In this work we consider multi-mode, multi-scale heat transfer within a cryogenic storage system and demonstrate the importance of using gaseous conduction functions derived from low pressure gas theory in converging to published experimental data. Through validation of modeling data against experimental cryostat data available in the academic literature, we develop the framework for...
With the growing interest in utilizing liquid hydrogen to decarbonize the aviation and transportation industries, understanding the effective thermal conductivity of insulations utilized in vacuum-jacketed liquid hydrogen vessels is critical to predicting heat leak and boil-off characteristics. Moreover, the ability to predict the transient heat flux during a loss of vacuum event is a critical...
Process line rupture leading to pressurization of the vacuum enclosure with released gas is one of the failure cases that must to be analysed during the design of the cryogenic systems and devices. The selection of the number and size of the pressure relief devices (PRD) that protect the enclosure against excessive overpressure requires, among others, an assessment of heat transfer between...
The ability of porous media to wick cryogenic liquids is critical for applications such as propellant management devices in space and so-called dry-shippers. A dry-shipper is a vacuum-insulated container lined internally with a porous material saturated with liquid nitrogen, as required by aviation safety regulations. Substantial evaporation during the absorption of cryogenic liquids...
Density wave oscillations (DWO) are one of the most common instability types in flow boiling systems. In liquid hydrogen (LH2) pipe flow with heat ingress, DWO can cause large fluctuations of temperature, pressure, void fraction, and flow rate, which puts strain on the system and makes LH2 transfer processes unstable. Predicting the onset of these oscillations and the magnitudes is important...
Viscosity data for natural gas mixtures in particular with helium components are insufficient in literature, which creates an obstacle to the development of a corresponding mixture viscosity model or correlation. Precise viscosity measurement of cryogenic fluids including methane, ethane and their mixtures with other rare components requires a viscometer capable of operating at high pressures...
