Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
March 28, 2017
Patent Application Number
13864018
Date Filed
April 16, 2013
Patent Citations Received
Patent Primary Examiner
Patent abstract
A heat exchanger for transferring heat between two fluids consists of a shell surrounding at least two tube bundles attached at both ends to a tube header. Each of the tube bundles is constructed from a plurality of individual tubes that are twisted into identical helixes formed about a common helical axis. Because each individual tube is formed in the shape of a helix, rather than as a straight tube, thermal elongation of the individual tubes results in a considerably reduced axial force on the tube attachments and tube header. Use of multiple tube bundles wound with opposite twist direction improves spacing efficiency between tubes.
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