Back to results
US 2012/0152507 A1Published application
Fabrication method for making brazed heat exchanger with enhanced parting sheets
AssigneeUop LLC
InventorThomas J. Godry
Life of this patent
Estimating the term…
Abstract
Disclosed is a heat exchanger comprising a boiling passage and cooling passage defined by opposite sides of metal walls. Layers of brazing material between the metal walls and a spacer member bond components of the heat exchanger together. It has been found that good quality brazed joints can be made by modifying the brazing thermal cycle to first employing a temperature of about 500° C. for an extended period of time and then elevating the temperature to about 590° to 600° C.
Claims13
A method of constructing a heat exchanger comprising:
- providing a plurality of metal walls having a boiling side, a cooling side and at least one bonding surface;
- applying thermally conductive particles to a boiling side of a plurality of metal components;
- heating said metal walls with applied thermally conductive particles to a first temperature to integrally bonded said thermally conductive particles together to form an enhanced boiling surface,
- assembling said plurality of metal walls with a spacing member so that said boiling sides of said plurality of metal walls define a boiling passage and said cooling sides of said plurality of metal walls define a cooling passage and providing layers of metal between said bonding surfaces of said metal walls and adjacent surfaces of the spacing member;
- and
- heating the assembly to a second temperature that is less than said first temperature to allow for off-gassing of residual amounts of said thermally conductive particles and then heating the assembly to a third temperature that is about 100° C. greater than said second temperature to bond the layers of metal to at least one of the adjacent surfaces of the spacing member and the bonding surfaces of the metal walls.
3 more elements
Dependencies are inferred from the claim text.