Transcript 超音波計量設備管線設計標準化

High pressure gas flow calibration
facility at CMS
Jiunn-Haur Shaw
Center for Measurement Standards/ITRI, Taiwan
2013 APMP TCFF Workshop, Taipei, Taiwan
November 22-23, 2013
Outline
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Natural Gas Calibration Infrastructure
Calibration Facilities at CMS
Thermal effect and some Test Results
Observation & Current Progress
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Transmission and Distribution Pipeline
LNG import
20% Household
80% 12 PowerGen
-Total Pipe Length:
1,892KM
-Natural Gas 2.5 folds
increase in 10 years
-Total of 12 TP & IPP
power plants
-Total NG usage over
15BM3
custody transfer meters
(DN250 to DN600)
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Establishment of a National High-Pressure
Natural Gas Flow Measurement Infrastructure
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Needs: On-site metrological control of large capacity NG measurement instruments in a Power Plant
Approach:(1) Establish QS & physical traceability chain with national standard through transfer standards
(TS) calibrated in CMS to attain global equivalence under CIPM MRA scheme
(2) Combine 2-3 standard meters to cascade up flow capacity through un-broken chain of
calibration
(3) On-site comparison and control check of 600mm ultrasonic custody transfer meters (USM)
Benefits: (1) Assure quality control and measurement accuracy for energy transaction between Chinese
Petroleum Corp (CPC) and Taiwan Power Company (Tai Power); (53 bars operation pressure,
1.65 MM tons/yr)
(2) Through the dissemination of national standard to on-site calibration with proper QS
implementation, NML contributes to the reduction of global warming equivalent to
CO2 emission of 4 MM tons/yr
Weighing + Nozzle
(15-18000) m3/h
U = 0.18 %, 60bars
Re-circulating HP system
4000 m3/h @(10 to 60) bar
U = 0.45 %
CMS High Pressure Air
Flow Facility, participated
CIPM.FF-K5b
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CPC High Pressure Air
Flow Facility (a Partner
Laboratory of NML)
On-site practice @ Taiwan
Power metering station
Four 300 mm USM TS in
parallel
Establishment of a National High-Pressure
Natural Gas Flow Measurement
Infrastructure
Calibration on Standard Meters in NML
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6
"USM
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Standard
Pressure Gauge
Standard
Temperature Gauge
High pressure Air flow Calibration System
NMLTemperature Calibration System
Pressure Calibration System
Calibration on Standard Meters in CPC Secondary Facility
12
"USM
CPC Secondary High pressure Air flow Calibration System
NML Temperature Calibration System
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NML Pressure Calibration System
Pressure Gauge Temperature Gauge
Calibration & Correction on Meters in TaiwanPower LNG Station
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"
CPC 12"USM
NML Temperature Calibration System
NML Pressure Calibration System
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Pressure Gauge
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工業技術研究院
USM
Temperature Gauge
• Calibration Facilities at CMS
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CMS High Pressure Air Flow
Calibration Facility
gyroscopic
weighing scale
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• 160 kg measurement capacity with
2-gram resolution
• 0.013% measurement uncertainty
with collecting weight ≧ 20 kg
7 SN
1-50 bar
15-18000 Nm3/h
Gravimetric method
– Gyroscopic scale
Reference standard
– Compact sonic nozzle array (CSNA)
– Uncertainty: 0.18%
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Primary Standard
CMC maintained through CCM-KC5b
 Global Key Comparison organized by BIPM-CCMWorking group Fluid Flow
 Measurement Capability Harmonized with
PTB/Germany, LNE/France, NEL/UK and
KRISS/Korea indicated by En<0.5
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Some features of HP system
• HP system ~30s calibration time @Max
flow
• Temp drops ~3 degree C @Max flow
• @Max Pressure, flow rate ~200 Am3/h
• Time of flight USM, time difference matter
• 1-4 time pressure range claimed by
manufacturer, No Temperature dependent
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Calibration of Working Standards of
CPC’s High Pressure Air Flow Facility
CPC’s WS:
Four DN150 USM (Elster-Instromet Q.Sonic-4 Series-IV QL)
0.4 %
0.5 %
• Issues Concerned
 thermal effect due to storage capacity limitation
and Joule-Thomson effect
 short calibration time (50 s@1000 m3/h)
0.4 % 0.5 % of temperature measurement
 possible time-delay
0.4 %
• All had been calibrated at SWRI in 2008 with meter factor adjusted to nearly 1
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Calibration of 12” USM at four different years
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Improvements on Primary Facility
• Expanding air storage tank from 19
m3 to 34 m3 – completed in 2012
• Use downstream CSNA to calibrate
USMs ： new CSNA installed
downstream of MUT, (totally 1000
m3/h @ 1 atm) – completed in 2012
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CMS’s Re-Circulating Loop
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Working standard: two DN100 IRPP meters
Checking standard: DN150 SICK USM (FLOWSIC600)
Maximum operating flowrate：700 Am3/h
Operating pressure range: 1 bar to 50 bar
Temperature variation : < 0.2 ℃/min
U ≈ 0.25 % (k = 2)
MUT
SICK
USM
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IRPP
