INTHUU MEASUREMENTS CC

Transcription

1 INTHUU MEASUREMENTS CC VAT REG NO.: REG NO.: 2009/190265/23 P.O. Box Bredell, 1623 Plot 2/410 Seventh Road Bredell A/H, Kempton Park, 1619 Tel: +27 (0) Fax: +27 (0) Sick Automation Southern Africa (Pty) Ltd P.O. Box 430 Florida Hills 1724 Date Your Reference Our Reference Enquiries CC Scheepers 06 July 2016 Order No.: PO26492 and RCCS234(1) Cell: REPORT 2015/06/24/RCCS234(1) STRATIFICATION AND PARALLEL GASEOUS EMISSION MEASUREMENTS ON UNITS 1 TO 6 FROM SMOKE STACKS ONE AND TWO AT KENDAL POWER STATION Herewith the report for the gaseous emission measurements carried out between the 17 th the 28 th of April Tests were carried out on Smoke stacks One and Two. These tests excluded Unit 3, which was on outage for a GO. Tests on Unit 3 were later carried out on the 26 th and 27 th of May We thank you for the opportunity to be of service and trust that your requirements have been interpreted correctly. If you have any queries, please contact us at the above numbers, we will gladly assist. Yours faithfully Inthuu Measurements CC CC Scheepers Page 1 of 96

2 INTHUU MEASUREMENTS CC Submitted by: Approved by: Signature:... MT Matlou (Project Leader) Signature:... CC Scheepers (Management) REPORT CUSTOMER : SICK AUTOMATION SOUTHERN AFRICA (PTY) LTD OPERATING COMPANY : KENDAL POWER STATION LOCATION : ON THE N12 NEAR OGIES IN MPUMALANGA TYPE OF MEASUREMENT : SO 2 STRATIFICATION AND PARALLEL MEASUREMENTS OF TITLE : GASEOUS EMISSION MEASUREMENTS ON UNITS 1 TO 6 FROM SMOKE STACKS 1 AND 2 AT KENDAL POWER STATION ORDER No s. : PO26492 and REPORT No. : 2015/06/24/RCCS234(1) REPORT DATE : 04 JULY 2016 COPYRIGHT ON THIS DOCUMENT IS RESERVED. PUBLICATION OR DISSEMINATION OF ITS CONTENTS WITHOUT WRITTEN PERMISSION IS NOT ALLOWED. Page 2 of 96

3 Index Page Index Summary Glossary 4 1. Measurement Objective 5 2. Plant Description and Materials Handled 5 3. Description of the Measurement Site 5 4. Measurement and Analytical Methods and Apparatus 6 5. Plant Operating Conditions during the Measurements 6 6. Presentation of Measurement Results and Discussion 7 Appendices A. Plant Parameters B. Homogeneity tests and best point C. Calibration Functions D. Monitor calibration certificates E. Reference gas and equipment calibration certificates Distribution list 96 Summary: Plant : Kendal Power Station Operating times : 24 hours Emission source : Power generation - fossil fuel boilers Measured components : SO 2, NO X, CO 2, O 2 Date of measurement (Series 1) : 17 April to 28 April 2015 Emission source No. : Flues No. 1, 2, 4, 5, 6 Date of measurement (Series 2) : 26 to 27 May 2016 Emission source No. : Flue No. 3 Measurement results : 1. The distribution of SO 2 is homogeneous in the stack of Unit 6 2. The monitors pass the variability test Plant Measured component Mean value [mg/nm 3 (d)] Maximum [mg/nm 3 (d)] Limit value [mg/nm 3 (d)] Unit 1 SO Unit 2 SO Unit 3 SO Unit 6 SO Page 3 of 96

4 GLOSSARY Some of the following abbreviations were used in the text, figures and Tables: AMS Automated Measurement System SRM Standard Reference Method CEM Continuous Emission Monitor ESP Electrostatic Precipitator FFP Fabric Filter Plant MCR Maximum Continuous Rating C Degrees Celsius Pa (g) Gauge pressure in Pascal kpa (abs) Absolute pressure in kilo Pascal % v/v Percentage on a Volume-by-Volume basis Am 3 Actual Cubic Metres Nm 3 Normal Cubic Metres Am 3 (w) Actual Cubic Metres on a wet basis Nm 3 (w) Normal Cubic Metres on a wet basis Am 3 (d) Actual Cubic Metres on a dry basis Nm 3 (d) Normal Cubic Metres on a dry basis ATPD Actual Temperature and Pressure Dry NTPD Normalised Temperature and Pressure - Dry g/s Grams per second mg/s Milligrams per second dp Differential pressure AO Analogue Output Actual refers to the measured temperature and pressure conditions of the gases in the duct. Normal or Standard refers to the actual conditions being normalised to 0 C and 101,325 kpa. Page 4 of 96

