Core assembly for a heat exchanger and method of assembling

Abstract

A core assembly for a heat exchanger includes a plurality of parting sheets defining a plurality of fluid passages including a plurality of first fluid passages and a plurality of second fluid passages arranged in an alternating arrangement, wherein each of the plurality of parting sheets comprises a thickness of about 0.016″. Also included is a plurality of first fluid passage fins disposed between the plurality of parting sheets within each of the plurality of first fluid passages. Further included is a plurality of second fluid passage fins disposed between the plurality of parting sheets within each of the plurality of second fluid passages. Yet further included is a plurality of closure bars disposed between respective pairs of the plurality of parting sheets.

1 . A core assembly for a heat exchanger comprising:
 a plurality of parting sheets defining a plurality of fluid passages including a plurality of first fluid passages and a plurality of second fluid passages arranged in an alternating arrangement, wherein each of the plurality of parting sheets comprises a thickness of about 0.016″;   a plurality of first fluid passage fins disposed between the plurality of parting sheets within each of the plurality of first fluid passages;   a plurality of second fluid passage fins disposed between the plurality of parting sheets within each of the plurality of second fluid passages; and   a plurality of closure bars disposed between respective pairs of the plurality of parting sheets.   
     
     
         2 . The core assembly of  claim 1 , wherein each of the plurality of first fluid passage fins comprises a continuous sheet including a ruffled fin geometry and a plurality of alternating peaks extending between corresponding parting sheets. 
     
     
         3 . The core assembly of  claim 2 , wherein the continuous sheet of each of the plurality of first fluid passage fins comprises a fin height of about 0.088″ and fin thickness of about 0.004″. 
     
     
         4 . The core assembly of  claim 2 , wherein the continuous sheet of each of the plurality of first fluid passage fins comprises about 30 fins per inch. 
     
     
         5 . The core assembly of  claim 1 , wherein each of the plurality of second fluid passage fins comprises a continuous sheet including a ruffled fin geometry and a plurality of alternating peaks extending between corresponding parting sheets. 
     
     
         6 . The core assembly of  claim 5 , wherein the continuous sheet of each of the plurality of second fluid passage fins comprises a fin height of about 0.324″ and a fin thickness of about 0.003″. 
     
     
         7 . The core assembly of  claim 5 , wherein the continuous sheet of each of the plurality of second fluid passage fins comprises about 26.5 fins per inch. 
     
     
         8 . The core assembly of  claim 1 , further comprising a plurality of guard fins disposed proximate a leading edge and a trailing edge of the plurality of second fluid passage fins. 
     
     
         9 . The core assembly of  claim 8 , wherein each of the plurality of guard fins comprises a fin height of about 0.324″, a fin thickness of about 0.012″, and a fin length of about 0.250″. 
     
     
         10 . The core assembly of  claim 1 , wherein the plurality of first fluid passages comprises a plurality of liquid passages and the plurality of second fluid passages comprises a plurality of ram air passages. 
     
     
         11 . The core assembly of  claim 10 , wherein the plurality of liquid passages comprises about 22 passages and the plurality of ram air passages comprises about 23 passages. 
     
     
         12 . The core assembly of  claim 1 , wherein the heat exchanger is disposed on an aircraft. 
     
     
         13 . The core assembly of  claim 12 , wherein the heat exchanger is in operative association with a galley refrigeration unit. 
     
     
         14 . A method of assembling a heat exchanger comprising:
 stacking a plurality of first fins having a fin height of about 0.088″, a plurality of second fins having a fin height of about 0.324″, at least one closure bar within a plurality of parting sheets;   applying a brazing material to the plurality of parting sheets; and   heating the core assembly to activate the brazing material and adhere the plurality of fins, the at least one closure bar and the plurality of parting sheets to each other.