Design, construction and installation of Cignus mass-flow meter prototype for CO2-testing at Equinor P-Lab.
Cignus Instruments AS
10/22 - 12/23
Cignus Instruments AS is developing a new and patented concept for mass flow metering of liquids and gases with special advantages within emerging H2 and CCS value chains.
Within current and future CCS projects, the industry will need measurement principles with sufficiently high accuracy, high rates, and therefore large dimensions, as well as measurement of direct mass flow. As of today, there are major limitations on the dimensioning of mass flow meters for CCS, where no existing technologies fully satisfy all specification requirements. Traditional Coriolis meters are considered the most accurate technology, but have limitations when scaling to large dimensions, especially at high operating pressures. In addition, this technology has a significant internal pressure drop causing challenges when measuring liquids close to the boiling point with the risk of cavitation and thus increased measurement uncertainty.
Cignus’ measurement principle provides simplified and more accurate CO2 metering when scaling to large pipelines and high operating pressures, and is also suited for seabed installation. An important first step is to test an industrial prototype with CO2, in both gas, liquid and supercritical phase, for further development of the principle for use in the CCS industry.
The project objective is to demonstrate the technological advantages of Cignus technology for a simpler and more accurate mass flow measurement of CO2 when scaling up to large-scale CCS facilities, and experimentally verify that Cignus’ solution has the potential to close technology gaps through the CCS value chain.
Main activities in the project have been the design and construction of an industrial prototype CO2-meter, development of electronics and software algorithms for the instrument, adaptation and installation of the instrument in a semi-industrial test loop at Equinor P-Lab, as well as conducting a dedicated CO2 test campaign in both gas, liquid and supercritical phase. A successful CO2 test campaign at Equinor P-Lab will provide valuable data to accelerate the development of the final product and for industry to adopt the technology.
What has the project achieved
The prototype CO2 meter built is completed and installed in the test loop at Equinor P-Lab. The test campaign is planned in October/November 2023, and the project is thus not completed. The prototype has previously been tested in water and nitrogen flow at independent calibration laboratories, and have demonstrated accuracy potential comparable to traditional Coriolis meters. In addition, characterization in CO2-flow at the IFE Falcon loop has demonstrated a pressure drop through the meter limited to a few millibars at full flow rate. This is approximately 100 times lower than the pressure drop through a traditional Coriolis meter with similar flow-range, and a very important result to minimize the risk of boiling and thus increased measurement uncertainty when measuring CO2.
The next step in the development is to build an upscaled CO2 meter for installation in a large-scale CCS pilot plant, such as Northern Lights phase 1, or similar CCS pilot plant during 2024. The motivation for this is earliest possible test of our technology in a scaled-up installation during continuous operation, thereby gaining the most possible field experience for new metering technology.
In parallel with such a pilot installation, we are planning for the construction and qualification of the final product for installation in large-scale CCS applications from 2026.
Caseworker in CLIMIT
Ernst Petter Axelsen
firstname.lastname@example.org +47 98 20 86 18