Re: Ceramic heating element efficiency

["Bob Rice" <bobrice@snet.net>]

----- Original Message -----
From: Rod Hower <Rod.Hower@ametek.com>
To: <ev@listproc.sjsu.edu>
Sent: Tuesday, October 22, 2002 8:09 AM
Subject: Re: Ceramic heating element efficiency


>   Hi Rod;

    Wow! That must be some heater! At those amps, I would think you'd come
in at 10-15 amps @200 volts. Yes I did the dressing for drivin' gig. But it
is tough to give up breathing, been doing it for years, used to it<g>! The
#$%^ windshield fogs up real quick in the cold, I found. EVen if ya can blow
a bit of warm air on the windshield, in fact the CT car inspectiors want to
see defrost action when they check a car. They havya turn onn "Defrost" and
feel to see if anything comes out. Becides, it sure is nice to go out and
turn the heater/defroster on before you set out, melts the snow an' ice.
ASlong these lines sure would be nice to have a heated windshield, like the
newer locomotives have, wires coming off the wires imbedded in the glass.
You don't see them, but they don't ice an' fog up. Guess if ya were doing a
no- holds-barred- EV ya could have something like that.
     Seeya

     Bob...more hot air on warm air.

> I have found the best heater is a good winter coat and some boots.
> This may sound stupid, but the 25-40amp current draw on my 200V NiCd pack
> seems to be more than I'm willing to give up when the winter coat works
> just fine.
> My wife disagrees, but I just tell her the heater is broken and save
plenty
> of amp-hours
> in the process :-)
> Rod
>
>
>
> On 21 Oct 2002 at 17:40, Victor Tikhonov wrote:
>
> > Can one estimate how efficient ceramic heaters are in terms of
> > converting electric watts into Joules (sorry, BTUs)?
> >
> > I want to know if I get, say 100V 5A ceramic heater(s) in the place
> > of former heater core and blow an air through it, will I get
> > more/equal/less heat than if I get 100V 5A water heater, immerse it
> > in a small water tank circulating hot water through the stock core,
> > and blow equal amount of air through that core?
>
> The more direct the connection between the busy little electrons and the
> occupants' bodies, the lower the losses.  Probably the ideal heater is
> heated
> suits for the driver and passengers.
>
> If you are going to heat the air in the vehicle, the more efficient way is
> to heat
> the air directly with a heating element of some kind.  IMO, the only
> advantage
> to a liquid heater is that it's easier to install because you can leave
the
> old
> heater core in place.  But it heats up more slowly, and (potentially)
> wastes
> more energy through losses in the tank and plumbing.
>
> David Roden
> Akron OH USA
>
>
>
>