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Thermal Effect & Some Test
Results
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(1)Study Thermal Effect
Response time of temperature measurement
– Comparing temperature measurements
sensor and SOS data
PRT sensor
by
PRT
sensor part (d = 1.58 mm)
gas composition
Pmeasured
Iteration by REFPROP (v.9.0)
until SOStheo = SOSdiag
Tacoustic
Tmeasured = Ti
Thermal Symmetry Indicator (TSI)
Radial positions of the
four acoustic paths
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4
 TSI  1: no stratification
TSI  1 exp SOS i  SOSavg 2 
 i 1
 TSI  0 : severer stratification
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Results and Discussion
- Response time of temperature measurements
blow down type facility
upstream CSNA as WS
80 m3/h@10 bar
(2)
(1)
(3)
MEPAFLOW 600 with burst
mode, record cycle rate
increased to 10 records/s
(4)
Formal
calibration
begins
(1) pressurizing the upstream CSNA
(2) pressure adjustment of the upstream CSNA
(3) waiting for stability of flow
(4) Formal calibration begins
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Response time of temperature measurements
- different flowrate conditions
blow down type facility, upstream CSNA as WS
TSI < 1
80 m3/h@10 bar
1000 m3/h@10 bar
• SOS, PRT temperature gradient appeared the same
• temperature gradient increases with increasing flowrates
• severer thermal stratification effect at higher flowrate
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Response time of temperature measurements
- before and after improvements
blow down type facility, upstream CSNA as WS, 1000 m3/h@10bar
before
after
• lower temperature gradient after expanding the capacity of
the upstream air storage tank
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Response time of temperature measurements
- upstream/downstream CSNA
blow down type facility, 1000 m3/h@10bar
TSI → 1
upstream CSNA
downstream CSNA
• DN CSNA has lower air temperature gradient
(eliminate Joule-Thomson effect at the MUT)
• thermal stratification effect has also been reduced
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(2)Calibration of USM
1.Two-USM package test at blow-down type facility with
upstream CSNA (four E-I USM against the same SICK
USM)
2.Two-USM package test at blow-down type facility with
downstream CSNA (one E-I USM against the SICK USM)
3.Calibration of SICK USM at blow down type facility and recirculating loop under the same operating conditions
4. CEESI calibration
DN150 SICK USM
(FLOWSIC 600)
DN150 Elster-Instromet USM
(Q.Sonic-4 Series-IV QL)
SN: 0118, 0119, 0120 & 0121
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Two-USM package
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Calibration of two-USM package
blow down type facility, upstream CSNA as WS, (80-1000) m3/h@10 bar
DN150 SICK USM
(FLOWSIC 600)
DN150 Elster-Instromet USM
(Q.Sonic-4 Series-IV QL)
SN: 0118, 0119, 0120 & 0121
CPC’s working standards
Two-USM package
SICK USM
• the meter error of the SICK USM was consistent within a
deviation of ±0.2 %, suggesting stable operating conditions
during calibration of both meters
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Calibration of two-USM package
- upstream/downstream CSNA
blow down type facility, (80-1000) m3/h@10 bar
DN150 SICK USM
(FLOWSIC 600)
obvious
DN150 Elster-Instromet
USM
inconsistent
(Q.Sonic-4 Series-IV QL)
SN: 0120
CPC’s working standard
Two-USM package
SICK USM
• a deviation within ±0.2 % except for the maximum flowrate
condition
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Calibration of SICK USM
1. (20-1600) Nm3/h at SICK and CMS/blow down type facility
2. (80-1000) m3/h@10 bar at CMS
atmospheric conditions
• results agreed well between
SICK and CMS
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10 bar
• repeatability was improved at higher
flowrates
• results were consistent with flowrate
< 400 m3/h
• need further test at higher flowrate
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Calibration SICK USM@CEESI
0.9
10 bar@CEESI_run 1 (P_fix=21.89)
0.8
Pressure
effect?
0.7
0.6
41 bar@CEESI (P_fix=21.89)
10 bar@CEESI_run 2 (P_fix=21.89)
10bar@CMS (P_fix=10.81)
10bar@CMS (P_fix=21.89)
error (%)
0.5
0.4
0.3
0.2
0.1
0
-0.1
0.00E+00
1.00E+06
2.00E+06
3.00E+06
4.00E+06
5.00E+06
6.00E+06
7.00E+06
Re
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Observation
FOR Experience on USM calibration
• SHOULD be no Temperature and little Pressure effects on USM.
Manufacturer info and basic principle of USM
• Year to year variation in 6” USM Transfer standards
• SICK meter appeared consistent, @atm, @blowdown/re-circulating
• Additional tests at CEESI gave different perspectives and need
further investigation on SICK meter
• Need more tests on both 6”TS and SICK USM
FOR High Pressure System
• Increase upstream air storage capacity, reduces pressure and
temperature drops and thus, the time-delay problem of PRT
measurement has been alleviated
• Re-circulating loop a good tool to save calibration time and high
pressure calibration
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Current Progress
• Studying pressure effect on the calibration of an USM by
re-circulating loop
– Replacing working standard for CMS’s re-circulating loop from two
DN100 IRPPs to five DN50 Itron rotary meters:
– Check pressure effect of USMs with re-circulating loop at 10 bar
and 50 bar
MUT
SICK
Rotary Meter
USM
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Thanks for your attention!
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