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Optimum operating conditions for an adsorption cryocooler: a case of activated carbon + nitrogen system

Rao, Radhika Rani and Prasad, Madhu and Srinivasan, Kandadai (2005) Optimum operating conditions for an adsorption cryocooler: a case of activated carbon + nitrogen system. In: Cryogenics, 45 (3). pp. 193-197.

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Adsorption cryocoolers are among the possible options for obtaining cryogenic temperatures, in particular for small cooling capacity applications such as cooling of infra red detectors. They need to be optimized for liquid yield. The performance of thermal compressors therein pivots around the adsorption characteristics of the adsorbent + adsorbate combination and how effectively one could pack requisite amounts of adsorbent into a given volume of the compressor housing. In addition, the overall performance of the cooler is a function of limits of operating temperatures and pressures across the compressor. This paper proposes a performance indicator-the product of liquid yield and the uptake efficiency of the compressor-and evaluates its values for various possible operating conditions for one specimen of activated carbon. It is shown that there is a limited domain of operation and that there is a condition of best performance within that domain. (C) 2004 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Publication: Cryogenics
Publisher: Elsevier Ltd.
Additional Information: Copyright of this article belongs to Elsevier Ltd.
Keywords: Packing Density;Performance
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 04 Feb 2010 04:59
Last Modified: 19 Sep 2010 04:56
URI: http://eprints.iisc.ac.in/id/eprint/17265

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