{"title":"Acoustic expanders for use in recuperative cryocoolers","authors":"Jacob L. Adams, J. G. Brisson","doi":"10.1088/1757-899x/1301/1/012134","DOIUrl":null,"url":null,"abstract":"An acoustic expander has been developed for use in recuperative cryocoolers. The acoustic expander uses reed-valves to generate a standing acoustic wave from a continuously expanding flow. The mechanical energy from the wave is passively dissipated to the ambient environment. The acoustic expander does not require complex moving parts or control mechanisms at low-temperature; in contrast to piston- or turbo-expanders that require moving displacers or spinning shafts. This expander has demonstrated isentropic expansion efficiencies of 50% for a pressure ratio of 1.4 and expansion efficiencies of 40% for a pressure ratio of 1.9 with air as the working fluid.","PeriodicalId":14483,"journal":{"name":"IOP Conference Series: Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IOP Conference Series: Materials Science and Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/1757-899x/1301/1/012134","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
An acoustic expander has been developed for use in recuperative cryocoolers. The acoustic expander uses reed-valves to generate a standing acoustic wave from a continuously expanding flow. The mechanical energy from the wave is passively dissipated to the ambient environment. The acoustic expander does not require complex moving parts or control mechanisms at low-temperature; in contrast to piston- or turbo-expanders that require moving displacers or spinning shafts. This expander has demonstrated isentropic expansion efficiencies of 50% for a pressure ratio of 1.4 and expansion efficiencies of 40% for a pressure ratio of 1.9 with air as the working fluid.