High-Pressure Gas Facility Upgrade to CO2 Ready Early 2024

24 August 2023

High Pressure Gas CO2 Calibration Facility

As part of our commitment to support the energy transition and the emerging carbon capture utilisation and storage (CCUS) industry, TÜV SÜD National Engineering Laboratory is developing a physical UK national standard facility to provide flow measurement traceability for gaseous carbon dioxide (CO2). Funded by DSIT (the UK Government’s Department for Science, Innovation and Technology) via the National Measurement System, the facility is nearing completion in East Kilbride, Glasgow, Scotland.

Gabriele Chinello, Head of CCUS, commented:

“At TÜV SÜD, we are proud to be able to support CCUS projects with our extensive experience, consultancy services and cutting-edge facilities. We’re currently nearing completion of a physical UK national flow standard facility to provide flow measurement traceability for gaseous carbon dioxide. The facility is scheduled to be up and running in the coming months, and its first job is already booked in where it will be used for some EU-funded research. It should be available for use by industry in early 2024. We are fully equipped to play a pivotal role in delivering the UK government's commitment to a greener, more sustainable future and energy security strategy.”

Currently, the facility (formerly known as the Wet-Gas Facility) uses nitrogen gas as the test fluid and is being adapted to be permanently used with gaseous CO2. The upgraded facility will be called the High-Pressure Gas Loop and phase one of the upgrade is due to be completed by September 2023.

The High-Pressure Gas Facility will provide national standard traceability for gaseous phase CO2 in terms of:

  • Fiscal/custody transfer flow meters
  • Process control
  • Carbon accounting
  • System integrity monitoring (safety)

It will also offer research and development infrastructure for manufacturers and research institutions.

Following completion of this phase one upgrade, a test campaign with different metering technologies will take place in autumn 2023 as part of the EU funded project “Metrology for decarbonising the gas grid”.

The facility will be available for commercial calibrations from early 2024, providing the following testing capability:

Flow rates

  • CO2: 20 – 1000 m3/h
  • Nitrogen: 20 – 1600 m3/h

Pressure & Temperature

  • CO2: 0 – 45 bar.g
  • Nitrogen: 0 – 60 bar.g
  • Temperature range: 4 – 30 °C

Device Under Test

  • Meter size: 1 – 12 inch
  • Data/comms protocol:
  • Regular protocols: Pulse, mA, Foundation Fieldbus, ModBus and Differential Pressure

Target Uncertainty

  • ± 0.35 – 0.45 % (k = 2)

In phase two of the upgrade, the operating maximum flow rate will increase to 1600 m3/h with CO2 and to 2500 m3/h with nitrogen. Facility uncertainty will also be lowered to ≤ ± 0.25 % (k = 2) with the installation of new reference meters.

In parallel with the large-scale High-Pressure Gas Facility, TÜV SÜD National Engineering Laboratory is building a small-scale PVt (pressure, volume, temperature) primary standard for multiple gases including CO2.

Russell Brown, CCUS Flow Measurement Consultant, is investigating the transferability of calibration from nitrogen to gaseous CO2 by testing 1- to 2-inch flow meters against the small-scale PVt primary standard. This will be one of the first research projects in this area to be completed worldwide at a traceable calibration laboratory against a primary standard.

Why Choose TÜV SÜD for CCUS Services?

There are many CCUS measurement challenges anticipated due to both the physical properties of carbon dioxide (CO2), and the processes involved in CCUS projects. Find out more about our CCUS measurement services.

TÜV SÜD is also constructing the world’s first primary standard for liquid CO2 as part of a Horizon Europe project after receiving funding from UK Research and Innovation (UKRI).

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