1 WATERFLUX - Comparisonon COO Rectangular Magmeter in water applications

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1 1 WATERFLUX - Comparisonon COO Rectangular Magmeter in water applications Jef Neven KROHNE

2 WATERMETERS $3000 EMF Price C&I (mechanical) water meters Residential water meters $30

3 Water Metering Costs of water metering Costs Include Capital costs Purchase of water meters (Prefabricated) Shafts Engineering & Installation Planning, drawings, soil reports Major and costly plumbing work for new installations: Site set-up, Excavation & disposal, Dewatering Meter reading Recurrent costs to read meters Bills based on consumption instead on monthly flat fees Pressure loss Higher pumping costs = Higher energy costs Maintenance Wear of meters, break down, Repairs or replacements Verification Inaccuracy Low flows, large variations in flow, flow disturbances Non revenue metering Apparent losses due to inaccurate measurements, etc Real losses e.g. due to pipeline leakages, etc

4 Development Constraints for Batterymag

5 Development Constraints for Batterymag Stable measurement (Low Noise) MID and OIML compatible Rangeability 400!!!!( 1% accuracy between 8m/s and 20 mm/s) Battery live time, install and forget Installation conditions Potable water approvals, worldwide Neglegible pressure dropp Low Cost

6 To make the above happen we need 1.The physics (Square shaped tube) 2.Optimal flow-tube construction 3.Adapted water contacting materials 4.Optimized magnetic system

7 EMF principle

8 1 The physics The square shaped measuring section, reason and advantages: 1.Flow profile independency: B v everywhere in the tube, pole plates parallel close to each other B Homogeneous over the measuring section B-field picture next page Signal contribution homogeneous over the measuring section 2.Flow profile disturbances squeezed out by contraction PTB picture next page 3.Velocity doubling. 4.Magnetic yoke distance decreased by 2 Magnetic Field multiplied by 2!!!

9 Flowtube development in cooperation with PTB

10 Rectangular cross-section PTB report: Calculations on flow profile behaviour demonstrate: WATERFLUX has a superior uniform flow profile, also with disturbances Ideal / Reference conditions (during calibration) - Full bore meter (a) Increasing in flow velocity from wall to the centre - WATERFLUX (b) Uniform flow velocity over pipe cross section Disturbed flow (elbow before & after meter) - Full bore meter (c) Large differences in flow profile distribution - WATERFLUX (d) Almost flat flow profile. Reacts 5 times better than full bore meter a c b d 10 WATERFLUX Introduction

11 Placeholder for Details square section

12 0D inlet, 0D outlet Test results Meter under test: WATERFLUX 3070 C DN50: Measurement results of meter in 3 configurations compared to results of a master meter 1. Without disturbances 2. With 2pcs. 90 bends before & after sensor; sensor in horizontal position 3. With 2pcs. 90 bends before & after sensor; sensor tilted Results Flow variations: 1 m3/h (0.14m/s) to 57 m3/h (8m/s) < 0.2%! Straight in-/outlet lengths can be reduced to 0 DN

13 Engineering & Installation (1) Lay-out Mechanical meters WATERFLUX 3070 Diameter Woltman Compound DN50-DN300/500 2"- 2 /20 DN50 - DN200 2" - 8 Inlet 10D to 20D 0D Outlet 3D to 5D 0D Filter Yes, recommended No Strainer Yes, in case of insufficient inlet No DN25 - DN600 1" - 24"

14 2 Optimal flow tube Moulded metal construction Predictable temperature and pressure behavior. Low Cost production Highly repetitive form ( Repetitive results) Integrated mechanics features for free (Electrodes, fixtures) No machining Same concept from DN25 up to DN200

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16 3 Adapted water contacting materials Specifications: Green Easy low cost and robust coating process on curved surfaces Worldwide Potable Water approvals High abrasion resistance High corrosion resistance (Especially for water industry and seawater) Worldwide references in water industry

17 Rilsan Green

18 Rilsan coating

19 4 Optimized magnetic system Magnetic calculations: High density magnetic material Low coil currents adapted to best performance of battery High N of windings Simple robust connections, a no-stress design Ultra Compact coil design (Photo next page) Avoid useless Magnetic flux (Outer shells)

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21 Rectangular Magmeter Typical field applications

22 Under ground installation Simple underground installation of meter can replace building of manholes Costs of made-to-measure manholes Engineering Planning Drawings Soil report Construction Site set-up Excavation & disposal Dewatering Investments (Prefabricated) Shaft Emergency bypass + valve

23 WATERFLUX 3070 for District Metering Features & Benefits High accuracy at low flow rates during nights High turndown ratio (1 : >400) Excellent repeatability for comparing usage patterns during nights High reliability, nothing to break down, no wear No straight length required (0D inlet / 0D outlet) Sensor can be buried Submersible (IP68) Battery powered Minimal pressure drop Easy data collection with KGA 42

24 WATERFLUX 3070 for Revenue metering / Billing Features & Benefits Reliable measurement data Large turndown ratio (1:400) for high accuracies day & night Not sensitive to flow disturbances or installation conditions Certified to MID MI-001 & OIML R49 Option: Verification to MID MI D inlet, 0D outlet Bi-directional, installation in any position Option: threat end connection for small sizes Battery powered, savings on power & cabling No pressure loss No scaling

25 WATERFLUX 3070 Remote Distribution Stations Solution: WATERFLUX x DN 150, 1 x DN 200 Battery power Large turndown ratio (1:400) Measuring error: < 0.5 % of MV flow rates of <10m3/h) 0D inlet, 0D outlet Bi-directional Reference electrode No separate grounding IP 68 (sensor)

26 Rectangular Magmeters Questions? 26 WATERFLUX - Comparisonon COO