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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 Maximum discharge Pipe Line Size

Maximum velocity

Maximum Line Size Possible Sump Dimensions Type of Flow Pumps Head Type of Drive Power Uncertainty

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:Water :15000 m3/hr :2000mm (Design) & Ready to Use 1200mm :1.4m/s. in 2000mm dia. & 3.4 m/s. in 1200mm dia :3000mm :50m (L)x 8 m (W) x 7.5 m (D) :Direct Pumping :Vertical turbine 5 numbers :20m of Water Column :Electrical Motor, Slip ring type :DG Sets, 1250 KVA 2 Nos :+/- 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


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