IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

IEA SHC Task 38 Solar Air Conditioning and Refrigeration
Subtask A Report, Date:…
4 Experience report summer 2010
The following section contains monitoring results of the MA34 solar cooling system for
August and September 2010 with a focus on the variable speed control mode of the heat
rejection fans.
The monitoring evaluation of August showed that the heat rejection operated permanently,
even when the rest of the plant wasn´t in operation (see Figure 9). That was caused by an
error set at the adsorption chiller control panel, which was “manual” instead of “automatic”.
This error was corrected at the 14 th of August 2010; the resulting decrease of electricity
demand is shown in Figure 9. Furthermore, the COP el increases significantly from that date
on (see Figure 10) although the heat rejection is operating with maximum capacity (ca.
650 W).
25,00
35,00
20,00
30,00
25,00
]
h
fans heat rejection
W15,00
[k
20,00 ] control
h
n
W pump cold storage
tio
[k
p
y pump heat rejection
m
u
rg
s
15,00 e
n10,00
n
pump desorption
e
o
c
g pump fan coil
ity
lin
o pump solar secondary loop
10,00
tric
C pump solar primary loop
c
le
cooling energy
E 5,00
5,00
0,00
0
1
0
.2
8
.0
1
0
0
1
0
.2
8
.0
2
0
0
1
0
.2
8
.0
4
0
0
1
0
.2
8
.0
5
0
0
1
0
.2
8
.0
8
0
0
1
0
.2
8
.0
9
0
0
1
0
.2
8
.0
0
1
0
1
0
.2
8
.0
1
0
1
0
.2
8
.0
2
1
0
1
0
.2
8
.0
3
1
0
1
0
.2
8
.0
4
1
0
1
0
.2
8
.0
5
1
0
1
0
.2
8
.0
8
1
0
1
0
.2
8
.0
9
1
0
1
0
.2
8
.0
3
2
0
1
0
.2
8
.0
5
2
0
1
0
.2
8
.0
6
2
0
1
0
.2
8
.0
9
2
0,00