| 摘要 |
A method of manufacturing a plate fin (11) for a plate fin and tube heat exchanger in which a sinusoidal enhancement pattern (14) having raised (22), lowered (21) and compound (23) lance elements is stamped into the area between pairs of adjacent fin collars (13) in the same row; also, a plate fin (11) produced by the method. The method minimizes the introduction of stresses into the fin material as well as the stretching and thinning of the material during the manufacturing process, allowing the production of enhanced sinusoidal patterns having relatively shorter wavelengths and relatively more complex enhancement patterns than prior art fins. The method also allows the use of relatively thinner sheet metal feedstock without risking damage to the fin during manufacture.
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