A laser head generates 2,000 Watts (6,824 BTU/Hr) of heat. The fluid temperature must not exceed 20°C (68°F). With a cooling fluid of water, 60 Hz power, at 20°C ambient, what is the appropriate recirculating chiller?
Using the thermal performance graphs (fig 1), draw a horizontal line at the required heat load (2000 W). As shown, the RC022 would match this requirement at 13°C (55°F). This is TIN (the temperature exiting the recirculating chiller). Therefore, the calculation then becomes: