[ausev] AusEV Digest, Vol 37, Issue 8

[Aaron Choate]

Guys,
I'm going to answer William's questions off list unless anybody else is
interested in the conversation.  If you want any additional info, I am glad
to answer questions, I just don't want to spam the list with this stuff.

/Aaron

On Tue, Feb 10, 2009 at 10:24 AM, Brian Lasseter <
blasseter.cmpe01 at gtalumni.org> wrote:

> On Tue, Feb 10, 2009 at 7:55 AM, William Gooch <goochb at alum.mit.edu>
> wrote:
> > There's also the option of using the secondary shaft on my traction motor
> to
> > drive the AC compressor using a belt and pulleys, much as the ICE motor
> > did.  I realize this has some drawbacks, but it would be cheaper and
> perhaps
> > less trouble than adding a separate new compressor setup.  I wonder
> whether
> > it might also draw less power from the battery pack.  What experience do
> > folks have with this?  Thanks.
>
>
> The laws of physics are quite clear on this point... you will draw
> more power from the battery pack if you try to run the A/C off of a
> secondary shaft from the traction motor due to mechanical and friction
> losses.  It is most efficient for the A/C to have it's own motor
> running at that motor's most efficient speed.   (This is why some
> newer luxury sedans are moving to all electric air conditioning too...
> it allows them to eek out a few more MPG for the gov't ratings.)
>
> (Besides... it very fun to be able to turn on cold A/C in a parked car.)
>
>
> TTFN,
> Brian "Lasso" Lasseter
>
> "No Sane man will dance."   -Cicero (106-43 B.C.)
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