Cryogenic refrigeration using an acoustic stirling expander.
| dc.contributor.author | Emery, Nick | |
| dc.date.accessioned | 2011-07-15T02:15:18Z | |
| dc.date.available | 2011-07-15T02:15:18Z | |
| dc.date.issued | 2011 | en |
| dc.description.abstract | A single-stage pulse tube cryocooler was designed and fabricated to provide cooling at 50 K for a high temperature superconducting (HTS) magnet, with a nominal electrical input frequency of 50 Hz and a maximum mean helium working gas pressure of 2.5 MPa. Sage software was used for the thermodynamic design of the pulse tube, with an initially predicted 30 W of cooling power at 50 K, and an input indicated power of 1800 W. Sage was found to be a useful tool for the design, and although not perfect, some correlation was established. The fabricated pulse tube was closely coupled to a metallic diaphragm pressure wave generator (PWG) with a 60 ml swept volume. The pulse tube achieved a lowest no-load temperature of 55 K and provided 46 W of cooling power at 77 K with a p-V input power of 675 W, which corresponded to 19.5% of Carnot COP. Recommendations included achieving the specified displacement from the PWG under the higher gas pressures, design and development of a more practical co-axial pulse tube and a multi-stage configuration to achieve the power at lower temperatures required by HTS. | en |
| dc.identifier.uri | http://hdl.handle.net/10092/5306 | |
| dc.identifier.uri | http://dx.doi.org/10.26021/1915 | |
| dc.language.iso | en | |
| dc.publisher | University of Canterbury. Mechanical Engineering | en |
| dc.relation.isreferencedby | NZCU | en |
| dc.rights | Copyright Nick Emery | en |
| dc.rights.uri | https://canterbury.libguides.com/rights/theses | en |
| dc.subject | pulse tube | en |
| dc.subject | Stirling | en |
| dc.subject | Sage | en |
| dc.subject | pressure wave generator | en |
| dc.subject | cryocooler | en |
| dc.subject | cryogenics | en |
| dc.subject | refrigerator | en |
| dc.title | Cryogenic refrigeration using an acoustic stirling expander. | en |
| dc.type | Theses / Dissertations | |
| thesis.degree.discipline | Mechanical Engineering | |
| thesis.degree.grantor | University of Canterbury | en |
| thesis.degree.level | Masters | en |
| thesis.degree.name | Master of Engineering | en |
| uc.bibnumber | 1654122 | |
| uc.college | Faculty of Engineering | en |
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