Atlas Copco GA 11+ Instruction Book page 93

Instruction book
Type of cooling system
Single pass
Recirculating (with tower)
Closed loop
The table shows the recommended values. The values in bold are rejection limits.
6.1.6 Energy recovery data
Reference conditions
See section Reference conditions and
Effective working pressure
See section Compressor data for the normal working pressure.
Maximum allowed pressure of the heat exchanger
Oil side
Water side
Reading settings
In addition to other data, the following temperatures can be read on the controller display:
For air-cooled units:
• The water inlet temperature of the energy recovery system
• The water outlet temperature of the energy recovery system
Modifying settings
If the programmed warning settings for the water temperatures are exceeded, a warning
indication is shown on the controller:
2920 7118 31
Standard
5
< 10 / < 10
5
< 10 / < 10
3
< 10 / < 10
If additives are used in the cooling water, take into account that the cooling capacity will
change.
Δm = ((C - C ) * X) / (C
pw pa
with
Δm: change of mass flow of the coolant
C : specific heat capacity of water
pw
C : specific heat capacity of the additives
pa
X: the percentage of additives
limitations.
Biology (CFU/ml)
7
7
5
*(1-X) + X*C ) * 100 %
pw pa
15 bar (217 psi)
10 bar (145 psi)
Energy recovery
3 5
< 10 / < 10
not applicable
3 5
< 10 / < 10
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