Patent ID: 6907921

Claim:
A heat exchanger for use with active fluid transport, comprising: (a) a first layer of polymeric film material having first and second major surfaces, wherein the first major surface includes a structured surface having a plurality of flow channels that extend from a first point to a second point along the surface of the first layer and that have a minimum aspect ratio of the channel's length to its hydraulic radius of about 10:1 and a hydraulic radius of no greater than about 300 micrometers; (b) a first cover layer that overlies at least a portion of the structured polymeric surface and includes a closing surface to cover at least a portion of the plurality of flow channels to make plural substantially discrete flow passages; and (c) a manifold in fluid communication with the substantially discrete flow passages to allow a potential from a potential source to promote fluid movement through the passages from a first potential to a second potential, such fluid movement for thermally affecting the first cover layer of material for promoting heat transfer between the moving fluid and the first cover layer.