ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Design and component development of a 17 l/d liquefier for helium recondensation

Kranthi Kumar, J and Jacob, S and Karunanithi, R and Narasimham, G (2019) Design and component development of a 17 l/d liquefier for helium recondensation. In: 27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018, ICEC-ICMC 2018, 3 - 7 September 2018, Oxford.

ICEC-ICMC_2018.pdf - Published Version

Download (4MB) | Preview
Official URL: https://doi.org/10.1088/1757-899X/502/1/012010


This paper describes the design and component development of a 17 l/d liquefier for helium recondensation. The liquefier uses an oil-free linear motor compressor with suction and discharge pressures at 1 and 22 bar respectively. The liquefier is a hybrid cryocooler consisting of an interchanging component made up of recuperative heat exchangers, an 80 K pulse tube cooler (PTC) and a 25 K two stage PTC. The cooling powers required of the PTC's are 14.2 W at 80 K and 1.6 W at 25 K. The primary cooling mechanism is two stage J-T expansion at 22 bar and 11 bar resulting in liquefaction with a liquid fraction of 0.19. This corresponds to a cooling power of 0.54 W at 4.2 K and a liquefaction rate of 17.8 litres per day. An overview of the design and development of the PTC's, heat exchangers and JT valves is presented.

Item Type: Conference Paper
Publication: IOP Conference Series: Materials Science and Engineering
Publisher: Institute of Physics Publishing
Additional Information: The copyright for this article belongs to the Authors.
Keywords: Cooling; Cryogenics; Heat exchangers; Helium; Linear motors; Liquefaction; Meteorology, Cooling power; Design and Development; Discharge pressures; Liquid fraction; Primary cooling; Pulse tube coolers; Recondensation; Recuperative heat exchangers, Cooling systems
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Division of Physical & Mathematical Sciences > Centre for Cryogenic Technology
Date Deposited: 25 Oct 2022 08:37
Last Modified: 25 Oct 2022 08:37
URI: https://eprints.iisc.ac.in/id/eprint/77520

Actions (login required)

View Item View Item