Gas Technology Services P/L

CMRS

Customer Meter Reading Service

Presentation

Gas Technology Services P/L

• Overview of Gas Technology Services (GTS)

• Overview of Gas Measurement

• How flow computers log metering data

• Extraction of metering data from flow computers

• Overview of CMRS Online

• Retail clients accessing CMRS

Overview of GTS

• Independent Company– > 25 years experience in Gas– National experts in gas flow– Analysis of Gas Composition and Odour– Testing of Gas Appliances for Manufacturers– Calibration of Gas Detectors / Gas Equipment

• Gas Flow Metering– Field Calibration– Data Collection

Overview of Gas Measurement

• How is Natural Gas Flow Measured?

• How is Natural Gas Flow Recorded?

Overview of Gas Measurement

• Effects of Pressure on Gas Volume

• Effects of Temperature on Gas Volume

• If you pressurise and cool gas, you can fit more in a given area

• Resulting in a correction factor

Gas Flow CorrectorCalculates true volume in Sm3Records Hourly Data

Pressure measured in Kpa

Temperature in Deg C

Turbine Meter (Uncorrected flow)

Calculates True Volume (Sm3)

Corr.Factor = (Gas Press+101.325) X (273.515)

(Gas Temp. + 273.15) X 101.325 ) X FPV 2

Corrected (True) Volume = Uncorrected Volume X Correction Factor

Insert Gas Metering Pressure (P) : 70.000 kPaInsert Gas metering Temperature (T) : 20.00 Deg.CInsert Fpv (Supercompressability) : 1.0000

Ambient Temperature : 20 Deg.C

Calculated Correction factor (CF) 1.6622

Base Pressure (BP) 101.3 kPaBase Temperature (BT) 15 Deg.C

Zone Pressure (ZP) 101.3 kPa

1Cubic Meter recorded by Mech.Gas Meter = 1.662 Standard Cumic Meter(Uncorrected Volume) (Corrected Volume)

Corr.Factor = (Gas Press+101.325) X (273.515)

(Gas Temp. + 273.15) X 101.325 ) X FPV 2

Corrected (True) Volume = Uncorrected Volume X Correction Factor

Insert Gas Metering Pressure (P) : 2500.000 kPaInsert Gas metering Temperature (T) : 10.00 Deg.C

Insert Fpv (Supercompressability) : 1.0000Ambient Temperature : 20 Deg.C

Calculated Correction factor (CF) 26.1326

Base Pressure (BP) 101.3 kPaBase Temperature (BT) 15 Deg.C

Zone Pressure (ZP) 101.3 kPa

1Cubic Meter recorded by Mech.Gas Meter = 26.133 Standard Cumic Meter(Uncorrected Volume) (Corrected Volume)

How flow computers log metering data

• Metering data is logged at 60 min intervals

• Gas Temperature in Degrees Celcius

• Gas Pressure in kilo pascals (gauge) (kPaG)

• Uncorrected Volume in cubic meters (m3)

• Corrected Volume in standard cubic meters (SM3)

Extraction of metering data from flow computers

• Daily extraction – telemetry sites

• Monthly extraction – non telemetry sites

GTS Port Melbourne

OR

Hand Held Reader

Monthly data extraction

Desktop Modem

Daily data extraction

GSM Telemetry

Collection of raw hourly Data

Extracted metering data

What happens to data once it has been collected?

Validation of extracted metering data

• Metering Data is uploaded into CMRS and validated

• What is Data Validation?

Validation of extracted metering data

• Data Validation is– The application of predetermined tolerances to

Gas Measurement Attributes

Validation of extracted metering Data

For a given Metering site

• Expected Correction Factor• Expected Gas Pressure• Contract Maximum Hourly Quantity Limit• Contract Maximum Daily Quantity Limit• More than 72 hours consecutive zero flow records

Validation of extracted metering Data

Metering data can be wrong

• Mechanical Meter Failure (Results in zero records)• Flow Corrector / Data Logger Can Fail

– Pressure Transducer (Out of calibration or faulty)

– Temperature Transducer (Out of calibration or faulty)

– Corrupt Profile Data

Validation of extracted metering data

For Validation Log Example

Please refer to hand out

Validation example.txt

Validation of extracted metering data

What can happen if Metering Data is not Validated?

Metering Pressure fault example

MonthRecorded

Volume MJ True Volume

MJ Difference MJ Income Lost

Dec-01 113,697,012 128,447,208 14,750,196 44,250.59$ Jan-02 124,343,856 126,873,381 2,529,525 7,588.57$ Feb-02 117,163,566 121,242,526 4,078,960 12,236.88$ Mar-02 123,691,035 125,964,008 2,272,973 6,818.92$ Apr-02 22,836,918 23,437,327 600,409 1,801.23$

24,232,062 72,696.19$

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Previous example can cause

• Unnecessary substitution

• Un monitored MHQ & MDQ breakages

• Incorrect billed customers

• Times wasted

• Unhappy customers

Overview of CMRS On - Line

• Web based Gas meter reading service

• For Gas Retailers

• For Gas Retail customers

Conclusion

• Validation of gas meter data is important

• The service provided by GTS ensures that Retailers have correct metering data for client contracts

• Technical support provided by GTS

• Retail clients can access their metering data online