Transactions of the KSME C: Technology and Education (대한기계학회논문집 C: 기술과 교육)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Proficiency Test of Water Flow Rate for Measurement Equivalence Among KOLAS Accredited Laboratories

KOLAS 교정기관의 측정동등성 확립을 위한 물유량 숙련도 시험

  • Chun, Sejong (Division of Physical Metrology, Korea Research Institute of Standards and Science) ;
  • Yoon, Byung-Ro (Division of Physical Metrology, Korea Research Institute of Standards and Science) ;
  • Kim, Soo-Jin (Korea Association of Standards and Testing Organizations)
  • 전세종 (한국표준과학연구원 기반표준본부) ;
  • 윤병로 (한국표준과학연구원 기반표준본부) ;
  • 김수진 (한국계량측정협회)
  • Received : 2016.06.09
  • Accepted : 2016.11.12
  • Published : 2017.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

KOLAS (KOrea Laboratory Accreditation Scheme) belongs to APLAC (Asia Pacific Laboratory Accreditation Cooperation). KOLAS manages the accreditation scheme for measurement traceability to SI units. As per June 2016, there are 22 KOLAS laboratories for liquid flow metering. Among them, 12 laboratories participated in the proficiency test (PM2015-08) for water flow metering, organized by KASTO (Korea Association of Standards and Testing Organizations). This proficiency test was performed with three kinds of flow ranges ($3.6m^3/h{\sim}12m^3/h$, $40m^3/h{\sim}80m^3/h$, $40m^3/h{\sim}200m^3/h$) considering the CMC (calibration and measurement capability) of the participating laboratories. The purpose of the proficiency test was to find out measurement equivalence of the CMC's between each participating laboratory and the reference testing laboratory (KRISS). The measurement equivalence was tested by the number of equivalence ($E_n$). If ${\mid}E_n{\mid}$ < 1, the measurement equivalence was established. All the participating laboratories passed this proficiency test.

한국인정기구(KOLAS)는 아시아태평양인정협의체(APLAC)에 소속되어 있으며, 측정 결과를 SI 단위로 소급하고 이를 유지시키기 위해 교정기관 인정제도를 운영하고 있다. 2016 년 6 월 현재, 22 개의 기관이 KOLAS 물유량 분야 교정기관으로 지정되어 있다. 이 중 12 개 KOLAS 교정기관들이 한국계량측정협회(KASTO)가 2015 년에 주관한 물유량 숙련도 시험(PM2015-08)에 참가했다. 이번 숙련도 시험은 KOLAS 교정기관들의 교정측정능력(CMC)을 고려하여 3 가지의 유량 범위($3.6m^3/h{\sim}12m^3/h$, $40m^3/h{\sim}80m^3/h$, $40m3/h{\sim}200m^3/h$)에서 실시되었다. 숙련도 시험의 목적은 참가기관들의 CMC 가 기준시험소(KRISS)의 CMC 와 비교하여 측정동등성이 성립하는지 여부를 판단하기 위한 것이다. 측정동등성은 측정동등성지수(number of equivalence; $E_n$)를 산출하여 평가했다. ${\mid}E_n{\mid}$ < 1 일 때, 측정동등성이 확립된다고 판단했다. 이번 시험에서 12 개 KOLAS 교정기관 모두 기준시험소와 측정동등성이 성립함을 확인했다.

