Measuring report and calculations
dreizler A 3001 E - 18.12.2015 | A 2015 - 1.12 | EN - 09.11.2012
167
51 Measuring report and calculations
51.1 Generating a measuring report
Fill out the measuring report.
Enter the burner type, burner number and year of manufacture.
Enter the boiler brand, boiler type and boiler capacity.
In burners with pneumatic components, at least 2 load points must be measured.
Take the first measurement at min. burner capacity.
Take the second measurement at medium burner capacity.
Take the third measurement at full burner capacity.
NOTICE:
The measuring report form is included in the appendix of this operations manual. All measurable pressures
and settings should be recorded in the measuring report. These include e.g. the configuration values of the
gas and air pressure switches, and the settings
N
and
V
for the pneumatic ratio regulator.
51.2 Emission measurements and corrections according to EN 676:2008+A2 and
EN 267:2009+A1:2011
51.2.1 Emission measurements
The measurements shall be made in the connecting duct between the combustion chamber and the chim-
ney beyond the heat exchanger. For accurate sampling a representative measuring point shall be chosen
in the flow of the combustion products, determined by means of multiple measurements.
51.2.2 Correction of the influence of combustion air temperature and humidity on NO
x
-
emissions
To correct the influence of combustion air temperature and humidity on NOx-emissions to reference con-
ditions 10 g/kg for humidity and 20°C for temperature Equation 1 shall be used:
Fig. 51-1 Equation 1
with the following units and validated ranges of measurements:
NO
x
is the NO
x
in mg/kWh, measured at h
meas
und t
meas
, measured in the range 50 mg/kWh
to 300 mg/kWh, measured at h
meas
und t
meas
h
meas
is the humidity in dry air during the measurement of NO
x
in g/kg, in the range of 5 g/kg to
15 g/kg
t
meas
is the temperature of combustion air during the measurement of NO
x
in °C in the range of
15°C to 30°C
NO
xref
is the value of NO
x
corrected to the reference conditions expressed in mg/kWh
