Civil Engineering Reference
In-Depth Information
Table 33 Load sharing of the mCCHP system with mechanical compression chiller
Month
System load
PV and ST panels load
CHP unit load
Boiler
load
e
sys
(kWh/m
2
)
q
sys
(kWh/m
2
)
e
PV
(kWh/m
2
)
q
TP
(kWh/m
2
)
e
cg
(kWh/m
2
)
q
cg
(kWh/m
2
)
q
ad
(kWh/m
2
)
January
3.33
15.94
1.24
4.14
2.09
6.27
5.52
February
3.33
13.77
1.76
5.88
1.57
4.71
3.19
March
3.33
10.94
2.91
9.69
0.42
1.27
0.00
April
3.47
6.23
3.47
6.23
0.00
0.00
0.00
May
4.23
2.21
4.23
2.21
0.00
0.00
0.00
June
4.62
1.25
4.62
1.25
0.00
0.00
0.00
July
4.89
1.25
4.89
1.25
0.00
0.00
0.00
August
4.89
1.25
4.86
1.16
0.03
0.09
0.00
September
4.34
1.39
3.59
0
0.75
1.39
0.00
October
3.56
5.94
2.51
7.7
1.05
3.15
0.00
November
3.33
10.63
1.34
4.47
1.99
5.97
0.18
December
3.33
14.21
1.01
3.35
2.33
6.98
3.87
Total
46.67
85.00
39.31
130.98
10.23
30.68
12.77
e
cg
c
q
cg
¼
ð
60
Þ
To determine the heat produced by the boiler, q
ad
, we will use the heat balance
equation for the stationary regime at heat storage level and result:
q
ad
¼ q
sys
q
cg
q
ST
ð
61
Þ
0. The required energy is provided
by thermal solar panels, q
ST
, and cogeneration unit, while the excess is stored in the
heat storage.
Using data from Table
31
for monthly energy speci
The additional boiler does not operate if q
ad
≤
c consumption of the
mCCHP system in the case of cooling with mechanical compression chillers and
from Table
6
for monthly speci
c power and heat production of the panels and
building we can determine the load sharing of the CHP and backup boiler. The
results of the load sharing of the mCCHP system with mechanical compression
chiller are shown in Table
33
.
Similar, using data from Table
32
and from Table
6
results the load sharing of
the mCCHP system with thermally compression chiller, which are shown in
Table
34
.
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