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Re: [EVDL] Winter & EVs

Hello Harsha,

The last time I use a engine heater in a ICE was back in 1975, when I was
driving the ICE to work every day. In our parking lot we had rolls of 20
amp receptacles for plugging in. After that when I got my first EV in 1976,
I then plug in the EV at work which maintain the heat and maintain charge.

I am still driving the EV today which is call Transformer I, using the same
GE 11 inch motor, but using a a GM TH-400 semi automatic transmission that I
must shift like a manual transmission. There is no torque converter and the
pump pressure is maintain my a pump and varies with the acceleration and
cruse like much like a ICE, but is control by A GMC vacuum value control by
accelerator linkage.

The batteries are now a 180 volt pack of Trojans T-145's 6 volts, A Zilla
controller and a PFC-50 on board charger. It uses a GMC accessory drive
unit that is normally mounted on a GMC diesel engine, that holds a very
large alternator-inverter unit, air conditional pump, vacuum pump, vacuum
canster, electric power steering, accessory electric motor, and a electric
clutch that can engage the pilot shaft of the main motor which engages which
provides a mechanical regen, that helps slow the EV on icy streets and keeps
the accessories unit power up while the electric accessory motor goes off
line.

You can see this EV at:

http://www.austinev.org/evalbum/470.html

The battery connections are now a battery clamp instead of the terminal wire
lug type, more instruments and switches are added which now monitors the
motor ampere, motor voltage, DC=AC amp and voltage, DC=DC amp and voltage,
AC amp and voltage and DC amp and voltage for the charger. Temperature
meters for the Zilla heat sink, Zilla coolent temperature and main motor
temperature sensors.

Roland




----- Original Message -----
From: <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Friday, September 14, 2007 8:17 PM
Subject: Re: [EVDL] Winter & EVs