5 1 MEASUREMENT OBJECTIVE Kendal Power Station has installed Automated Measuring Systems (AMS) for the monitoring of gaseous emissions in compliance with the National Environmental Management: Air Quality Act, 2004 (Act No. 39 of 2004). The Installation was completed in March Inthuu Measurements CC was contracted by the supplier of the systems, Sick Automation Southern Africa (Pty) Ltd, to perform the stratification and parallel measurements. From the stratification measurements, it would be determined whether the distribution of the gases in the measurement plane is homogeneous, allowing parallel measurements from a single point on the grid or whether a full grid measurement would be required. It was decided by Eskom not to perform the stratification measurements prior to the installation, but rather install the monitors and thereafter find the most representative point from where the parallel measurements would take place. The procedure was to perform grid measurements, while using the installed AMS as the reference for the test for homogeneity. The most representative sampling point would be selected from stratification tests at three different conditions. 2 PLANT DESCRIPTION AND MATERIALS HANDLED The power station consists of six power generation units, each consisting of a steam driven turbine and a boiler supplying the steam. The boilers are specially designed to burn low grade coal, which contains high percentages of ash and sulphur. Each unit is equipped with particulate matter abatement technology. Kendal uses Electrostatic Precipitators (ESPs) to clean the boiler waste gases. The efficiency of the ESPs is enhanced by the implementation of SO 3 flue gas conditioning (SO 3 FGC). No further emission abatement technology is implemented at Kendal Power Station. 3 DESCRIPTION OF THE MEASUREMENT SITE The measuring site is located inside the multi-flue stack. The stack consists of a concrete outer windshield with three flues inside the windshield. The height of the 220m tall stack is divided into 8 levels, level 8 being the roof of the stack. Each level is a concrete slab through which the three flues enter from the bottom. The bottom flue fits into the flue above it without significant flow disturbance. The flue above each level is supported by that level. This arrangement allows for the expansion and contraction of the flue of one unit without being influenced by the other flues when one of the boilers is switched on or off. Expansion and contraction of the flues do not influence the level of the concrete floor. The ports are positioned at a height above the floor so that neither the ports nor the alignment of the instruments are influenced by the expansion and contraction Page 5 of 96

6 of the flue when a boiler is switched on or off. The alignment of the monitors is therefore very stable. The gaseous AMSs are positioned on the fifth level, while the particulate AMS is situated on the sixth level and measurements took place on the seventh level. 4 MEASUREMENT AND ANALYTICAL METHODS AND APPARATUS Compound Method Comment Velocity USEPA Method 2 Combustion gases: Horiba PG 250 Portable Gas Analyser O 2 Zirconium cell The analyser CO 2 NDIR calibration was CO NDIR verified before and SO 2 NDIR after the tests using NO x Chemiluminescence reference gases. Homogeneity BS EN 15259:2007 Report format BS EN 15259:2007 Correlation function BS EN 14181:2014 Variability test BS EN 14181: PLANT OPERATING CONDITION DURING THE MEASUREMENTS 5.1 PRODUCTION PLANT Normal operating conditions were maintained on all the units for the duration of the stratification tests. It was requested that soot blowing be carried out and completed, on each of the units under test, at a time before the start of the stratification tests. To ensure further stability of the combustion process and to ensure steady flow of gas through the stack, it was requested that the Automatic Group Control (AGC) and the Frequency Bias be switched off for the duration of the stratification tests. The tests were carried out at a condition which represents the normal state of power production. The coal which was burnt during the test period was the normal supply. The economiser outlet oxygen levels were representative of normal running excess air levels. Air ingress may be expected at the air heaters and the ESPs, but no abnormal ingress air was noticed from the O 2 readings in the stack. Additional operating data is tabulated in the Appendices. Page 6 of 96

7 The stratification tests were carried out at loads indicated in the table below. Unit Load [MW] Comment Normal operation Normal operation Normal operation Kendal reported that a power failure disturbed the AMS. Stratification and parallel tests were inconclusive Kendal reported that a power failure disturbed the AMS. Stratification and parallel tests were inconclusive Normal operation 5.2 WASTE GAS CLEANING UNITS Kendal Power Station employs Electrostatic Precipitators (ESPs) for gas cleaning in terms of particulate matter. No gaseous emission abatement is available. The ESPs were in service during the tests. SO 3 FGC plants are installed on each unit to improve the resistivity of the fly ash entering the ESPs for improved efficiency. The SO 3 FGC plants were in service during the tests. Boiler ashing and ESP de-dusting are continuous processes during normal operation and were fully operational during the tests. 6 PRESENTATION OF MEASUREMENT RESULTS AND DISCUSSION 6.1 EVALUATION OF THE OPERATING CONDITIONS DURING THE MEASUREMENTS It is an Eskom standard that the stratification tests are carried out at three different loads without soot blowing and oil support in each case. The recommended loads are: Highest possible load Lowest possible load without oil support A load midway between the highest and lowest possible loads As a matter of standard practice, permission had to be obtained from National Control to run the units off AGC and Frequency bias. Permission was not granted for any tests at reduced loads as there was a power shortage in South Africa at the time. Furthermore, no activities were allowed that could in any way whatsoever pose a trip risk. The power station was therefore in no position to comply with the requirements of the Eskom standards. No unusual operating occurrences were reported during the stratification tests. Page 7 of 96

