The Free On-line Aquaculture Dictionary
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The Free On-line Aquaculture Dictionary |
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| Air Lift calculation |
| Maximum water flow from an airlift pump | |||
| Limitations of calculation (outwith these parameters the calculations will become less accurate): | |||
| Pipe diameter 1.5 - 8cm | |||
| Pipe length 60 - 300 cm | |||
| Q = ((0.758 x (%s)1.5 x ht0.33) + 0.01196) x d2.2 | |||
| Where ; | |||
| Q | = | Water flow rate, litres per minute | |
| ht | = | Total length of pipe (cm) | |
| d | = | diameter of pipe (cm) | |
| %s | = | Percent of pipe under water (measured from point of diffuser to discharge) | |
| Air requirements for optimal water flow are typically 8-9% of the water volume. Above 10%, normal bubble flow ceases and the efficiency of the airlift drops rapidly | |||