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Water Tank vs Battery Bank ?
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Example:
... using a 0.5 hp pump, for 9GPM, at 160', to 9,000 storage tank.
I will only pump on sunny days, about 4-5 hours a day.
That gets me 2,160 gallons on a 4 hour day.
The water is in a tank farm on a hill, and I just use the pressure from the tank, to do my water needs.
After a few days, I'll have all the tanks full, and can last a few cloudy days.
Daily needs are only about 200 gallons.
Storing the water on a hill, is more efficeint than using batteries to pump in the middle of the night.Comment
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You use a small turbine to generate power from the head tank - then you need additional power to refil the head tank. Net negative.
Both the turbine and pump are well under 100% efficiency - maybe 70%.
İt really only works for a free running stream or such.[SIGPIC][/SIGPIC]Comment
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Francis turbine
Head: 10m up
Efficiency: 90%Comment
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Quote from the Wiki - [I]For example, 1000 kilograms of water (1 cubic meter) at the top of a 100 meter tower has a potential energy of about 0.272 kW[SIGPIC][/SIGPIC]Comment
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[QUOTE=russ;10144
On large hydroelectric projects there is some possibility. Residential - zero![/QUOTE]More than a possibility, at least here in the USA. Many of hydro electric dams in the USE have pump back lake for this very purpose and goes back all the way to the great depression of the 20's. However, all areas in the USA have been used up as there is no more water or land to use.MSEE, PEComment
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Thanks all.
To me, I can't re-design battery as I don't have electro-chemical knowledge.
So, I prefer to try with re-design small turbine which could be easier.Comment
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If you have the flow rate, and elevation difference, you CAN use micro-hydro for generation, but considering pumping back and spinning a turbine, you need a large pond, tanks won't hold enough water to be useful. I've got 9,000 at 160' hight in tanks, and to get appreciable power via my 2" fire hydrant, I'd have to drain them in a couple hours, and then take days to refill them.
Water & Power Trenches (+900')
Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-ListerComment
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Thanks for sharing.
Have you used an air tank, with a "T" at the outlet line, to increase pressure ?
I want to put a valve controller, after the "T", so:
when the valve closed then the air pressure increased.
Then the valve opened with an additional pressure.
Then the valve closed again,
then opened again, and so on, and so on.Comment
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Hydro storage - they could do it on the Columbia River in OR/WA possibly - recycling water - commercially there locations but it isn't cheap.
MarineLiner - What are you trying to accomplish with this tee and air tank?[SIGPIC][/SIGPIC]Comment
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The T at the out flow line is for connecting the air tank upward, so the water can't enter it.
When we open and close the valve repeatedly, the water flow will get additional pressure from the air tank (like as bouncing).
But I don't know upto what number the additional pressure can reach.Comment
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It's impossible to use a pressure tank (w/wout bladder) to store water for hydro power. Pressure tanks are used for water delivery, to reduce pump run times, for energy storage, batteries are way better.Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-ListerComment
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