Title:
Heat Rejection Capacity in Miniature Thermoacoustic Expanders at Cryogenic Temperature 77 K

dc.contributor.author Hu, Zhimin en_US
dc.contributor.author Roberts, T. en_US
dc.contributor.corporatename CryoWave Advanced Technology, Inc. en_US
dc.contributor.corporatename Air Force Research Laboratory (Kirtland Air Force Base, NM) en_US
dc.date.accessioned 2011-05-12T20:14:36Z
dc.date.available 2011-05-12T20:14:36Z
dc.date.issued 2008-05
dc.description Presented at the 16th International Cryocooler Conference, held May 17-20, 2008 in Atlanta, Georgia. en_US
dc.description.abstract Miniaturized thermoacoustic expanders MTAEs are a new type of expander designed to improve the cooling efficiency of recuperative type cryocoolers without sacrificing their reliability and simplicity. Experimental studies have demonstrated the feasibility of MTAEs, including their ability to remove heat from the expansion of a DC cold-stage flow to a high-temperature reservoir. The heat pumping from the cold-stage to a hot sink by an MTAE relies critically on the behavior of nonlinear wave systems created in miniature-scale channels (several hundreds microns) inside resonant tube bundles of MTAEs. This paper presents an experimental investigation of this heat rejection capacity between a low temperature source and a much higher temperature sink and the influence of such heat energy pumping on the cooling performance of an MTAE operated at a cryogenic temperature of 77�K. The objective is to explore this technology�s feasibility in both scaled down and cryogenic temperature conditions. The characteristics of acoustic wave systems and the cooling power achieved using helium in the MTAE (170�mg/s) with different supply pressures and hot reservoir temperatures are reported. The observations and challenges of the thermoacoustic streaming phenomenon and modeling in miniature or micron-scale channels is also discussed. en_US
dc.identifier.isbn 978-1-934021-02-6
dc.identifier.uri http://hdl.handle.net/1853/38854
dc.language.iso en_US en_US
dc.publisher Georgia Institute of Technology en_US
dc.publisher.original ICC Press en_US
dc.relation.ispartofseries Cryocoolers 16. J-T and sorption cryocooler developments en_US
dc.subject J-T and sorption cryocooler developments en_US
dc.subject Miniaturized thermoacoustic expanders en_US
dc.subject Cooling efficiency en_US
dc.subject Thermoacoustic streaming en_US
dc.title Heat Rejection Capacity in Miniature Thermoacoustic Expanders at Cryogenic Temperature 77 K en_US
dc.type Text
dc.type.genre Proceedings
dspace.entity.type Publication
local.contributor.corporatename Cryo Lab
local.relation.ispartofseries International Cryocooler Conference
relation.isOrgUnitOfPublication e67c90ea-6bb5-40f5-9d25-5bf484c9e22a
relation.isSeriesOfPublication d45e414a-b7fa-4f13-92d2-61f4f7ba805a
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