Automatic Measuring System. Measurement system, which is owned and operated by the plant and which is used for environmental reporting.
EN 17255
A count and cut-off of measurements outside the measuring range is made for all measured components. This compensates for the difference between components measured via BUS and 4-20mA
Classic
No
All values have an Asterix attached, which explains how the value is interpreted in ReportLoq.
Asterisk is listed in order of priority.
FLD (First Level Data):
T = Test data
P = Plant not active
S = Plant stopped
D = AMS Rejected (Plexer …)
C = AMS in Maintenance
M = AMS in error
R = Replacement value
V = Valid
STA (Short Time Average):
EN = Environmental reporting not relevant
VR = Replacement value
NV = Not Valid
VA = Valid but exceeded
VP = Valid data with secondary replacement
VD = Valid data
LTA (Long Time Average):
EN = Environmental reporting not relevant
VR = Replacement value
NV = Not Valid
VA = Valid but exceeded
VP = Valid data with secondary replacement
VD = Valid data
STA limit value to be met typically 95/97% of the time on an annual basis.
During SRM, a valid calibration interval is defined, which covers a well-defined range (from the zero point to slightly above the highest results from the parallel measurement). AMS signals that are outside the valid calibration interval are valid and must be reported, but a new QAL2 is required if the AMS is outside the valid calibration interval for a longer period of time.
O2_ref
Oxygen reference used in connection with correction factor for K_O2 according to the environmental approval
O2_max
Maximum O2 value allowed in connection with correction factor for K_O2, this ensures that the K_O2 factor does not exceed 2.5
K_P:
Factor used to convert to pressure reference state (1013 hPa)
Formula: K_P = 1013 / P_act
Example: Increased pressure leads to lower K_P
K_T
Factor used to convert to Temperature reference state (0°C)
Formula: (273 + T_act) / 273
Example: Increased temperature leads to greater K_T
K_H2O
Factor used to convert to Dry reference state(0 Vol.% H2O)
Formula: 100 / (100 – H2O_act)
Example: Increased H2O results in greater K_H2O
K_O2
Factor used to convert to O2 reference state
Formula: (21-O2_ref) / (21-O2)
Example: Increased O2 content results in larger K_O2
There are 2 ways to check FLD calculations
Method 1.
Activate the show calculations button.
Method 2.
Activate the corrected value for the component to be checked with the mouse.
General info for the line shown.
– Line: Line name
– Last updated: When was FLD data last retrieved
– Delay: How old are the displayed FLD data
The value is irrelevant in terms of reporting
The value is not used for evaluation against limit values
The value complies with the limit value
The value does not appear to exceed the limit values belonging to the STA / LTA range. Operation can therefore be continued without risking environmental overruns.
The value is assumed to exceed a limit value
33% inside the range, the rest of the range is calculated. For an hourly value of 60 minutes, this means that after 20 minutes, ReportLoq estimates the emission value at which the hour ends. The estimate is based on the most recent values in the range. If the estimate exceeds one of the limit values for the interval, the value is marked.
The CEMS image shows the following columns.
Raw value.
Visualize raw signal to ReportLoq, typically the same value that can be read on AMS.
QAL3 calibrated value.
Raw value printed with QAL3 A & B values (QAL3 = Raw value x QAL3B + QAL3A).
QAL2 calibrated value.
QAL3 value printed with QAL2 A & B values (QAL2 = QAL3 x QAL2B + QAL2A).
Correction.
Lists which correction factors the component in question is applied to achieve reference mode. the value of the correction factors is listed at the bottom left of the CEMS image in the “correction factors” section.
Corrected value.
QAL2 value printed corrections, whereby the component is assigned to the reference state.
Conf. Interval.
Confidence interval used to validate environmental values.
Quality assured value.
Corrected value minus confidence interval, however, the value cannot be less than 0. The value is also called validated value.
quality assured value = corrected value – confidence interval.
Valid.
Green fly leg = The signal is good and can be used in subsequent aggregations.
Red = The signal is not good and is rejected in subsequent aggregations.
If the mouse cursor is held over the valid icon, a detailed pop-up will appear showing which signals can validate the component.
xx min. gns.
