M07J40G8-00 21/07/08 page 49
INTERNAL EXCHANGER PRESSURE DROP
10 15 20 25 30 35 40 45 50 60 70 80 90
20
30
40
50
60
70
80
90
100
110
120
Q [l/s]
Δ
P [kPa]
2
.
1
6
0
2
.
1
8
0
-
2
.1
9
0
-
2
.
2
0
0
2
.
2
4
0
2
.
2
8
0
-
2
.
3
0
0
-
2
.3
2
0
2
.
3
4
0
-
2
.3
6
0
2
.
6
0
0
2
.
4
4
0
-
2
.4
8
0
2
.
5
4
0
Qmin
[l/s]
Qmax
[l/s]
2.160 10 . 5 25.0
2.180 12 . 2 29.9
2.190 11. 6 28.2
2.200 12 . 4 31.1
2.240 14 . 9 36.7
2.280 18 . 7 46.3
2.300 17 . 7 43.9
2.320 17 . 7 43.9
2.340 20.5 50.3
2.360 21.2 52.1
2.440 27.8 70.4
2.480 27.0 67.3
2.540 27.8 74.3
2.600 26.3 71.8
CORRECTION FACTOR FOR ANTIFREEZE SOLUTIONS
% ethylene glycol by weight 5% 10% 15% 20% 25% 30% 35% 40%
Freezing temperature °C -2.0 -3.9 -6.5 -8.9 -11.8 -15.6 -19.0 -23.4
Safety temperature °C 3.0 1.0 -1.0 -4.0 -6.0 -10.0 -14.0 -19.0
Cooling Capacity Factor Nr 0.995 0.990 0.985 0.981 0.977 0.974 0.971 0.968
Compressor input Factor Nr 0.997 0.993 0.990 0.988 0.986 0.984 0.982 0.981
Internal exchanger Glycol solution flow Factor Nr 1.003 1.010 1.020 1.033 1.050 1.072 1.095 1.124
Pressure drop Factor Nr 1.029 1.060 1.090 1.118 1.149 1.182 1.211 1.243
FOULING CORRECTION FACTOR
INTERNAL EXCHANGER
m² °C/W F1 FK1
0.44 x 10^(-4) 1.00 1.00
0.88 x 10^(-4) 0.97 0.99
1.76 x 10^(-4) 0.94 0.98
EXCHANGER OPERATING LIMITS
INTERNAL EXCHANGER
DPr (S - B) DPw
kPa kPa
CLIVET (C) 2450 2450 1050
PED (CE) 2450 2450 1050
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