Finned heat exchanger having a profiled fin shape

摘要

The finned heat exchanger consists of fins which are turned to and fro between the coverplates. The sheet metal of the fins is profiled in such a way that upon superimposition a structure is produced which resembles a chessboard and has a very high heat exchanging area per unit of volume. The profile can have the following profile shapes in this case: rectangular profile, trapezoidal profile, excessive trapezoidal profile (with acute-angled trapezoidal cones), or similar profile shapes which, upon superimposition, form parallel channels (ducts) through which the medium (gas) flows. In this case, the profiled metal sheet can have an inherent structure such that transverse to the direction of flow the channel wall is corrugated, laterally offset or otherwise structured in such a way that turbulence or a spiral flow is produced. The overall result on the gas side is an increase in the heat exchange and an enlargement of the heat exchange area (compactness).