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Discussion Starter #1
Has anyone up north ever used one of these heaters in
the coolant system? I wonder if installing this
1500watt tank heater to the heater core as a closed
loop, would work for heat, maybe even be able to
connect it to both the AC input when parked, and
switch over to the main battery pack when in motion.

http://www.jcwhitney.com/autoparts/ItemBrowse/c-10101/s-10101/p-100000206202/mediaCode-ZX/appId-100000206202/Pr-p_CATENTRY_ID:100000206202

Do they actually pump the coolant and heat it at the
same time?



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Registered
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70 Posts
Discussion Starter #2
These type do not pump. They are mounted low in the cooling lines and when
they heat the coolent, hot water rises pushing the water which circulates
through the heating loop. It is a very slow heating process and would not
provide enough heat and may be only thermostat to 40 degrees F.

You need to add a pump that is design for hot water, which are the same type
use in hot water heating systems for a building. A small 6 gallon a minute
pump with a head of 6 feet will work. You can adjust the flow with a ball
value down to 1 gallon to keep the temperature constant.

The commercial heavy duty types, that are design for semi trucks, you add a
commercial hot water heating pump and a remote hot water sensor thermostat
that you can adjust for the maximum water temperature you want. These are
normally the same type of control units you can get at a heating supply
store.

These units can get up to 18 inches long and 3 inches in diameter and house
in a stainless steel housing.

I normally set the hot water high limit Honeywell aquastat temperature
control to 180 degrees with a mininum temperature of 160 degrees for a 20
degrees differential.

I can normally preheat the water to 180 F degrees with commercial power and
have enough storage for 5 miles of driving before my on board power source
has to come on. It only takes about 5 to 10 minutes to rise the temperature
to the high limit.

This type of heating system, is control with solid state relays, a internal
cab thermostat, and monitoring the water temperature with standard engine
coolent sensors. It is plumb about the way a hot water heating system for a
building is done. You have expansion tanks with a filler cap, bleed out
values to get rid of any air in the system and a pressure control value to
maintain a steady water pressure of 15 psi.

Roland




----- Original Message -----
From: "M. Barkley" <[email protected]>
To: "EVDL.ORG EVDL.org" <[email protected]>
Sent: Tuesday, October 30, 2007 9:05 PM
Subject: [EVDL] Tank Heater ?


> Has anyone up north ever used one of these heaters in
> the coolant system? I wonder if installing this
> 1500watt tank heater to the heater core as a closed
> loop, would work for heat, maybe even be able to
> connect it to both the AC input when parked, and
> switch over to the main battery pack when in motion.
>
> http://www.jcwhitney.com/autoparts/ItemBrowse/c-10101/s-10101/p-100000206202/mediaCode-ZX/appId-100000206202/Pr-p_CATENTRY_ID:100000206202
>
> Do they actually pump the coolant and heat it at the
> same time?
>
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
 
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