Environmental Engineering Reference
In-Depth Information
3.0
1.0
0.9
2.5
0.8
Cooling power
0.7
2.0
0.6
1.5
0.5
C
O
P
0.4
1.0
0.3
0.2
0.5
0.1
0.0
0.0
105
110
115
120
125
130
135
140
145
Generator heating inlet temperature / °C
Figure 5.63
Cooling power and COP as a function of generator inlet temperature for the third prototype
During the course of the measurement sequence with generator temperatures in-
creasing from about 110 to 140
◦
C and rather constant cooling water inlet temperatures
of about 23
◦
C, the evaporator outlet temperatures decreased and the cooling water
outlet increased by about 5 K (see Figure 5.64).
Summary of Experimental Performance
The first DACM prototype reached COP
values between 0.10 and 0.20 with an evaporator cooling capacity up to 1.5 kW.
However, the auxiliary gas circulation was not high enough, leading to rapid satu-
ration of evaporated ammonia. While evaporation took place between the condenser
35
Absorber out
Condenser out =
Absorber in
30
Condenser in
25
Evaporator in
20
Evaporator out
15
10
105
110
115
120
125
130
135
140
145
Generator heating inlet temperature / °C
Figure 5.64
Temperature levels of all components during a measurement sequence with increasing
generator temperatures
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