VALLOX 130 E
© VALLOX • We reserve the right to make changes without prior notification.
9
PRESSURE LOSS IN THE WATER RADIATOR
EXAMPLE
PRESSURE LOSS IN THE RADIATOR
Pressure loss
Water flow dm
3
/s
Water flow dm
3
/s
Plastic connection
pipe ø12/ø8
°
C
°
C
Temperature of supply air going
from the unit to the dwelling
Temperature of outdoor air coming to the unit
-20
22
°
C
-10
0
+10
0
10
20
30
Temperature of outdoor air coming to the unit
1
2
3
4
HR cell anti-freezing starts to function
+20
EXAMPLE: Outdoor air temperature rise in the heat recoverycell
with an electric and water radiator
Curve 1
Supply air temperature without post-heating = only heat
recovery.
Curve 2
Supply air temperature controlled by the thermostat of the
electric radiator, adjustment setting 23
°
C (air flow less
than 75 l/s).
Curve 3
Supply air temperature with water radiator, water +35
°
C
and water flow 0.05 dm
3
/s. Air flow 50 l/s. Valve fully
open.
Because heat release of water radiator is dependent on
many factors, the curves are approximate. Glycol
decreases radiator power by circa 10...20% depending
on mixture.
Curve 4
A 1000 W post-heating radiator can heat e.g. 100 l/s air
by circa 8
°
C at most.
p
R
0
10
20
30
40
°
C
0
10
20
30
40
°
C