Aggregated STA. Typical 30/60 minute STA value.
x Dag gns. / Monthly average. / Year average.
Aggregate LTA based on STA
To ensure that the K_O2 factor cannot be higher than 2.5, the O2 included in the reference formula is limited to O2_max. If O2 is not limited, K_O2 can approach an infinite number, thereby destroying the corrected values where K_O2 is included.
Clarification form review
Part 1:
- In general
- Component setup
Clarification form review
Part 2:
- Environmental requirements setup
- Reports
Classic refers to the ReportLoq version before EN17255 was implemented.
History: The long awaited standard for environmental reporting systems EN17255-1 was adopted in 2019. Prior to the release of the standard, there were only recommendations for environmental reporting. It has therefore been difficult to unambiguously confirm how data should be validated and calculated. This has meant that each individual supplier has made interpretations, based on their own experience, however with the support of available method sheets (ReportLoq “Classic”). The result has not been satisfactory for either the supplier, end user or environmental body.
In ReportLoq, a lot of time has been spent on developing and quality-assuring compliance with the new standard, and it is Olicem’s recommendation that “Classic” customers change the environmental reporting to follow EN 17255: 2019. There are already references in current method sheets, and typically in connection with a reassessment of a work’s environmental approval, reference will be made to EN 17255.
If CO2 is compared with another CO2 calculated under a different O2 reference, the CO2 level will deviate considerably.
EN 17255 & Classic
Historical replacement values are during the year highest measurement one week back (as prescribed for NO x calculations according to BEK no. 723 of 24/06/2011), and at the end of the year an average of valid intervals plus twice the meter’s standard deviation according to 601/2012 Article 45.
CO2 Vol.% Is converted to mg / Nm3 using molecular weight 44,009 taken from http://www.kayelaby.npl.co.uk/chemistry/3_1/3_1_2.html after which it is multiplied by flow at STA level
Thereby the calculation becomes: CO2 Vol.% * Molecular weight * Flow Nm3 / h * 0.001 * 0.001 = [kg]
The above information about molecular weight can be found under Company Info
As a replacement value for H2O, 0 volume per cent is used. or the lowest possible volume per cent. for the plant (In accordance with BEK 1412 of 21/12/2012 §3).
As a replacement value for O2, 3 volume per cent is used. or the lowest possible volume per cent. for the plant (In accordance with BEK 1412 of 21/12/2012 §3).
1063 hPa is used as the replacement value for pressure (According to BEK 1412 of 21/12/2012 §3).
The lowest possible flue gas temperature for the plant in ° C is used as a replacement value for temperature (In accordance with BEK 1412 of 21/12/2012 §3).
The O2 reference is set at 0% in accordance with BEK 1412 of 21/12/2012 §4. However, the reference state can be changed as it will not affect the calculated emitted amount since O2 equalizes when multiplied by flow.
EN17255
A count and cut-off of measurements outside the measuring range is made for all measured components. This compensates for the difference between components measured via BUS and 4-20mA.
According to EN17255-7.3, the FLD must be cut off at the maximum measuring interval (above the level of the measuring range). Cutting must be flagged but not counted in the cutting report. Cut-off due to meter interval is visualized in the count report
Example:
– AMS uses a measurement interval called 0-200.
Cut-off is 200.
– AMS value is 210.
– FLD is defined in ReportLoq as 200
FLD is counted in the counting report but does not have to be counted in the cut-off report. If the cut-off had been less than the measurement interval, it should have been counted on the cut-off report and not in the counting report.
Classic
FLD is cut according to cut-off level, and visualized in cut-off report.
Example:
– AMS uses a measurement interval called 0-200.
Cut-off is 200.
– AMS value is 210.
– FLD is defined in ReportLoq as 200
FLD is counted in cut-off report.
Data Acquisition and Handling System Refers to the environmental reporting system which in this case is ReportLoq and the hardware used for this.
OPC UA connection
This video shows how ReportLoq connects to an OPC UA server and how data is loaded from and sent to the OPC server.
The video also shows how the values can be verified and how the entered note values can subsequently be verified in ReportLoq
Discarded days occur if the number of goodfactor exceedances in a day exceeds the limit (typically 3 or 5). The number of days discarded is counted in the exceedance report.
