Head Loss Side It Dilutes Of The Main Battery - Ferroli MERCURY SP - N 07 Manual De Instalación, Uso Y Mantenimiento

Head loss water side main battery
To calculate the loss of charge of the standard battery supplied with the Mercury-SP unit, the water flow volume must first be calculated; in
order to do this we shall use the following curves, which, depending on the capacity of the unit and the desired thermal difference, we obtain
the water flow volume.
Entering this flow volume into the following diagrams, we obtain the loss of charge of the main battery, working with a mean water temperature
of 10ºC.
For a water temperature other than 10ºC, the loss of charge can be calculated with the following formula:
ΔP = ΔP x K
cnom
C
Where:
DPcnom: is the head loss calculated in the diagram
ΔPc: is the head loss under conditions different from the previous ones
K: is the value obtained on the following tables.
Mean water temperature
K correction coefficient
130
4
3.5
3
2.5
2
1.5
1
0.5
0
0 10
40
30
20
10
0
500
40
30
20
10
0
1.500 2.000
5 10
1.05 1.00
Performance
T= 5°C
T= 10°C
T= 15°C
20 30
Power (kW)
11
13
1.500
1.000
Water flow rate (l/h)
17
19
2.500 3.000
Water flow rate (l/h)
K CORRECTION COEFFICIENT
15
0.97
T= 20°C
40 50
2.000
21
23
3.500 4.000
20 50
0.95 0.8
60 70
0.75 0.71