Abstract: A closed loop cooling system for cooling machines, comprising a first heat exchanger having a refrigerant on a first side and a coolant on a second side and a coolant loop that circulates the coolant through the system; the coolant loop has a coolant supply header for circulating coolant flowing from the heat exchanger; a plurality of individual machine cooling loops connected to the coolant supply header, each machine cooling loop passing through at least one heat exchanger for cooling two or more fluids employed in an individual machine, and where each machine cooling loop has a flow meter and a regulating valve for adjustment of the coolant flow through the loop; and a coolant return header connected to the machine coolant loops for returning the coolant from the individual machine cooling loops to the first heat exchanger.