I’ve spent the last year building and testing an aeroponic build, with my focus being on growing lettuce.
I’ve been using these nozzles:
(Note that the information shown on regarding the operating conditions for those nozzles were a recent addition to the page, and were not available when I made the purchase)
And this pump:
which is basically a 100psi 4l/min diaphragm pump.
I have not used a pressure accumulator tank, and my feed line consists simply of resevoir-> pump-> nozzles->resevoir, ie. a closed system.
I’ve been running my system on a 5s on, 20s off frequency, as I noticed that a slightly longer frequency of 8s on, 80s off was resulting in my roots drying out once they grew beyond a certain point.
Based on recent information, I’ve concluded that my system is not a true HPA system.
This information includes
- The general shape of my roots is a slightly conical (oriented with the point down) cylinder, with a top width of approx. 150mm, a bottom width of approx. 50mm, and a total length of approx. 350mm
- The thickness of individual root hairs vary from roughly 2mm diameter to 0.5mm diameter
- The developement of fine root hairs, as seen in an image posted by @Atom, is for the most part non-existant
I will upload pictures of my build, and my roots shortly.
I was previously under the impression that nozzle orifice diameter and pump pressure were my main variables as far as water droplet size was concerned, however I now believe that this might not be the case.
I would appreciate any help with that can be offered to me, especially a guideline to choosing appropriate nozzles. What features am I looking for, aside from orifice size?
As far as pumps are concerned, would my current pump be adequate, if I only changed my nozzles?
What would the effect of an accumulator tank be as far as achieving true HPA be, aside from consistent pressure?
If possible, could someone post a link to an example of suitable components?
Thanks people, your help will be greatly appreciated.