8 6.2 MEASUREMENT RESULTS Stratification measurements information: Unit Homogeneity Most representative sampling point measured from the port hole flange 1 Inhomogeneous Traverse C at 1.08m 2 Inhomogeneous Traverse C at 3.12m 3 Inhomogeneous Traverse D at 3.06m Maximum SRM SO 2 [mg/nm 3 ] dry Minimum SRM SO 2 [mg/nm 3 ] dry 4 AMS readings not available. A power failure disturbed the AMS. 5 AMS readings not available. A power failure disturbed the AMS. 6 Homogeneous Traverse A at 1.061m Parallel measurement information: Average SRM SO 2 [mg/nm 3 ] dry Standard deviation SRM SO 2 [mg/nm 3 ] dry The correlation function was determined from the parallel measurements. The function yields the emission in ppm or in percentage at the AMS measured condition (for moisture and oxygen). It is the responsibility of the operating company to convert the AMS values (at actual measured conditions) to normalised conditions (given by the emissions license). This is done by using the AMS values for moisture and oxygen together with the formulas for each gas given in the Eskom Standard for Emission measurement and reporting. The tables below give a summary of the correlation function constants and statistical parameters obtained from the QAL2 procedures. Unit 1 Station Kendal Stack/Unit Unit 1 Parameter O₂ CO CO₂ SO₂ NO₂ Units % PPM % PPM PPM ELV (%) ELV (mg/nm3) Uncertainity (%) No of Tests Kv value SRM Max SRM Min Difference % of ELV Method A FALSE FALSE FALSE FALSE FALSE Method B TRUE TRUE TRUE TRUE TRUE Valid Calibration range Minimum Maximum Variability test Standard deviation The AMS Pass or fails the test Pass Pass Pass Pass Pass Uncertainty data m C Uncertainty (±) Page 8 of 96

9 Unit 2 Station Kendal Stack/Unit Unit 2 Parameter O₂ CO CO₂ SO₂ NO₂ Units % PPM % PPM PPM ELV (%) ELV (mg/nm3) Uncertainity (%) No of Tests Kv value SRM Max SRM Min Difference % of ELV Method A FALSE FALSE FALSE FALSE FALSE Method B TRUE TRUE TRUE TRUE TRUE Valid Calibration range Minimum Maximum Variability test Standard deviation The AMS Pass or fails the test Pass Pass Pass Pass Pass Uncertainty data m C Uncertainty (±) Unit 3 Station Kendal Stack/Unit 3 Parameter O₂ CO CO₂ SO₂ NO₂ Units % PPM % PPM PPM ELV (%) ELV (mg/nm3) Uncertainity (%) No of Tests Kv value SRM Max SRM Min Difference % of ELV Method A FALSE FALSE FALSE FALSE FALSE Method B TRUE TRUE TRUE TRUE TRUE Valid Calibration range Minimum Maximum Variability test Standard deviation The AMS Pass or fails the test Pass Pass Pass Pass Pass Uncertainty data m C Uncertainty (±) Page 9 of 96

10 Unit 6 Station Kendal Stack/Unit Unit 6 Parameter O₂ CO CO₂ SO₂ NO₂ Units % PPM % PPM PPM ELV (%) ELV (mg/nm3) Uncertainity (%) No of Tests Kv value SRM Max SRM Min Difference % of ELV Method A FALSE FALSE FALSE FALSE FALSE Method B TRUE TRUE TRUE TRUE TRUE Valid Calibration range Minimum Maximum Variability test Standard deviation The AMS Pass or fails the test Pass Pass Pass Pass Pass Uncertainty data m C Uncertainty (±) Detailed information is given in the Appendices: Appendix A Plant parameters Appendix B Test for homogeneity and the most representative sampling point Appendix C Calibration function Appendix D Monitor calibration certificates Appendix E Reference gas and equipment calibration certificates Appendix F Page 10 of 96

11 AMS readings during parallel measurements Unit 1 Test No. AMS Average AMS Average NO AMS Average CO AMS Average AMS Average AMS Average H2O SO 2 CO 2 O Further comments to the notes: Moisture - The AMS moisture readings were not available at the time of writing this report. As soon as those are received, the calculations will be repeated and updated in the report. The experience from the other units was that the AMS moisture was close to the SRM moistures and for the sake of compiling the report, the SRM moistures were used to perform the QAL2 calculations. The SRM moisture was only measured during the stratification tests, therefore a single value is repeated throughout the 15 tests. O 2 The standard requires that 90% of the readings must be available once zero check, span check and suspect readings were removed. The AMS for O 2 does not comply with this requirement. It is not clear whether the problem lies with the DCS receiving or sending the incorrect information. Erroneous readings range from negative values up to values which seemed credible in comparison with the SRM. In selecting the credible O 2 values for each test period, a comparison was made between the AMS O 2 and the station s excess air measurement (taken between the economiser outlet and the air heater inlets). All AMS values below the minimum air heater O 2 values were discarded. This will be unacceptable practice for the station to select data in this manner for day-to-day reporting. The erroneous readings must be investigated. Page 11 of 96

12 Unit 2 Test No. CEMS SO2 (GM32) CEMS NO (GM35) CEMS CO (GM35) CEMS CO2 (GM35) CEMS O2 (ZIRKOR) CEMS MOISTURE (GM35) Further comments to the notes: O 2 The standard requires that 90% of the readings must be available once zero check, span check and suspect readings were removed. The AMS for O 2 does not comply with this requirement. It is not clear whether the problem lies with the DCS receiving or sending the incorrect information. Erroneous readings range from negative values up to values which seemed credible in comparison with the SRM. In selecting the credible O 2 values for each test period, a comparison was made between the AMS O 2 and the station s excess air measurement (taken between the economiser outlet and the air heater inlets). All AMS values below the minimum air heater O 2 values were discarded. This will be unacceptable practice for the station to select data in this manner for day-to-day reporting. The erroneous readings must be investigated. Page 12 of 96

