Gorenje TC80Z Mode D'emploi page 14

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.
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.
- Area of more efficient use – volumetric flow of air is higher here, which requires a lower pressure drop (channel system with
minimum pressure drop). Fan is set to higher speeds.
- Operating area with a normal air flow with respect to the pressure drop and fan setting.
Diagram 1: Aerodynamic characteristics
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Air flow [m³/h]