Wasting Mechanical Energy To Increase Heat Transfer / Thermo Efficiency

Does it sound intuitively dubious to waste good mech. energy to increase friction to increase heat transfer to increase the thermo efficiency of an engine?

The numbers say it won't work, at least not for a spinning cylinder heat transfer situation.

The thing that must be much less than one is the (heat recovered by the regenerator / net power output) X (Clausius number X the Coefficient of friction / Nusselt Number)

The U^3 term doesn't help. Things just keep getting better for lower and lower rotational speeds.

It was a dumb idea to begin with.

Bret Cahill

friction in engines is a source of loss= not good

cheers Bob

Your thermal loss occurs in your burning fuel. If you are trying to take advantage of excess heat produced by the engine, you should look into making an engine more fuel efficient. Try looking into alternative fuels or different cycles. For example a turbine engine is more efficient that a 4 stroke engine.

You can insulate an engine to extract more work. But increased fiction in the drive train does not help, it hinders you power output, therefore decreases efficiency.

Dwayne