Ammonia-water absorption refrigeration unit

Abstract

An ammonia water absorption chiller unit for drive temperatures of also less than 100° C. with at least one absorber arranged in a refrigerant cycle, wherein the absorber includes a fully welded packet of plates for an inner medium which is in turn placed in a casing for an outer medium. A method of minimum complexity for leading media in at least one refrigerant cycle of the ammonia water absorption chiller unit using heat exchangers which include a fully welded packet of plates for an inner medium which is in turn arranged in a casing for an outer medium. A use of an absorber which includes a fully welded packet of plates for an inner medium which is in turn arranged in a casing for an outer medium in a refrigerant cycle of the ammonia water absorption chiller unit.

1 . An ammonia water absorption chiller unit comprising at least one absorber arranged in a refrigerant cycle, characterized in that the absorber comprises a fully welded packet of plates for an inner medium which is in turn placed in a casing for an outer medium. 
     
     
         2 . The ammonia water absorption chiller unit according to  claim 1 , characterized by an evaporator arranged in the refrigerant cycle, comprising a fully welded packet of plates for an inner medium which is in turn placed in a casing for an outer medium. 
     
     
         3 . The ammonia water absorption chiller unit according to  claim 2 , characterized in that the absorber is arranged after the evaporator in the refrigerant flow direction. 
     
     
         4 . The ammonia water absorption chiller unit according to  claim 1 , characterized by a desorber arranged in the refrigerant cycle, comprising a fully welded packet of plates for an inner medium which is in turn placed in a casing for an outer medium. 
     
     
         5 . The ammonia water absorption chiller unit according to  claim 4 , characterized in that the desorber is arranged after the absorber in the refrigerant flow direction. 
     
     
         6 . The ammonia water absorption chiller unit according to  claim 1 , characterized by a condenser arranged in the refrigerant cycle, comprising a fully welded packet of plates for an inner medium which is in turn placed in a casing for an outer medium. 
     
     
         7 . The ammonia water absorption chiller unit according to  claim 1 , characterized in that the condenser is arranged before the evaporator in the refrigerant flow direction. 
     
     
         8 . The ammonia water absorption chiller unit according to  claim 1 , characterized by a solution heat exchanger arranged in the refrigerant cycle, comprising a fully welded packet of plates for an inner medium which is in turn placed in a casing for an outer medium. 
     
     
         9 . The ammonia water absorption chiller unit according to  claim 8 , characterized in that the solution heat exchanger is arranged between the absorber and the desorber in the refrigerant flow direction. 
     
     
         10 . The ammonia water absorption chiller unit according to  claim 1 , characterized in that at drive temperatures of more than 100° C. a dephlegmator which is arranged in the refrigerant cycle and comprises a fully welded packet of plates for an inner medium which is in turn placed in a casing for an outer medium is present. 
     
     
         11 . The ammonia water absorption chiller unit according to  claim 10 , characterized in that the dephlegmator is arranged before the condenser in the refrigerant flow direction. 
     
     
         12 . The ammonia water absorption chiller unit according to  claim 10 , characterized in that the dephlegmator is cancelled at drive temperatures of less than 100° C. 
     
     
         13 . The ammonia water absorption chiller unit according to  claim 1 , characterized by a refrigerant supercooling unit arranged in the refrigerant cycle, comprising a fully welded packet of plates for an inner medium which is in turn placed in a casing for an outer medium. 
     
     
         14 . The ammonia water absorption chiller unit according to  claim 13 , characterized in that the refrigerant supercooling unit is cancelled with a cooling capacity of the evaporator of less than 100 kW. 
     
     
         15 . The ammonia water absorption chiller unit according to  claim 13 , characterized in that the refrigerant supercooling unit is arranged between the evaporator and the condenser, on the one hand, and between the evaporator and the absorber, on the other hand, in the refrigerant flow direction. 
     
     
         16 . The ammonia water absorption chiller unit according to  claim 1 , characterized in that the refrigerant cycle comprises at least one refrigerant, preferably ammonia. 
     
     
         17 . The ammonia water absorption chiller unit according to  claim 1 , characterized in that the refrigerant cycle comprises at least one solvent, preferably water. 
     
     
         18 . The ammonia water absorption chiller unit according to  claim 1 , characterized in that the feeding pipes and/or draining pipes to the condenser and the absorber in the refrigerant flow direction contain pressure compensation pipes. 
     
     
         19 . A method of minimum complexity for leading media in at least one refrigerant cycle of an ammonia water absorption chiller unit, preferably an ammonia water absorption chiller unit according to  claim 1 , using heat exchangers which comprise a fully welded packet of plates for an inner medium which is in turn arranged in a casing for an outer medium. 
     
     
         20 . The method according to  claim 19 , characterized in that for leading the media the plate geometry of the heat exchangers is adapted to turbulent flow conditions for a particularly efficient heat and substance transfer. 
     
     
         21 . The method according to  claim 20 , characterized by an adaptation of the plate geometry of the heat exchangers to or for turbulent flow conditions with flow rates comprised between 0.05 m/s and 1 m/s as well as with pressure losses of less than 0.1 MPa. 
     
     
         22 . A use of an absorber which comprises a fully welded packet of plates for an inner medium which is in turn arranged in a casing for an outer medium, in a refrigerant cycle of an ammonia water absorption chiller unit, preferably an ammonia water absorption chiller unit preferably using a method according to  claim 19 .