A new counting report is added which shows trends as well as a start / stop report which shows the plant’s operating status for the year.
Details
More about: Interval, counting
More about: Operating time, Start / Stop
Current discharge in reference mode minus confidence interval.
- Used for checking limit values.
In ReportLoq, a lot of time has been spent on developing and quality-assuring compliance with the new standard, and it is Olicem’s recommendation that “Classic” customers change the environmental reporting to follow EN 17255: 2019. There are already references in current method sheets, and typically in connection with a reassessment of a work’s environmental approval, reference will be made to EN 17255.
First Level Data
The logged data. In ReportLoq, data is logged at fixed intervals. Can be set between every 10 and 60 seconds. For emission reporting, there is a requirement for logging every 10 seconds.
STA typically needs 66.67% valid FLD values, in order to
– be used for validating environmental requirements
– be used for LTA calculation
FLD value is valid if it is representative of the flue gas composition. An valid AMS measurement can therefore not be in fault or maintenance.
Current discharge in reference mode without subtraction of confidence interval.
- Used for calculating masses [kg]
- Includes values measured during plant operation, plant startup and plant shutdown
EN 17255
Calculated on the basis of STA value for e.g. 30 or 60 min.
Classic
Calculated on the basis of LTA value for days.
EN 17255
After QAL2 correction, the FLD values are aggregated to STA values. Subsequent calculations (reference mode, validation) are performed on STA values.
Classic
All calculations from raw value to quality-assured value are performed on FLD values.
Installation Guide for ReportLoq
See, how:
- ReportLoq is installed on Windows
- The ReportLoq trial license is activated
- The configuration file with environmental settings is loaded
- Test values can be generated in ReportLoq
Long Term Average average values of a day or more. Is in ReportLoq 1 day or 1 month.
σ0 = AMS quality requirement multiplied by 1.96.
Measurements performed in parallel with AMS. Parallel measurements are performed by an accredited
measuring company according to standardized reference methods.
Short Term Average Average values between 1 and 60 minutes.
Calculation of valid calibration intervals is based on EN 14181: 2014 (6.5), which describes that hourly average values must be within the interval in which the AMS analyser is tested. If you have started to exceed the calibration interval, it means that: It is either a sign that the meter is not measuring correctly or that the operation of the system has changed.
If the analyser does not measure correctly, this should of course be corrected. Possibly by servicing the analyser. If AST is performed, the calibration interval in ReportLoq must be extended according to the AST report. This can solve the problem in some cases.
If the operation of the system has changed so much that it has started to exceed the calibration interval, it often results in a new QAL2. Here, the analyser will be tested again during the plant’s new operating situation. When the result of the test is entered in ReportLoq together with the new and larger calibration range, ReportLoq will take into account the extension. This can also in some cases solve the problem.
For more information on the subject see the article: Valid calibration range
EN 17255
66% of the interval must be environmental reporting active.
Classic
The entire interval (typically 30 or 60 minutes interval) must be active in environmental reporting.
EN 17255
Calculated only on the basis of oven status: up / down + operation.
Classic
Possibility to use ACC signal to determine whether mass calculation is relevant
In case of maintenance or failure, constants such as FLD replacement value for O2, H2O, Temperature & Pressure are used. Constants used are listed under company info.
EN 17255
Emission value: It is not possible for primary measurements to use replacement values due to AMS in maintenance. Maintenance counts as outdoor time.
Green values: Historical replacement values are the highest measurement during the year one week back (as prescribed for NO x calculations according to BEK no. 723 of 24/06/2011)
Classic
Emission value: It is possible to use replacement values at AMS in maintenance.
Green values: Historical replacement values are the highest measurement during the year one week back (as prescribed for NO x calculations according to BEK no. 723 of 24/06/2011)
EN 17255
If the oven has been at least 10% active during the LTA period, the monthly LTA is calculated.
Classic
All valid 24-hour LTAs are used to calculate the monthly LTA
EN 17255 & Classic
The reference mode can be seen under Company Info. Typically, STA values are calculated at 273.15 K, 1013 hPa, 0% H2O and at 0% O2