Cooling method

A closed circuit evaporative fluid cooler/evaporative condenser (10) utilizing a cross flow water-air fluid flow relationship wherein an evaporative liquid recirculating system includes a liquid distribution spray assembly (32) mounted above a bundle (36) of fill sheets. A closed circuit fluid cooling/condensing heat exchanger in the form of coil assembly (42) is supported below the bundle (36) of fill sheets. Each heat exchanger (42) comprises a plurality of parallel coil circuits or modules (60), wherein the inlet (48) of each coil circuit (60) is at a higher elevation adjacent the air outlet side of the heat exchanger, and the fluid outlet manifold (54) of each coil circuit (60) is at the lowest elevation adjacent the air inlet side (37) of the heat exchanger (42). This arrangement ensures that the coolest liquid falling from the fill sheet bundle (36) contacts the region of the coil assembly (42) containing the coolest fluid and that the coolest air entering the air inlet (37) contacts the coil assembly (42) portion containing the coolest fluid. Each coil assembly (42) comprises a plurality of parallel individual coil circuits (60) each having downwardly sloped straight runs (104,106) connected by return bends (98,102) to ensure the complete pass through and drainage of the fluid therein.