Panasonic AQUAREA DHW Manual Del Usuario página 12

Calculation of pressure drops
The values of total static pressure drop can be calculated by adding up the losses
from individual elements built into the air pipeline system and the internal static
pressure. The values of static pressure drops of individual elements (static pressure
drops of elements relate to the internal diameter ø125mm or □150x70mm) are shown
in Table no. 2.
Type of element
a.) Spiral ribbed pipe
b.) Rectangular pipe □150x70 mm
c.) Rectangular elbow - horizontal 90°
d.) Elbow 90°
e.) Angular reducer ø125 to □150x70
f.) Rectangular elbow - vertical 90°
g.) Elbow 45°
h.) Reducer ø125 to □150x70
i.) Flexible tube
j.) Air intake grid
Table no. 2: Types of elements and corresponding pressure loss values
Flexible pipe according to DN 125
Spiral ribbed pipe DN 125
Diagram 2: Value of the static pressure drop for selected pipes
12
Value of static pressure loss
Diagram 2
Diagram 2 (according to DN 125)
5 Pa
4 Pa
5 Pa
5 Pa
3 Pa
3 Pa
Diagram 2
25 Pa
Volumetric air flow [m³/h]