F - Mech Eng,Light,Heat,Weapons – 28 – D
Patent
F - Mech Eng,Light,Heat,Weapons
28
D
F28D 7/02 (2006.01) B21D 53/02 (2006.01) B21D 53/06 (2006.01) F28D 7/04 (2006.01) F28D 7/08 (2006.01)
Patent
CA 2104489
SPIRAL FLIGHTED DOUBLE WALLED HEAT EXCHANGER ABSTRACT OF THE DISCLOSURE A heat transfer coil and method of manufacture where a second piece of tubing iswound around a first piece of tubing while the first piece is straight, where the first piece of tubing is then formed to define the overall coil shape, and then the first and second pieces of tubing internally sized by internal pressurization to also force the two pieces of tubing into intimate contact with each other.
Blackshaw Andrew L.
Bodrey Douglas M.
Hiller Carl C.
Robinson Glen P. Jr.
Electric Power Research Institute Inc.
Finlayson & Singlehurst
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