Guide to UV Measurement
Cooling Systems
UV systems require airflow and/or water-cooling through or around the lamps to exhaust the heat from the system.
Air-cooling is directional. An arc lamp is cooled by “pulling” air from the reflector side of the lamp through the irradiator with an exhaust blower that is generally connected to ductwork to the outside. Microwave-powered lamps “push” the air through the irradiator with a supply blower, and then exhaust it through the light shielding via an exhaust blower to the outside.
Water-cooled lamps utilize chilled water that is circulated through channels within the irradiator housings. The heat absorbed by the reflector is transferred to the chilled water; the water is then cooled, and recirculated. Airflow may be used in conjunction with the water-cooling.