Page 11 - Vol.36-No.9 issue
P. 11

REFRIGERATION & COLD STORAGE

               NEW MICRO PLATE HEAT EXCHANGERS GIVE DANFOSS A


        “COMPREHENSIVE PORTFOLIO” FOR CHILLERS AND HEAT PUMPS


         Each new model is designed         ants including  propane,  making  their
         to solve a particular system       refrigerant  charge-reducing  properties
                                            especially valuable.
               design challenge:              Like all Danfoss Micro Plate Heat Ex-
          The new, R32-optimized range com-  changers  (MPHEs),  the  new  ranges  are
        plements   existing   multi-refrigerant   built  around  the  proven Z-design  con-
        heat exchangers for R410A, R452B, and   cept, which since 2016 has helped OEMs
        R454B,  widening  chiller  manufacturers’   worldwide  to  improve  efficiency,  mini-
        options when reducing GWP.          mize  weight,  and reduce  the  refriger-
          New  single  and  dual-circuit  ver-  ant charge, thanks to its high heat trans-
                                            fer coefficient.
        sions are available to complete the ex-
        isting  range  for  chillers.  The  portfolio   All  the  heat  exchangers  can  be cus-  strong ambition to be manufacturers’ go-
        can now cover the entire range of light   tomized, matching the number of plates   to choice for heat exchangers in chillers
        commercial  and  commercial  chiller   and  connection  sizes  to  the  individual   and  heat  pumps  alike  and  demon-
        ranges.                             system  requirements—and  combined   strates intensification  of  our  R&D  in-
                                            with Danfoss expansion valves, they can
          HDW44 is perfect for sanitary water   all achieve stable outlet superheat also   vestment.
        heating, with a double-wall and a built-  below 3K.                      “For the past four years, Z-design has
        in interspace preventing water contami-                                 changed the game for heat exchange ef-
                                              Danfoss  is  today  the  only  supplier
        nation in the event of a refrigerant leak.  that  can  offer  such  a  comprehensive   ficiency in condensers and evaporators.
          The  Suction  Gas  Heat  Exchang-  MPHE  and  Micro  Channel  Heat  Ex-  It means you can improve your system’s
        er  (SGHX) can  enhance  efficiency  in   changers (MCHE) portfolio combined   capacity,  or  achieve  the same  perfor-
        heat  pump  condensers  and  evapora-  with  comprehensive  compressors,   mance with a smaller size.”
        tors,  counteracting  the  impact  of  high-  valves, line components, and techni-  “The message is clear: whatever sys-
        glide refrigerant blends like R455A and   cal assistance for OEMs.      tem  you’re  designing—and  whichever
        R454C.                                Olivier Pelletier, Danfoss Head of Busi-  refrigerant you’re working with—talk to
          The  whole  portfolio  for  heat  pumps   ness  Development  for  BPHE,  explains:   Danfoss. You’ll find a one-stop-shop with
        is  qualified  for flammable  refriger-  “These  new  products  underline  our   a  heat  exchanger  to  meet  your  needs,
                                                                                and technical support to match.
                                                                                                    Circle 11 on enquiry card
          M EQUALS OPTIMUM WITH THE NEW BRAZED PLATE CORRUGATION


                   KELVIN’S LARGEST, BRAZED HEAT EXCHANGER GB 1000M


          Refrigeration,  air  conditioning  tech-  therefore suited to applications in build-
        nology, heat pumps, and hot water sys-  ing  services,  efficient  data  center  air
        tems are set to benefit from Kelvion’s new   conditioning, or refrigeration systems.
        plate  corrugation  for  its  largest  Brazed   The M-corrugation makes it possible,
        Plate  Heat  Exchanger  series,  GB  1000.   for  example,  to  increase  the  yield  of
        Called the M-corrugation, which stands   solar  thermal  systems  during  seasonal
        for medium, it fits between the H version   changes, without requiring a high pump
        for maximum specific performance and   capacity. The  plate  corrugation  also  al-
        the L version for low-pressure losses.  lows  the  resource-saving  operation  of
           The GB 1000M Brazed Heat Exchang-  heat  pumps  or  refrigeration  systems
        ers for the application range from -196 to   with  small  temperature  differences  be-
        +200 °C and, depending on the design   tween the media or optimizes the trans-
        – for pressures up to 45 bar        fer  of  heat  in  low-temperature  heating   For  this  purpose,  the  nozzles  are
          But  medium  doesn’t  mean  anything   systems.                       brazed both on the connection plate and
        less than top performance. The new plate   With their large connections, heat ex-  on the first heat exchanger plate, so they
        is the ideal compromise for many appli-  changers  in  the  GB  1000M  series  offer   are soldered twice. The Safety Chamber
        cations:  the  M  corrugation  produces  a   the  possibility  of  handling  large  vol-  takes the misery out of high-temperature
        large “thermal length”, so that upcoming   ume flows of up to 150 m3/h in order to   fluctuations  by  absorbing  thermally-in-
        heat quantities can be transferred even   achieve  maximum  heat  transfer  values.   duced  stresses,  thus  reducing  the  me-
        at the slightest temperature differences.   Additional features of the GB 1000M heat   chanical load on the connections and the
        However, it causes lower pressure losses   exchangers are the proven high leakage   heat  exchanger.  Equipped  in  this  way,
        than the H version.                 safety, thanks to the 100% pressure test   the GB 1000M Brazed Heat Exchangers
                                                                                are  suitable  for  applications  ranging
          On the other hand, Brazed Plate Heat   check as well as a gas leak test at the end   from -196 to +200 °C and, depending on
        Exchangers  with  M-corrugation  are   of the manufacturing process. A double   the design, for pressures up to 45 bar.
        more powerful than the same size as L-   sealing  provides  tightness  in  the  con-
        corrugation.  The  Kelvion  GB  1000M  is   nection area:                                   Circle 12 on enquiry card

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