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Wood Stove Heat Exchanger - Electronic help required!

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joda Part of things Posts: 672	Wood Stove Heat Exchanger - Electronic help required! joda @joda
	Dec 8, 2017 13:19:56 GMT Select Post Deselect Post Link to Post Back to Top
	I have recently installed a large wood burner in the garage, however i need to move the air around, so i have made a heat exchanger from a 25ltr barrel and 12volt car electric radiator fan. My problem, the fan spins to fast at 12volt, i need a resistor/control module that i can use to reduce the speed. I purchased one from ebay for £6 which worked a treat, however it went on fire after 30seconds of use. I'm looking for a cheep, of the peg solution, anyone have any suggestions?


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welshpug Posted a lot Posts: 4,328	Wood Stove Heat Exchanger - Electronic help required! welshpug @welshpug
	Dec 8, 2017 13:52:39 GMT Select Post Deselect Post Link to Post Back to Top
	get to a scrapyard and find a low speed cooling fan resistor, pretty common on older pre canbus/multiplex single fan twin speed french things.
	ZX 16v, 205 GTI. my ZX's project thread - retrorides.proboards.com/thread/151997/16v-project-pt2-power-upgrades

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Rebuilda Part of things Posts: 689	Wood Stove Heat Exchanger - Electronic help required! Rebuilda @rebuilda
	Dec 8, 2017 14:31:01 GMT Select Post Deselect Post Link to Post Back to Top
	You may be able to use a pulse controller switching a relay. That would give you more variations in speed too.
	1988 DUTTON LEGERRA MK1 - SPARES DONOR 1989 DUTTON LEGERRA MK2 - CURRENT PROJECT 1990 DUTTON LEGERRA ZS MK2 1990 DUTTON LEGERRA ZS MK2 DUTTON PHAETON S2 - Resting DUTTON PHAETON S4 - Resting DUTTON PHAETON S4 - PROJECT X DUTTON SIERRA S2 - Resting

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fuldatramp Part of things Posts: 299	Wood Stove Heat Exchanger - Electronic help required! fuldatramp @fuldatramp
	Dec 10, 2017 22:57:02 GMT Select Post Deselect Post Link to Post Back to Top
	If I was doing this I’d use radio controlled car parts, a nice pulse width modulation esc would sort you out, for the esc I’d use something like this rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F321699233805 Which would be fine for 12v speed control, And the cooling fan on it would make sure it doesn’t burnout. then you’d need one of these servo testers, rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F263302048248 The servo tester would plug into the esc and could be dialled in to the correct speed. I don’t know how much power your fan takes but if it’s minimal you might get away with using a cheaper esc like rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F282551942279 But obviously it wouldn’t be rated as highly, might not last as long and doesn’t have its own integrated cooling fan
	Last Edit: Dec 10, 2017 23:04:42 GMT by fuldatramp

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village Part of things Always carries a toolbox. Because Volkswagen....... Posts: 567	Wood Stove Heat Exchanger - Electronic help required! village @village
	Dec 12, 2017 15:39:16 GMT Select Post Deselect Post Link to Post Back to Top
	Don't slow the fan down , fit a smaller set of blades.......
	"The White Van is strong with this one...." Chris "Chesney" Allen 1976-2005 RIP

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jimi Club Retro Rides Member Posts: 1,815	Wood Stove Heat Exchanger - Electronic help required! jimi @jimil
	Dec 13, 2017 23:10:25 GMT Select Post Deselect Post Link to Post Back to Top
	Fit a 24v fan, it will run at approx half it's rated speed on 24v
	Black is not a colour ! .... Its the absence of colour

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dreadnought Part of things Posts: 453	Wood Stove Heat Exchanger - Electronic help required! dreadnought @dreadnought
	Dec 15, 2017 18:52:22 GMT Select Post Deselect Post Link to Post Back to Top
	get a stove fan. they are on ebay. work by some kind of witchcraft, they just sit on top of the woodburner and get going once it gets up to temperature. they just move the air around, and they work very well, the hot air coming from the top of the stove gets blown around rather than just going straight up, the woodburner is the only heating we have in our bungalow and the fan just moves the air to equalise the temp everywhere. and after the initial cost (about £30) they use no electric or batteries. really worth looking into.
	Last Edit: Dec 15, 2017 18:54:36 GMT by dreadnought Toyota mk3 supra. retro goodness.

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blackpopracing Posted hell of a lot Posts: 7,527	Wood Stove Heat Exchanger - Electronic help required! blackpopracing @blackpopracing
	Dec 15, 2017 19:59:36 GMT Select Post Deselect Post Link to Post Back to Top
	Wire in a single headlamp bulb - the more bulbs you add, the faster it will run.
	www.case-design.co.uk www.hotrodphotos.co.uk

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