Patent ID: 6938427

Claim:
A system for reducing the temperature of a condenser fluid used in a condenser of an air conditioning system, comprising: a first heat exchanger for receiving the condenser fluid from the condenser and reducing the temperature of the condenser fluid using a coolant fluids; a second heat exchanger for reducing the temperature of the coolant fluid received from the first heat exchanger by passing the coolant fluid across a plurality of tubes through which a refrigerant flows and for returning the coolant fluid to the first heat exchanger; and at least one cooling unit for reducing the temperature of the refrigerant to a temperature less than a temperature of the coolant fluid; wherein the first heat exchanger comprises a multi-pass heat exchanger, comprising: a plurality of concentric tubes configured to pass the condenser fluid between an outside surface of at least one inner tube and an inside surface of at least one outer tube and to pass the coolant fluid through a lumen of the at least one inner tube and to contact the coolant fluid with the outside surface of the at least one outer tube.