Heat-exchanger plate

Abstract

A plate element (1) for a heat exchanger is designed as an at least two-layered laminate assembly (1). Said laminate assembly (1) includes a membrane layer (2) which allows enthalpy between two fluid flows separated by the plate element (1) to be transferred, and at least one support layer (3, 4) which is made of a broken-through, deformable material and which allows the plate element (1) to be provided with a given mechanical rigidity and three-dimensional structure and maintain said rigidity and structure.

1 . A plate for a plate-type heat exchanger wherein the plate is an at least two-layer laminate comprising:
 a membrane layer by means of which enthalpy can be transferred between two fluid streams separated by the plate and   at least one support layer that consists of a broken-through and deformable material by means of which the plate can be provided with a predetermined mechanical strength and a three-dimensional and self-supporting structure.   
     
     
         2 . The plate according to  claim 1 , wherein the membrane layer is a plastic membrane layer. 
     
     
         3 . The plate according to  claim 1 , wherein the at least one support layer is a woven fabric or nonwoven layer. 
     
     
         4 . The plate according to  claim 1 , wherein the at least one support layer is formed from a thermally deformable material. 
     
     
         5 . The plate according to  claim 1 , wherein the laminate is a three-layer laminate having a further support layer that is on a side of the membrane layer facing away from the first support layer and by means of which the plate can be provided with a predetermined mechanical strength and a three-dimensional and self-supporting structure. 
     
     
         6 . The plate according to  claim 1 , wherein a flat, point-by-point, strip or grid-shaped connection of each support layer to the membrane layer can be achieved by material properties of each support layer or membrane layer. 
     
     
         7 . The plate according to  claim 1 , wherein a flat, point-by-point, strip or grid-shaped connection of each support layer to the membrane layer can be achieved by a binder. 
     
     
         8 . The plate according to  claim 3 , wherein each nonwoven layer is formed from a polyester nonwoven. 
     
     
         9 . The plate according to  claim 8 , wherein the polyester nonwoven has a weight between 20 and 80 g/m 2 . 
     
     
         10 . The plate according to  claim 8 , wherein the polyester nonwoven is hygroscopically variable. 
     
     
         11 . The plate according to  claim 10 , wherein the polyester nonwoven has a coating made of a zeolite and a binder for varying hygroscopy thereof. 
     
     
         12 . The plate according to  claim 2 , wherein the plastic membrane layer is formed from a polyurethane or a polymer. 
     
     
         13 . The plate according to  claim 1 , wherein the plate can be interlocked and welded or adhesively bonded at its edges and can thus be joined together with further plates of the same type to form a plate-type heat exchanger. 
     
     
         14 . A method of making a plate for a plate-type heat exchanger, the method comprising the steps of:
 providing a plastic membrane layer;   laminating at least one support layer in flat form on each face of the plastic membrane layer so as to form a flat laminate; and   deforming the flat laminate into a three-dimensional, load-bearing and self-supporting structure.   
     
     
         15 . The method according to  claim 14 , further comprising the step during the deformation step of:
 making an adhesive connection between each support layer and the membrane layer.   
     
     
         16 . The method according to  claim 14 , wherein the deformation is performed at a temperature of <160° C. 
     
     
         17 . The method according to  claim 14 , wherein each support layer is provided with a coating made of a zeolite and a binder by a dipping or spraying process.