8
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 line represents the curve of air flow depending on the pressure drop at maximum
speed of the fan (100 %). The bottom 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 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.
