Constant vapor velocity condenser

Abstract

A condensing heat exchanger to exchange heat from a hot flow to a cold flow includes a hot flow side to receive the hot flow, the hot flow side including a hot flow inlet disposed on a hot flow inlet side and a hot flow outlet disposed on a hot flow outlet side, wherein a hot flow side cross section decreases from the hot flow inlet side to the hot flow outlet side, a cold flow side to receive the cold flow, and an interface disposed between the hot flow side and the cold flow side to allow thermal communication therebetween.

What is claimed is: 
     
         1 . A condensing heat exchanger to exchange heat from a hot flow to a cold flow, the condensing heat exchanger comprising:
 a hot flow side to receive the hot flow, the hot flow side including a hot flow inlet disposed on a hot flow inlet side and a hot flow outlet disposed on a hot flow outlet side, wherein a hot flow side cross section decreases from the hot flow inlet side to the hot flow outlet side;   a cold flow side to receive the cold flow; and   an interface disposed between the hot flow side and the cold flow side to allow thermal communication therebetween.   
     
     
         2 . The condensing heat exchanger of  claim 1 , the cold flow side including a cold flow inlet disposed on a cold flow inlet side and a cold flow outlet disposed on a cold flow outlet side. 
     
     
         3 . The condensing heat exchanger of  claim 2 , wherein a cold flow side cross section decreases from the cold flow inlet side to the cold flow outlet side. 
     
     
         4 . The condensing heat exchanger of  claim 1 , wherein the hot flow side includes a plurality of hot flow fins. 
     
     
         5 . The condensing heat exchanger of  claim 4 , wherein a cross section of each of the plurality of hot flow fins decreases from the hot flow inlet side to the hot flow outlet side. 
     
     
         6 . The condensing heat exchanger of  claim 1 , wherein the cold flow side includes a plurality of hot flow fins. 
     
     
         7 . The condensing heat exchanger of  claim 6 , wherein a cross section of each of the plurality of cold flow fins decreases from the cold flow inlet side to the cold flow outlet side. 
     
     
         8 . The condensing heat exchanger of  claim 1 , wherein the hot flow side provides counter-flow to the cold flow side. 
     
     
         9 . The condensing heat exchanger of  claim 1 , wherein the hot flow side provides cross-flow to the cold flow side. 
     
     
         10 . The condensing heat exchanger of  claim 1 , wherein the hot flow side provides a constant vapor velocity within the hot flow. 
     
     
         11 . The condensing heat exchanger of  claim 1 , wherein the condensing heat exchanger is a line replaceable unit. 
     
     
         12 . The condensing heat exchanger of  claim 1 , wherein the condensing heat exchanger is made via additive manufacturing. 
     
     
         13 . The condensing heat exchanger of  claim 1 , wherein the condensing heat exchanger is made by vacuum brazing.