Panasonic AQUAREA DHW Manual Del Usuario página 10

Fig. 5: Possible installation of a heat pump
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 heat
pump, the key element is to take into account the aerodynamic character of the fan
which also causes the loss of static pressure.
Presentation of the diagram of aerodynamic characteristics for different speeds
of the fan
The diagram (Diagram 1) includes aerodynamic characteristics of the operation of
the fan. The top (purple) line represents the curve of air flow depending on the
pressure drop at maximum speed of the fan (100 %). The bottom (brown) line
represents the operation of the fan at minimum speed (40 %). The curves between
(60 %, 80 %) represent the aerodynamic characteristics at lowered revolutions of the
fan. The bottom (red) line that lies between points (0,0) and (340,50) represents the
internal drop of static pressure created by the evaporator alone, without overloading
the pipeline system. This pressure drop cannot be eliminated.
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