Getting More Out of Your Pad System’s Circulation Pump

It is fairly common knowledge that air speed, and therefore cooling, in a tunnel house is affected by the amount of static pressure the tunnel fans are required to work against. As static pressure increases, the amount of air moved by tunnel fans decreases, reducing wind speed and the associated wind chill effect. What many producers might not be aware of is that just as high static air pressure reduces the amount wind-chill effect, evaporative cooling pad circulation pumps working under excessi...ve water pressure can significantly reduce water flow over evaporative cooling pads and thus the amount of cooling produced by the pads.