Thermal Mass Metering Technology
AERIUS Gas Meter
International Congress and Exhibition on
Smart Grids
Istanbul 2013
Agenda
•
Diehl-Group & Corporate Division Diehl Metering
•
Diehl Gas Metering
•
Thermal Mass Meter AERIUS: Principle & Technical Details
•
AERIUS: Added Value
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Diehl Metering
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Diehl: Corporate Profile
Sales:
2,9 Billion € *
Employees:
14.500 *
Head office:
Nürnberg
Corporate Divisions:
Family-owned company since 1902
* Trends 2012
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Diehl Group: Corporate Divisions
Semi-finished products and forged parts of copper
and copper alloys
Controls for domestic appliances
Systems for defence and homeland security
Systems to equip cabins and avionics
Water & Energy Metering as well as Smart Metering
solutions
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Corporate Division: Diehl Metering
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Corporate Division Diehl Metering: Key Figures
Sales:
265 Million Euro
Employees:
2,000
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6.5 Mio
Measuring Units p. a.
4.1 Mio
Radio Modules p. a.
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Corporate Division Diehl Metering: Locations
Production and Sales
Ansbach
Velbert
Saint-Louis
Cieszyn
Wangen
Mátészalka
Jinan
Milan
Recife
Vienna
Production Plant
Nuremberg
Apolda
Sales Company/Office
Dubai
Esbjerg
Lyon
Paris
Madrid
Manchester
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Corporate Division Diehl Metering
Product examples
Water meters
HYDRUS ultrasonic meter
Heat meters
SHARKY ultrasonic energy meter
Gas meters
AERIUS microthermal gas meter
Electricity meters
Echelon electricity meter
Systems and software
IZAR RDC (data concentrator)
Smart Metering solutions
Services and communications
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Diehl Smart Metering System
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Diehl Gas Metering
Product Portfolio Gas
Center of Competence
for
Gas Measurement
• Static Gas Meter
- Pressure independence
- Temperature conversion
Diehl Gas Metering GmbH
Industriestraße 13
91522 Ansbach
• Integrated Communication
- Radio
Tel.: +49 981 1806-300
Fax: +49 981 1806-325
- M-Bus
info@diehl-gas-metering.de
www.diehl-gas-metering.de
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Modern Gas Test Lab
•
•
Unique real gas and endurance test benches
• all kind of gases
• -25 C° to +55 C°
• wide range of flow rates
Approved as national authorized test lab for gas meters
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AERIUS
Domestic gas meter based on the microthermal measurement principle
For pressure independent and temperature converting standard volume measurements
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Cross Section AERIUS
Gas outlet
Gas
inlet
Distributing
chamber
Cover plate
Fire protection
valve
Measuring Unit
Cyclone filter
Feed
Body
Particle rest area
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Measuring Unit
By-pass Principle
sensor
measuring channel
pressure dropper
main channel
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Microthermal measuring principle
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Animation Measuring Principle
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Microthermal Mass Flow Measuring Principle
Heater Temperature
max. 20 K
•
Gas molecules act as «heat-carriers»
•
The heat transport of the gas stream is
measured, which is corresponding to the
mass flow
•
No volume measurement
•
Mass flow is a measure for the number of
molecules (per time interval)
•
Molecules are carriers of the thermal energy
of the gas
Q
Sensor
Temperature
Sensor 1
ΔT max. 2 K
Temperature
Sensor 2
Heating power:
2 mW
Duration of measurement:
50 msec
Measurement interval:
2s
Thermal energy = c . # molecules . calorific value
Result of measurement is
Standard Volume
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Microthermal Mass Flow Sensor
Thermopile 1
Thermopile 2
Heating Element
Sensor
Absolute Temperature
Sensor
Electronics
(A/D-Converter)
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AERIUS Measurement Results
4
-25°C
-20°C
-10°C
0°C
10°C
20°C
3
2
30°C
40°C
50°C
55°C
Fehler / %
1
0
0,01
0,1
1
10
ISO H3 -25°C
N2 -25°C
CH4 -25°C
ISO H2 -25°C
-1
-2
-3
-4
40 l/h
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600 l/h
Diehl Metering
6000 l/h
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Built-in Communication Interfaces
•
Wired M-Bus (EN 13757)
•
Wireless M-Bus (EN 13757)
• Integrated radio interface
• 868 MHz
• 434 MHz
• OMS® protocol
• AES-key (individually possible)
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Domestic Gas Billing
(example Germany DVGW G685)
Diaphragm gas meter
AERIUS
Assumptions:
Temperature 15°C
Air pressure 1016mbar
Pressure in supply pipe 22mbar
Display in relation to:
Temperature 0 °C
Air pressure 1013.25mbar
T-correction
273.15 / 288.15 = 0.9479
p-correction
1016 – (0.12 * m.ü.M.) + 22
1013.25
condition number
= 0.9479 * p-correction
Calorific value
kWh/m3
relative to
273.15 K and 1013.25 mbar
Multiplication with the count
and the condition number
condition number
=1
Bill
kWh
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AERIUS: Added Value
•
•
•
Transparent gas billing for end customers through standard volume indication
– Energy consumption: Standard volume output multiplied by calorific value
Independent of
– Atmospheric Pressure
– Temperature
Gas types
– Natural gases of type H and biogas (methane CH4)
– Air
•
•
•
Fraud Detection
– Air detection
Power Budget
– Battery life time up to 20 years
Repetitious, long-term stable and high accuracy of measurements
– No moving parts
– Wear-free
– Small gas flows
– Overload resistant
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