Re: Fw: Work output

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <005601bf1001$a8ca38a0$473ea8d1@rscnwm.com> "Doug Johnson" writes:

> Does the turbo "create" heat, or "absorb" it from the exhaust gas
> ?

Energy input = energy output - law of thermodynamics.  The turbo has
no fuel to burn.  The energy input is heat (which it doesn't use and
is actually an embarrassment) and kinetic - gas mass times velocity.

Most of the heat dissipated by the turbo (by radiation, conduction into
the airflow around it, and to the oil and/or water passing through it)
has been absorbed from the exhaust gases.  Some comes from friction
losses and air compression on the inlet side.

On a related subject - has anyone else ever seen a brown turbo?

I mean the outer cover on the 'hot' side - a light and _very_ uniform
honey brown colour.  Is this a coating of some sort?

--
 Phil Payne
 UK Audi quattro Owners Club
 Phone: 07785 302803   Fax: 0870 0883933