Christoph's powerpoint presentation - Evaluation of the thermal

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Christoph's powerpoint presentation - Evaluation of the thermal Powered By Docstoc
					         Evaluation
of the thermal performance
 of the Waalitj building in
           Winter

              Christoph Anders
  Environmental Technology Centre – Murdoch
                  University
                         Contents
• Technique of the Solar Air Heating (SAH)
  & Floor Heating System (FHS)
• Findings concerning the BMS
• Measured Performance
     room temperature
     SAH & FHS
• Conclusions

10th of September 2003   Christoph Anders - ETC   2
  The Solar Air Heating Principle
                                                       SAH inlet
                                                       damper
                                                       (motorised)
               Photovoltaic                               SAH fan
               (PV) panels
                                                          ceiling vent




         Roof duct
            and
          plenum

                                                                     south
                                                                     facing
              N                vent
                                                                     glazing




10th of September 2003        Christoph Anders - ETC                           3
        The PCM floor heating cell


                                                                   35 mm
         Concrete
                     TH29 Underfloor Heating System

         Thermal
                                                                   50 mm
         Bank
         (TH29)

          Electric
          heating
          cable
                                                                   15 mm

                                                      Insulation




10th of September 2003                   Christoph Anders - ETC            4
                The „Concrete only‟ cell

                                                                   Electric heating
                                                                   cable

                                                                   25 mm
     Concrete
                  TH29 Underfloor Heating System


                                                                   60 mm
     Insulation




                                                                   15 mm




10th of September 2003                    Christoph Anders - ETC                      5
 The Building Management System
• The „Time Error‟

• Slight Changes within the controlling
  Algorithms (SAH & FHS)

• The metered room temperature


10th of September 2003   Christoph Anders - ETC   6
                         The „Time Error‟
• The Time in time settings for the control
  algorithms, e.g. „day‟, is 1 hour wrong.
• To set a “Day” timeframe from 9am to
  5pm → insert: 10am - 6pm
• Time in data measurement is right




10th of September 2003       Christoph Anders - ETC   7
                  Room Temperature
       13.8.03   Time    RT – BMS [deg C]    RT – thermometer [deg C]
                 10:14         15.65                   17.0
                 11:24         17.48                   18.0
                 12:14         17.92                   18.5
                  2:24         18.89                   19.5
                  3:14         18.89                   19.5
       14.8.03   Time
                  9:54         15.02                   17.0
                 10:54         16.89                   18.0
                 12:14         18.66                   19.0
                  1:24         19.53                   19.5
                  3:04         20.06                   20.0
                  3:54          20.2                   20.0
                  5:44         19.27                   19.5



10th of September 2003   Christoph Anders - ETC                         8
               Thermal Performance
                                                                                          Room Air Temperature 17.7 - 24.7.03




                                       23




                                       19
               Temperature in deg C




                                       15




                                       11




                                        7




                                        3
                                      17/07 0:00          18/07 0:00   19/07 0:00         20/07 0:00          21/07 0:00           22/07 0:00           23/07 0:00   24/07 0:00     25/07 0:00
                                                                                                              date + time
                                                   room temperature          lower limit of thermal comfort                 upper limit of thermal comfort           OAT from BMS




10th of September 2003                                                           Christoph Anders - ETC                                                                                          9
      The Floor Heating System 1
                                                                                     floor heating performance 16.08.03

                                   32


                                   30


                                   28


                                   26
         temperature in degree C




                                   24


                                   22


                                   20


                                   18


                                   16


                                   14


                                   12
                                    18:00       20:00   22:00        0:00     2:00      4:00     6:00       8:00    10:00     12:00      14:00    16:00      18:00      20:00
                                                                                                  date + time
                                        Concrete 1      Concrete 2          PCM 1        PCM 2          room temp      outside temperature       FHS Start           FHS Stop




10th of September 2003                                                               Christoph Anders - ETC                                                                     10
      The Floor Heating System 2
                                                                                    floor heating performance 22.08.03

                                  33


                                  30


                                  27


                                  24
        temperature in degree C




                                  21


                                  18


                                  15


                                  12


                                  9


                                  6
                                  18:00        20:00   22:00        0:00     2:00      4:00     6:00       8:00    10:00     12:00      14:00    16:00      18:00      20:00
                                                                                                 date + time
                                       Concrete 1      Concrete 2          PCM 1        PCM 2          room temp      outside temperature       FHS Start           FHS Stop




10th of September 2003                                                              Christoph Anders - ETC                                                                     11
                                               Solar Air Heating 1
                                                                                             SAH Performance 30.07.03
                                     24                                                                                                                                              1.33




                                     22                                                                                                                                              1.00
             temperatures in deg C




                                     20                                                                                                                                              0.67




                                     18                                                                                                                                              0.33




                                     16                                                                                                                                              0.00




                                     14                                                                                                                                              -0.33
                                     8:30:00   9:30:00            10:30:00    11:30:00          12:30:00          13:30:00       14:30:00        15:30:00    16:30:00          17:30:00
                                                                                                           time
                                               room temperature              outside temp.                 setpoint III = stop          lower limit of TCR        SAH on/off




10th of September 2003                                                           Christoph Anders - ETC                                                                                      12
                                                      Energy in kWh




                                                                 12
                                                                      16
                                                                           20




                                              0
                                                  4
                                                      8
                                 1/
                                    07
                                      /2
                                        00
                                          3
                                 2/
                                    07
                                      /2
                                        00
                                          3




10th of September 2003
                                 3/
                                    07
                                      /2
                                        00
                                          3
                                 4/
                                    07
                                      /2
                                        00
                                          3
                                 5/
                                    07
                                      /2
                                        00
                                          3
                                 6/
                                    07
                                      /2
                                        00
                                          3
                                 7/
                                    07
                                      /2
                                        00
                                          3
                                 8/
                                    07
                                      /2




                         Date
                                        00
                                          3
                                 9/
                                    07
                                      /2
                                        00
                                          3
                                                                                Provided Heat Energy 1. - 14.07.03




Christoph Anders - ETC
                                10
                                   /0
                                     7/
                                       20
                                         03
                                11
                                   /0
                                     7/
                                       20
                                         03
                                12
                                   /0
                                     7/
                                       20
                                         03
                                                                                                                     Solar Air Heating 2




                                13
                                   /0
                                     7/
                                       20
                                         03
                                14
                                   /0
                                     7/
                                       20
                                         03
13
                         Conclusions
• FHS not capable to provide thermal
  comfort on the coldest days on its own
• Discomfort at beginning of working day
• SAH powerful, but varying availability
• Heat Losses during the night




10th of September 2003     Christoph Anders - ETC   14
                   Recommendations
Heat Losses:
• Blinds to reduce heat loss through
  windows
• Other wall material – insulation

Heating:
• Possibly heating within occupation period

10th of September 2003   Christoph Anders - ETC   15

				
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