1. High pressure gas flow system operation at CPC 1 Jen-Tsung Luo, Ph.D, Researcher Chinese Petroleum Corporation(CPC) Refining&Manufacture Research Institute 2013.11.22

2. Outline Introduction of RMRI gas flow calibration Laboratory Calibration operation –Calibration system –Calibration method –Calibration check –Measurement uncertainty NG business flowmeter calibration Datan Power Plant Flowmeter calibration Summary 2

3. RMRI Gas Flow Calibration Laboratory 3 RMRI/CPC gas flow calibration system is a high pressure gas with cycle flow system Chiayi Taipei 260 km CPC RMRI

4. Capacity of International Flow Laboratory 4

5. 5 Goal Establish Taiwan high pressure air flow calibration center for NG measurement, and enhance the efficiency of NG piping and transportation. Establish air flowmeter measurement technology of CPC. Get international certification and join international Laboratory test. Capacity: C area Range: 80-4000m 3 /h, Flowmeter Size:6 to 12 inch, Pressure range:10-60 bar Uncertainty: 0.30% RMRI Gas Flow Calibration Laboratory

6. 6 The Role of RMRI Gas Flow Calibration Laboratory Core Technology  Air flow field research  Enhance calibration accuracy  Simulation of NG piping and transportation RMRI Laboratory CPC  Flowmeter Calibration  Technical service  Business 220billion(NTD) NG power plant  Taiwan Power  IPP Power plant  Other Customer 2013 Result  Finished 21 USMs calibration for business measure  The average error is 0.24%  TAF Accreditation Lab.  Increase calibration ability  Measurement technology  Proficiency Test 21 Business Flowmeters ITRI Third party

7. 7 Ice cooler Air Tank Blower Air Flow Closed Cycle Loop A Area B Area C Area Calibration System

8. 8 C Area Calibration System 6“ PI-5306 TE-5311 TE-5312 6“ 5301 5302 5303 5304 TE-5301 TE-5302 TE-5303 TE-5304 TE-5305 TE-5306 TE-5307 TE-5308 PI-5301 PI-5302 PI-5303 PI-5304 FI5301 FQ5301 FI5302 FQ5302 FI5303 FQ5303 FI5304 FQ5304 8“ TE-5313 TE-5314 TE-5315 TE-5316 10“ TE-5317 TE-5318 TE-5319 TE-5320 12“ 5306 PI-5306 TE-5321 TE-5322 TE-5323 TE-5324 FI5306 FQ5306 TE-5325 TE-5327 TE-5329 TE-5332 TE-5331 TE-5326 TE-5328 TE-5330 FI5311 FQ5311 FI5312 FQ5312 FI5313 FQ5313 FI5314 FQ5314 PI-5311 PI-5312 PI-5313 PI-5314 Standard Meter: 6” USM Checking Meter: 6” Turbine meter Meter under Test: With pulse output

9. Standard Meter for Laboratory 9 AreaStandard MeterMeter under Test (inch) pressureFlow rate range AInstromet 4 inch IRPP meter 234234 10-60 bar20~600 m 3 /h BInstromet 4 inch Turbine meter 4646 10-60 bar35~1000 m 3 /h CInstromet 6 inch USM 6 8 10 12 10-60 bar80~4000 m 3 /h

10. Other instrument 10 InstrumentTypeNote Blower (small) Flow rate: (40 ~ 600) m 3 /hr  Pressure difference ： 4.42 bar OP. temperature ： (5 ~ 40) ℃ Speed ： (300 ~ 5000) rpm Frequency ： 0 ～ 60 Hz Howden/W-DF280MF-D Blower (Large) Flow rate: (100 ~ 1700) m 3 /hr  Pressure difference ： 4.42 bar OP. temperature ： (5 ~ 40) ℃ Speed ： (300 ~ 4500) rpm Frequency ： 0 ～ 60 Hz Howden/ W-DF315L-D RTD Temperature Range: (0 ~ 50) ℃ PT 1000 Ω class A 級 Sensor Dia. ： 3mm 與 PLC 之溫度訊號擷取模組搭配使用 Absolute Pressure Range ： (0 ~ 68) bar Ruska/7250xi Ruska/7215xi Ruska/7050xi DHI/RPm4