13 Unit 3 Test No. CEMS SO2 (GM32) PPM CEMS NO (GM35) PPM CEMS CO2 (GM35) % CEMS O2 (ZIRKOR) % CEMS CO (GM35) PPM CEMS MOISTURE (H2O) GM35 % Further comments to the notes: CO While the analyser is in good working condition, it has great uncertainty at zero. This leads to negative readings which can t be avoided when the boiler runs at high excess air. These negative readings were omitted in the correlation determination. Tests that include zero checks were also omitted. Unit 6 Test No. CEMS SO2 (GM32) CEMS NO (GM35) CEMS CO (GM35) CEMS CO2 (GM35) CEMS O2 (ZIRKOR) CEMS MOISTURE (GM35) AVE LH/RH O2 CONTENT Further comments to the notes: SO 2 and CO 2 - The values were not removed from the calculations for the homogeneity test and the correlation function. It was found that the exclusion of those tests didn t alter the correlation function. O 2 The standard requires that 90% of the readings must be available once zero check, span check and suspect readings were removed. The AMS for O 2 does not comply with this requirement. It is not clear whether the problem lies Page 13 of 96

14 with the DCS receiving or sending the incorrect information. Erroneous readings range from negative values up to values which seemed credible in comparison with the SRM. In selecting the credible O 2 values for each test period, a comparison was made between the AMS O 2 and the station s excess air measurement (taken between the economiser outlet and the air heater inlets). All AMS values below the minimum air heater O 2 values were discarded. This will be unacceptable practice for the station to select data in this manner for day-to-day reporting. The erroneous readings must be investigated. Page 14 of 96

15 APPENDIX A Plant Parameters Page 15 of 96

16 Unit 1 Plant parameters during stratification tests - Unit 1 Average Median Max Min STDEV STDEV as a percentage of the average Units Test period: 13h25 to 15h19 CEMS SO2 (GM32) 10HNE20CU001_XQ03 PPM CEMS NO (GM35) 10HNE20CU001_XQ01 PPM CEMS CO2 (GM35) 10HNE20CU002_XQ02 % CEMS O2 (ZIRKOR) 10HNE20CU004_XQ01 % CEMS VELOCITY (FLOWSIC) 10HNE20CU003_XQ01 m/s Blank Tagname GEN MW 10CJA00DU450_XU15 MW AVE LH/RH O2 CONTENT 10HNA81EQ121 % TOTAL COAL USAGE 10HFB81EQ007 kg/s LH SEC A/H GAS OUT T3 10HNA12CT003_XQ01 C LH SEC A/H GAS OUT T2 10HNA12CT002_XQ01 C LH SEC A/H GAS OUT T1 10HNA12CT001_XQ01 C RH PAH GAS OUTLET TEMP 1 10HNA23CT002_XQ01 C #DIV/0! RH PAH GAS OUTLET TEMP 2 10HNA23CT003_XQ01 C #DIV/0! RH PAH GAS OUTLET TEMP 3 10HNA23CT004_XQ01 C #DIV/0! RH SEC A/H GAS OUT T3 10HNA22CT003_XQ01 C RH SEC A/H GAS OUT T2 10HNA22CT002_XQ01 C RH SEC A/H GAS OUT T1 10HNA22CT001_XQ01 C Blank Tagname #DIV/0! TOT AIR FL 10HLB00CF901_ZQ02 kg/s FEED WATER DEMAND 10HAD60DL900_XT01 kg/s MILL A TOT FUEL FL 10HFE50DU500_XT01 % MILL B TOT FUEL FL 10HFE40DU500_XT01 % MILL C TOT FUEL FL 10HFE30DU500_XT01 % MILL D TOT FUEL FL 10HFE20DU500_XT01 % MILL E TOT FUEL FL 10HFE10DU500_XT01 % MEASURED FUEL OIL FLOW 10HJF00CF910_ZQ01 kg/hr FUEL OIL SUPPLY FLOW 10HJF00CF001_XQ01 kg/hr CEMS TEMP (GM32) 10HNE20CU001_XQ05 C CEMS MOISTURE (GM35) 10HNE20CU002_XQ03 % Notes: CO2 O2 Velocity Moisture A zero and span check took place once during the test period. The standard deviation is high due to the zero and span check (-0.36 and 17.22), but the readings were steady for the rest of the time. It was not removed to indicate the significance of the values. The standard deviation is high due to eratic behaviour of the AMS in comparison with the LH/RH O2 content. It was not removed to indicate the significance of the values. Less than 60% of the AMS readings are above the minimum LH/RH O2 content. A pattern for zero and span checks could not be identified. The standard deviation is high due to eratic behaviour of the AMS in comparison with the generated load and the total air flow. It was not removed to indicate the significance of the values. A pattern for zero and span checks could not be identified. A zero and span check took place once during the test period. The standard deviation is high due to the zero and span check during the test period (-0.59 and 16.98), but the readings were steady for the rest of the time. It was not removed to indicate the significance of the values. Page 16 of 96

