1. High pressure gas flow calibration facility at CMS Jiunn-Haur Shaw Center for Measurement Standards/ITRI, Taiwan 2013 APMP TCFF Workshop, Taipei, Taiwan November 22-23, 2013

2. Copyright 2013 ITRI 工業技術研究院 22 Outline Natural Gas Calibration Infrastructure Calibration Facilities at CMS Thermal effect and some Test Results Observation & Current Progress

3. Copyright 2013 ITRI 工業技術研究院 3 LNG import 20% Household 80% 12 PowerGen Transmission and Distribution Pipeline custody transfer meters (DN250 to DN600) -Total Pipe Length: 1,892KM -Natural Gas 2.5 folds increase in 10 years -Total of 12 TP & IPP power plants -Total NG usage over 15BM3

4. Copyright 2013 ITRI 工業技術研究院 Establishment of a National High-Pressure Natural Gas Flow Measurement Infrastructure Needs: On-site metrological control of large capacity NG measurement instruments in a Power Plant Approach:(1) Establish QS & physical traceability chain with national standard through transfer standards (TS) calibrated in CMS to attain global equivalence under CIPM MRA scheme (2) Combine 2-3 standard meters to cascade up flow capacity through un-broken chain of calibration (3) On-site comparison and control check of 600mm ultrasonic custody transfer meters (USM) Benefits: (1) Assure quality control and measurement accuracy for energy transaction between Chinese Petroleum Corp (CPC) and Taiwan Power Company (Tai Power); (53 bars operation pressure, 1.65 MM tons/yr) (2) Through the dissemination of national standard to on-site calibration with proper QS implementation, NML contributes to the reduction of global warming equivalent to CO2 emission of 4 MM tons/yr Re-circulating HP system 4000 m 3 /h @(10 to 60) bar U = 0.45 % Weighing + Nozzle (15-18000) m 3 /h U = 0.18 %, 60bars CMS High Pressure Air Flow Facility, participated CIPM.FF-K5b CPC High Pressure Air Flow Facility (a Partner Laboratory of NML) On-site practice @ Taiwan Power metering station Four 300 mm USM TS in parallel

5. Copyright 2013 ITRI 工業技術研究院 ++ NML 6 " USM Standard Pressure Gauge Standard Temperature Gauge High pressure Air flow Calibration System Temperature Calibration System Pressure Calibration System Calibration on Standard Meters in NML ++ 12 " USM Pressure GaugeTemperature Gauge CPC Secondary High pressure Air flow Calibration System NML Temperature Calibration System NML Pressure Calibration System Calibration on Standard Meters in CPC Secondary Facility CPC 12"USM NML Temperature Calibration System NML Pressure Calibration System ++ Pressure GaugeTemperature Gauge 24 " USM Calibration & Correction on Meters in TaiwanPower LNG Station Establishment of a National High-Pressure Natural Gas Flow Measurement Infrastructure

6. Copyright 2013 ITRI 工業技術研究院 Calibration Facilities at CMS 6

7. Copyright 2013 ITRI 工業技術研究院 7 CMS High Pressure Air Flow Calibration Facility 160 kg measurement capacity with 2-gram resolution 0.013% measurement uncertainty with collecting weight ≧ 20 kg gyroscopic weighing scale 1-50 bar 15-18000 Nm 3 /h Gravimetric method –Gyroscopic scale Reference standard –Compact sonic nozzle array (CSNA) –Uncertainty: 0.18% 7 SN

8. Copyright 2013 ITRI 工業技術研究院  CMC maintained through CCM-KC5b  Global Key Comparison organized by BIPM-CCM- Working group Fluid Flow  Measurement Capability Harmonized with PTB/Germany, LNE/France, NEL/UK and KRISS/Korea indicated by En<0.5 Primary Standard

9. Copyright 2013 ITRI 工業技術研究院 Some features of HP system HP system ~30s calibration time @Max flow Temp drops ~3 degree C @Max flow @Max Pressure, flow rate ~200 Am3/h Time of flight USM, time difference matter 1-4 time pressure range claimed by manufacturer, No Temperature dependent 9

10. Copyright 2013 ITRI 工業技術研究院 Calibration of Working Standards of CPC’s High Pressure Air Flow Facility 10 CPC’s WS: Four DN150 USM (Elster-Instromet Q.Sonic-4 Series-IV QL) All had been calibrated at SWRI in 2008 with meter factor adjusted to nearly 1 0.5 % 0.4 % Issues Concerned  thermal effect due to storage capacity limitation and Joule-Thomson effect  short calibration time (50 s@1000 m 3 /h)  possible time-delay of temperature measurement

11. Copyright 2013 ITRI 工業技術研究院 Calibration of 12” USM at four different years

12. Copyright 2013 ITRI 工業技術研究院 Improvements on Primary Facility Expanding air storage tank from 19 m 3 to 34 m 3 – completed in 2012 Use downstream CSNA to calibrate USMs ： new CSNA installed downstream of MUT, (totally 1000 m 3 /h @ 1 atm) – completed in 2012 12

13. Copyright 2013 ITRI 工業技術研究院 CMS’s Re-Circulating Loop 13 Working standard: two DN100 IRPP meters Checking standard: DN150 SICK USM (FLOWSIC600) Maximum operating flowrate ： 700 Am 3 /h Operating pressure range: 1 bar to 50 bar Temperature variation : < 0.2 ℃ /min U ≈ 0.25 % (k = 2) MUT IRPP SICK USM

