Methods of manufacturing a flattened tube for use in heat exchangers and heat exchanger comprising such a flattened tube

摘要

Flattened tubes (100) for use in heat exchangers and other systems and associated methods of manufacture and use are described herein. In one embodiment, for example, a method of manufacturing a flattened tube (100) for use in a heat exchanger includes forming a plurality of generally parallel ridges on an internal surface of a generally round tube. The tube can be radially compressed into a generally oblong cross-sectional shape. Individual ridges (212) can be spot welded together at contact points (320) to form a plurality of fluid channels. The ridges can be formed in a generally helical path on the internal surface of the tube. Selected ridges can extend further from the internal surface than other ridges.