Quote:
Originally posted by CoolROD
I can't see why flow rate would affect the UV system...It seems like all we need to know is volume and watts.
If we assume that all of the water will go through the clarifier sooner or later, then can't we spread our volume into a thin sheet and divide the effective watts over this area?
NOTE: This is exactly how Althornin's spreadsheet behaves -play with it!
Al. -don't hesitate to post math here, especially if you already had it typed up...I know that I always enjoy an education...
Also, it would be my bet that a slow flow rate will result in greater efficiency of the UV light kills -much like small doses of penicillin vs. heavier -more complete- doses. Then there is the question of developed tolerance...
|
Well, flow rate affects the time spent in each "round" in the UV light. Try it out, the "S" that is calculated is the survivability of each "round" - i find that for typical flowrates in WC systems, it doesnt vary the survivability much at all.
The only really shady part of my math is that Intensity is measure in mJ/cm^2 - yet we are dealing with the light shining on a VOLUME of water, so i simply used the surface area of that volume. This could be off by a fair margin.
The blue highlighted values are user inputable, where most of the are physical things based on the UV sterilizer you are looking at using and the others are absed on your WC system. Oh and one value is "k", the rate constant, which is different for each pathogen. I pulled one from a source i quoted above -
here
If i examine my spreadsheet, i find that even Airspirit will be satisfied with one fo these, as resevoir size plays a large role also...this is to reference his comment in the previous thread that i dont know how much flow he has
Doesnt matter man - you dont have a 300 liter resevoir either. All he needs is one big enough in diameter for his main line.