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Electrical power
10000
8000
6000
4000
2000
0
0
0.5
1
1.5
2
2.5
x 10
5
Time [s]
Fig. 83 Total consumed electrical power in summer regime, model 5
Battery voltage
50
V
ref
49
48
47
46
45
44
0
0.5
1
1.5
2
2.5
x 10
5
Time [s]
Fig. 84 Battery voltage evolution in summer regime, model 5
Analyzing the operating regime of the thermal subsystem, it can be noticed
that
there is only one source (the Stirling engine) and a single
load (the domestic water circuit). The temperature evolution of the thermal agent
inside the accumulation tank is presented in Fig.
85
. In the initial period of the
dynamic regime, the thermal and electrical powers of the Stirling engine are null
and the thermal energy consumption in the domestic water circuit is achieved from
the energy saved in the accumulation tank. Figure
85
shows that in the initial
period,
-
in summer regime
-
the temperature decreases signi
cantly. In the following,
the energetic
consumption in the domestic water circuit is reduced signi
cantly and the voltage
controller sets the Stirling engine power at a maximum value, so that the thermal
energy produced is in excess. This situation involves the use of an energy dissi-
pater. Figure
86
presents the evolution of the dissipated power.
Overall, the results obtained through numerical simulation does not validate the
proposed solution, because the power produced in the electrical subsystem is not
suf
cient, meaning that a permanent regime cannot be achieved in the evolution of
the battery voltage. In addition, the produced electrical energy is insuf
cient in
summer regime, but the produced thermal energy is in excess, which imposes the
use of a thermal energy dissipater.
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