> Hi Roland:
> I remember the bug from the days when they (VW) used
> advertise," for
> five dollars, you can fill up the tank and still have some change".In
> those days I
> could not afford to buy one :) and I am "mechanically challenged". So
> when I saw this
> group in Utah advertise a VW to drive off the lot so to say, I am
> tempted. The later
> VW's came equipped with gas-heaters, to me a god-send.VW is said to be
> very airtight.
> Leakage of warm air would be lesser.
>
> What you said about insulation and preheating the car are excellant ideas.
> Years ago I
> used have an interior warmer installed in my car, which really helped
> after a long
> walk across the parking lot, on cold windy days.
>
> I guess a high voltage vehicle is a more viable option in our climate.BTW
> do you not
> use a block heater in your ICE vehicles in Montana?
>
> Regards
> harsha godavari
>
> Roland Wiench wrote:
>
> > Hello Harsha,
> >
> > I live in Montana, where it can get down to 35 below which my EV is
> > design
> > for a 120 degree temperature difference. It takes a lot of equipment,
> > and I
> > do not know if the E-beetle has the room or if it is possible to install
> > a
> > heating system that can work with a on-board DC or AC system and a off
> > board
> > pre heat heating system. My EV has both types of heating systems.
> >
> > The first thing I do, is to insulated the garage walls to 64 R factor,
> > the
> > ceiling to 120 R factor, and use a 19 R factor garage door with triple
> > seals. There is two small windows that face the sunny side, which is 5
> > layers of material which includes 2 panes of outside glass, 1 pane of
> > inside
> > glass with a 6 inch air space, a horizontal insulated blind, and a
> > vertical
> > blind, which is about 20 R factor and when its sunny, I have a heat
> > gain.
> >
> > On the ceiling, I have 24 large diameter 100 watt lamps even space
> > through
> > out the ceiling which are control by six dimmer switches, a lighting
> > contactor and a room line voltage thermostat. There is a ceiling fan
> > the is
> > also control by a built in thermostat if the ceiling temperature gets
> > above
> > 75 degrees.
> >
> > On board the EV, I use three 120 vac heaters. These are under dash
> > convention air type with fans. The driver side is a 640 watt type, the
> > passenger side is a 840 watt and then under the front hood, there is a
> > 1000
> > watt hot water heater with pump that is normally design for a semi
> > truck.
> > This heats the water that comes from a holding tank made out of a 3 inch
> > diameter copper pipe that I had a radiator shop solder on a radiator
> > cap.
> > This tank also acts as a expansion tank.
> >
> > The water goes from the the heater, to a pump and to the existing heater
> > core and back to the tank and then to the heater. I found, that I only
> > need
> > 50 degree water temperature to keep my wind shield clear, because I
> > block
> > the cold air ductwork that tempers the hot air from a engine, that could
> > reach over 200 degrees.
> >
> > I use to have a Beetle at one time, which uses the hot air which goes
> > through a heat exchanger at the engine. If this is the case with your
> > Beetle, than you could install a underdash heater and tap into the
> > heater
> > ductwork.
> >
> > You could get by with one heater for direct convention in the driver
> > compartment and one for putting heat in the duct to keep your windshield
> > clear.
> >
> > Anytime the outside temperature is below 30 and way down to -30, I
> > preheat
> > the EV about 15 minutes before I go. I use a triple pole triple pole
> > switch, (three position ON - Off - ON) 30 amp rated to selected between
> > the
> > on-board heater power, or out-board heater power which is tap off the 50
> > amp
> > main power plug with three 20 amp circuit breakers.
> >
> > The garage with its high R-factor, the EV is mostly at a temperature of
> > 70
> > degrees. The heaters preheat the EV for only about 15 minutes which
> > will
> > raise the inside temperature to 80 degrees or more. When it was about
> > 30
> > below, I could drive to my first destination, let it park for about an
> > hour
> > and it may still be about 50 degrees inside.
> >
> > Also the entire inside of the EV is insulation with 2 inches of blue
> > foam
> > and cover with a marine carpet. The battery boxes are cover with 2
> > inches
> > of foam, a 4 inch air space, another layer of 2 inch foam with each
> > layer of
> > foam cover with a marine carpet.
> >
> > The insulated battery box is under a gold tint lean glass hatch back
> > that
> > allows passive heat from the sun. At 30 below, during a sunny day, I
> > had a
> > battery temperature of about 80 degrees.
> >
> > The on board power to run these 120 vac 60 hz heaters, 120 vac pumps and
> > fans come from two sources. One from a solid state DC-AC inverter rated
> > at
> > 5 kw that comes off the main battery pack. Made by the Dynamote Co. The
> > other one is a alternator-inverter unit which can both provide 13.5 to
> > 16
> > volts at 145 amps and at the same time provide 7 kw at 110 VDC which is
> > then
> > inverted to 6 kw at 120 VDC which is also made by the Dynamote Co.
> >
> > These later alternator-inverter unit, will not fit into a Beetle. I
> > could
> > not use the inverter for this latter unit, because I did not have the
> > room.
> >
> > The advantage I have in using the alternator-inverter unit even its only
> > 7
> > kw at 110 volts, It provides be with a braking regenerative when going
> > on
> > icy roads.
> >
> > You may even be able to convert a 120 vac 60 hz heater units by using
> > the DC
> > power from the batteries just to the heater elements, but you will have
> > to
> > change the fan motors to a 12 vdc source.
> >
> > Roland
> >
> > ----- Original Message -----
> > From: <[email protected]>
> > To: "Electric Vehicle Discussion List" <[email protected]>
> > Sent: Thursday, September 13, 2007 2:56 PM
> > Subject: [EVDL] Winter & EVs
> >
> > > I am seriously considering buying a turnkey E-beetle from Utah. Since
> > > I
> > > live in
> > > the great white north (about 500 miles north of Lee:)), I am very
> > > interested in
> > > keeping myself & the batteries warm and functional. I sent an email to
> > > the
> > > Uth
> > > group and received no reply.
> > >
> > > My question is how do you keep yourself warm and still get 30 to 40
> > > mile
> > > range
> > > per day. Or does on put the ev in the garage until the warm weather
> > > arrives?
> > >
> > > regards
> > > harsha godavari
> > >
> > >
> > >
>
> _______________________________________________
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> http://lists.sjsu.edu/mailman/listinfo/ev
>

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