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CEC-ICMC 2019 - Abstracts, Timetable and Presentations

21–25 Jul 2019
Connecticut Convention Center, Level 6
US/Eastern timezone

Conference Management

Session

C1Or1C - Non-Aerospace Cryocooler Modelling and Studies

C1Or1C
22 Jul 2019, 11:00
Level 6, Room 22-23

Level 6, Room 22-23

Conveners

C1Or1C - Non-Aerospace Cryocooler Modelling and Studies

  • Ryan Taylor (Ball Aerospace and Technologies)
  • Wei Dai (Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)

Presentation materials

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  1. 700. C1Or1C-01: CFD study of the 2D gas piston in pulse tube cryocoolers
    Ms Zhimin Guo (School of Mechanical Engineering, Tongji University)
    22/07/2019, 11:00
    Contributed Oral Presentation

    There are three parts of the gas moving through the pulse tube of the pulse tube cryocooler, part I is the gas moving between the cold heat exchanger and the pulse tube, part II is the gas oscillating in the pulse tube all the time, part III is the gas moving between the pulse tube and the warm heat exchanger. The part of the gas that always moves in the pulse tube acts the same function of a...

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  2. 1049. C1Or1C-02: Numerical Modeling and Loss Analysis of Pneumatically-Driven Gifford-McMahon Cryocooler
    Dr Tian Lei (Sumitomo (SHI) Cryogenics of America, Inc.)
    22/07/2019, 11:15
    Contributed Oral Presentation

    Pneumatically-driven displacer mechanisms are widely used in Gifford-McMahon (G-M) cryocoolers. Particularly for large size G-M cryocoolers, this type of drive is preferable compared to the scotch yoke type, as only a small motor is required for driving the rotary valve and, therefore, the entire cryocooler can be very compact. Though various numerical models of G-M cryocoolers have been...

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  3. 1043. C1Or1C-03: A Second Law Study of the Regenerators in Cryocoolers based on Pore-level Analysis of Entropy Generation
    Tao Fang (Georgia Institute of Technology)
    22/07/2019, 11:30
    Contributed Oral Presentation

    Regenerators are key components of pulse tube cryocoolers and losses in regenerators have a significant effect on the performance of cryocoolers. In previous studies, the efficiency of regenerators have been characterized mostly based on the first law of thermodynamics, and second-law analyses have been based on exergy considerations or irreversibility associated with macroscopic flow...

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  4. 786. C1Or1C-04: An experimental investigation on finned heat exchangers with cryogenic helium oscillating flow
    Mr Jiale Huang (Zhejiang University)
    22/07/2019, 11:45
    Contributed Oral Presentation

    The space-cycle averaged Nusselt number is used to characterize the heat transfer process of cold end heat exchanger in cryocoolers working with cryogenic helium oscillating flow. An experimental setup for cryogenic oscillating flow heat transfer measurement is designed and established to simulate actual operating conditions of cold-end heat exchanger of a regenerative refrigerator. The...

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