AMR based meter fleet surveillance

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2 Methods for periodical re-verification of heat meters Replacement of all heat meters e.g. with 5 years interval (most used principle in Europe) Statistical sample test (mainly used in Denmark) AMR based meter fleet surveillance (accepted by DANAK in Denmark)

3 Facts about AMR based meter fleet surveillance 5 years field experience 7308 installations made from 2004 to Heat utilities in Denmark are using this method Accepted by DANAK in February 2006

4 Interval (Years) AMR based meter fleet surveillance 7 Re-verification intervals in Europe (or no official rules for re-verification of heat meters) Austria Belgium Cyprus Czech Rep. Denmark Estonia Finland France Germany Greece Hungary Ireland Italy Latvia Lithuania Luxembourg Malta Netherlands Poland Portugal Slovakia Slovenia Spain Sweden United Kingdom Iceland Norway Switzerland Source: Working group Thermal Energy within AQUA, Sep. 2008

5 The principles behind AMR based meter fleet surveillance

6 Odd meter numbers UTILITY SIDE HEAT METER COMSUMER SIDE Even meter numbers UTILITY SIDE HEAT METER COMSUMER SIDE

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8 The heat meters used for AMR based meter fleet surveillance

9 AMR-based heat calculator for 2 flow meters and 3 temperature sensors Long-life flow meters qp m 3 /h. Insensitive to flow disturbances and magnetite

10 Parallel The ultrasonic beam runs in parallel with the measuring pipe and is transmitted from the transducers via the reflectors Triangle The ultrasonic beam covers the measuring pipe in a triangle. The ultrasonic beam is transmitted from the transducers and reflected in a triangle to cover the measuring pipe

11 Temperature loss/meter pipe (K) AMR based meter fleet surveillance Temperature loss in steel pipes 2 1,8 1,6 Reference conditions Water: 55 C Ambient: 23 C 1,4 1,2 Non isolated ¾ black steel pipe 1 0,8 0,6 0,4 0,2 Foam isolated ¾ black steel pipe Flow rate (Liter/hour)

12 Non isolated Max. pipe distances between sensors when allowing up to 0.25 K error at qi (15 liter/hour) Foam isolated ¾ black steel pipe

13 Results from AMR based meter fleet surveillance

14 Deviation E2-E1 (%) AMR based meter fleet surveillance 10 E2 -E1 % deviation per May 2004 Max. in-service-error set by the surveillance system Max. in-service-error acc. to the Danish rules Number of heat meter installations (357 meters per May 2004)

15 Deviation E2-E1 (%) AMR based meter fleet surveillance 10 E2 -E1 % deviation per May 2009 Max. in-service-error set by the surveillance system Max. in-service-error acc. to the Danish rules Number of heat meter installations (471 meters per May 2009)

16 Main meter in relation to check meter in % (E2-E1)/E1*100 % AMR based meter fleet surveillance Flow meters in flow pipe and return pipe, wrongly installed Flow pipe sensor were mounted in return pipe and vice versa Date of corrected installations Number of data readings (weekly) Due to the water density, the inlet is about 2.2% higher than the outlet at the temperature sets 75 C/27 C. This means approx. 4.4% error when the flow sensors are wrongly installed.

17 Deviation in K AMR based meter fleet surveillance Deviations in temperature sensor validations 0,5 0,4 0,3 0,2 0,1 0-0,1-0,2-0, ,4-0,5 Measurements per week Max. in-service-error set by the surveillance system

18 Measurement error i % AMR based meter fleet surveillance Compliance between system result and Laboratory re-verification (complete heat meters) ,01 0, F F F F F MDIR MDIR Flow (m3/h) 3qi - 0,1qp - 0,7qp Max. in-service-error acc. to the Danish rules

19 Cost comparison between: Replacement of all heat meters with 5 years interval and AMR based meter fleet surveillance

20 Euro s per meter AMR based meter fleet surveillance Accumulated cost of new meters and installations AMR based Ultrasonic heat meters Standard heat meters Years of service

21 Advantages with AMR based meter fleet surveillance Environmental savings because heat meters are in service as long as they are performing well Economical savings for the heat supplier Heat loss due to defective meters is reduced to a minimum

22 Advantages with AMR based meter fleet surveillance Meter surveillance in real installations means also surveillance of the impact of e.g. flow disturbances AMR and leak surveillance are included, meaning economical savings on meter reading and reduced supply water Efficient fraud detection

23 Thank you for your attention! Søren Lang Product Group Manager Meter Division, Heat, Cooling and Water