Method for braze-joining spirally wound tapes to inner walls of heat exchanger tubes
The present invention is directed to a method of fabricating heat exchanger tubes in which twisted tapes are utilized for promoting turbulence and heat transfer. The method of the present invention provides for the brazing of the tapes to the inner walls of the tubes for enhancing heat transfer between the fluid within the conduit and a fluid medium outside of the conduit by conduction through the tape. The braze joint of the present invention is coextensive with the tape over the entire length thereof within the conduit. The practice of the present invention is achieved by placing a filler wire of brazing metal along the tape at a location removed from the side walls and then heating the conduit and tape sufficiently to effect the displacement of the filler metal by wicking to the contact point between the tape and the conduit wall to form a braze joint coextensive with the length of the tape within the conduit. This arrangement provides maximum heat transfer and assures that the tape is in contact with the conduit over the entire common length thereof.
- Assignee:
- Dept. of Energy
- Patent Number(s):
- US 4466567
- OSTI ID:
- 6308998
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420200* -- Engineering-- Facilities
Equipment
& Techniques
ALLOYS
BRAZED JOINTS
BRAZING
BRAZING ALLOYS
CONFIGURATION
CONTROL
ENERGY TRANSFER
FABRICATION
FLUID FLOW
HEAT EXCHANGERS
HEAT TRANSFER
JOINING
JOINTS
PROCESS CONTROL
SPIRAL CONFIGURATION
TUBES
TURBULENT FLOW
WELDED JOINTS
WELDING
WIRES