THE LARGE WATERFLOW LABORATORY- A NEW FACILITY FOR CALIBRATING LARGE SIZE FLOWMETERS

THE LARGE WATERFLOW LABORATORY- A NEW FACILITY FOR CALIBRATING LARGE

SIZE FLOWMETERS

G.Sundaravadivel,Dr.Jacob Chandapillai,

A.S.Murali

CALIBRATION OF LARGE SIZE FLOW PRODUCTS

LIMITATIONS OF INDIRECT METODES Scaled down model study By-pass flow metering technique Insertion flow meters Calibrating higher size flowmeter in a smaller size

calibration rig. Velocity vs error curve

Specifications The major specifications when the NABL

and the market requirements are merged Flow Medium :Water Maximum discharge :15000 m3/hr Pipe Line Size :2000mm (Design) & Ready to Use

1200mm Maximum velocity :1.4m/s. in 2000mm dia. & 3.4

m/s. in 1200mm dia Maximum Line Size Possible :3000mm Sump Dimensions :50m (L)x 8 m (W) x 7.5 m (D) Type of Flow :Direct Pumping Pumps :Vertical turbine 5 numbers Head :20m of Water Column Type of Drive :Electrical Motor, Slip ring type Power :DG Sets, 1250 KVA 2 Nos Uncertainty :+/- 0.5%

SUMP

PUMP HOUSE POWER HOUSE

REFERENCE FLOWMETERS TEST LINE

TRACEABILITY OF MEASUREMENTS FLOWRATE(REF.FLOWMETERS)

TRACEABLE TO WFL,FCRI STATIC WEIGHING METHOD

MASS---WORKING STD. AT PSL,FCRI---NPL TIME---WORKING STD.AT ETL,FCRI---NPL TEMP.---WORKING STD.AT ETL,FCRI---NPL

DIFFL.PR.--- WORKING STD.A STROKE

(LENGTH)--- WORKING STD. AT PSL,FCRI---NPL

OVERALL UNCERTAINTY IN FLOWRATE MEASUREMENT IS BETTER THAN +/-0.5%

CALIBRATION OF FLOWMETERS AT LWFL

THANK YOU