11. Laboratory Standard Traceability 11 NML Gas Flow Laboratory NML Temperature Laboratory NML Pressure Laboratory CPC Gas Flow Calibration Laboratory System (80 ~ 4000) m 3 /h@(10 ~ 60) bar (80 ~ 1000) m 3 /h@(10 ~ 60) bar Transfer Standard 6”USM 6”Turbine Meter Temperature (18 ~ 22) ℃ Absolute Pressure (10 ~ 60) bar Flowmeter RTD temperature Pressure

12. 12 Pressure Calibration System RTD Calibration System Calibrate Temperature and Tressure meter Standard Check Test Isothermal Tank Pressure Tank Standard Check Test

13. Instrument Control Diagram 13

14. DCS Control System 14 DI/DO AI/AO Pressure, Blower Temperature Instrument

15. Calibration method (Comparison) 15 E R = (V m –V s )/V s = V m /V s –1 Conservation of Mass Meter to base situation 6” V s1, P s1, T s1 V s2, P s2, T s2 Volume of test meter 6”,8”,10”,12” V m, P m, T m

16. Check for Calibration result 16 Checking curve QF5301QF5302QF5303QF5304 Pressure CL UCLLCL CL UCLLCL CL UCLLCL CL UCLLCL 10 bar-1.4E-161.2E-01-1.2E-012.9E-161.7E-01-1.7E-01-2.5E-167.5E-02-7.5E-020.0E+002.0E-01-2.0E-01 20 bar-3.0E-161.1E-01-1.1E-017.3E-161.6E-01-1.6E-01-4.3E-169.2E-02-9.2E-02-1.5E-151.6E-01-1.6E-01 30bar-2.0E-151.3E-01-1.3E-014.8E-161.5E-01-1.5E-017.3E-161.7E-01-1.7E-011.9E-152.7E-01-2.7E-01 50bar-2.9E-161.1E-01-1.1E-011.9E-171.0E-01-1.0E-011.8E-161.2E-01-1.2E-01-5.5E-163.2E-01-3.2E-01 1.Establish 25 cal. curves 2.Calculate regression curve Y=ax 3 +bx 2 +cx+d 3.Find CL 、 UCL 、 LCL UCL=CL+3Stdev. LCL=CL-3Stdev. V s1, P s1, T s1 V c1, P c1, T c1 6’’ Standard meter (USM) 6’’ Checking meter (Turbine)

17. Measurement Uncertainty Evaluation 17 Pulse of calibration meter Pulse of calibration meter K factor of meter Pulse of Standard meter Pulse of Standard meter Pressure compensation factor Pressure compensation factor Temperature compensation factor Uncertainty

18. Measurement Uncertainty 18 xi xi Measure Variability Error source Type Standard Uncertainity u(x i ) Sensitivity c xi |c i  u(x i )| freedom i NmNm Pulse of calibrated Meter Count error Rect. 0.577 pulse 0.0001 pulse -1 0.00006  NsNs Pulse of Standard Meter Count error Rect. 0.577 pulse -0.0001 pulse -1 0.00006  Ks Ks K factor of standard meter Flowmeter calibration Variability of repeatability Variability of different pressure Regression function for k Long term variability Norm. Rect. 11.43 pulses/m 3 7.28 pulses/m 3 6.35 pulses/m 3 0 pulses/m 3 4.62 pulses/m 3 3.2 pulses/m 3 0.000125 m 3 /pulses 0.0014 435 CP CP Pressure compensation factor Pressure Calibration Variability of pressure change Rect. 0.00042 0.00023 0.00035 0.00042  CT CT Temperature compensation factor Temperature Calibration Variability of Temperature change Rect 0.00036 0.00006 0.00035 10.00036 

19. 19 2013 Proficiency Testing: RMRI/CPC and NML/ITRI NML/ITRI RMRI/CPC Proficiency Testing Purpose: Evaluate laboratory’s calibration proficiency Situation: for outside audit Judge: En<1 Testing Meter 6”, Instromet/SM-RI-X/73582

20. 20 Check the pulse of flowmeter Procedure of Calibration 1. Flowmeter Receive and Check 2. pipe clean and installation

21. 21 3 、 pressure and leakage test(10-60 bar) 4 、 Flowmeter Calibrate Procedure for Calibration

22. 22 5 、 Data analysis 6 、 Calibration report Procedure for Calibration

23. 23 LNG Receive stations(2) Power Plants(11) Datan NG Power Plant Taiwan Nature Gas(NG) supply for power plants Taichung LNG Receive stations Yong'an LNG Receive stations

24. Why use Ultrasonic Flow Meter for NG business measure 24 Since 2009, The measurement of NG supply for Taiwan power plant has replaced orifice plate with multi path ultrasonic flowmeters (10”, 12”,24”) The error is from 2% to less than 0.5% The advantage of USM Accuracy: Can be calibrated to <0.1%. Large Turndown: >80:1 Calibration is available Bi-directional: Measures volumes in both directions with comparable performance. Tolerant of Wet Gas: Important for production applications. Low Maintenance: No moving parts means reduced maintenance, minimal pressure drop, and diagnose a meter’s health is available.

