FLUXYS BORDER STATIONS EQUIPED WITH ULTRASONIC AND TURBINE METERS … · 2014. 4. 4. · ULTRASONIC...

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FLUXYS BORDER STATIONS EQUIPED WITH ULTRASONIC AND TURBINE METERS IN SERIES

Laurent Cordier – Quality & Metrology (Fluxys Belgium)

2nd Annual European Flow Measurement Workshop: Ultrasonic and Coriolis Metering March 25-27, 2014 in Lisbon, Portugal

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AGENDA

!! Intro 1.! Who is Fluxys? 2.! Fluxys Border Stations 3.! Metrological Maintenance 4.! Conclusion

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13007000_EN

FLUXYS: GAS INFRASTRUCTURE COMPANY FOR EUROPE

BBL

INTERCONNECTOR

DUNKIRK LNG TERMINAL

NEL

TENP

TRANSITGAS

LNG terminalling

Transmission

Storage

!!Cross-border TSO in 6 countries !!Major gas transit operator !!Fully independent player

3 Fluxys 08.2013

TAP

A BELGIAN COMPANY

13007000_EN Fluxys 02.2013

Fluxys Belgium Regulated activities in Belgium

Fluxys

Fluxys Europe Non regulated activities in Belgium &

activities outside Belgium

Publigas

77.7%

Caisse de dépôt et placement du

Québec

20%

89.97%

Fluxys Finance Centralised management of cash

funds and financing

100% 100%

Federal Holding and Investment

Company

Employees and management

2.1% 0.2%

Listed shares NYSE

Euronext Brussels

Golden Share Belgian State

10.03%

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13007000_EN

NORWAY

NORWAY / GERMANY

KEY ASSET IN BELGIUM: TRANSMISSION INFRASTRUCTURE

Interconnection points

Compressor stations

Blending stations

Storage

LNG terminal

High calorific gas

Low calorific gas

4,100 km pipelines

Kortrijk

Tournai

Brugge

UNITED KINGDOM

LNG NETHERLANDS

Gent

Aalst

Mechelen

ZANDVLIET

NETHERLANDS

POPPEL

DILSEN

NORWAY / GERMANY

‘S-GRAVENVOEREN

Genk Winksele

Berneau

Namur

Verviers EYNATTEN

GERMANY RUSSIA /

BRAS

Bastogne

Arlon Libramont

LUXEMBOURG

LUXEMBOURG

BLAREGNIES

PÉTANGE

ZEEBRUGGE

ZELZATE

Loenhout

FRANCE SPAIN ITALY

Fluxys 11.2013

Mons

Charleroi

5

Liège

Brussels

Antwerpen Sint-Niklaas

Zeebrugge area: throughput capacity of ~ 50 bcm/y = approximately 10% of border capacity needed to supply Europe

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KEY VALUE: ~50% OF INCOMING GAS VOLUMES TRANSIT FROM BORDER TO BORDER

!! ~673 TWh measured @ Fluxys border stations

!! ~167 TWh measured @ end users stations in Belgium

GWh measured in 2013

167.603,00

420.462,00 252.859,00

Entry points Consumed in Belgium Exit points

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MEASUREMENT @ BORDER STATIONS IS CRUCIAL

!! Overall quantity of natural gas measured at 18 large-scale border stations

!! Just one third is measured at over 500 lower-capacity metering stations (large industries, power stations & public distribution)

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500

0

100

200

300

400

500

Number of metering stations

Border Stations End User Stations

673

167

0100200300400500600700

Measured Quantities in TWh

Border Stations End User Stations

Mea$urement uncertainty in a border station results in a financial uncertainty!

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AGENDA

!! Intro 1.! Who is Fluxys?

2.! Fluxys Border Stations 1.! Design of metering stations 2.! Design of a meter run 3.! Selected meter technology

"! Specific for UFM

3.! Metrological Maintenance 4.! Conclusion

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System A

System B

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GENERAL PRINCIPLE OF FLUXYS BORDER STATIONS

!! Multi-line Measuring system to ensure operational flexibility -! The meter runs are ideally located between separate collector

!! Two independents Measuring systems in series to insure reliability

-! the average of both systems is used for invoicing purpose

!! Two different flow meter technologies to reduce uncertainty -! Ultrasonic and turbine meters in series

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GENERAL PRINCIPLE OF A METER RUN

!! Entry valve !! 3D spool containing a conical filter (designed by Fluxys to reduce noise) !! 2D spool to withdraw the conical filter !! 10D upstream pipe without flow conditioner !! 3D ultrasonic flow meter !! 11D pipe with an insulated box containing the pressure transducers !! 10D upstream pipe including a tube bundle !! 3D turbine flow meter !! 11D pipe with sampling for chromatographs and ancillary measurements !! Exit valve

10 D 10 D 11 D 11 D

UFM Turbine

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SPECIFIC FOR ULTRASONIC METERS

!! Calibration of the UFM package

!! Installation with the same run configuration

!! Meter run carefully insulated in the field

UFM calibration with its 10D upstream pipe and 5D downstream pipe

The same meter installed in the border station with the same run configuration and carefully insulated

Thermal insulation of the piping and of the temperature transducer is important!

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SELECTED METER TECHNOLOGY

!! Turbine meters are most widely used in Fluxys border stations

>! Approved and tested by both partners >! High repeatability and reproducibility >! Long term stability

!! Ultrasonic meters are now used in series >! Low pressure loss >! No moving part >! Higher capacity

Two different principle of measurement in series is a must!

