Fouling Factors - AERMEC NSB Serie Manual Tecnico

Enfriadoras y bombas de calor aire agua y motocondensadores con compresor bi-tornillo
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7.2
COOLING CAPACITY AND
IMPUT POWER
- VERSION "HIGH EFFICIENCY
SILENCED MODE"
1,50
1,40
1,30
1,20
1,10
1,00
Ca
0,90
0,80
0,70
0,60
0,50
0,40
-6
-5
1,50
1,40
1,30
1,20
1,10
1,00
Cf
0,90
0,80
0,70
0,60
0,50
0,40
-6
-5
7.3
FOR ∆T DIFFERENT
TO NOMINAL
FOR ∆T OTHER THAN 5°C
For the evaporator, the Tav.7.3. 1 is used to
obtain the correction factors of the cooling
and input capacities. To take into account
the dirtying of the exchangers, the relative
dirtying factors are used
7.4

FOULING FACTORS

The performances provided in the table
refers to conditions where the pipes
are clean with an fouling factor = 1. For
different fouling factor values multiply the
data in the performance tables by the
coefficients shown.
The refrigerating capacity yielded
and the input electrical capacity in
conditions other than rated conditions
are obtained by multiplying the rated
values (Pf, Pa) by the respective
corrective coefficients (Cf, Ca).
-4
-3
-2
-1
0
1
2
-4
-3
-2
-1
0
1
2
Produced water temperature t∆5°C
7.3. 1
Correction factors for ∆t different from the rated value Chiller
Cooling capacity correction factors
Total imput power corrections factors
7.4. 1
Fouling factors
Cooling capacity correction factors
Total imput power corrections factors
48
48
5
6
7
8
9
3
4
48
48
5
6
7
8
9
3
4
[K*m 2 ]/[W] 0,00005
The diagrams on the following page
(page 20) make it possible to obtain
correction coefficients to be used for
the chillers in cooling operation mode;
next each curve the external air
temperature to which it refers
45
45
40
40
35
35
30
30
25
25
20
20
10 11
12
13 14
15
16
20
20
25
25
30
30
35
35
40
40
45
45
10 11
12
13 14
15
16
3
5
8
0,99
1
1,02
0,99
1
1,01
0,0001
1
0.98
1
0,98
10
1,03
1,02
0,0002
0.94
0,95
19

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