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Author Topic: Wicking Works  (Read 17568 times)

onthecuttingedge2005

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Re: Wicking Works
« Reply #30 on: December 05, 2009, 04:02:41 AM »
I did the simple experiment 'without' any oneway valves, doesn't look good, there was bleed back into the system through the siphon pipe sucking air in a reverse flow.

I am pretty sure either the siphon pipe needs a oneway valve or the main pipe needs a oneway valve to prevent bleed back. I don't see any other way around it.

FreeEnergy

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Re: Wicking Works
« Reply #31 on: December 05, 2009, 08:37:50 AM »
I did the simple experiment 'without' any oneway valves, doesn't look good, there was bleed back into the system through the siphon pipe sucking air in a reverse flow.

I am pretty sure either the siphon pipe needs a oneway valve or the main pipe needs a oneway valve to prevent bleed back. I don't see any other way around it.

 one way valve won't help in my opinion because there would be a lot of pressure sitting on top of the one way valve and the flow of siphoning won't be enough to breakthrough the valve to keep the circulation going. sorry.
oh well back to the drawing board.

FreeEnergy

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Re: Wicking Works
« Reply #32 on: December 05, 2009, 08:46:05 AM »
what if you used capillary tubes like an outstretched telescope?

theoretically it could go to infinity

i don't get it.
could you be a little more specific on how this should work?
thanks :)

onthecuttingedge2005

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Re: Wicking Works
« Reply #33 on: December 05, 2009, 05:21:14 PM »

 one way valve won't help in my opinion because there would be a lot of pressure sitting on top of the one way valve and the flow of siphoning won't be enough to breakthrough the valve to keep the circulation going. sorry.
oh well back to the drawing board.

I might have to add capillary action to the siphon tube, like making the core of the siphon tube with paper towels, this might do the trick so long as I have a oneway valve in there.

I will see about about adding the additional capillary force to the experiment, if it fails I know that I could get it to work with heat expansion fluids but then again I am trying to avoid the inevitable.

mr_bojangles

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Re: Wicking Works
« Reply #34 on: December 05, 2009, 05:51:24 PM »
i don't get it.
could you be a little more specific on how this should work?
thanks :)

well the capillary effect occurs due to the surface tension variance of water in thin tubes, so one capillary tube of (x) diameter would raise water (y) amount

given that elongating the tube will not have an effect, as the length of the tube does not dictate the amount of water it can raise, but the diameter of the tube itself

with this in mind i think it logical to use increasingly thinner tubes, staggered in a manner as such that the bottom of each proceeding tube would start at the level where the water stops of the preceding one, basically stacking them

image modified from wikipedia, heres the link
http://en.wikipedia.org/wiki/File:Capillarity.svg

FreeEnergy

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Re: Wicking Works
« Reply #35 on: December 05, 2009, 11:35:49 PM »
well the capillary effect occurs due to the surface tension variance of water in thin tubes, so one capillary tube of (x) diameter would raise water (y) amount

given that elongating the tube will not have an effect, as the length of the tube does not dictate the amount of water it can raise, but the diameter of the tube itself

with this in mind i think it logical to use increasingly thinner tubes, staggered in a manner as such that the bottom of each proceeding tube would start at the level where the water stops of the preceding one, basically stacking them

image modified from wikipedia, heres the link
http://en.wikipedia.org/wiki/File:Capillarity.svg

so we would just siphon from the last top capillary tube back down?

mr_bojangles

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Re: Wicking Works
« Reply #36 on: December 06, 2009, 12:30:08 AM »
yes, i don't know if it will work or not, it was an idea, but capillary tubes have a max height, and the only other way to get it to raise water higher is to make it thinner, similar to how a more porous material will absorb more faster

from that i wondered if we "stacked" them if the water level wouldn't change, or possibly if it would add up and give extra height


hansvonlieven

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Re: Wicking Works
« Reply #37 on: December 06, 2009, 01:26:30 AM »
The problem with capillary action is that you can indeed raise a liquid in this fashion but you cannot drain it from that elevated height.
Capillary action relies on interatomic forces between the capillary material (glass tube, porous material and such) and the liquid. The same forces that raise the liquid are the ones that are holding it in place. Sort of like a magnet stuck to a wall.

mr_bojangles

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Re: Wicking Works
« Reply #38 on: December 06, 2009, 03:37:19 AM »
it would be used in combination with the previous set up, this isn't necessarily altering the original idea, just modify it to possibly increase the overall height of the water level

to drain it, the bottom of the first tube could be sealed, and then expose the top to the wick, no pressure variants or anything


like i said i have never tested it nor heard of it, it was just an idea, because like i said before the only way to increase height in a cap tube is to make it thinner, meaning less water, but i just thought it seemed like logically it should be able to be done, getting them to drain is the last step and the easiest

in this application, i wonder if it is possible to use increasingly more porous material to gain distance

FreeEnergy

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Re: Wicking Works
« Reply #39 on: December 06, 2009, 10:25:00 AM »
it would be used in combination with the previous set up, this isn't necessarily altering the original idea, just modify it to possibly increase the overall height of the water level

to drain it, the bottom of the first tube could be sealed, and then expose the top to the wick, no pressure variants or anything


like i said i have never tested it nor heard of it, it was just an idea, because like i said before the only way to increase height in a cap tube is to make it thinner, meaning less water, but i just thought it seemed like logically it should be able to be done, getting them to drain is the last step and the easiest

in this application, i wonder if it is possible to use increasingly more porous material to gain distance

are you going to try this out in real life?

mr_bojangles

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Re: Wicking Works
« Reply #40 on: December 06, 2009, 11:28:49 PM »
i wish i had the materials to, sorry mate

i was putting it out there so someone might get a better idea out of it, or see if anyone has tried it

hansvonlieven

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Re: Wicking Works
« Reply #41 on: December 11, 2009, 01:26:20 AM »
A capillary tube will not drain without external power applied.
Say, you have a very thin capillary tube that raises water one inch. you now remove it. the water will just stay there. The very forces that pulled the water up in the tube are now holding it in place.

turbo

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Re: Wicking Works
« Reply #42 on: December 11, 2009, 02:04:02 AM »
I was Always fasinated by wick's.  :)
How they suck up the fuel in lamps and furnace....
So i even tried to build something like this  :D :D

M.