Environmental Engineering Reference
In-Depth Information
0.5
1.0
COP
Qo measured
0.4
0.8
0.3
0.6
0.2
0.4
0.1
0.2
0.0
0.0
0
1
2
3
4
5
6
7
8
9
10
Time / h
Figure 5.54 Cooling power and COP of the first prototype as a function of time with increasing
saturation of the auxiliary gas
the helium gas atmosphere, so the cooling power did not increase with increasing
generator power. Due to the low heat recovery factors Sr and Sw of the investigated
tubular SHX of 39.6% and 51.1% (the low and high values correspond to the rich and
weak solution sides respectively) the measured generator heating capacities were very
high and consequently the COPs were very low.
Results from Prototype 2 A second compacted pilot plant was built based on the
experiences and results from the first, using partly standard commercial components
such as nickel-soldered plate heat exchangers and a coaxial heat exchanger for the
condenser and the SHX, respectively. For this prototype, a further indirectly heated
0.7
14
0.6
12
0.5
10
Heating power
0.4
8
0.3
6
COP
0.2
4
0.1
2
Cooling power
0.0
0
155
160
165
170
175
Generator heating inlet temperature / °C
Figure 5.55 COP and heating and cooling power of the first prototype
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