Abstract: A method of enhancing evaporative cooling towers of various types. Such cooling towers have a flow of water, an air intake stream of ambient air and an air exhaust such that the flow of water is cooled by ambient air from the air intake and evaporating a portion of that water flow into the ambient air, and the air discharge stream for the ambient air and a portion of evaporated water from the water flow. The method provides a closed cycle coolant channel having a heated heat discharge portion and a cooled heal sink, placing the cooled portion at the air intake, placing the heated portion in the flow of the air at the air exhaust. The ambient air flow at the intake is cooled by the closed cycle coolant channel, reducing its wet bulb temperature and increasing the capability of the cooling tower to cool the flow of water.