Heat exchanger for exchanging heat of fluids having different temperatures

Abstract

A heat exchanger for exchanging heat of fluids having different temperatures, comprising: at least one smooth heat exchanging plate; at least one high temperature heat exchanging plate; and at least one low temperature heat exchanging plate stacked in an alternating sequence, wherein an inlet of high temperature fluid and an outlet of high temperature fluid are disposed in order to pass a high temperature fluid through each said high temperature heat exchanging plate, and an inlet of low temperature fluid and an outlet of low temperature fluid are disposed in order to pass a low temperature fluid through each said low temperature heat exchanging plate, wherein said high temperature heat exchanging plate and said low temperature the heat exchanging plate comprising a high temperature channel and a low temperature channel, wherein said channels have a length extending in a flow direction of said fluids and a side wall of each said channel has a symmetric wavy pattern with the center line of said channel.

1 . A heat exchanger for exchanging heat of fluids having different temperatures comprising: at least one flat heat exchanging plate ( 12 ); at least one high temperature heat exchanging plate ( 14 ); and at least one low temperature heat exchanging plate ( 16 ) stacked in an alternating sequence, wherein an inlet of high temperature fluid ( 18   a ) and an outlet of high temperature fluid ( 20   a ) are disposed in order to pass a high temperature fluid through each said high temperature heat exchanging plate ( 14 ), and an inlet of low temperature fluid ( 18   b ) and an outlet of low temperature fluid ( 20   b ) are disposed in order to pass a low temperature fluid through each said low temperature heat exchanging plate ( 16 ); characterized in that said high temperature heat exchanging plate ( 14 ) comprising a high temperature channel ( 15 ) and said low temperature heat exchanging plate ( 16 ) comprising a low temperature channel ( 17 ), wherein said channels have a length extending in a flow direction of said fluids and a side wall of each said channel has a symmetric wavy pattern with a center line of said channel as a symmetric axis. 
     
     
         2 . The heat exchanger according to  claim 1 , wherein the high temperature channel ( 15 ) and the low temperature channel ( 17 ) have an average width (y) in a range of 100 to 5,000 μm and a curve length (x) and a curve radius (r) according to
   x≤2r,
 
 wherein x is in a range of 100 to 100,000 μm. 
 
     
     
         3 . The heat exchanger according to  claim 1 , wherein the high temperature channel ( 15 ) and the low temperature channel ( 17 ) have an average width (y) in the range of 100 to 3,000 μm, a curve length (x) in the range of 1,000 to 3,000 μm, and a curve radius (r) in the range of 2,000 to 5,000 μm. 
     
     
         4 . The heat exchanger according to  claim 1 , wherein the high temperature channel ( 15 ) and the low temperature channel ( 17 ) have a depth in a range of 10 to 2,000 μm according to a plane defined by the top of each high temperature heat exchanging plate ( 14 ) and each low temperature heat exchanging plate ( 16 ). 
     
     
         5 . The heat exchanger according to  claim 4 , wherein the high temperature channel ( 15 ) and the low temperature channel ( 17 ) have the depth in a range of 500 to 1,500 μm according to the plane defined by the top of each high temperature heat exchanging plate ( 14 ) and each low temperature heat exchanging plate ( 16 ). 
     
     
         6 . The heat exchanger according to  claim 4 , wherein the high temperature heat exchanging plate ( 14 ) and the low temperature heat exchanging plate ( 16 ) are arranged in a direction such that the high temperature channel ( 15 ) and the low temperature channel ( 17 ) are oriented in alternate configuration. 
     
     
         7 . The heat exchanger according to  claim 1 , wherein the flat heat exchanging plate ( 12 ), the high temperature heat exchanging plate ( 14 ), and the low temperature heat exchanging plate ( 16 ) have a thickness in a range of 10 to 10,000 μm. 
     
     
         8 . The heat exchanger according to  claim 7 , wherein the flat heat exchanging plate ( 12 ), the high temperature heat exchanging plate ( 14 ), and the low temperature heat exchanging plate ( 16 ) have the thickness in the range of 100 to 2,000 μm. 
     
     
         9 . The heat exchanger according to  claim 1 , wherein the inlet of high temperature fluid ( 18   a ) and the inlet of low temperature fluid ( 18   b ) are disposed in the opposite side of the heat exchanger in order to form counter-flow of fluids having different temperatures. 
     
     
         10 . The heat exchanger according to  claim 1 , wherein said fluids have a temperature difference at least 1° C. 
     
     
         11 . The heat exchanger according to  claim 10 , wherein said fluids have the temperature difference at least 10° C.