Wöhler DC 17 Pressure Computer
58
Hotline: +49 2953 73-211
Fax: +49 2953 73-250
Based on the calculated mass flow rate of oil (m), it is possible to determine
the combustion capacity (P
Feurerung
) with the help of the calorific value (H
u
).
The combustion capacity can then be used to determine the nominal capaci-
ty (P
Nenn
) with the help of the boiler efficiency (
η
).
with: H
u
[kWh/kg]
lower calorific value of fuel oil, 11.86 kWh/kg (can
be set in the Setup menu)
m[kg/h]
actual mass flow rate of oil in kg/h
P
Feuerung
[kW]
heat input
η
[%]
boiler efficiency, e. g. measured
with Wöhler A 500/600
P
Nenn
[kW]
set nominal capacity of the boiler
Example:
Imprint on nozzle: 0.5 USgal/h with p
Aufdruck
[bar] = 7 bar, no preheating,
boiler efficiency = 88 %
Wöhler DC 17 measuring value: 8,000 hPa pump pressure
Calculated values in the printout of results:
Mass flow rate of oil
=
1,72 kg/h
Volumetric oil flow rate
=
2.05 l/h
equation 6.2.3
equation 6.2.4
6. Equations
