Comfort Control Techniques for the Users of a Room - Comfort Control in Buildings - page 193

Fig. 5.31 Real results for test (C)
Lastly, energy consumption of the hierarchical controller in comparison to the
approach presented in Sect. 5.3 can be observed in Figs. 5.27 , 5.30 , 5.33 and 5.36 .In
addition, in Table 5.4 a brief summary of the results is shown. In this table, it can be
observed that there exists a large difference between energy consumption during the
winter (tests (A) and (B)), and the summer (test (C) and (D)) periods. This difference
is due mainly to the use of the absorption machine which, as was explained in
Chap. 2 , is responsible for producing chilled water for the fancoils. More specifically,
for the winter period, it is shown that for classical MPC, the energy consumption
is around 23kWh while for the efficient hierarchical controller it is approximately
equal to 11kWh, which means an energy saving of about 53%.Nevertheless, in the