Patent ID: 7441412

Claim:
A heat transfer system comprising: an air-cooled heat exchanger system having an evaporator, condenser, compressor and a fan for forcing air over a heat exchange surface for effecting heat transfer; a mist generator having at least one nozzle for directing a stream of fine mist or atomized liquid coolant into the air, the mist generator being coupled to a supply of liquid coolant; a controller for controlling the degree of mist or atomized coolant generated by the mist generator; and a fiberglass filter element positioned between the at least one nozzle and the heat exchange surface for capturing droplets of liquid coolant, the at least one nozzle being spaced apart from the filter element for directing the stream directly into the air surrounding the filter element, and wherein the controller includes a liquid sensor for sensing drainage of liquid coolant from the filter element, the controller adjusting the degree of mist or atomized liquid coolant generated by the mist generator in response to a preselected drainage of liquid coolant.