Swirl diffusers OD11 - Pichler

Blade opening angle during heating and cooling operation
Calculation
OD-11V 200
COOLING
Blade angle
∆T
z
xampe 2 (i)
Q = 350 m³/h
H1 = 1,4 m
v H1 = 0,15 m/s
T
T z = -10 K
Recommended size: 200
v ef = Q/(A ef 3600) = 350/(0,0313600)
v ef = 3,13 m/s
v H1/v ef = 0,15/3,24 = 0,046
Blade angle: 32°
((Blade angle 32° Coanda effect)
H1 = 1,41,4 = 1,96 m
H = H1+1,8 = 1,96+1,8 = 3,67 m
or
H = 1,4 v H1 = 0,151,4 = 0,25 m/s
∆T
z
1 2 3 4 5 6 0,03
HEATING
H1 (m)
0,04 0,05
0,10 0,15
v H1 / v ef
7 6 5 4 3
2
1
2 3 4 5
v ef (m/s)
H1 (m)
6
OD-11V 250
COOLING
Blade angle
ΔT
z
OD-11V 315
COOLING
Blade angle
ΔT
z
-10 K
-15 K
-10 K
-15 K
ΔT
z
+5 K
1 2 3 4 5 6 7 0,03
HEATING
H1 (m)
0,04 0,05 0,10 0,15
v H1
/ v ef
1 2 3 4 5
0,03 0,04 0,05
0,10 0,15
H1 (m) v H1
/ v ef
HEATING
+10 K
ΔT
z
+15 K +5 K
+10 K
+15 K
7 6 5 4 3 2 1 1 2 3 4 5
v ef
(m/s)
H1 (m)
6
10
9 5
4 3
3 4 5 7 8 9 10
v ef
(m/s)
H1 (m)
11