17 Unit 2 Plant parameters during stratification tests - Unit 2 Average Median Max Min STDEV STDEV as a percentage of the average Units Test period: 17h28 to 19h11 CEMS SO2 (GM32) 20HNE20CU001_XQ03 PPM CEMS NO (GM35) 20HNE20CU001_XQ01 PPM CEMS CO2 (GM35) 20HNE20CU002_XQ02 % CEMS O2 (ZIRKOR) 20HNE20CU004_XQ01 % CEMS VELOCITY (FLOWSIC) 20HNE20CU003_XQ01 m/s Blank Tagname GEN MW 20CJA00DU450_XU15 MW AVE LH/RH O2 CONTENT 20HNA81EQ121 % TOTAL COAL USAGE 20HFB81EQ007 kg/s LH SEC A/H GAS OUT T3 20HNA12CT003_XQ01 C LH SEC A/H GAS OUT T2 20HNA12CT002_XQ01 C LH SEC A/H GAS OUT T1 20HNA12CT001_XQ01 C RH PAH GAS OUTLET TEMP 1 20HNA23CT002_XQ01 C RH PAH GAS OUTLET TEMP 2 20HNA23CT003_XQ01 C RH PAH GAS OUTLET TEMP 3 20HNA23CT004_XQ01 C #DIV/0! RH SEC A/H GAS OUT T3 20HNA22CT003_XQ01 C RH SEC A/H GAS OUT T2 20HNA22CT002_XQ01 C RH SEC A/H GAS OUT T1 20HNA22CT001_XQ01 C Blank Tagname #DIV/0! TOT AIR FL 20HLB00CF901_ZQ02 kg/s FEED WATER DEMAND 20HAD60DL900_XT01 kg/s MILL A TOT FUEL FL 20HFE50DU500_XT01 % MILL B TOT FUEL FL 20HFE40DU500_XT01 % MILL C TOT FUEL FL 20HFE30DU500_XT01 % MILL D TOT FUEL FL 20HFE20DU500_XT01 % MILL E TOT FUEL FL 20HFE10DU500_XT01 % MEASURED FUEL OIL FLOW 20HJF00CF910_ZQ01 kg/hr FUEL OIL SUPPLY FLOW 20HJF00CF001_XQ01 kg/hr CEMS TEMP (GM32) 20HNE20CU001_XQ05 C CEMS MOISTURE (GM35) 20HNE20CU002_XQ03 % Notes: CO2 O2 Velocity Moisture A zero and span check took place once during the test period. The standard deviation is high due to the zero and span check (-1.40 and 16.48), but the readings were steady for the rest of the time. It was not removed to indicate the significance of the values. The standard deviation is high due to eratic behaviour of the AMS in comparison with the LH/RH O2 content. It was not removed to indicate the significance of the values. More than 25 % of the readings showed "Bad input". Including the bad inputs, less than 60% of the AMS readings are above the minimum LH/RH O2 content. A pattern for zero and span The standard deviation is high due to eratic behaviour of the AMS in comparison with the generated load and the total air flow. It was not removed to indicate the significance of the values. A pattern for zero and span checks could not be identified. A zero and span check took place once during the test period. The standard deviation is high due to the zero and span check during the test period (-1.44 and 16.35), but the readings were steady for the rest of the time. It was not removed to indicate the significance of the values. Page 17 of 96

18 Unit /05/26 Plant Parameters during Test 2 Stratification test- Unit 3 Average Median Maximum Minimum Standard Deviation Description and units Signal Name Test Period: 13H46 to 19H15 CEMS SO2 (GM32) PPM 30HNE20CU001_XQ CEMS NO (GM35) PPM 30HNE20CU001_XQ CEMS CO2 (GM35) % 30HNE20CU002_XQ CEMS O2 (ZIRKOR) % 30HNE20CU004_XQ CEMS VELOCITY (FLOWSIC) M/S 30HNE20CU003_XQ GEN MW 30CJA00DU450_XU AVE LH/RH O2 CONTENT 30HNA81EQ TOTAL COAL USAGE 30HFB81EQ LH SEC A/H GAS OUT T3 30HNA12CT003_XQ LH SEC A/H GAS OUT T2 30HNA12CT002_XQ LH SEC A/H GAS OUT T1 30HNA12CT001_XQ RH PAH GAS OUTLET TEMP 1 30HNA23CT002_XQ RH PAH GAS OUTLET TEMP 2 30HNA23CT003_XQ RH PAH GAS OUTLET TEMP 3 30HNA23CT004_XQ RH SEC A/H GAS OUT T3 30HNA22CT003_XQ RH SEC A/H GAS OUT T2 30HNA22CT002_XQ RH SEC A/H GAS OUT T1 30HNA22CT001_XQ TOT AIR FL 30HLB00CF901_ZQ FEED WATER DEMAND 30HAD60DL900_XT MILL A TOT FUEL FL 30HFE50DU500_XT MILL B TOT FUEL FL 30HFE40DU500_XT MILL C TOT FUEL FL 30HFE30DU500_XT MILL D TOT FUEL FL 30HFE20DU500_XT MILL E TOT FUEL FL 30HFE10DU500_XT MEASURED FUEL OIL FLOW 30HJF00CF910_ZQ FUEL OIL SUPPLY FLOW 30HJF00CF001_XQ CEMS PRESSURE (GM32) KPA 30HNE20CU001_XQ CEMS TEMPERATURE (GM32) DegC 30HNE20CU001_XQ CEMS CO (GM35) PPM 30HNE20CU002_XQ CEMS MOISTURE (H2O) GM35 % 30HNE20CU002_XQ Notes: STDEV As a percentage of the average CO2 Nothing out of the ordinary to report O2 Velocity Moisture Nothing out of the ordinary to report To improve on the stability of the gas flow, the Unit may be selected to run in "Turbine follow" mode. The feedwater flow is therefore the setpoint, ensuring more stability. Nothing out of the ordinary to report Page 18 of 96