25. 10” USM long-term observation Flowmetrer Type /Serial No.: 4 path USM, Instromet QC-10034-2RF Calibrate the meter 5 time during 1.3 year, and the adjust factor is 0.9935 It showed that the error is 0.09%~ -0.41% as flowrate aboe500 m 3 /h 25 1 st Calibration Nb. ： C2201109010 ， Date ： 2011/9/16 2 nd Calibration Nb. ： C2201112007 ， Date ： 2011/12/27 3 rd Calibration Nb. ： C220120301 ， Date ： 2012/3/9 4 th Calibration Nb. ： C220120504 ， Date ： 2012/5/25 5 th Calibration Nb. ： C220121001 ， Date ： 2012/10/15 Adjust Factor:0.9935 Instromet 10’’, 4 path USM Adjust Factor:1

26. 12” USM long-term observation 26 1 st Calibration Nb. ： C2201109013 ， Date ： 2011/9/26 2 nd Calibration Nb. ： C2201201001 ， Date ： 2012/01/06 3 rd Calibration Nb. ： C220120303 ， Date ： 2012/3/15 4 th Calibration Nb. ： C220120610 ， Date ： 2012/6/21 5 th Calibration Nb. ： C220121005 ， Date ： 2012/10/24 Adjust Factor:1.0040 Instromet 12’’, 4 path USM Adjust Factor:1 Flowmetrer Type /Serial No.: 4 path USM, Instromet QC-12034-2RF Calibrate the meter 5 time during 1.3 year, and the adjust factor is 1.0040 It showed that the error is 0.1%~ -0.4% as flowrate aboe500 m 3 /h

27. Datan Power plant Flowmeter calibration 27 Largest NG power plant in Taiwan 24” USM business flowmeters 4 business 2 check Calibration system in Datan Datan Power Plant

28. 28 Datan Power Plant Flowmeter Traceability CMS/ITRI Primary Standard ： Sony nozzle array to calibrate 6” USM power plant metering station RMRI/CPC RMRI/CPC Transfer Standard ： 6” USM(4) parallel to calibrate 12” SICK USM (4) Datan N.G. Power Station Calibration 12” USM(4) parallel to calibrate 24” Daniel USM (6) CPC TPC 24” Daniel USM (4, measure) 12” SICK USM (4, transfer Standard) U=0.32% CMS/ITRI 24” Daniel USM (4, check) U=0.30% U=0.18%

29. 29 Gyroscopic Weighing System& Sonic nozzle array NML/ITRI Flow:10-1000m 3 /h, Temperature:-50~300 ℃ Pressure:1~1000kPa Datan SICK 12”Transfer Standards x4 Flow:500-4000m 3 /h Temperature:18~22 ℃ Pressure:20-60 bar RMRI/CPC Instromet 6”Transfer Standards x4 Flow:80-4000m 3 /h Temperature:18~22 ℃ Pressure:10-60 bar Datan Daniel 24” Measure and check Meter Flow:500-16000m 3 /h Temperature:5~40 ℃ Pressure:20-60 bar Datan Power Plant Transfer Standard Traceability

30. The 12 inch transfer standards had a similar calibration curve during 3 year’s observation 30 2012 2010 2011 SICK 12” USM transfer standard calibration result

31. 31 The error after calibration is below ±0.2% which is the contract limit and it showed the meter is in a stable situation during 3years. Daniel 24” USM Business meter calibration result

32. Summary 32  RMRI gas flow calibration laboratory is a high pressure air system with the largest capacity in Taiwan. Measurement uncertainty is from 0.4% to 0.3% since 2010 TAF audit. We will continue to maintain the reliability of Laboratory  In Taiwan, 82% of NG was supplied for electrical power, and the business is about 22 billion NTD; to calibrate and increase the accuracy of flowmeter is important.  Business flowmeter needs to be calibrated within 2 years, otherwise the accuracy will decay.  The businee NG flowmeter were calibrated sine 2011-2012, the average error is 0.24%

33. 33 Thank you For your attention 謝 謝 謝 謝