Heat exchanger plate and plate heat exchanger comprising such plates

Abstract

The invention relates a heat exchanger plate ( 1 ) comprising a number of turbulence-promoting protuberances ( 4 ) that project from the plane ( 3 ) of the heat exchanger plate. The protuberances ( 4 ) have a surface profile ( 6 ) for promoting break-up of laminar boundary layers. The invention also relates to a plate heat exchanger comprising such heat exchanger plates ( 1 ).

1 . A heat exchanger plate ( 1 ) comprising a number of turbulence-promoting protuberances ( 4 ) which project from the plane ( 3 ) of the heat exchanger plate, characterised in that 
 the protuberances ( 4 ) have a surface profile ( 6 ) for promoting break-up of laminar boundary layers, and    the surface profile ( 6 ) consists of spherical or ellipsoid segments.    
   
   
       2 . A heat exchanger plate ( 1 ) as claimed in  claim 1 , which together with a plurality of identical heat exchanger plates ( 1 ) is stackable in such a manner that the protuberances ( 4 ) in a first heat exchanger plate ( 1 ) are partially accommodated in the protuberances ( 4 ) in a second heat exchanger plate ( 1 ).  
   
   
       3 . A heat exchanger plate ( 1 ) as claimed in  claim 1 , in which the protuberances ( 4 ) are symmetrically arranged.  
   
   
       4 . A heat exchanger plate ( 1 ) as claimed in  claim 1 , in which the surface profile ( 6 ) has a profile depth that is considerably smaller than the depth of the protuberances ( 4 ).  
   
   
       5 . A heat exchanger plate ( 1 ) as claimed in  claim 1 , in which the surface profile ( 6 ) is concavely or convexly arranged relative to the protuberances ( 4 ).  
   
   
       6 . A heat exchanger plate ( 1 ) as claimed in  claim 1 , in which the geometric transition between the plane ( 3 ) of the heat exchanger plate ( 1 ) and the protuberances ( 4 ) is provided with a radius.  
   
   
       7 . A heat exchanger plate ( 1 ) as claimed in  claim 1 , in which the surface profile ( 6 ) together with the protuberances ( 4 ) forms a golf-ball-like structure.  
   
   
       8 . A plate heat exchanger comprising heat exchanger plates ( 1 ) with turbulence-promoting protuberances ( 4 ) which are arranged in each heat exchanger plate ( 1 ), characterised in that 
 each protuberance ( 4 ) has a surface profile ( 6 ) for promoting break-up of laminar boundary layers, said surface profile ( 6 ) consisting of spherical or ellipsoid segments.    
   
   
       9 . A plate heat exchanger as claimed in  claim 8 , in which the heat exchanger plates ( 1 ) are arranged so that the protuberances ( 4 ) in a first heat exchanger plate ( 1 ) in connection with stacking are partially accommodated in the protuberances ( 4 ) in a second heat exchanger plate ( 1 ).  
   
   
       10 . A plate heat exchanger as claimed in  claim 8 , in which the heat exchanger plates ( 1 ) are arranged in pairs with a first ( 10 ) pair of plates and a second ( 10 ′) pair of plates adjoining the first, in which pairs of plates ( 10 ,  10 ′) a first ( 1 A) and a second ( 1 B) plate are arranged with the protuberances ( 4 ) directed away from each other and in which pairs of plates a gap is arranged between the first ( 1 A) and the second ( 1 B) plate.  
   
   
       11 . A plate heat exchanger as claimed in  claim 8 , in which the protuberances ( 4 ) in each heat exchanger plate ( 1 ) are symmetrically arranged.  
   
   
       12 . A plate heat exchanger as claimed in  claim 8 , in which the surface profile ( 6 ) has a profile depth which is considerably smaller than the depth of the protuberances ( 4 ).  
   
   
       13 . A plate heat exchanger as claimed in  claim 8 , in which the surface profile ( 6 ) of each protuberance ( 4 ) is concavely or convexly arranged relative to the protuberance ( 4 ).  
   
   
       14 . A plate heat exchanger as claimed in  claim 8 , in which the protuberances ( 4 ) together with the surface profile ( 6 ) form a golf-ball-like structure.