Building an air-lift with the height larger than depth?

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Building an air-lift with the height larger than depth?

Postby chocobombo » Mon 01 Oct 2018, 15:45:51

Hello,

I would like to build an air-lift pump to circulate the watering system.
The system may look as followed. The water from T1 will be pumped (via the orange pipe) to T2. Flow rate about 9m3/h.
Image

I have done some research on how to design an airlift pump. And in all the cases, the lift heights are smaller than the depth (from the air injection point to the surface)
I would like to ask, if it is possible to build an airlift pump for this application. (if yes, any hint on how to design this system)\

Many thanks for your suggestions.
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Re: Building an air-lift with the height larger than depth?

Postby Pssymon » Wed 10 Oct 2018, 21:07:58

Hello and welcome,

I hate to say it but it's not possible the way you designed this system. We are talking about a discharge head of over 1,5 meters. If you want a yield of 9000 liters the maximum discharge head would probably be around 10 centimeters if you are lucky. The system has to be level, even at 5cm of discharge head you're wasting a lot of potential. This system is just not designed for it.

If you have any further ideas or questions, feel free to share them. In a level system, a flowrate of 9000 liters per hour is easily achieved.
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