A heat exchanger (10) is provided to transfer heat between a first and second fluid flow. The heat exchanger 10 includes a flow path (20) provided in the form of one or more heat exchange tubes (40, 40A-C), and a second flow path (30) provided in the form of one or more serpentine heat exchange tubes (42, 42A-C). The tube(s) (40, 40A-C) is (are) "woven" together with the tube(s) (42, 42A-C) such that they are perpendicular to each other. The heat exchanger (10) can provide particular advantages when used as a suction line heat exchanger in a transcritical cooling system (12).