Cryogenic testing of upstream flow disturbances now completed for 4 industry-standard LNG flow meters

The effect of upstream flow disturbances was tested on 4 flow meters from 4 different LNG flow meter manufacturers in VSL’s cryogenic research and calibration facility using liquid nitrogen. The upstream flow disturbances investigated comprised a blocking plate and a double bend, and their effects were contrasted against “ideal circumstances” with no upstream flow disturbance and insulated flow meters. In addition, the effect of meter insulation was investigated. The calibration curves of both ultra-sonic and Coriolis meters exhibit good repeatability and typical behavior for the flow meter type. This gives confidence in the facilities master meter calibration method. The results will be published at a later stage. The results will be compared with the water tests which were already successfully completed by NEL, and which were performed in the same metering setups to enable a systematic comparison of flow meter performance under water and cryogenic conditions. Tests on another 2 flow meters are planned, and when these are completed comparison of water and liquid nitrogen data will be started to fully understand the influence of flow disturbances on measurement uncertainty.

The Cryogenic Research and Calibration facility. Components are: 1) Liquid nitrogen storage tank, 2) cryogenic liquid storage tank, 3) primary Standard for mass flow utilizing the gravimetric method, 4) meters-under-test section, 5) working standards, a set of Coriolis mass flow meters, 6) heat exchangers and pumps, 7) Nitrogen warmer and 8) control room.

Milestone ElectroChemical Capacitive gas sensor

In 2018 TNO developed new sensor chips that can be added to the existing multigas sensor array for the measurement of the higher hydrocarbons in LNG. For each of the target gasses in the LNG (i.e. methane, ethane, propane, iso & n-butane, iso & n-pentane and nitrogen) a sensor chip is required. These chips consist of an interdigitated electrode, coated with a responsive coating. This coating absorbs the gas and changes its dielectric constant, which is measured by the electrode. The new butane and pentane responsive coatings are made from mixtures of highly porous ceramic particles embedded in a highly permeable polymer matrix.  Responses of the sensor to butane and pentane concentration variations of 0.1 vol% can be very well distinguished.

The final LNG composition sensor has ten coated electrodes, a temperature and a pressure sensing chip, which enables the calculation of the full LNG composition.

The sensor will be validated in laboratory gas mixtures and will be subsequently inserted in the fuel line of a real test engine.

Testing of new metering skids has been completed by NEL

The excellent collaboration with different flow meter manufacturers in this project resulted in securing six LNG flow meters of different sizes and types, and enabled NEL to design and fabricate suitable metering setups to test these meters in the water test facility under different upstream flow disturbances.

NEL’s UKAS accredited Water Flow Measurement Facility.

A document describing the details of the water test programme including the test parameters and test setups was prepared and approved. Testing at NEL then started in June 18 and successfully completed in July 2018. A total of 28 test cases have been generated covering different upstream disturbances and test temperatures. The metering setups were then shipped to VSL to prepare for the LNG testing.

NEL also completed the analysis of the water test data which have been shared with the project partners. The LNG test programme including test parameters and test setup at the LNG Research and Calibration facility was finalized and approved.  The LNG testing is scheduled to start in May 2019. Once completed, comparison of water and LNG data will be started to fully understand the influence of flow disturbance on measurement uncertainty and provide recommendations to reduce this uncertainty below 0.5%.

Flow disturbances considered in this project.

Metrology for LNG Workshop and Training, 25-26 October 2018, Aberdeen

The LNG 2018 Workshop will take place 25-26 October 2018, Ardoe House Hotel, Aberdeen, Scotland

The workshop for the LNG3 project builds on the success of the previous workshops held during the first and second LNG projects between 2010 and 2017. Each of these workshops attracted over 80 participants from all over the world and presented an excellent platform for networking and sharing information.

More information, and registration here

Upcoming tests

  • Water tests at NEL, scheduled
  • LNG tests at VSL, preliminary schedule

Water tests are scheduled for 15 June – 15 July.
According to the proposed preliminary test program, LNG tests are scheduled for September ~ October -December ~ January 2019 .

NEL Introduced the LNGIII project at Kuwait 3rd Flow Measurement Conference and ADIPEC 2017

NEL attended the ADIPEC (The Abu Dhabi International Petroleum Exhibition & Conference), 13-16 Nov 2017 as part of SDI (Scottish Development International) pavilion. This is one of the largest and most influential oil and gas industry exhibition and conference and NEL had the opportunity to introduce the LNGIII project to many key participants through one to one discussions.

NEL introduced the LNGIII projectNEL also attended Kuwait 3rd Flow Measurement Technology Conference held between 19th and 21st Nov 2017. An overview of the LNGIII project was presented by Asaad Kenbar. The presentation covered a brief introduction to EMPIR, objectives of LNGIII, approach to achieve these objectives, brief description of each work package, test programme and progress to date. The presentation highlighted the significant contribution of the EMPIR project to the development of measurement traceability for LNG and the long-term vision to achieve this traceability for LNG custody transfer applications. It also highlighted the importance of this work to develop the required reference measurement systems and generate supporting data to enable the development of the new international standard for LNG dynamic flow measurements under ISO TC28/WG20A.

Attending and presenting at these two events have attracted many interesting questions and reinforced the importance of EMPIR support to address the EU’s Grand Challenges and to progress fundamental measurement science.

LNGII presentation rewarded on the International Congress of Metrology (CIM)

Among 192 oral and poster presentations Cesame-Exadebit has been rewarded for the oral presentation of a scientific article on a work done in the JRP project ‘LNG II’.

From the Congress article we read:
“The closure of CIM was also an opportunity to reward two high-level technical presentations for the quality of their content: The best oral, by Henri Foulon of Cesame Exadébit: Measuring cryogenic flow using laser Doppler velocimetry.»

Click here to see the summary document from the Congress