19 Unit 4 Plant parameters during stratification tests - Unit 4 Average Median Max Min STDEV STDEV as a percentage of the average Units Test period: 17h00 to 18h00 CEMS SO2 (GM32) 40HNE20CU001_XQ03 PPM CEMS NO (GM35) 40HNE20CU001_XQ01 PPM CEMS CO2 (GM35) 40HNE20CU002_XQ02 % CEMS O2 (ZIRKOR) 40HNE20CU004_XQ01 % CEMS VELOCITY (FLOWSIC) 40HNE20CU003_XQ01 m/s #DIV/0! #NUM! #DIV/0! #DIV/0! Blank Tagname GEN MW 40CJA00DU450_XU15 MW AVE LH/RH O2 CONTENT 40HNA81EQ121 % #DIV/0! #NUM! #DIV/0! #DIV/0! TOTAL COAL USAGE 40HFB81EQ007 kg/s LH SEC A/H GAS OUT T3 40HNA12CT003_XQ01 C LH SEC A/H GAS OUT T2 40HNA12CT002_XQ01 C LH SEC A/H GAS OUT T1 40HNA12CT001_XQ01 C RH PAH GAS OUTLET TEMP 1 40HNA23CT002_XQ01 C #DIV/0! #NUM! #DIV/0! RH PAH GAS OUTLET TEMP 2 40HNA23CT003_XQ01 C #DIV/0! #NUM! #DIV/0! RH PAH GAS OUTLET TEMP 3 40HNA23CT004_XQ01 C #DIV/0! #NUM! #DIV/0! RH SEC A/H GAS OUT T3 40HNA22CT003_XQ01 C RH SEC A/H GAS OUT T2 40HNA22CT002_XQ01 C RH SEC A/H GAS OUT T1 40HNA22CT001_XQ01 C Blank Tagname #DIV/0! #NUM! #DIV/0! TOT AIR FL 40HLB00CF901_ZQ02 kg/s FEED WATER DEMAND 40HAD60DL900_XT01 kg/s MILL A TOT FUEL FL 40HFE50DU500_XT01 % MILL B TOT FUEL FL 40HFE40DU500_XT01 % MILL C TOT FUEL FL 40HFE30DU500_XT01 % MILL D TOT FUEL FL 40HFE20DU500_XT01 % MILL E TOT FUEL FL 40HFE10DU500_XT01 % MEASURED FUEL OIL FLOW 40HJF00CF910_ZQ01 kg/hr FUEL OIL SUPPLY FLOW 40HJF00CF001_XQ01 kg/hr Notes: SO2 Kendal reported that a power failure disturbed the AMS and the information could not be used for the stratification tests. NO Kendal reported that a power failure disturbed the AMS and the information could not be used for the stratification tests. CO2 Kendal reported that a power failure disturbed the AMS and the information could not be used for the stratification tests. O2 Kendal reported that a power failure disturbed the AMS and the information could not be used for the stratification tests. Velocity All the readings recorded showed "Bad Input". Kendal reported that a power failure disturbed the AMS and the information could not be used for the stratification tests. Temperature The temperature was not included in the data supplied. Moisture The temperature was not included in the data supplied. Page 19 of 96

