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Promass 60
Pertes de charges
La perte de charge dépend des propriétés du fluide et de son débit. Pour les liquides
on pourra utiliser par approximation les formules suivantes :
Promass A / I
4 ⋅ m
Nombre de
Re =
π ⋅ d ⋅ υ ⋅ ρ
Reynolds
Re ≥ 2300 *
∆p = K ⋅ υ
∆p = K1 ⋅ υ ⋅ m +
Re < 2300
∆p = perte de charge (mbar)
•
υ
= viscosité cinématique (m²/s)
m
= débit massique (kg/s)
*Pour les gaz, il convient d'utiliser la formule valable pour Re ≥ 2300 pour le calcul de la perte de charge.
DN
1,10 ⋅ 10
DN
1
Promass A
1,80 ⋅ 10
DN
2
3,50 ⋅ 10
DN
4
1,40 ⋅ 10
Promass A
DN
2
3,00 ⋅ 10
haute
DN
4
pression
8,55 ⋅ 10
DN
8
11,38 ⋅ 10
DN 15
17,07 ⋅ 10
DN 15 *
17,07 ⋅ 10
DN 25
Promass I
25,60 ⋅ 10
DN 25 *
25,60 ⋅ 10
DN 40
35,62 ⋅ 10
DN 40 *
35,62 ⋅ 10
DN 50
5,53 ⋅ 10
DN
8
8,55 ⋅ 10
DN 15
11,38 ⋅ 10
DN 25
Promass M
17,07 ⋅ 10
DN 40
25,60 ⋅ 10
DN 50
38,46 ⋅ 10
DN 80
4,93 ⋅ 10
Promass M
DN
8
7,75 ⋅ 10
DN 15
haute
10,20 ⋅ 10
DN 25
pression
5,35 ⋅ 10
DN
8
8,30 ⋅ 10
DN 15
Promass F
12,00 ⋅ 10
DN 25
17,60 ⋅ 10
DN 40
26,00 ⋅ 10
DN 50
40,50 ⋅ 10
DN 80
Indications de pertes de charge y compris passage tube de mesure/conduite
Des exemples de diagrammes de perte de charge pour l'eau se trouvent à la page suivante !
* DN 15, 25, 40 "FB" = Promass I avec continuité de diamètre intérieur
Endress+Hauser
•
•
•
K3 ⋅ m
2
0,25
⋅ m
1,75
⋅ ρ
-0,75
+
ρ
•
•
K3 ⋅ m
2
ρ
ρ = densité du fluide (kg/m
d
= diamètre intérieur des tubes de mesure (m)
K...K3 = constantes (en fonction du DN)
d [m]
K (liquide
K (Gaz)
1,2 ⋅ 10
2,0 ⋅ 10
–3
11
1,6 ⋅ 10
2,7 ⋅ 10
–3
10
9,4 ⋅ 10
16,0 ⋅ 10
–3
8
5,4 ⋅ 10
9,2 ⋅ 10
–3
10
2,0 ⋅ 10
3,4 ⋅ 10
–3
9
8,1 ⋅ 10
13,8 ⋅ 10
–3
6
2,3 ⋅ 10
3,9 ⋅ 10
–3
6
4,1 ⋅ 10
7,0 ⋅ 10
–3
5
4,1 ⋅ 10
7,0 ⋅ 10
–3
5
7,8 ⋅ 10
13,3 ⋅ 10
–3
4
7,8 ⋅ 10
13,3 ⋅ 10
–3
4
1,3 ⋅ 10
2,2 ⋅ 10
–3
4
1,3 ⋅ 10
2,2 ⋅ 10
–3
4
5,2 ⋅ 10
8,8 ⋅ 10
–3
7
5,3 ⋅ 10
9,0 ⋅ 10
–3
6
1,7 ⋅ 10
2,9 ⋅ 10
–3
6
3,2 ⋅ 10
5,4 ⋅ 10
–3
5
6,4 ⋅ 10
10,9 ⋅ 10
–3
4
1,4 ⋅ 10
2,4 ⋅ 10
–3
4
6,0 ⋅ 10
10,2 ⋅ 10
–3
7
8,0 ⋅ 10
13,6 ⋅ 10
–3
6
2,7 ⋅ 10
4,6 ⋅ 10
–3
6
5,7 ⋅ 10
9,7 ⋅ 10
–3
7
5,8 ⋅ 10
9,9 ⋅ 10
–3
6
1,9 ⋅ 10
3,2 ⋅ 10
–3
6
3,5 ⋅ 10
6,0 ⋅ 10
–3
5
7,0 ⋅ 10
11,9 ⋅ 10
–3
4
1,4 ⋅ 10
2,4 ⋅ 10
–3
4
Promass M / F
•
2 ⋅ m
Re =
π ⋅ d ⋅ υ ⋅ ρ
•
K ⋅ υ
0,25
⋅ m
1,85
Dp =
•
K2 ⋅ υ
∆p =
K1 ⋅ υ ⋅ m +
3
)
K1
K2
1,3 ⋅ 10
11
11
–
2,4 ⋅ 10
10
10
–
2,3 ⋅ 10
8
9
–
6,6 ⋅ 10
10
10
–
4,3 ⋅ 10
9
9
–
3,9 ⋅ 10
6
7
–
1,3 ⋅ 10
6
7
–
3,3 ⋅ 10
5
6
–
3,3 ⋅ 10
5
6
–
8,5 ⋅ 10
4
5
–
8,5 ⋅ 10
4
5
–
2,0 ⋅ 10
4
5
–
2,0 ⋅ 10
4
5
–
8,6 ⋅ 10
1,7 ⋅ 10
7
7
7
1,7 ⋅ 10
9,7 ⋅ 10
6
7
5
5,8 ⋅ 10
4,1 ⋅ 10
6
6
5
1,2 ⋅ 10
1,2 ⋅ 10
5
6
5
4,5 ⋅ 10
1,3 ⋅ 10
4
5
4
8,2 ⋅ 10
3,7 ⋅ 10
4
4
3
1,4 ⋅ 10
2,8 ⋅ 10
7
8
7
2,5 ⋅ 10
1,4 ⋅ 10
6
7
6
8,9 ⋅ 10
6,3 ⋅ 10
6
6
5
9,6 ⋅ 10
1,9 ⋅ 10
7
7
7
1,9 ⋅ 10
10,6 ⋅ 10
6
7
5
6,4 ⋅ 10
4,5 ⋅ 10
6
6
5
1,3 ⋅ 10
1,3 ⋅ 10
5
6
5
5,0 ⋅ 10
1,4 ⋅ 10
4
5
4
8,2 ⋅ 10
3,7 ⋅ 10
4
4
3
9 Caractéristiques techniques
⋅ ρ
-0,86
•
0,25
⋅ m
2
ρ
K3
0
0
0
0
0
129,95 ⋅ 10
4
23,33 ⋅ 10
4
0,01 ⋅ 10
4
5,89 ⋅ 10
4
0,11 ⋅ 10
4
1,19 ⋅ 10
4
0,08 ⋅ 10
4
0,25 ⋅ 10
4
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
91
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