Additive manufacturing of a compact flat-panel cryogenic gas-gap heat switch

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Abstract

State-of-the-art heat switches are only rarely employed in thermal system architectures, since they are rather bulky and have a limited thermal performance (expressed as the heat transfer ratio between the "On" and "Off" state). Using selective laser melting additive manufacturing technology, also known as 3D printing, we developed a compact flat-panel gas-gap heat switch that offers superior thermal performance, is simpler and more economic to produce and assemble, contains no moving parts, and is more reliable because it lacks welded joints. A prototype measuring 5×5×1 cm3 outer dimensions is developed with an integrated coolant heat sink to assess the feasibility of the technology. Later a second prototype measuring 3.2 mm thick, 10 cm by 10 cm frontal area panel is developed. An on-off heat conductance ratio of about 45 is measured at 100 K, and the on-conductance is 4.5 W/K. In addition to being compact, this type of heat switch has a large on-conductance compared to other types of cryogenic heat switches. This opens doors to utilize the heat switch for cryogenic temperature control applications. © 2016, International Institute of Refrigeration. All rights reserved.
Original languageEnglish
Title of host publicationRefrigeration Science and Technology
Place of PublicationBucharest
Pages134-142
DOIs
Publication statusPublished - 22 Jun 2016
Event1st International Conference IIR of Cryogenics and Refrigeration Technology, ICCRT 2016: Cryogenics and Refrigeration Technology - The Hotel Capitol, Bucharest, Romania
Duration: 22 Jun 201625 Jun 2016
Conference number: 1
http://iccrt2016.criofrig.ro/

Conference

Conference1st International Conference IIR of Cryogenics and Refrigeration Technology, ICCRT 2016
Abbreviated titleICCRT
CountryRomania
CityBucharest
Period22/06/1625/06/16
Internet address

Keywords

  • IR-101040
  • METIS-317637

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