Performance of a tapered pulse tube

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In a well instrumented pulse tube refrigerator having 1,500 W of cooling power at 125 K, the authors have measured the figure of merit of a tapered pulse tube at several operating points. At operating points near the operating point for which the taper was designed, the figure of merit is 0.96. This is close to the theoretical optimum figure of merit 0.97 calculated for this pulse tube considering only two loss mechanisms: heat conduction in the metal pulse tube wall and ordinary thermoacoustic heat transport in the gas within a few thermal penetration depths of the wall. At operating ... continued below

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17 p.

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Swift, G.; Allen, M. & Woolan, J.J. February 1, 1998.

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Description

In a well instrumented pulse tube refrigerator having 1,500 W of cooling power at 125 K, the authors have measured the figure of merit of a tapered pulse tube at several operating points. At operating points near the operating point for which the taper was designed, the figure of merit is 0.96. This is close to the theoretical optimum figure of merit 0.97 calculated for this pulse tube considering only two loss mechanisms: heat conduction in the metal pulse tube wall and ordinary thermoacoustic heat transport in the gas within a few thermal penetration depths of the wall. At operating points farther from the design operating point, the measured figure of merit is much lower, as streaming driven convection adds a third loss mechanism.

Physical Description

17 p.

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INIS; OSTI as DE98003368

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  • 10. international cryocooler conference, Monterey, CA (United States), 26-28 May 1998

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  • Other: DE98003368
  • Report No.: LA-UR--97-4713
  • Report No.: CONF-980541--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 645564
  • Archival Resource Key: ark:/67531/metadc691055

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 1, 1998

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 29, 2016, 6:47 p.m.

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Swift, G.; Allen, M. & Woolan, J.J. Performance of a tapered pulse tube, article, February 1, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc691055/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.