22.11 – 6755532_06
25
13 CORRECTION FACTORS
CORRECTIVE FACTORS FOR AVERAGE WATER TEMPERATURES DIFFERENT FROM NOMINAL VALUES
The pressure drops are calculated with an average water temperature of 50.0 °F (Cooling mode), 109.4 °F (Heating or recovery mode)
System side heat exchanger
Cooling mode
Heating mode or recovery
Average water temperatures
°F
41.0
50.0
59.0
68.0
86.0
104.0
122.0
73.4
82.4
91.4
100.4
109.4
118.4
127.4
134.4
Correction factor
1.02
1.00
0.98
0.97
0.95
0.93
0.91
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
FOULING: DEPOSIT CORRECTIVE FACTORS [K*M²]/[W]
0,0
0,00005
0,0001
0,0002
Corrective factor of cooling capacity
1,0
1
0.98
0.94
Corrective factor of imput power
1,0
1
0.98
0.95
14 GLYCOL
ETHYLENE GLYCOL
Cooling mode
CORRECTION FACTOR WITH ETHYLENE GLYCOL - COOLING MODE
Freezing Point
°F
0
25.47
21.02
15.93
10.20
3.67
–3.89
-12.62
-22.79
-34.78
Percent ethylene glycol
%
0
10
15
20
25
30
35
40
45
50
Qwc
–
1.000
1.033
1.040
1.049
1.060
1.072
1.086
1.102
1.120
1.141
Pc
–
1.000
0.990
0.985
0.980
0.975
0.970
0.965
0.960
0.955
0.950
Pa
–
1.000
0.996
0.994
0.992
0.990
0.988
0.986
0.984
0.982
0.980
Δp
–
1.000
1.109
1.157
1.209
1.268
1.336
1.414
1.505
1.609
1.728
Heating mode range
CORRECTION FACTOR WITH ETHYLENE GLYCOL - HEATING MODE
Freezing Point
°F
0
25.47
21.02
15.93
10.20
3.67
-3.89
-12.62
-22.79
-34.78
Percent ethylene glycol
%
0
10
15
20
25
30
35
40
45
50
Qwh
–
1.000
1.027
1.038
1.050
1.063
1.078
1.095
1.114
1.135
1.158
Ph
–
1.000
1.000
1.000
1.000
1.000
1.000
1.000
1.000
1.000
1.000
Pa
–
1.000
1.002
1.003
1.004
1.005
1.007
1.008
1.010
1.012
1.015
Δp
–
1.000
1.087
1.128
1.175
1.227
1.286
1.353
1.428
1.514
1.610
PROPYLENE GLYCOL
Cooling mode
CORRECTION FACTOR WITH PROPILENE GLYCOL - COOLING MODE
Freezing Point
°F
0
25.83
22.46
18.61
14.04
8.46
1.65
-6.65
-16.67
-28.70
Percent propilene glycol
%
0
10
15
20
25
30
35
40
45
50
Qwc
–
1.000
1.007
1.006
1.007
1.010
1.015
1.022
1.032
1.044
1.058
Pc
–
1.000
0.985
0.978
0.970
0.963
0.955
0.947
0.939
0.932
0.924
Pa
–
1.000
0.996
0.994
0.992
0.990
0.988
0.986
0.984
0.982
0.980
Δp
–
1.000
1.082
1.102
1.143
1.201
1.271
1.351
1.435
1.520
1.602
Heating mode range
CORRECTION FACTOR WITH PROPILENE GLYCOL - HEATING MODE
Freezing Point
°F
0
25.83
22.46
18.61
14.04
8.46
1.65
-6.65
-16.67
-28.70
Percent propilene glycol
%
0
10
15
20
25
30
35
40
45
50
Qwh
–
1.000
1.008
1.014
1.021
1.030
1.042
1.055
1.071
1.090
1.112
Ph
–
1.000
1.000
1.000
1.000
1.000
1.000
1.000
1.000
1.000
1.000
Pa
–
1.000
1.003
1.004
1.005
1.007
1.009
1.011
1.014
1.018
1.023
Δp
–
1.000
1.050
1.077
1.111
1.153
1.202
1.258
1.321
1.390
1.467
Attention: Avoid adding the glycol in the hydraulic circuit near the pump intake. A high concentration of glycol and additives above the permissible limits can block the pump: do
not use the pump as a mixer.
Qwc
Corrective factor of flow rates (middle water temperatur 49.1 °F)
Qwh
Corrective factor of flow rates (middle water temperatur 108.5 °F)
Pc
Corrective factor of cooling Capacity
Ph
Corrective factor of heating Capacity
Pa
Correction factor input Power
ΔP
Correction factor Pressure drop
Summary of Contents for ANK 030
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