1. Innovative Natural Gas Calorimeter GasCVD
Fumitaka Nozawa
AAC Marketing Dept.
Yamatake Corporation

2. Contents 1. APPLICATIONS 2. FEATURES 3. STANDARD SPECIFICATIONS
4. PROCESS GAS SPECIFICATIONS
5. MODEL NUMBERS

3. APPLICATIONS MAJOR TARGETS
GasCVD is a custody transfer devise to realize fair deal under calorific value determining.
Especially in Europe, a lot of inlets as to natural gas from Africa, Russia, and East and West Europe. The customers expect to realize fair deal by real time calorific value measurement.
Main Pipe line
Local pipe line
Primary network for natural gas
Megadeal customers
ex. Power plants
Pressure regulator
Gas chromatgraphy with OIML R140
Secondary network for natural gas
Flow meaurement
GasCVD with OIML R140
End users

4. 1. APLICATIONS THE OTHER POTENTIALS
Combustion efficiency improvement for gas turbines
Gas turbine manufacturers use gas chromatgraphs to measure gas composition for gas turbine. But gas chromatgraph needs a lot of time to analyze gas composition, the customers expect real time, fast response calorific value measurement to improve combustion efficiency.
LNG satellites
LNG satellites control gas calorie before providing the customers. A lot of calorimeters are used in the sites.

5. 2. FEATURES (1) OIML R 140 and WELMEC compliant device
(2) Innovative structure compatible with various installation sites
(3) Revolutionary continuous measurement, and fast response
(4) Automatic calibration for prolonged stability
(5) A wealth of diagnostic functions

6. OIML R 140 and WELMEC compliant device
Can be used as a calorimeter or calorific value determining device (OIML R140 CVDD) for natural gas.

7. (2) Innovative structure compatible with various installation sites
• Unlike conventional gas calorimeters, GasCVD is innovative small and lightweight, allowing a variety of installation site choices.
• Explosion-proof structure is compliant with IECEx and ATEX, and suitable for Zone 1 use.

8. (3) Revolutionary continuous measurement, and fast response
Can detect a change of calorific value in processes in near real time by measuring every 2s. The time constant for 90 % response is within 30 seconds (sample flow rate: 50 ml/min) resulting in very fast output of natural gas calorific value.

9. Structure for revolutionary continuous measurement, and fast response
TCD Sensor
Gas flow

10. (4) Automatic calibration for prolonged stability
Automatic calibration using pure methane guarantees long-term stable operation.
Example for automatic calibration program

11. Example of recommended GasCVD installation for Automatic calibration

12. (5) A wealth of diagnostic functions
• Ambient temperature diagnostic function.
Determines whether the operating environment is suitable, making use of a temperature sensor embedded on the same chip as the thermal conductivity sensor.
• Operation time tracker function.
Keeps track of the total operation
time for comparison with the
recommended replacement period
(70000 hours) for the calorimeter.
• Automatic calibration history
check function.
Shows up to 5 of the latest automatic
calibration records to check changes
in the calibration factor.
Menu for diagnostics in HART ver.7.0

13. 3. STANDARD SPECIFICATIONS
Process gas connection port: NPT 1/8 (F), Rc 1/8
Electrical conduit: NPT 1/2 (F), M20
Case structure: IEC IP66
Flame-proof structure:
ATEX: II 2G Ex d II B T6 Gb;II 2D Ex tb IIIC T80 °C Db
IECEx: Ex d IIB T6 Gb, Ex tb IIIC T80 °C Db
Indicator: LCD
Calorie display: 5 digits
Units: SCV, MJ/m3
% display: setting range is shown by a % and by a bar graph
Automatic calibration setting display: ●and ○ light up alternately when set.
Calibration factor display: a flag is shown if calibration fails
Communications: HART protocol ver. 7.0
Power: 24 Vdc ±10 %, 0.3 A max. (inrush current at startup)
Output: Analog output 4–20 mAdc
Contact output:
24 Vdc ±10 %, 50 mA max. (transistor contact for status)
24 Vdc ±10 %, 1 A max. (transistor contact for calibration)

14. Indicator

15. 4. PROCESS GAS SPECIFICATIONS
Natural gas (NG), in gas form only
Temperature: –10 to 50 °C
Pressure: 110 kPa (abs) max. (at GasCVD process connection port inlet)
Flow rate: 50 ±10 ml/min
Dust: Less than 1 μm in diameter, 1 mg/m3 max.
Mist: none at –20 °C
Moisture: dew-point temperature –20 °C max.

16. 5. MODEL NUMBERS