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Author Topic: hot water heat exchanger  (Read 5499 times)

Offline Frank Pender - AKA "Tail Gunner"

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hot water heat exchanger
« on: December 07, 2008, 04:22:19 PM »

What I am looking for is a radiator type unit to run another container for drying lumber.  I use as Taylor hot water furnace now and would use to heat the additional container, with separate thermostats, hot water lines and all.  HELP!

Offline Kirk Allen

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Re: hot water heat exchanger
« Reply #1 on: December 07, 2008, 06:14:50 PM »
Central Boilers sells them.  That is what I put in my furnace plenum for my house heat. 

I will try to track down a web site.
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Offline Frank Pender - AKA "Tail Gunner"

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Re: hot water heat exchanger
« Reply #2 on: December 07, 2008, 10:17:35 PM »
What do you think the costs for a new one would cost?  I found a dealer about 35 miles away.

Offline Kirk Allen

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Re: hot water heat exchanger
« Reply #3 on: December 08, 2008, 08:15:27 AM »
If I recall mine was $175.00
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Offline Murf

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Re: hot water heat exchanger
« Reply #4 on: December 08, 2008, 11:48:11 AM »
Frank, as long as the temps & pressure you're running are not too high, check with your auto wrecker.

The A/C condensor out of any good-sized car or truck makes a dandy heat exchanger. They're cheap and very high efficiency.

If you need more transfer than one will handle just make up a manifold and gang several of them together.

I've successfully used many of them for just such a re-use.
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Offline Kirk Allen

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Re: hot water heat exchanger
« Reply #5 on: December 08, 2008, 11:53:00 AM »
Now that is a great idea! 

Thanks
Murf! 
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Offline Frank Pender - AKA "Tail Gunner"

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Re: hot water heat exchanger
« Reply #6 on: December 09, 2008, 08:58:15 AM »
When are you coming this was, Murf, for doing the installation? ;D

I also thought about using two large truck radiators in secquence, but well spaced,with fans behind them.  Any thoughts.  I do have the radiators.

Offline Kirk Allen

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Re: hot water heat exchanger
« Reply #7 on: December 09, 2008, 10:07:24 AM »
Those would work well Frank.

One of our locals has a radiator out of a D-9 cat and a giant fan behind it to heat his shop. 
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Offline Murf

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Re: hot water heat exchanger
« Reply #8 on: December 10, 2008, 09:53:00 AM »
As Kirk mentioned, radiators do work well, but, first of all they require pretty good flow, and because of the shape and design, they like to be vertical.

Besides, the rad is usually a big pipe in and out, the A/C condensor is usually a 1/2" or 3/4" inlet & outlet. Also they generally have nice radius turns and the liquid flows really well through them.

I used several inline with each other to heat the operators cab on a firewood processor, it used the hydraulic fluid return line as a heat source. It cooled the hydraulics and warmed the cab at the same time.

It worked too well though, the operator is nearly down to his skivvies making firewood unless its a very cold day.  :laugh:
Don't blame me for Murphy's Law, I'm a victim too!!!