Tube heat exchanger having spacers

Abstract

The present invention relates to a heat exchanger ( 1 ) comprising a bundle of tubes ( 2 ) arranged parallel to one another and inside of which a first heat transfer fluid is intended to circulate, a second fluid being intended to pass through the bundle of tubes ( 2 ) between said tubes ( 2 ), said bundle of tubes ( 2 ) comprising spacers ( 6 ) which are disposed between said tubes ( 2 ), said spacers ( 6 ) having corrugations ( 60 ) extending in the longitudinal direction of the tubes ( 2 ), said corrugations ( 60 ) having ridges ( 61 ) in contact with said tubes ( 2 ) and sidewalls ( 62 ) connecting said ridges ( 61 ), the spacers ( 6 ) comprising a first portion ( 6 A) and a second portion ( 6 B), the first portion ( 6 A) being arranged upstream of the second portion ( 6 B) in the direction of flow of the second heat transfer fluid, wherein the first portion ( 6 A) protrudes from the front edge of the tubes ( 2 ), the ridges ( 61 ) of the first portion ( 6 A) having a profile having a flat ( 64 ) and the ridges ( 61 ) of the second portion ( 6 B) having a rounded profile ( 65 ) such that the corrugations ( 60 ) have a sinusoidal profile.

1 . A heat exchanger comprising:
 a bundle of tubes disposed parallel to one another and inside which a first heat transfer fluid is intended to circulate, a second fluid being intended to traverse the bundle of tubes between said tubes,   said bundle of tubes having fins disposed between said tubes, said fins having corrugations extending in the direction of the length of the tubes,   said corrugations having peaks in contact with said tubes and flanks connecting said peaks wherein the fins have a first portion and a second portion,   the first portion being disposed upstream of the second portion in the direction in which the second heat transfer fluid passes through, the first portion projecting beyond the front edge of the tubes,   the peaks of the first portion having a profile exhibiting a flat part and the peaks of the second portion having a rounded profile such that the corrugations have a sinusoidal profile.   
     
     
         2 . The heat exchanger as claimed in  claim 1 , wherein the second portion extends over 100% to 66% of the width of the tubes. 
     
     
         3 . The heat exchanger as claimed in  claim 1 , wherein the first and second portions are made from one and the same part. 
     
     
         4 . The heat exchanger as claimed in  claim 1 , wherein the first and second portions are made from two separate parts. 
     
     
         5 . The heat exchanger as claimed in  claim 4 , wherein the pitch of the corrugations of the first portion and the pitch of the corrugations of the second portion are different. 
     
     
         6 . The heat exchanger as claimed in  claim 5 , characterized in that the pitch of the corrugations of the first portion is greater than the pitch of the corrugations of the second portion. 
     
     
         7 . The heat exchanger as claimed in  claim 4 , characterized in that the thickness of the first portion is greater than the thickness of the second portion. 
     
     
         8 . The heat exchanger as claimed in  claim 4 , wherein the first portion has, in the direction of the width of the tubes, at least two series of slots offset with respect to one another. 
     
     
         9 . The heat exchanger as claimed in  claim 1 , wherein the first portion extends along a rectilinear profile in the direction of the width of the tubes. 
     
     
         10 . The heat exchanger as claimed in  claim 1 , wherein the first portion extends along a corrugated profile in the direction of the width of the tubes.