Web design and arrangement for reducing a radial distribution fault in a wound heat exchanger

Abstract

The invention relates to a heat exchanger (1) for the indirect transfer of heat between a first and at least one second medium (M, M′), having a jacket space (I) for receiving the first medium (M), a core pipe (20) arranged in the jacket space (I), a pipe bundle (15) arranged in the jacket space (I), which bundle comprises a plurality of pipes (10) which are each wound around the core pipe (20) such that the pipe bundle (15) has a plurality of pipe layers arranged on top of each other (100, 101, 102, 103) which each comprise at least one pipe (10), a pipe bundle gap (200, 201, 202, 203) being present between all the adjacent pipe layers (100, 101; 101, 102; . . . ) and a plurality of spacers (30) being arranged in each pipe bundle gap (200, 201, 202, 203) to support the pipe layers (100, 101, 102, 103). According to the invention, the spacers (30) each have a thickness (D) in the radial direction (R) of the pipe bundle (15), the thicknesses (D) of the spacers (30) of a first pipe bundle gap (200) each being greater than the thicknesses (D) of the spacers of a second pipe bundle gap (203), which lies further to the outside in the radial direction (R) of the pipe bundle (15) than the first pipe bundle gap (200).

1 .- 12 . (canceled) 
     
     
         13 . A heat exchanger for indirect heat transfer between a first and at least one second medium, having
 a shell space for receiving the first medium,   a core tube arranged in the shell space,   a tube bundle arranged in the shell space that has multiple tubes, each of which is wound around the core tube so that the tube bundle has multiple tube layers which are arranged one above the other and each of which has at least one tube, wherein there is a tube bundle gap between every two adjacent tube layers, wherein several spacers for supporting the tube layers are arranged in each tube bundle gap,   wherein,   the spacers each have a thickness in the radial direction of the tube bundle, wherein the thicknesses of the spacers of a first tube bundle gap are in each case greater than the thicknesses of the spacers of a second tube bundle gap located further outward in the radial direction of the tube bundle than the first tube bundle gap.   
     
     
         14 . The heat exchanger according to  claim 13 , wherein the thicknesses of the spacers which are arranged in the same tube bundle gap are the same. 
     
     
         15 . The heat exchanger according to  claim 13 , wherein the spacers have more than two, in particular three to four, different thicknesses, wherein the thickness of the spacers decreases or remains the same in the radial direction from the core tube to the shell from tube bundle gap to the tube bundle gap. 
     
     
         16 . The heat exchanger according to  claim 13 , wherein the thickness of the spacers decreases in the radial direction from the core tube to the shell from tube bundle gap to tube bundle gap. 
     
     
         17 . The heat exchanger according to  claim 13 , wherein the spacers are designed as longitudinally extending webs, each of which extends in a longitudinal direction. 
     
     
         18 . The heat exchanger according to  claim 17 , wherein the longitudinal direction of the respective spacer runs parallel to the core tube. 
     
     
         19 . The heat exchanger according to  claim 13 , wherein the respective spacer extends along the core tube, at least over an entire length of the tube bundle. 
     
     
         20 . The heat exchanger according to  claim 13 , wherein the spacers are arranged equidistantly to one another in the respective tube bundle gap in the circumferential direction of the tube bundle. 
     
     
         21 . The heat exchanger according to  claim 13 , wherein between an innermost tube layer in the radial direction of the tube bundle and an outer side of the core tube, there is an innermost tube bundle gap in which a plurality of spacers are arranged. 
     
     
         22 . The heat exchanger according to  claim 13 , wherein the spacers are grouped in such a way that a plurality of spacers for supporting the tube layers are arranged one above the other in a radial direction of the tube bundle. 
     
     
         23 . The heat exchanger according to  claim 13 , wherein the number of spacers in the respective tube bundle gap is the same. 
     
     
         24 . The heat exchanger according to  claim 13 , wherein the number of spacers differs in at least two tube bundle gaps.