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ADVANTAGE OF THE UFM IN TERMS OF PRESSURE LOSS !! Example for a Fluxys meter run

-! Before: 1096 mbar

-! After: 693 mbar

13 L. Cordier

The reduction of the pressure loss in a border station allow to increase the capacity of the pipeline and/or to reduce the compression cost.

10 D 10 D 11 D 11 D

UFM

Turbine Turbine

Turbine

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AGENDA


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METROLOGICAL MAINTENANCE

!! Three levels can be identified

1)! Online monitoring 2)! Offline (Daily) monitoring 3)! Periodic verifications

System A

On-LineMonitoring

+Metrological Maintenance

System B

On-LineMonitoring


IN

OUT

Bundle

Off-line Monitoring

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1)! Online Monitoring >! Using a multiline flow computer (developed by Fluxys Belgium) >! Comparison of the meter run in // >! No measure is taken into account without verification >! Performed permanently and automatically >! Line coefficient as key indicator

System A

On-LineMonitoring


System B

On-LineMonitoring


IN

OUT

Bundle

Off-line Monitoring

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KEY INDICATOR FOR ULTRASONIC METERS IN //

!! Line coefficient -! calculated using the equation -! monitor the stability of the flow distribution -! generate warning and replacement value

.tot

llij V

NVC !=

Where:

Cij is the line coefficient

Vl is the volume transited via the line in question

Nl is the number of lines in operation in //

Vtot is the volume transited by all lines in operation in //

System A

On-LineMonitoring


System B

On-LineMonitoring


IN

OUT

Bundle

Off-line Monitoring

2)! Offline (Daily) Monitoring -! Check that measurements recorded by system A are consistent

with those recorded by system B -! The difference between two meters in series should be less

than 0.35% -! The difference between two independents systems should be

less than 0.1%

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2009069-Template Fluxys FR 19


2)! Offline (Daily) Monitoring -! Typical results between two stations in series

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3)! Periodic verifications of P, T° and GC -! Initial calibration by an accredited laboratory (ISO 17025) -! Periodic verification on site of the GC, P and T transmitters

against traceable references -! A maximum permissible error is defined by:

System A

On-LineMonitoring


System B

On-LineMonitoring


IN

OUT

Bundle

Off-line Monitoring

22measref UUMPE +=

!"#$%&#'()*'+')*',-.*#( .$#/0 1+!

23245 23625 23665

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!! Calibration of the flow meters -! Initial calibration by an harmonized and accredited

laboratory (ISO 17025) -! Periodic recalibration (as-found + as-left)

Example of an as-found calibration results Dev.(%) vs. Flow (m!/h): Notice meter still in perfect state Average weighted difference: -0.05% Annual drift: 0.01%

10 D 10 D 11 D 11 D

Calibration TCC 2013

Calibration NMI 2009

It is crucial that two meters in series on the same meter run are never replaced at the same time!

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WHY AN HARMONIZED LABORATORY?

!! Low uncertainty (<0.2%)

!! No systematic difference between the labs

!! Proven long term stability

!! Diversification of calibration labs

Proved long term stability Choice of the lower uncertainty

!"#$%& !"#$%' !"#$%()*(+, )*(), )*'+,

-"#$%& -"#$%' -"#$%()*'(& )*(&+ )*.+.

!"#$#% &'()*

Frequent comparisons between labs

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SPECIFICS FOR ULTRASONIC METERS

!! Calibration close to the field conditions >! Natural gas, P, T, piping...

!! Record and analysis of the log files >! Optimize parameters if necessary (P, T, detection settings...)

!! Linearization of the meter output

We need better communication between labs and manufacturers to apply the right calibration, adjustment procedures and linearization!

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!! The diagnostic allow to detect a problem in the field -! Velocity of sound (also to compare with GC) -! AGC / SN ratio (health of electronic) -! Flow profile (also to compare with the calibration) -! Performance...

The comparison between the main indicators recorded during the calibration and those recorded in the field is crucial. The onsite footprint without the lab footprint is insufficient!

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!! But a problem can also occur during the (re)calibration >! Significant difference between the VOS measured by the meter

and calculated by the GC >! Transducer damaged during transport or by depressurization >! Poor repeatability

In Europe, we need a one stop shop , for repair, calibration and optimization of the UFM, including software upgrade, replacement of the battery and transducers etc. A problem during calibration is costly!

A significant difference between the CMC and the

Utot is suspicious.

!! ityrepeatabilCMCUtot +=

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AGENDA


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CONCLUSION

!! A gas balance close to zero over time is a major concern for Fluxys Belgium or others TSO’s !! Low uncertainty measurement in large border stations is crucial !! Stringent metrological maintenance is a must

!! The correct use of UFM in the border stations is advantageous !! Two different principle of measurement in series reduces uncertainty !! Low pressure loss can increase the capacity of the pipeline and/or

decrease the compression cost

!! Periodic recalibration is often the only way of checking gas meters and maintaining steady metrological performance levels

!! Calibration labs that are traceable through the Harmonized European Cubic Meter of Gas represent a major progress in guarantying, reduced uncertainty, stable results, fair gas trading

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QUESTIONS ?

?

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2009069-Template Fluxys FR 29

FLUXYS BORDER STATIONS EQUIPED WITH ULTRASONIC AND TURBINE METERS … · 2014. 4. 4. · ULTRASONIC...

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