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Water Cooled Screw Glycol Chiller System With Heat Recovery For Milk Cooling Customer reuqired: Cool about 3.5 tons of milk per hour (inhomogeneity) from 37 degrees to 3 degrees.Milk cooled from 37 degrees to 25 degrees by 20 degrees well water for pre-cooling, then cooled down to 3 degrees by chilled water from chiller, 1. pre cooling capacity calculation C (4.2) * M (3500) * T (37-25)/t (3600) * S (1.3) =P 1(63.7KW) The well water flow needed: 63.7 x 0.86 / (37-25) * 1.3 = 5.9m3/h. There must be no less than 5.9m3/h, less than 20 degrees well water to do pre-cooling to ensure the first step to pre-cool milk.