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January 15, 2015 1 Identifying dominant measurements errors in fully automated water networks PWN Waterleidingbedrijf Noord-Holland Water technology Lucyna.

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Presentation on theme: "January 15, 2015 1 Identifying dominant measurements errors in fully automated water networks PWN Waterleidingbedrijf Noord-Holland Water technology Lucyna."— Presentation transcript:

1 January 15, 2015 1 Identifying dominant measurements errors in fully automated water networks PWN Waterleidingbedrijf Noord-Holland Water technology Lucyna Magda

2 2 Content Problem definition Errors in mass balances Flowmeter In-Situ calibration and its constraints Vendors who sell this kind of equipment PWN-state of the art List of companies who use this kind of equipment Recommendations- advice on application. January 15, 2015 MSc: Water Resources Management, Lucyna Magda

3 Scope of the presentation 3 Water balances Flowmeters Calibration January 15, 2015 MSc: Water Resources Management, Lucyna Magda

4 Water balance 4 January 15, 2015 MSc: Water Resources Management, Lucyna Magda ∑(OUT-IN)-dS/dt=0 Water balances

5 PWN-Validatie ruwwaterstrom 2002 Up to 70% of water balances are doubtful All balances show systematic error-bias The errors are in the reach 3000 m3/day Possible causes: Leakage Additional inflow Flowmeters malfunctioning RESULT OF THE ANALYSIS RESULT OF THE ANALYSIS 5 January 15, 2015 MSc: Water Resources Management, Lucyna Magda Water balances

6 6 Problem definition Malfunctioning field devices, including flowmeters cause process disturbances and errors in mass balances When such devices monitor themselves, faults can be detected and reported at an early stage, greatly reducing their impact on the process. January 15, 2015 MSc: Water Resources Management, Lucyna Magda Water balances

7 7 Problem definition January 15, 2015 MSc: Water Resources Management, Lucyna Magda Water balances

8 8 Problem definition “On site flow calibration is painful but necessary” January 15, 2015 MSc: Water Resources Management, Lucyna Magda Water balances

9 9 Errors in mass balances Faults are frequently not the result of an instrument defect but application-related malfunctioning: device selection and sizing, unsuitable installation, application problems. January 15, 2015 MSc: Water Resources Management, Lucyna Magda Water balances

10 10 Type of the errors 1. Systematic Errors 2. Accidental and Random Errors Vendors: gross errors = systematic if proper installed. January 15, 2015 MSc: Water Resources Management, Lucyna Magda Water balances

11 11 Errors from the flowmeters Gross error e - the manufactory error, b - a systematic error x - systematic component of the random error January 15, 2015 MSc: Water Resources Management, Lucyna Magda Water balances

12 12 Flowmeters types-choice dilemma January 15, 2015 MSc: Water Resources Management, Lucyna Magda Flowmeters

13 13 Flowmeters best application January 15, 2015 MSc: Water Resources Management, Lucyna Magda Flowmeters

14 14 Flowmeters surrounding errors January 15, 2015 MSc: Water Resources Management, Lucyna Magda Flowmeters

15 15 Electromagnetic Flowmeter (1) U = K × B × v × D K instrument constant B magnetic field strength v mean flow velocity D electrode spacing The volumetric flow rate qv can be calculated according to (2) qv = v × D² × π/4 It follows from equation (1) that (3) v = U / K×B×D Therefore: (4) qv = (U / K×B) × D × π/4 January 15, 2015 MSc: Water Resources Management, Lucyna Magda Flowmeters

16 Flowmeter: Primary and Secondary 16 January 15, 2015 MSc: Water Resources Management, Lucyna Magda Secondary Primary Flowmeters

17 Examples of Primary and Secondary 17 January 15, 2015 MSc: Water Resources Management, Lucyna Magda Flowmeters

18 Wet Calibration 18 January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration 1. 2. 3.

19 19 Dry Calibration- Flowmeter Secundary January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration

20 20 Verification techniques- Flowmeter Primary January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration

21 21 Verification techniques- Flowmeter Secundary January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration

22 22 Flowmeter calibration-a typical calibration curve January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration

23 Name Number of flowmeters at PWN Expanded diagnostic Verification techniques 161CallMasterMagMaster Emflux2- COMBINED EMFLUX 74- Field Check Heinrichs2- UMF 16Optiflux MAGCHECK Tokimec8- TOKYO KEIKI -- SIMENS VERIFICATOR Juergen-- COMBINED EMFLUX 23 Vendors January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration

24 24 PWN-state of the art January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration

25 25 Recommendations How to choose which flowmeters should be replaced: Water Balances that do not pass validation and the following set in the importance order: Plenty control strategic points Plenty Performance Plenty Cardio PT-Monthly Reports Setpoint related flowmeters January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration

26 26 PWN- Schematic representation of WRK January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration

27 27 PWN- Schematic representation of WRK January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration Plenty control biggest importance Bed water mass balances

28 28 PWN- Schematic representation of WRK January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration Plenty control biggest importance Bed water mass balances

29 29 PWN- Schematic representation of WRK January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration Plenty control biggest importance Bed water mass balances

30 30 Recommendations Electromagnetic flowmeters at Bergen should be replaced with the footprinted flowmeter Electromagnetic flowmeter at Secundairs 9-10 should be replaced with the ultrasonic 3-beams flowmeter I recommend periodic pipe inspecions near the extraction point I recommend structural changes where it is possible to increas the flushing of the sediments January 15, 2015 MSc: Water Resources Management, Lucyna Magda Calibration

31 31 Similar projects in The Netherlands Grolsh brewery in Enschede- Optiflux 4000 and mass flowmeters Detroit water and Sewage Department- Mag master and Call Master Both cases have been published with positive reviews January 15, 2015 MSc: Water Resources Management, Lucyna Magda

32 January 15, 2015 32 QUESTIONS? 5 min

33 January 15, 2015 33 Thank you for you attention. Special thanks to: Ignaz Worm, Eric de Vos, Henk van Duist, Harry Rolf, and everyone else from the Water Technology team


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