We present the design of a modular test bench to investigate the electrical and thermal performance of aviation-relevant power cables and terminations under a wide range of steady-state or dynamic loading conditions.
A promising route towards sustainable aviation combines LH2, fuel cells and compact electric motors linked by a low-weight cryogenic distribution network that may consist of...
The rapid expansion of cryogenic technologies, such as quantum computing, necessitates robust, scalable, and high-throughput cryogenic testing infrastructure. As these systems transition from prototypes to commercial products, a significant bottleneck emerges in the need for efficient, production-level testing of numerous components at low temperatures. While many cryogenic systems are...
Cryocoolers are increasingly favored over baths or forced-flow cooling providing heat removal and thermal stability for magnets made of High Temperature Superconductor (HTS). Efficient heat transfer between magnet and cryocooler is crucial to the operation of such a system. Compared to conventional thermal buses, which are typically made of solid materials such as high-purity copper braids,...
The cryogenic re-liquefaction of Boil-Off Gas (BOG) is a critical step in LNG infrastructure, where methane vaporized due to unavoidable heat ingress must be recovered to mitigate energy losses and reduce greenhouse gas emissions. Methane's high global warming potential—over 80 times greater than that of CO₂ over a 20-year horizon—makes its release particularly concerning from both...
Regenerators are an integral part of regenerative-type cryocoolers, such as pulse tube, Gifford-McMahon cryocoolers, etc. The main function of a regenerator is to store and release heat during the cyclic operation of cryocoolers. The performance of the regenerator directly influences the performance of the cryocooler. Therefore, regenerators should be designed and optimised carefully. The...
ABSTRACT- POSTER
Electric driven and low heat load valves for liquid helium applications
Leire Colomo, Ander Gabirondo 1)
1) AMPO Poyam Valves, ES- 20213 Idiazabal, Gipuzkoa, Spain
As the energy sector advances toward greener and more efficient technologies, liquid helium is playing a central role in enabling high-performance cryogenic systems. Its use is critical in superconducting...
The regasification of cryogenic liquids, such as liquefied natural gas (LNG), liquid hydrogen (LH₂), and industrial gases like nitrogen and oxygen, offers an unique opportunity for energy recovery during their transition from liquid to gas and subsequent gas heating to ambient temperature. Liquefaction of gases for their transport and storage occurs at extremely low temperatures and requires...
In macroscopic solid-state thermal diodes (MSTDs), spatial and temperature asymmetry arises from combining two materials whose thermal conductivities vary differently with temperature [1]. These devices offer strong potential for passive directional heat control in cryogenic environments. However, current state-of-the-art MSTDs exhibit rectification factors (RF) that remain too low for...
The emergence of the liquid hydrogen (LH2) industry promises transformative potential across sectors like energy storage, propulsion, and synthetic fuels. However, the complex thermophysical behaviour of LH₂ — applicable to production, storage, transportation, distribution and end use — requires deeper understanding to enable efficient system design. Some examples include cryogenic phase...
This research presents a numerical investigation into the multiphase behaviour of cryogenic hydrogen gas jets released into ambient air, with particular attention to the liquefaction of atmospheric water vapour induced by strong shear. The simulations are conducted using a computational fluid dynamics (CFD) solver developed within a finite volume framework, incorporating a hybrid Noble-Abel...
This paper presents the development and experimental characterization of a novel piezoelectric cryogenic heat switch based on mechanical contact. The switch is designed for applications requiring dynamic and precise thermal control between 60 K and 120 K, where low parasitic heat loads, compactness, and long-term stability are crucial. Such requirements are increasingly relevant in quantum...
The push toward net-zero aviation has increased the requirement for propulsion technologies that reduce carbon emissions without compromising performance. Hydrogen is a clean energy carrier for
zero-carbon flight, but its combustion in gas turbines presents challenges such as NOx emissions. In contrast, Solid Oxide Fuel Cell-Gas Turbine (SOFC-GT) hybrid systems offer a high-efficiency and...
Hydrogen is increasingly recognized as a cornerstone of the transition to sustainable energy systems. Storing hydrogen in liquefied form (LH₂) is particularly advantageous due to its relatively high energy density and scalability for storage and transport. However, managing boil-off rates (BOR) during storage and transportation remains a significant challenge. Hydrogen boil-off leads to safety...
High magnetic fields, combined with low temperatures, are an essential tool for neutron spectroscopy. Together, these provide essential information about magnetic dynamics, which is invaluable for the understanding of phenomena such as spin liquids and frustrated magnetism, quantum criticality, excitations in multiferroics, and many other key problems in condensed matter physics.
CSPEC and...
As the hydrogen market expands, the need for efficient distribution of liquid hydrogen (LH$_{2}$) becomes increasingly important. The potential utilisation of liquid hydrogen in mobile applications or as an energy import vector is subject of current investigations. Reducing flash gas losses during LH$_{2}$ transfer and ensuring adequate pressurization of downstream applications, such as fuel...
