Heating a small fluid stream.
Heating a small fluid stream.
(OP)
Anyone got a name or source for really small in-line electric heaters? Something in the sub 500W range for heating H2O?
Maybe a semicon supplier, or pharmaceuticals, or lab instruments.
I'm having no luck with google, et al.
Maybe a semicon supplier, or pharmaceuticals, or lab instruments.
I'm having no luck with google, et al.
Keith Cress
kcress - http://www.flaminsystems.com





RE: Heating a small fluid stream.
What kind of heater do these single-cup-of-coffee drip coffee makers use? Cold water resevoir, water heated which drips down through the ground coffee . . .
I've never had one apart to look at it, but you could modulate the heater, if needed, as described in that thread here not so long ago.
RE: Heating a small fluid stream.
Never have torn one of those apart but that's a good idea.
Ah, here's how a coffee maker works. It doesn't help me in this case.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Heating a small fluid stream.
TTFN
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RE: Heating a small fluid stream.
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RE: Heating a small fluid stream.
They sense flow and control the outlet temperature to a preset value. There IS a minimum happy flowrate, but it's pretty small.
RE: Heating a small fluid stream.
If you turn to the myriad insulated heaters like Minco et al produce,(if that's what you're referring too), they use Kapton and, silicone, and various other materials for the insulation. These materials all have low temperature limits. Limits like 400F. This means you may only have a differential of 400 - 200 = 200F which doesn't lend itself to rapid energy flow.
Scotty that is by far the closest thing I've seen! Nice find. How did you find it?
If you notice the liquid heating curve at the bottom - the lowest flow is about 32oz/min. This is 10x more than I have to deal with. It's good to see the numbers off that chart!!
Keith Cress
kcress - http://www.flaminsystems.com
RE: Heating a small fluid stream.
If you really want fast, you might think about an induction heater that puts the heat directly into the piping. I haven't found one for your specific application yet; most appear to be design to actually melt the pipe
http://www.magneforce.com/page/page/2668503.htm
This one appears to tbe smallest I've found:
http://www.ameritherm.com/PDFs/411-0050-10.pdf
It looks like it'll be dumping full power in about 10 ms.
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RE: Heating a small fluid stream.
I've been told about a gas heater that was made by milling a long serpentine path into an aluminum block. The N2 had to wend its way thru this path providing a lot of surface contact. The two faces of the heater were then heated. It apparently worked very well.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Heating a small fluid stream.
Which brings me to:http://www.sunpentown.com/srincow.html, so if you serpentine the pipe across the cooktop, you shuold get some pretty exciting cooking. And at $175 apiece, it's not even that expensive.
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RE: Heating a small fluid stream.
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RE: Heating a small fluid stream.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Heating a small fluid stream.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Heating a small fluid stream.
I heard about a company that uses the fluid as the heater element... but where? (It was some years ago).
JMW
www.ViscoAnalyser.com
RE: Heating a small fluid stream.
It was a brochure tucked away in a drawer - a long time ago I was involved in the thick film hybrids business and it dates back to then I think. Either that or I've just picked it up at a trade show somewhere along the way and filed it with all that stuff! I'm a hoarder or things that will be useful 'eventually'.
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If we learn from our mistakes I'm getting a great education!
RE: Heating a small fluid stream.
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Heating a small fluid stream.
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Heating a small fluid stream.
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Heating a small fluid stream.
Mark Hutton
RE: Heating a small fluid stream.
The fan evaporation ones ahve their own grossness. The wicks get pretty grotey after one or two seasons, and have to replaced.
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RE: Heating a small fluid stream.
Roy
RE: Heating a small fluid stream.
I will have to try that.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Heating a small fluid stream.
Another option if using 1/4" tubing would be to remove the secondary of a transformer and wind the tubing in it's place clamping both ends together so the secondary is effectivly shorted out.
Roy