Keywords

Acknowledgement

Grant : 연속체 동적거동 측정 및 제어기술 개발, 측정표준 보급 및 소급성 향상에 관한 연구

Supported by : 한국표준과학연구원

References

  1. Kim, J., Lee, D., Bae, C. and Woo, H., 2009, "Technical Application and Analysis for Reduction of Water Loss in Water Distribution Systems," Conference of Korea Water Resources Association, Yong Pyong Resort, Korea, 21st - 22nd May, pp. 260-266.
  2. Kim, Y.-S., Bae, S.-W., Cho, S., Kang, K.-H. and Park, H.-S., 2016, "Application of Direct Passive Residual Heat Removal System to the SMART Reactor," Annals of Nuclear Energy, Vol. 89, pp. 56 -62. https://doi.org/10.1016/j.anucene.2015.11.025
  3. Lee, W. K., Kim, K. Y., Ko, W. S., 2010, "Investigation of Orifice delta pressure abnormal condition for measuring Main Feed Water Flow in Nuclear Power Plant," Journal of Fluid Machinery, Vol. 13, No. 3, pp. 12-17.
  4. Furuichi, N., Terao, Y., Takamoto, M., 2009, "Actual flow calibration of a feedwater flowmeter using a high Reynolds number facility at NMIJ," Nuclear Engineering and Design, Vol. 239, No. 7, pp. 1304-1313. https://doi.org/10.1016/j.nucengdes.2009.03.009
  5. KOLAS Search Service (https://www.kolas.go.kr/usr/inf/srh/InfoCrrcInsttSearchList.do).
  6. Nam, K. and Ryu, K., 2015, "Flow measurement in the high Reynolds number," ASME-JSME-KSME Joint Fluids Engineering conference, COEX, Seoul, Korea, 26th - 31st July, pp. 917-918.
  7. Nam, K. H., Ryu, K. H. and You, Y. H., 2015, "Flowrate measurement accuracy at high Reynolds number," KSME 2015 Annual Meeting, 10th - 14th November, Jeju, Korea, pp. 146-150.
  8. Furuichi, N., Sato, H., Terao, Y. and Takamoto, M., 2009, "A new calibration facility for water flowrate at high Reynolds number," Flow Measurement and Instrumentation, Vol. 20, No. 1, pp. 38-47. https://doi.org/10.1016/j.flowmeasinst.2008.11.001
  9. Ryu, C.-H. and Lee, S.-H., 2013, Understanding of statistics with R, Free Academy, Paju, Korea, pp. 175-205, 333-351.
  10. ISO/IEC Guide 98-3, 2008, Uncertainty of measurement - Part 3: Guide to the expression of uncertainty in measurement (GUM:1995), Geneva, Swiss.
  11. KOLAS-R-003, Guidelines for proficiency test, Korea Laboratory Accreditation Scheme, Eumseong Gun, Korea, pp. 2-15.
  12. PM2008-04, 2009, Proficiency test of an electromagnetic flow meter for liquid flow, Korea Association of Standards and Testing Organizations, Seoul, Korea, pp. 3-8.
  13. PM2015-08, 2015, Proficiency test of Coriolis mass flow meters for liquid flow, Korea Association of Standards and Testing Organizations, Seoul, Korea, pp. 4-23.
  14. Chun, S., Yoon, B.-R., Kim and S.-J., 2016, "Proficiency Test of Flow Measurement using Coriolis Flow Meters," KSPE 2016 Spring Conference, 11th - 13th May, Jeju, Korea, pp. pp. 126-127.
  15. Chun, S., Yoon, B.-R., Kang, W., Lee, Y.-B. and Choi, H.-M., 2015, "Development of a flow facility to calibrate large liquid flow meters," KSME 2015 Annual Meeting, 10th - 14th November, Jeju, Korea, pp. 158-161.
  16. ISO 4185, 1980, Measurement of liquid flow in closed conduits - Weighing method, International Standard Organization, Geneva, Swiss, pp. 10-15.
  17. Chun, S., Yoon, B.-R. and Choi, H.-M., 2014, "Uncertainty estimation of a liquid flow standard system with small flow rates," Measurement, Vol. 51, pp. 367-376. https://doi.org/10.1016/j.measurement.2013.12.002
  18. Chun, S., Yoon, B.-R., Choi, H.-M. and Lee, Y.-B., 2016, "Calibration of a water flow meter using a reference flow meter," KSPE 2016 Spring Conference, 11th - 13th May, Jeju, Korea, pp. OS181-OS182.
  19. Willink, R., 2003, "On the interpretation and analysis of a degree-of-equivalence," Metrologia, Vol. 40, pp. 9-17 https://doi.org/10.1088/0026-1394/40/2/302