Hi Jan, Bill and All,
Of all heaters diesel!!! Come on!! If you live where you must
have one because your EV isn't insulated like 99%, go propane, CNG at least.
Better could be E blankets, seat heaters or an E jacket/pants.
Also preheat the EV from the grid. Another is make a heat airbag heat blowing
up the open bottom flowing under/over the seat, body to the armpit would heat
one on just 100-200 wts even in really cold weather.
For mine I'm going repackaged 6k btu window A/C unit with air
doors to switch from heating to cooling run from an AC pack voltage inverter.
An interesting way is the reverse of a Fla VW bus EV that used
braking in traffic to power his A/C as regen in a way. One could reverse
that and use it as heat using a belt driven compressor A/C unit turned on by
the brake light or a switch for more A/C, with the air doors to switch back
and forth.
Got my new EV trike pickup legal driving down the road yesterday.
Latter it'll get a full aero cabin on it.
Jerry Dycus
On Tuesday, October 28, 2014 1:47 AM, Bill Dube via EV <[email protected]>
wrote:
Reverse-cycle air conditioning (heat pump) uses typically three times
less energy than a resistive heater for the same amount of heat.
Plus you can use it for A/C in the summer. This is what the OEM EV's do.
Pricey, however. A resistive heater is probably a more economic choice,
however. Next size up in cells costs less than a heat pump and will
likely give better overall service life due to the lower DOD in the
summer months. Also, run the heater for a few minutes while still
plugged in to warm up the cabin. Takes the chill off with zero load on
the battery.
>>>>
To be humorous, but much to the point: Why not simply burn coal for
cabin heat? Better yet, lignite.
_Much_ cheaper and more compact than diesel fuel. A bit higher
greenhouse emissions but ......
Bill D.
On 10/27/2014 10:24 PM, Jan Steinman via EV wrote:
> Perhaps this is a sacrilege on this list, but I'm planning to provide cabin
> heat in my 1981 Electranagon with... diesel fuel!
>
> I got hold of an old Webasto hydronic heater. You can find them used among
> boat people, bulletin boards at marinas, etc. They sip a tiny bit of diesel
> fuel, and turn it into fairly large quantities of hot water, which I plan to
> run through my Vanagon's heater core.
>
> Electricity is (as HT Odum would put it) a "high transformity fuel," meaning
> it is highly refined and contains a lot of embedded energy. Why waste it
> heating up resistors? A 3kW electric heater running for an hour uses up over
> ten percent of a typical EV battery, whereas one tank of diesel will last me
> all winter.
>
> Anyway, just a thought...
>
> Jan
>
>
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