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Study of staging method for a 25 K two stage pulse tube cooler

Kranthi, JK and Jacob, S and Karunanithi, R and Narasimham, G (2019) Study of staging method for a 25 K two stage pulse tube cooler. In: 27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018, ICEC-ICMC 2018, 3 - 7 September 2018, Oxford.

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Official URL: https://doi.org/10.1088/1757-899X/502/1/012021


Staging method refers to the arrangement of regenerators and pulse tube(s) in a multi stage pulse tube cooler(PTC). This paper describes the study of two staging methods for a 25 K two stage pulse tube cooler. Staging method 1, a thermally coupled, inline staging design, was studied using SAGE and by developing an experimental PTC. A no load temperature of 40.4 K was achieved by the experimental PTC. The effect of regenerator configuration was studied by varying the regenerator length. Experimental results show a detrimental interplay of pressure drop and regenerator effectiveness resulting in higher no load temperatures. Staging method 2, consisting of thermally linked single stage 80 K PTC and two stage 25 K PTC, was studied using a SAGE model. The mass flow from the pressure wave generator is bifurcated to the PTCs; thus reducing pressure drop and regenerator ineffectiveness losses by 79 and 42 respectively. With staging method 2, a design cooling power of 1.98 W at 25 K is obtained.

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: Cryogenics; Drops; Pressure drop; Refrigerating machinery, Cooling power; Multi stage; Pressure wave generators; Pulse tube coolers; Pulse tubes; Regenerator effectiveness; Single stage; Staging-method, Regenerators
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Division of Physical & Mathematical Sciences > Centre for Cryogenic Technology
Date Deposited: 25 Oct 2022 08:34
Last Modified: 25 Oct 2022 08:34
URI: https://eprints.iisc.ac.in/id/eprint/77518

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