Panasonic PAW-DHWM200ZC Instrucciones De Instalación página 8

Pressure loss in case of using the pipeline system
In planning the pipeline system for the inlet and outlet of air to and from the heating
pump, the key element is to take into account the aerodynamic character of the fan
which also causes the loss of static pressure. The aerodynamic character of the fan
is also demonstrated on the diagram and is represented as pressure loss due to air
flow. The operating point of the fan is at 60 Pa of static pressure, or at the air flow
3
rate of 480 m /h. The acceptable level of pressure loss in the air pipeline in our
heating pumps is Δp ≤ 90 Pa. In case of such a drop in static pressure in the pipeline,
3
the volumetric air flow rate is 370 m /h. COP values within the allowed area of
pressure drops do not change significantly, i.e. they do not drop by more than 10%.
3
Volumetric flow rate of air [m /h]
Aerodynamic character of the fan
The values of the total loss of pressure can be calculated by adding up the losses of
individual elements built into the pipeline system. The values of static pressure losses
of individual elements (static pressure drops refer to inner diameter of 150 mm) are
provided in the table below.
Schematic demonstration of the basic elements in a pipeline system for inlet and outlet of air
8