NATIONAL METROLOGY INSTITUTE OF JAPAN Asia Pacific Metrology

NATIONAL METROLOGY INSTITUTE OF JAPAN Asia Pacific Metrology Programme 2009 – TCFF Meeting, 14 -15 Dec, Kuala Lumpur, Malaysia Report on the Progress of A New Calibration Facility for Small Flow of Hydrocarbon Liquid CHEONG Kar-Hooi Liquid Flow Standards Section, Fluid Flow Division NMIJ, AIST

NATIONAL METROLOGY INSTITUTE OF JAPAN Contents • • Background / Motivation Work on the New Facility Problems and Challenges Future Plan

NATIONAL METROLOGY INSTITUTE OF JAPAN ■Are there needs for small hydrocarbon flow standards? One example… 18. 8 km/L ■Environmental friendly cars sell better than fast cars. ■People care for “km/L” much more than “km/h”. Fuel efficiency indicator becomes a standard specification for cars nowadays.

NATIONAL METROLOGY INSTITUTE OF JAPAN ■Stricter regulations for fuel efficiency in the future. Country (year) km/L ⇒JPN (2020) 21 ⇒EU (2020) 24. 5 ⇒US (2016) 15. 1　 source: Asahi Shimbun (2009/12/3) With around 6 million of annual car sales in Japan, traceability for fuel efficiency is an urgent need.

NATIONAL METROLOGY INSTITUTE OF JAPAN ■Flow range covered by the present oil facilities Flow conditions Light oil, kerosene Large: 15~35℃, 100~800 k. Pa Medium: 10~35℃, 300~700 k. Pa Large range 3 ~ 300 m 3/h BMC 0. 03% Medium range 0. 1 ~ 15 m 3/h BMC 0. 03% Small range Not available Flow range m 3/h 10 -4 10 -3 10 -2 10 -1 1 10 102 103

NATIONAL METROLOGY INSTITUTE OF JAPAN Contents • • Background / Motivation Work on the New Facility Problems and Challenges Future Plan

NATIONAL METROLOGY INSTITUTE OF JAPAN ■Outline of the new facility Storage tank ・Volume capacity: 26 L ・Working fluid: light oil Flow generation section Magnetic gear pump ・revolution speed is changeable ・max. 11 L/min, 0. 87 MPa Header tank ・Cylinder ・Volume capacity: 2 L Heat exchanger ・Cooling power: 900 W, ・Heating power: 2. 5 k. W, ・Temperature range: 15~35℃ 　　　　　　（± 0. 1~0. 2℃）

NATIONAL METROLOGY INSTITUTE OF JAPAN ■Outline of the new facility Positive displacement flowmeter (check standard) 1/4” Test line ・ 0. 01~0. 1 m 3/h ・Re=1200~4300 Test section 100 D DUT 1/8” Test line ・ 0. 001~0. 01 m 3/h ・Re=120~1200 Coriolis flowmeter (check standard) Resistance Pressure thermometer transmitter sensor (explosion-proof)

NATIONAL METROLOGY INSTITUTE OF JAPAN ■Outline of the new facility ■Gravimetric calibration ■Method: Standing-start-and-finish with static weighing Weighing section Flowrate control valve Enclosed chamber Bypass to storage tank Weighing vessel (beaker) Weighing scale Capacity: 6. 2 kg Readability: 0. 01 g Resolution: 1/620000

NATIONAL METROLOGY INSTITUTE OF JAPAN ■Facility in building process… The facility is being built in a room designated as hazardous area due to flammable working fluid. Lighting and electrical wiring were also upgraded to explosion-proof level. Once in operation, the room will be ventilated and humidified at all time.

NATIONAL METROLOGY INSTITUTE OF JAPAN ■Problems and Challenges • Measurement uncertainty is targeted at 0. 1%. Uncertainty budget will be done once the facility is operational. • Uncertainty due to the weighing section has to be evaluated carefully. • Short of money （￥）: explosion-proof equipment and room renovation are too costly. • Room temperature control is not effective at present. Installation of high-performance air-conditioning is necessary. • Automation of the facility. • Shift to flying-start-and-finish method. For this, diverter system needs to be installed.

NATIONAL METROLOGY INSTITUTE OF JAPAN ■Future Plan Light oil, kerosene 0. 001 Light oil, kerosene 0. 01 Light oil Calibration range 0. 1 Light oil m 3/h 0. 0001 0. 00005 Estimated flow range for evaluation of fuel efficiency 2009 2010 2011 2012 2013 2014

NATIONAL METROLOGY INSTITUTE OF JAPAN Thank you for your attention. Terima kasih. mail: kh. cheong@aist. go. jp Mt. Tsukuba