cPf
cQ
cdp
0
1
1
1
12%
0.98
1.02
1.07
20%
0.97
1.04
1.11
28%
0.965
1.075
1.18
35%
0.96
1.11
1.22
40%
0.955
1.14
1.24
Thermal head min.- max. 4-6
Water circuit pressure (bars) 1-3
Max.storage temperature 55
7.1 Ethylene glycol solutions
Water and ethylene glycol solutions used as a thermal vector in the
place of water reduce the performance vector in the place of water
reduce the performance values given in the following table.
CAUTION
During winter leaving the unit unused, please drain water out
completely from unit if no antifreeze were charged into pipeline,
or keep power on(at standby or off status) and ensure that water
is contained inside of unit.
When ambient temperature lower 5
running cooling mode
must be charged antifreeze. Refer to upper parameters for the
charged volume.
0 -5 -10 -15 -20 -25
Freezing point (°C)
Percentage of ethylene glycol in weight
cPf: correction factor refrigerating capacity
cQ: correction factor flow rate
cdp: correction factor pressure drop
7.2 Fouling factors
The performance data given refer to conditions with clean evaporator
plates (fouling factor=1).For different fouling factors,multiply the
figures in the performance tables by the coefficient given in the
following table.
f1: capacity correction factor
fk1: compressor power input correction factor
fx1: total power input correction factor
4.4 x 10-
5
0.86 x 10-
4
1.72 x10-
4
-
0.96
0.93
-
0.99
0.98
-
0.99
0.98
Fouling factors
(m
2
°C/W) f1
Evaporator
fk1 fx1
8. HYDRAULIC DATA
8
8.1 Useful pump head curves (36/60 BTUS/h)
