled by the little turbine/air-motor.
Seems silly so far...will only cause performance loss...
But, the performance loss caused by the compressor will be partly regained by the turbine/air motor.
Now let's say that the air that's sucked through the radiator is warmed up to 70 celsius. Then again the temperature in the pressurized chamber (like our exhaust example) will be higher, depending on the pressure.
If we would somehow cool down the temperature of the air in the pressurized chamber back to 70 celsius (or colder), what would happen to the temperature of the air coming out of the turbine/air-motor? Could it become (even more) colder?