14. Copyright 2013 ITRI 工業技術研究院 Thermal Effect & Some Test Results 14

15. Copyright 2013 ITRI 工業技術研究院 (1)Study Thermal Effect 15 Response time of temperature measurement –Comparing temperature measurements by PRT sensor and SOS data PRT sensorsensor part (d = 1.58 mm) Radial positions of the four acoustic paths Thermal Symmetry Indicator (TSI) gas composition P measured T measured = T i Iteration by REFPROP (v.9.0) until SOS theo = SOS diag T acoustic no stratification severer stratification

16. Copyright 2013 ITRI 工業技術研究院 16 Results and Discussion - Response time of temperature measurements MEPAFLOW 600 with burst mode, record cycle rate increased to 10 records/s blow down type facility upstream CSNA as WS 80 m 3 /h@10 bar Formal calibration begins (1) (2) (3) (1)pressurizing the upstream CSNA (2)pressure adjustment of the upstream CSNA (3)waiting for stability of flow (4)Formal calibration begins (4)

17. Copyright 2013 ITRI 工業技術研究院 17 Response time of temperature measurements - different flowrate conditions 80 m 3 /h@10 bar blow down type facility, upstream CSNA as WS 1000 m 3 /h@10 bar SOS, PRT temperature gradient appeared the same temperature gradient increases with increasing flowrates severer thermal stratification effect at higher flowrate TSI < 1

18. Copyright 2013 ITRI 工業技術研究院 18 before after lower temperature gradient after expanding the capacity of the upstream air storage tank Response time of temperature measurements - before and after improvements blow down type facility, upstream CSNA as WS, 1000 m 3 /h@10bar

19. Copyright 2013 ITRI 工業技術研究院 19 upstream CSNAdownstream CSNA DN CSNA has lower air temperature gradient (eliminate Joule-Thomson effect at the MUT) thermal stratification effect has also been reduced - upstream/downstream CSNA blow down type facility, 1000 m 3 /h@10bar Response time of temperature measurements TSI → 1

20. Copyright 2013 ITRI 工業技術研究院 (2)Calibration of USM 1.Two-USM package test at blow-down type facility with upstream CSNA (four E-I USM against the same SICK USM) 2.Two-USM package test at blow-down type facility with downstream CSNA (one E-I USM against the SICK USM) 3.Calibration of SICK USM at blow down type facility and re- circulating loop under the same operating conditions 4. CEESI calibration 20 DN150 Elster-Instromet USM (Q.Sonic-4 Series-IV QL) SN: 0118, 0119, 0120 & 0121 Two-USM package DN150 SICK USM (FLOWSIC 600)

21. Copyright 2013 ITRI 工業技術研究院 21 the meter error of the SICK USM was consistent within a deviation of ±0.2 %, suggesting stable operating conditions during calibration of both meters CPC’s working standards SICK USM DN150 Elster-Instromet USM (Q.Sonic-4 Series-IV QL) SN: 0118, 0119, 0120 & 0121 Two-USM package DN150 SICK USM (FLOWSIC 600) Calibration of two-USM package blow down type facility, upstream CSNA as WS, (80-1000) m 3 /h@10 bar

22. Copyright 2013 ITRI 工業技術研究院 22 a deviation within ±0.2 % except for the maximum flowrate condition CPC’s working standard SICK USM Calibration of two-USM package - upstream/downstream CSNA blow down type facility, (80-1000) m 3 /h@10 bar obvious inconsistent DN150 Elster-Instromet USM (Q.Sonic-4 Series-IV QL) SN: 0120 Two-USM package DN150 SICK USM (FLOWSIC 600)

23. Copyright 2013 ITRI 工業技術研究院 23 results agreed well between SICK and CMS atmospheric conditions10 bar Calibration of SICK USM 1.(20-1600) Nm 3 /h at SICK and CMS/blow down type facility 2.(80-1000) m 3 /h@10 bar at CMS repeatability was improved at higher flowrates results were consistent with flowrate < 400 m 3 /h need further test at higher flowrate

24. Copyright 2013 ITRI 工業技術研究院 Calibration SICK USM@CEESI 24 Pressure effect?

25. Copyright 2013 ITRI 工業技術研究院 Observation FOR Experience on USM calibration SHOULD be no Temperature and little Pressure effects on USM. Manufacturer info and basic principle of USM Year to year variation in 6” USM Transfer standards SICK meter appeared consistent, @atm, @blowdown/re-circulating Additional tests at CEESI gave different perspectives and need further investigation on SICK meter Need more tests on both 6”TS and SICK USM FOR High Pressure System Increase upstream air storage capacity, reduces pressure and temperature drops and thus, the time-delay problem of PRT measurement has been alleviated Re-circulating loop a good tool to save calibration time and high pressure calibration 25

26. Copyright 2013 ITRI 工業技術研究院 Current Progress Studying pressure effect on the calibration of an USM by re-circulating loop –Replacing working standard for CMS’s re-circulating loop from two DN100 IRPPs to five DN50 Itron rotary meters: –Check pressure effect of USMs with re-circulating loop at 10 bar and 50 bar 26 MUT Rotary Meter SICK USM

27. Copyright 2013 ITRI 工業技術研究院 27 Thanks for your attention!