Do I "need" to circulate....

Do I "need" to circulate....

PostBy: JJLL On: Mon May 19, 2008 10:13 am

I have a kodiak stove which sits about 7-8 ft away from my hot water tank.

The setup with the stove, water coil and hot water tank works fine. But I'm curious if I can get the water just a bit hotter.

So I'm wondering if I install a circulating pump (which I already have) between the tank and stove, would this help boost the water temp.?

I just keep thinking how hot and cozy my stove gets and if the water was constantly circulating, the water would be hotter than it is now.

Any thoughts?

Hand Fed Coal Boiler: Harman SF-360 Boiler

Re: Do I "need" to circulate....

PostBy: LsFarm On: Mon May 19, 2008 10:31 am

It may help, since you already have the pump, I'd give it a try.. But before you plumb it in,, get some temperature readings from the exsisting setup.. get a temp reading on the inlet and outlet of the coal stove's coil.. with actual numbers to work with, any changes can be tracked, and won't be subjective..

You may want to install a ball valve on each side of the circulating pump. This makes for easy repairs in the future, and you can also use the ball valve to 'throttle down' the flow rate if you need to.

I love 'science projects'.. keep us posted on the before and after results.. Do you own a laser thermometer yet??

Greg L

Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Re: Do I "need" to circulate....

PostBy: Freddy On: Mon May 19, 2008 1:58 pm

As it sits the water gravity feeds fromthe coil to the tank? Is this a tempering tank for the water before it goes to a water heater, or is this your domestic supply?

Years back I hand made a coil for a wood stove and gravitied to a 30 gallon copper (wish I still had THAT) tank to temper the water before it went to the electric heater. It worked well. I was in your shoes, wanted a bit more heat, but was afraid I'd start blowing the relief valve so I left it as it was.

I do not think moving the water faster will make a difference, unless the gravity system is such that it really isn't working. Gravity moves water pretty well. I have "instant hot water" at my kitchen sink. The water tank is 35 feet away, one floor down. Gravity keeps the water moving 24/7, no problem!
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined