Heat exchanger element and method for manufacturing same

Abstract

A heat exchanger element for being in contact with a gas includes a solid surface coated with a layer of a predetermined material. The layer is configured to enhance the heat transfer between the solid surface and the gas by thermo-acoustic impedance matching.

1 . A heat exchanger element for being in contact with a gas, the heat exchanger element comprising:
 a solid surface coated with a layer of a predetermined material, the layer being configured to enhance the heat transfer between the solid surface and the gas by thermo-acoustic impedance matching.   
     
     
         2 . The heat exchanger element according to  claim 1 , wherein the predetermined material is a material with values of thermo-acoustic impedance between the values of the heat exchanger element and the gas. 
     
     
         3 . The heat exchanger element according to  claim 1 , wherein the layer has a thickness in a range between 1 μm to 100 μm. 
     
     
         4 . The heat exchanger element according to  claim 1 , wherein the solid surface has a flat section or at least one section with a predetermined structuring and/or topology or a combination of both. 
     
     
         5 . The heat exchanger element according to  claim 1 , wherein the solid surface has a section which has a tubular shape with an outer surface and/or an inner surface and/or a cylindrical shape with an outer surface and/or an inner surface. 
     
     
         6 . A method for coating a heat exchanger element being in contact with a gas, wherein the heat exchanger element comprises a solid surface, the method comprising:
 coating the solid surface with a layer of a predetermined material, wherein the layer is configured to enhance the heat transfer between the solid surface and the gas by thermo-acoustic impedance matching.   
     
     
         7 . The method according to  claim 6 , wherein the predetermined material is a non-crystalline material having intermediate values of thermo-acoustic impedance. 
     
     
         8 . The method according to  claim 6 , wherein coating the solid surface with the layer is performed by slot-die coating, doctor blading, dip coating, spray painting or by lamination of films. 
     
     
         9 . The method according to  claim 6 , wherein the solid surface is coated by several layers of different predetermined materials and/or having different thicknesses. 
     
     
         10 . The method according to  claim 7 , wherein the non-crystalline material is a non-metallic amorphous material.