Conveners
C1Po3A - Cryogenic Components I
- Robert Duckworth
In recent years, with the widespread adoption of hydrogen as a clean energy source, low-temperature hydrogen turbine expanders have played a crucial role in the production of liquid hydrogen. Currently, there is limited focus on the brake side, despite the interdependence and mutual influence between the brake impeller and the turbine impeller. To improve the efficiency and reliability of...
Pulse tube (or piston) expansion cryogenic refrigerators are a type of refrigeration equipment capable of highly reliable operation in low-temperature environments and are particularly suitable for medium-sized cooling requirements. In this type of refrigerator, intermittent flow cold storage surface heat exchanger is required to improve the refrigeration efficiency. In this research, we...
The storage and transportation of liquid helium inevitably lead to overpressure and leakage due to its extremely low boiling point and high evaporation rate, resulting in helium loss. By introducing cooling through a cryocooler, the thermal losses can be effectively reduced, potentially achieving ZBO(zero-boil-off). However, research on liquid helium lossless technology is still limited. This...
In view of cryocooler-dependent dry cooling of superconducting magnets and systems, efficient heat transfer devices that can function independent of the gravity effect are in high demand. One of the recent candidates gaining popularity are cryogenic pulsating heat pipes (PHP), synonymously called as oscillating heat pipes. These wickless heat pipes, made by simply meandering capillary tubes,...
High speed turbo expanders for hydrogen and helium serve as critical components in large-scale cryogenic systems. Their efficient and stable operation directly determines overall system performance. Due to the low density and high enthalpy drop of hydrogen and helium, turbo expanders must operate at extremely high rotational speeds, to achieve high thermodynamic efficiency. Aerostatic bearings...
