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Graphene-based Multi Stage Knudsen Compressor for a Joule-Thomson Cryocooler: A Spacecraft Thermal Control System
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Use of cryo cooling systems in space applications to increase the efficiency of electronic components, reduce thermal noise and to facilitate super conducting materials is increasing with the technology boom. Proposals to improve the vibration footprint of cryocoolers is often welcomed. In this paper a Joule Thomson closed cooling cycle is envisioned with the use of Knudsen compressor that does not include any moving parts. Taking advantage of the graphene properties, it is employed as a thermal transpiration assistant for the Knudsen diffusion across a nanoporous material. Initially, this Knudsen compressor is conceptually designed. It is then implemented and prepared for testing after solving several difficulties associated with it. Creep flow is examined using computer simulation and validated using a laboratory test setup. Insights on other parts of the JT cryocooler which are required to be integrated with this Knudsen compressor was presented

Place, publisher, year, edition, pages
Keyword [en]
Graphene, Joule Thomson, cryocooler, Knudsen diffusion, Knudsen compressor, Cryogenics, thermal control system
URN: urn:nbn:se:ltu:diva-25636OAI: diva2:998740
External cooperation
Educational program
Space Engineering, master's level
Available from: 2016-10-03 Created: 2016-09-30 Last updated: 2016-10-03Bibliographically approved

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