Flooded type water cooled screw chiller (PCB Control)
81
Evaporator temperature drop factors
Performance tables are based on a 5
o
C temperature drop through the evaporator. Adjustment
factors for applications with temperature ranges from 3
℃
to 6
℃
in follow table. Temperature drops
outside this range can affect the control system’s capability to maintain acceptable control and are
not recommended.
Fouling Factor
ALTITUDE
(m)
Fouling Factor
0.018m
2
℃
/kW
0.044m
2
℃
/kW
0.086m
2
℃
/kW
0.172m
2
℃
/kW
C
P
C
P
C
P
C
P
Sea level
1.042
1.028
1.029
1.020
1.000
1.000
0.977
0.995
600
1.027
1.037
1.014
1.029
0.986
1.009
0.964
1.004
1200
1.014
1.050
1.001
1.041
0.973
1.021
0.951
1.016
1800
1.000
1.060
0.987
1.052
0.960
1.031
0.938
1.026
C--Cooling capacity
P
—Power
3).Design of the store tank in the system
a. kW is the unit for cooling capacity, L is the unit for (G) minimum water flow volume in the formula.
Comfortable type air conditioner
G= cooling capacity×2.6L
Process type cooling
G= cooling capacity×7.4L
b. In certain occasion (especially in manufacture cooling process), for conforming the system water
content requirement, it’s necessary to mount a tank equipping with a cut-off baffle at the system to
avoid water short-circuit, Please see the following schemes:
4).Water pipeline installation
Due to the variety of piping practices, it is advisable to follow the recommendations of local authorities.
The installation and insulation of the water pipelines of the air conditioning system shall be designed and
Error
Recommendation
Fig.4-4
Error
Recommendation
Error
Recommendation
Fig.4-4
Error
Recommendation
