Right now I am using nine components intended for home air ionizers in parallel, I'd like to build one big one. I've heard that if one keeps the discharge voltage at -4kV, this produces negative ionization with a minimum of ozone, but I'd like to know more than that, e.g., where that voltage arises from, whether and how it changes with temperature and/or current applied, et cetera. And I'd like to keep it as simple as possible, though I probably can still pull out my long-ago calculus if I must. Suggestions?
AFAIK generate your 4kV using off the shelf components. The trick is getting the electrons off the wire, and into the air. Sharp points are your friend here. An electron at the tip is repelled by all electrons on the surface of the point behind it.
In practice, the more common practice is to use a very small diameter wire. The tight radius of the wire gives the same effect. See the guts of a photocopier.
Actual current is tiny. Parasitic losses of your circuit, and fans to move the ionized air will be much larger.
Thoughts on removing ozone:
- This is a ppm problem. Would introducing a small amount of hydrocarbon along with a UV light source cause the ozone to recombine? Do the reaction in a mirror chamber so that the light has many chances to excite an ozone molecule.
- Ozone is used for water purification. Implication is that it is soluble in water. Don't know how the solubility compares to that of oxygen. Use something the the stack scrubbers on power plants, where the air rises through a rain of water droplets just barely large enough to fall.