Conveners
C1OrB - Expanders II
- Lars Blum (Linde Kryotechnik AG)
- Venkatarao Ganni (FRIB/MSU)
Turboexpander is a key focus area for Bhabha Atomic Research Centre (BARC), Mumbai, India in the program for development of helium refrigerators and liquefiers for intra departmental requirements. To start with, a turbine impeller with major diameter 16 mm and design speed of 264,000 RPM, suited for use in the 1st stage of a modified Claude cycle/ reverse Brayton cycle based standard helium...
Strong of 60 years of innovation and design in the field of cryogenic turbomachines, Air Liquide Advanced Technologies is constantly developing new products. Magnetic bearings technology is used since the mid 80’s for specific applications where reliability and efficiency is a key issue. 50 cold compressors, 5 pumps and 5 high power turbomachines (moto-compressors, moto-turbo-compressors and...
Superconducting bearings are used in a number of applications for high speed, low loss suspension. Most of these applications have a warm shaft and require continuous cooling, which leads to additional power consumption.
Therefore, it seems advantageous to use these bearings in systems that are inherently cold. One respective application is a submerged pump for the transfer of liquid helium...
Oil contamination is a re-occurring issue in cryogenic helium applications resulting in reduced performance and eventually the need for thorough cleaning of the coldbox internals. Main sources are the oil-injected recycle gas screw compressors. Although the systems are equipped with oil removal systems, mal-operation, improper design, and particularly the carry-over of the residual content of...
The indigenous design and development of helium turbines of 500 W/4.5 K cryogenic system have been started at ASIPP, China. This paper briefly discuses the design process and the fabrication drawings for the whole helium turbine system, which includes the turbine wheel, nozzle, diffuser, shaft, brake compressor, two types of bearing, appropriate housing and some other necessary parts. With...
