Upgrading a District Heating Network with Modern Technologies in

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					                   Upgrading a District Heating Network with Modern Technologies in TOPLIFIKACIJA AD
                                                          SKOPJE




08/12/11   Siemens Building Technologies     Skopje DH
                                                                                1
                            Upgrading a District Heating Network with Modern Technologies in TOPLIFIKACIJA AD
                                                                   SKOPJE
                                                                                              LEGEND

                    GSM                                       Supervision of                  B1 - Sensor QAC22
                    Communication                             control centre                  B2 - Sensor QAE22A
B1                                                                                A1          B3 – DRT Sensor QAE22A
                                                                                              B4 - Sensor QAE22A
                                                    N1                                        B5 – Sensor QAE22A
                                                                                              Y1 – Valve with Actuator VX..+ SQ..
                                                                                              Y2 – Primary valves with/without
                                                                                              spring return and limit switch VV.. + SK..

                                                                             Y1               P1 - Ultrasonic Heat Meter 2WR5....
                                                                                              A1 – Room Unit QAW70
                                                                                              N1 – DH Controller RVD230

                                                         B2
p                                                                                      B4   Heating


               P1            Y2            B5            B3                                 Domestic Hot Water




    08/12/11        Siemens Building Technologies                Skopje DH
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              With DRT limitation, the lowest possible return temperature will be achieved


           DRT = Differential of Return Temperatures
             Maximum limitation of the differential of primary and secondary return
              temperatures (with indirect connections of heat exchangers)

           Mode of operation:                                                         Action:
                                                                                      Volumetric flow
                                                                                      (primary side)          Without DRT limitation
      District heat                                       TVS     T                                           With DRT limitation
      flow                                                                            100 %
                                                           Heat                        90 %
                                                           exchanger                   80 %
      District heat
      return                                                                           70 %
                             M              T   TRP       TRS     T                    60 %
                                                                                       50 %
                                                                                       40 %
                                                          TRP -TRS                     30 %
                                                                                       20 %
                                                                                       10 %
                                                       DRT                              0%

                                                                                       Night setback    Heating operation   Saved water
                                                                                                                            volume
                                            District heating controller




08/12/11    Siemens Building Technologies                                 Skopje DH
                                                                                                              3
                   Upgrading a District Heating Network with Modern Technologies in TOPLIFIKACIJA AD
                                                          SKOPJE

                                                   Pre-controller
                                                  in a link system
                                                   Heating circuit
                                                        D.h.w.
                                                  28 applications
                                                         RVD230

           OZW 111                                                                  TC35T
           Mini M-Bus Unit                                                          GSM Terminal


                                                   Integrated
                                                   interface for
                                                   ...room unit
                                                   ...control centre
                                                   ...heat meter        Antennas
                                                   ...link system



08/12/11   Siemens Building Technologies     Skopje DH
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                           ACS 785 Software for Remote Supervision and Operation

                                                          Substations addresses                                    Alarm viewer




                                                                                                                                                             “ Scheduler “
                                                                  Live Graphical display
                                                                  of substations




                                                                                                                                                                        01e
                                                                                                                                                                    2531O
                                                                                                                      Pop cards
                                                                   5385O01e




                                                                                                                                                                                         5389O01e
                                                                                         5385O02e




                                                                                                                                    “ Job Type Editor”




                                                                                                                                                                                                     02e
                                                                                                                “ Parameter




                                                                                                                                                                                                5389O
                                                                                                                                            03e
                                                                                                                                                                    “ Logfile ”

                                                                                                                                       5385O
                                                                                                                Settings”

“ Trend Viewer “
                                                                              5385O04e




               08/12/11   Siemens Building Technologies                                             Skopje DH




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            Overview System Topology




                                           GSM Communication




08/12/11   Siemens Building Technologies   Skopje DH
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            Versatile Communications



     Integration in a control centre:
     a) via M-bus (central unit OZW)
     b) via telephone gateway (M-bus --> RS232)


              M-bus                                                 M-bus


                                  Electr. limitation
                                  via pulses                                 LPB

                                                                                          Link system;
heat meter                                                                             (Substation, boiler,
                                                         RVD230 and RVD240               ventilation….)
                                                                                               tool
                                                                   PPS

                                                                    Room unit
08/12/11   Siemens Building Technologies               Skopje DH
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