R3400 Technical data - Rendamax

Rendamax
8.5 Cleaning the filter/screen in the gas combination block
Not applicable
8.6 Ionisation measurement
In order to carry out an ionisation measurement, a micro-am meter with a measuring range of
0 - 200 µA DC must be con nected in the ionisation circuit. In this way the ionisation protec tion
function can be checked. The nominal ionisation current is between 6 and 25 µA. The minimum
ionisation current is 2.8 µA.
8.7 Service
For service and maintenance the service department of your supplier is always available.
9 Conversion formulae and factors
Formulae
CO
2
20.
9 − measured O
=
20.9
2
× 11.
7
measured CO × 20.
9
O 2 = 20.
9 −
2
11.
7
11.7% CO 2 is the maximum CO 2 percentage that is generated by stoichiometric burning of G20
natural gas (H-gas).
Excess air N:
20.
9
N =
20. 9 − m easured O 2
× 0.
914
or
N = 1 ⎛ 11.
7 ⎞
+ ⎜
− 1⎟ ⎝ m ⎠
× 0.
914
CO easured
2
Conversion factors
For NO x (N=1):
1 ppm = 2.05 mg/m 3 = 1.759 mg/kWh = 0.498 mg/MJ
For CO (N=1):
1 ppm = 1.24 mg/m 3 = 1.064 mg/kWh = 0.298 mg/MJ
Example:
Measured values for an environmentally friendly unit:
NO x = 15 ppm
CO 2 = 10 %
What is the value for NO x according to the most usual standard in mg/kWh for N=1
10 × 20.
9
O 2 = 20.
9 − = 3%
11.
7
52 Doc890/3456CV02B