UVGI Dosage Calculation for the NQ500
The calculation of efficacy of the ultra violet lamps is a function of the resident time of the bacteria within sight of the ultra violet light and the intensity of the light within this "Kill Zone".
| Resident Time | =
CFM/area/lamp length/60 seconds per minute. = 500/2.35 sq.ft. = 212 fpm/60 = 3.69 feet per secon d = 3 feet/3.69 feet per second = 0.813 seconds |
| Lamp Intensity |
= 120 microwatts/cm squared at 1 meter (mfg data) (intensity
multiplier at 5.2" = 39.37"/5.2" = 7.57 x 7.57 x 120 microwatts/cm squared at 5.2" = 6,876 microwatts per cm squared Reflection of light at cabinet surface = 1.5 increase in intensity |
| Total Efficacy | =
0.813 seconds x 6,876 x 1.5 x 4 lamps = 33,541 microwatt-seconds/cm squared |
