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.
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Abstract
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 |
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