20 Unit 5 Plant parameters during stratification tests - Unit 5 Average Median Max Min STDEV STDEV as a percentage of the average Units Test period: 17h00 to 18h00 CEMS SO2 (GM32) 50HNE20CU001_XQ03 PPM CEMS NO (GM35) 50HNE20CU001_XQ01 PPM CEMS CO2 (GM35) 50HNE20CU002_XQ02 % CEMS O2 (ZIRKOR) 50HNE20CU004_XQ01 % #DIV/0! #NUM! #DIV/0! #DIV/0! CEMS VELOCITY (FLOWSIC) 50HNE20CU003_XQ01 m/s Blank Tagname #DIV/0! #NUM! #DIV/0! GEN MW 50CJA00DU450_XU15 MW AVE LH/RH O2 CONTENT 50HNA81EQ121 % TOTAL COAL USAGE 50HFB81EQ007 kg/s LH SEC A/H GAS OUT T3 50HNA12CT003_XQ01 C LH SEC A/H GAS OUT T2 50HNA12CT002_XQ01 C LH SEC A/H GAS OUT T1 50HNA12CT001_XQ01 C RH PAH GAS OUTLET TEMP 1 50HNA23CT002_XQ01 C #DIV/0! #NUM! #DIV/0! RH PAH GAS OUTLET TEMP 2 50HNA23CT003_XQ01 C #DIV/0! #NUM! #DIV/0! RH PAH GAS OUTLET TEMP 3 50HNA23CT004_XQ01 C #DIV/0! #NUM! #DIV/0! RH SEC A/H GAS OUT T3 50HNA22CT003_XQ01 C RH SEC A/H GAS OUT T2 50HNA22CT002_XQ01 C RH SEC A/H GAS OUT T1 50HNA22CT001_XQ01 C Blank Tagname #DIV/0! #NUM! #DIV/0! TOT AIR FL 50HLB00CF901_ZQ02 kg/s FEED WATER DEMAND 50HAD60DL900_XT01 kg/s MILL A TOT FUEL FL 50HFE50DU500_XT01 % MILL B TOT FUEL FL 50HFE40DU500_XT01 % MILL C TOT FUEL FL 50HFE30DU500_XT01 % MILL D TOT FUEL FL 50HFE20DU500_XT01 % MILL E TOT FUEL FL 50HFE10DU500_XT01 % MEASURED FUEL OIL FLOW 50HJF00CF910_ZQ01 kg/hr FUEL OIL SUPPLY FLOW 50HJF00CF001_XQ01 kg/hr Notes: SO2 Kendal reported that a power failure disturbed the AMS and the information could not be used for the stratification tests. NO Kendal reported that a power failure disturbed the AMS and the information could not be used for the stratification tests. CO2 Kendal reported that a power failure disturbed the AMS and the information could not be used for the stratification tests. O2 Velocity Temperature All the readings recorded showed "Bad Input". Kendal reported that a power failure disturbed the AMS and the information could not be used for the stratification tests. The standard deviation is high due to eratic behaviour of the AMS in comparison with the generated load and the total air flow. It was not removed to indicate the significance of the values. A pattern for zero and span checks could not be identified. The temperature was not included in the data supplied. Moisture The temperature was not included in the data supplied. Page 20 of 96

21 Unit 6 Plant parameters during stratification tests - Unit 6 Average Median Max Min STDEV STDEV as a percentage of the average Units Test period: 17h28 to 19h11 CEMS SO2 (GM32) 60HNE20CU001_XQ03 PPM CEMS NO (GM35) 60HNE20CU001_XQ01 PPM CEMS CO2 (GM35) 60HNE20CU002_XQ02 % CEMS O2 (ZIRKOR) 60HNE20CU004_XQ01 % CEMS VELOCITY (FLOWSIC) 60HNE20CU003_XQ01 m/s Blank Tagname #DIV/0! #NUM! #DIV/0! GEN MW 60CJA00DU450_XU15 MW AVE LH/RH O2 CONTENT 60HNA81EQ121 % TOTAL COAL USAGE 60HFB81EQ007 kg/s LH SEC A/H GAS OUT T3 60HNA12CT003_XQ01 C LH SEC A/H GAS OUT T2 60HNA12CT002_XQ01 C LH SEC A/H GAS OUT T1 60HNA12CT001_XQ01 C RH PAH GAS OUTLET TEMP 1 60HNA23CT002_XQ01 C RH PAH GAS OUTLET TEMP 2 60HNA23CT003_XQ01 C RH PAH GAS OUTLET TEMP 3 60HNA23CT004_XQ01 C #DIV/0! #NUM! #DIV/0! RH SEC A/H GAS OUT T3 60HNA22CT003_XQ01 C RH SEC A/H GAS OUT T2 60HNA22CT002_XQ01 C RH SEC A/H GAS OUT T1 60HNA22CT001_XQ01 C Blank Tagname #DIV/0! #NUM! #DIV/0! TOT AIR FL 60HLB00CF901_ZQ02 kg/s FEED WATER DEMAND 60HAD60DL900_XT01 kg/s MILL A TOT FUEL FL 60HFE50DU500_XT01 % MILL B TOT FUEL FL 60HFE40DU500_XT01 % MILL C TOT FUEL FL 60HFE30DU500_XT01 % MILL D TOT FUEL FL 60HFE20DU500_XT01 % MILL E TOT FUEL FL 60HFE10DU500_XT01 % #DIV/0! MEASURED FUEL OIL FLOW 60HJF00CF910_ZQ01 kg/hr FUEL OIL SUPPLY FLOW 60HJF00CF001_XQ01 kg/hr CEMS TEMP (GM32) 60HNE20CU001_XQ05 C CEMS MOISTURE (GM35) 60HNE20CU002_XQ03 % Notes: CO2 O2 Moisture A zero and span check took place once during the test period. The standard deviation is high due to the zero and span check (-1.19 and 16.38), but the readings were steady for the rest of the time. It was not removed to indicate the significance of the values. The standard deviation is high due to eratic behaviour of the AMS in comparison with the LH/RH O2 content. It was not removed to indicate the significance of the values. More than 25 % of the readings showed "Bad input". Including the bad inputs, less than 60% of the AMS readings are above the minimum LH/RH O2 content. A pattern for zero and span checks could not be identified. A zero and span check took place once during the test period. The standard deviation is high due to the zero and span check during the test period (-0.85 and 16.80), but the readings were steady for the rest of the time. It was not removed to indicate the significance of the values. Page 21 of 96

