The CryoMet-project supports the European “Fit for 55” initiative, which aims to reduce greenhouse gas emissions by 55% by 2030 – among other things through the increased use of liquefied energy gases such as bio-LNG and liquefied hydrogen (LH₂). To enable this transition, CryoMet is developing traceable measurement methods, reference data sets, and calibration procedures for these cryogenic energy carriers. The project results will be validated under real-world conditions through comparative measurements between metrology institutes, thereby strengthening the European metrological framework and providing guidelines for industry and standardization organizations.
The Institute of Thermodynamics plays an active role in the CryoMet project, participating in Work Package 2 (WP2) and leading Work Package 4 (WP4).
WP2 Reliability of Measurements of the Composition and Density of LNG and (bio)LNG
This work package aims to evaluate the reliability of (bio)LNG composition measurements under field conditions—including sampling influences and measurement accuracy—and to achieve a target uncertainty of 0.3% (k = 2) for online determination of LNG density.
The Institute of Thermodynamics is contributing to this by assessing the feasibility of achieving this uncertainty target by means of direct density measurements. This work supports the establishment of SI-traceable, high-accuracy methods for determining LNG density and enables more reliable energy and mass flow calculations along the entire LNG supply chain.
WP4 SI-traceable calibration methods for liquefied energy gases
The aim of this work package is to establish SI-traceable calibration methods for flow, composition, and temperature measurements under liquefied hydrogen (LH₂) conditions. In addition, the performance of the newly developed metrological infrastructure will be validated by comparative measurements involving both (bio)LNG and LH₂ calibration systems.
As work package leader, the Institute of Thermodynamics coordinates the activities of all WP4 partners and contributes directly to task 4.2, which focuses on determining the isomer composition of liquid hydrogen (para- and ortho-hydrogen) using two complementary methods: Raman spectroscopy and sound velocity measurements.
The results form the basis for SI-traceable calibration methods for determining the isomeric composition of LH₂ and provide essential reference data for future hydrogen metrology. In this way, they support the safe and efficient use of liquefied hydrogen as a clean energy carrier.
Project Partners
VSL, LUH, CESAME, CMI, FSB, NEL, NPL, PTB, RISE, TUBITAK, EffecTech, GERG, IC, IFE, NLR, TU-IL, UL, Endress+Hauser, EHFL, Emerson M.
Project Funding
The 24GRD07 CryoMet project has received funding from the European Partnership on Metrology (EURAMET), co-financed by the European Union's Horizon Europe research and innovation program and by the participating countries.
Project homepage: cryomet.eu
30823 Garbsen
30823 Garbsen
