Airwell K 45 OG [7/16] Pressure drops
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Airwell K 45 OG [7/16] Pressure drops

Airwell K 45 OG [7/16] Pressure drops
Page 7
Pressure Drops
K : Glycol coefficient
Twm (°C)
% Glycol
10 20 30 40 50
3 1.135 1.234 1.385 1.53 1.85
5 1.13 1.23 1.38 1.51 1.77
10 1.12 1.22 1.37 1.47 1.66
15 1.11 1.19 1.36 1.46 1.64
20 1.1 1.18 1.35 1.44 1.59
25 1.09 1.17 1.33 1.43 1.57
30 1.08 1.16 1.31 1.42 1.56
35 1.07 1.15 1.29 1.41 1.54
40 1.06 1.14 1.28 1.4 1.52
45 1.05 1.13 1.25 1.37 1.49
50 1.04 1.12 1.22 1.34 1.47
55 0.99 1.1 1.2 1.31 1.44
60 0.94 1.09 1.19 1.28 1.42
Tse (°C)
% Glycol
10 20 30 40 50
-25 yes
-20 yes yes
-15 yes yes
-10 yes yes yes
-5 yes yes yes yes
0 yes yes yes yes yes
5 yes yes yes yes yes
Twm : Average temperature of the mixture.
Tse :
Outdoor dry temperature.
∆Pwo : Pressure drops of pure water.
∆Pw : Pressure drops of brinewater.
∆Pw : K x ∆Pwo.
3210
Size 30
Size 45 - 4 pipes
Size 45 - 2 pipes
50
40
30
20
10
0
∆Pwo
Pressure drop
Water flow
m
3
/h
Pressure drops at nominal flow (pure water)
Size 30 Size 45 - 2 pipes Size 45 - 4 pipes
Nominal flow m
3
/h 1.206 1.753 1.89
∆P kPa 17 23.5 34.3

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