22 APPENDIX B Test for homogeneity Test for the most representative sampling point Page 22 of 96

23 Homogeneity using SO 2 - Unit 1 Axis - depth c grid c ref c grid / c ref [m] [mg/nm 3 (d)] [mg/nm 3 (d)] [%] Traverse A Traverse B Traverse C Mean value s grid Standard deviation Number of measurements 15 Degrees of freedom 14 Homogeneity test: Test value F = (s grid / s ref ) F 95% 2.48 Test: s grid < s ref Test if F F 95% or s grid <s ref Waste gas s ref No FALSE Inhomogeneous Standard deviation of time s ref 28.7 Standard deviation of position s pos 56.8 Permissible expanded uncertainty U perm [mg/m 3 ] 100 t N-1; U pos [mg/m 3 ] * Uperm = 13.2 U pos 0.5 * U perm No Required measurement type Grid Representative measurement point Traverse C at 1.08m c grid / c ref at representative measurement point Page 23 of 96

24 Homogeneity using SO 2 - Unit 2 c grid c ref c grid / c ref [m] [mg/nm 3 (d)] [mg/nm 3 (d)] [%] Traverse A Traverse B Traverse C Mean value Standard deviation Number of measurements 15 Degrees of freedom 14 Homogeneity test: F 95% 2.48 Test: s grid < s ref Axis - depth Test value F = (s grid / s ref ) Test if F F 95% or s grid <s ref Waste gas Permissible expanded uncertainty U perm [mg/m 3 ] 100 t N-1; U pos [mg/m 3 ] * Uperm = U pos 0.5 * U perm No Required measurement type Grid Representative measurement point Traverse C at 3.12m c grid / c ref at representative measurement point s grid s ref Inhomogeneous Standard deviation of time s ref 75.6 Standard deviation of position s pos No FALSE Page 24 of 96

25 Homogeneity using SO 2 - Unit 3 Axis - depth c grid c ref c grid / c ref [m] [PPM] [PPM] [%] Traverse A Traverse B Traverse C Traverse D Mean value Standard deviation Number of measurements 20 Degrees of freedom 19 Homogeneity test: Test value F = (s grid / s ref ) F 95% 2.17 Test: s grid < s ref Test if F F 95% or s grid <s ref Waste gas s grid s ref No FALSE Inhomogeneous Standard deviation of time s ref 6.0 Standard deviation of position s pos 27.7 Permissible expanded uncertainty U perm [mg/m 3 ] 100 t N-1; U pos [mg/m 3 ] * Uperm = 6.63 U pos 0.5 * U perm No Required measurement type Grid Representative measurement point Traverse D at 3.06m Page 25 of 96

26 Homogeneity using SO 2 - Unit 6 Axis - depth c grid c ref c grid / c ref [m] [mg/nm 3 (d)] [mg/nm 3 (d)] [%] Traverse A Traverse B Traverse C Mean value Standard deviation Number of measurements 15 Degrees of freedom 14 Homogeneity test: Test value F = (s grid / s ref ) F 95% 2.48 Test: s grid < s ref Test if F F 95% or s grid <s ref Waste gas s grid s ref Homogeneous Standard deviation of time s ref - Standard deviation of position s pos - Permissible expanded uncertainty U perm [mg/m 3 ] 100 t N-1; U pos [mg/m 3 ] 0.5 * Uperm = U pos 0.5 * U perm Required measurement type Representative measurement point Single point Any point c grid / c ref at representative measurement point - Yes TRUE - - Yes Page 26 of 96

27 Best point - Unit 1 SO 2 Temperature Velocity Axis - depth Info profile c grid c ref o grid o ref T grid T ref ʋ grid ʋ ref F rep 1 [m] [mg/m 3 ] [mg/m 3 ] [%] abs (deviation) Traverse A Traverse B Traverse C Mean value Smallest difference 0.03 Best available sampling point Traverse C at 1.08m F rep at best available sampling point Ratio of measured valueat best available sampling point to mean value of all grid measurements for: [%] SO O Temperature Velocity Oxygen content Page 27 of 96

28 Best point - Unit 2 Axis - depth c grid c ref o grid o ref T grid T ref ʋ grid ʋ ref F rep Info profile 1 [m] [mg/m 3 ] [mg/m 3 ] [%] abs (deviation) Traverse A Traverse B Traverse C Mean value Smallest difference 0.00 Ratio of measured valueat best available sampling point to mean value of all grid measurements for: SO 2 Best available sampling point Traverse C at 3.12m F rep at best available sampling point 94.7 SO O Temperature Velocity 97.3 [%] Oxygen content Temperature Velocity Page 28 of 96

29 Best point - Unit 3 SO 2 Temperature Axis - depth c grid c ref o grid o ref T grid T ref ʋ grid ʋ ref F rep Info profile 1 [m] [PPM] [PPM] [%] abs (deviation) Traverse A Traverse B Traverse C Traverse D Mean value Smallest difference 0.00 Best available sampling point Traverse D at 3.06m F rep at best available sampling point Ratio of measured valueat best available sampling point to mean value of all grid measurements for: SO O Temperature Velocity [%] Oxygen content Velocity Page 29 of 96