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self powered pump/filter
hi,
I hear you about the sun...I was thinking the same thing myself...I lifted the hose from the drum outlet side and it's running alright fills a coffee cup in about 4 seconds..but I'll try the dye idea...although it has to be going back into the drum or the top tank would simply overflow....anyhow thanks for the reply....by your comments I am thinking it wouldn't stand the test of a larger set up. I don't think it's perpetual motion ..if air gets back into the pipes it stops dead and has to be sucked to get it going again. anyway thanks "how" wrote in message ... "cruxaustralis" wrote in message ... During a break from digging my pond, and basking in the warm Queensland sunshine it occured to me that I could use the hydraulic pressure of the pond to pump/siphon water into my veggie filter. So i built a model using a 20 liter drum and it's been pumping/siphoning away like a beauty for a week. I used a network of 12mm poly irrigation pipe in the bottom of the drum and initially primed/siphoned the outlet line into a plastic tub, about a metre head..with an overflow outlet back to the drum...topped up the level as it got pumping and voila!. A search of the web has rewarded me with no links to something similar..so now I'm beginning to worry that I am missing something obvious in my new found enthusiasm. As a result I now have a niggling doubt that this will all fail when scaled up. Anyone have a clue that might save me from a fundamental error when the real thing is needed? Hi, If you are suggesting that the water from the drum is continually circulating to the tub and back to the drum without the aid of a pump, you have accomplished one of two things. One, proved perpetual motion or Two, spent too much time in the Queensland sun ;-) There is another possibility, that the water is not circulating but is static. Prove this by adding color/dye to the drum and it will immediately color the tub if it is flowing. There is such a thing as a ram pump (google it) but it is also a one way device and I don't think it would work in your situation. L8R -_- how no NEWS is good |
#2
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self powered pump/filter
"cruxaustralis" wrote in message ... During a break from digging my pond, and basking in the warm Queensland sunshine it occured to me that I could use the hydraulic pressure of the pond to pump/siphon water into my veggie filter. So i built a model using a 20 liter drum and it's been pumping/siphoning away like a beauty for a week. I used a network of 12mm poly irrigation pipe in the bottom of the drum and initially primed/siphoned the outlet line into a plastic tub, about a metre head..with an overflow outlet back to the drum...topped up the level as it got pumping and voila!. A search of the web has rewarded me with no links to something similar..so now I'm beginning to worry that I am missing something obvious in my new found enthusiasm. As a result I now have a niggling doubt that this will all fail when scaled up. Anyone have a clue that might save me from a fundamental error when the real thing is needed? Not possible, defies the laws of physics. |
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