Heinzmann E-LES 30, Manual

Page: 53 / 106

9 Commissioning
KRONOS 20
45
If Q
gasmea
(measured value) = Q
gascal
(3453
GasFlowRateDesired
) ,
(within
±
2 %), then continue with C)
If Q
gasmea
< Q
gascal
then:
1. Reduce η
vol
(9420 - 9483 VolEffMap or 1412 VolEfficiencyConst) at the current load
and speed point of the map until Qgascal = Qgasmea.
If Q
gasmea
< Q
gascal
then:
1. Increase η
vol
(9420 - 9483
VolEffMap
or 1412 VolEfficiencyConst) at the current load
and speed point of the map until Q
gascal
= Q
gasmea
2. Repeat this calibration for the other three load points, e.g., 80 %, 60 % and 40 % load.
3. Interpolate the missing values in the volumetric efficiency map (9420 - 9483
VolEff-
Map
) at rated speed and verify and, if necessary, calibrate the values at other speeds.
By changing Venturi efficiency (A) or volumetric efficiency (B) the quantity and the mix-
ing ratio of the gas mixture have been calibrated.
9.4 Further Commissioning for CLOSED LOOP (closed control circuit)
with Output Power
In order to obtain a good regulation of the mixture control in a closed control circuit the
desired lambda values (
λ
des
(3462
LambdaDesiredValue
)) must not necessarily correspond
to the actual measured values ( λ
cal
(3463
LambdaActualValue
)). Variations up to
±
20 % are acceptable. This is also true for other values, such as calculated gas flow rate
(Q
gascal
(3453
GasFlowRateDesired
)), calculated generator power (P
cal
(3411
Calculated-
Power
)) and mechanical generator efficiency ( η
set
(9500-9583
MechEffMap
or 1413
MechEfficiencyConst
)) in relation to the respective measured values. The quality of the
open loop and of the closed loop systems as a whole is not prejudiced by these differences.
Example: If no measuring device is available for measuring the
λ value, but measuring de-
vices for the adjustment of NO
x
emissions and/or oxygen content ratio are available in-
stead, a satisfactory adjustment of the system is possible without knowing the effective λ
value.
The parameter values pre-set by HEINZMANN usually lead to a satisfactory control result
both for open loop and for closed loop and constitute a good starting point for fine tuning.
C) Measured generator output power must correspond roughly to effective genera-
tor output
(calibration of 2914
MeasuredPower
)
If P
mea
(measured value) = P
act
(2914
MeasuredPower
),
(within
±
2 %), then continue with D)