CryoMet

Metrology for reliable liquefied energy gases measurement

The project has received funding from the European Partnership on Metrology, co-financed by European Union Horizon Europe Research and Innovation Programme and from the Participating States.

About the project

The fit for 55 package of legislation requires an increased usage of liquefied energy gases to reach 55 % net greenhouse gas emissions reduction by 2030. However, reliable measurement methods for bio-liquefied natural gas (bio-LNG) and liquefied hydrogen (LH2) are not yet fully developed. Bio-LNG is defined here as (predominantly) liquefied methane originating from biomethane and/or biogas and traceable measurements for both it and LH2 are urgently needed across the supply chain. In order to address this issue, this project will develop reference data sets and technical evidence to support the acceptance of measurement methods for (bio-)LNG and LH2. This will include verification of the results and datasets under in-field conditions and by SI-traceable intercomparisons. The project’s outcomes should enable the European liquefied gas metrological framework to be expanded, and new SI-traceable calibration procedures to be developed. The project’s liquefied gas measurement methods and good practice guidance will also be disseminated and promoted to standardisation bodies, the measurement supply chain, and end-users to support their wide uptake.

The objectives

The CryoMet specific objectives are:

1

To determine the measurement reliability and uncertainty of (bio-)LNG flow meters in-field, including (i) 2-phase flow, (ii) meter insulation type, (iii) reproducibility, and (iv) temperature cycles. In addition, to develop traceable (bio-)LNG and LH2 meter diagnostics and demonstrate, using SI-traceable reference data sets, a target accuracy of 0.5 % for (bio-)LNG flow meters. (see WP1(link))

2

To determine the reliability of (bio-)LNG composition measurements under in-field conditions, including sampling errors, and the achievable accuracy of LNG composition measurement equipment. Then to demonstrate, using SI-traceable reference data sets, a target uncertainty of less than 0.3 % (k = 2) for the online determination of LNG density. (see WP2(link to the Wp2))

3

To determine the accuracy of (bio-)LNG in-field temperature measurements, including the impact of static and dynamic effects on the temperature measurement system. Then to demonstrate, using SI-traceable reference data sets, a target uncertainty maximum of 0.5 °C (k = 2), for in-field conditions and for cryogenic temperatures down to -253 °C, applicable for LH2. (see WP3)

4

To perform SI-traceable flow and temperature measurements in LH2 conditions and to develop SI-traceable calibration procedures for LH2 flow, composition, and temperature measurement systems. In addition, to verify the performance of the (bio-)LNG and LH2 metrological infrastructure developed, including through inter-comparisons of the SI-traceable calibration systems. (see WP4

5

To facilitate the take up of the technology and measurement infrastructure developed in the project by the measurement supply chain (accredited laboratories, instrument manufacturers), standards developing organisations (OMIL/TC8, ISO/TC28, CEN/TC408, IEC/TC65/SC65B), the EMN for Energy Gases and end users (e.g. research institutes, plant operators, TSOs/DSOs). (WP5)