Skip to main content
SpringerLink
Log in

Natural Circulation Flow of Cryogenic Liquid for Superconducting Magnet Applications

  • Original Paper
  • Published:
Journal of Superconductivity and Novel Magnetism Aims and scope Submit manuscript

Abstract

An experiment to investigate the natural circulation of cryogenic liquid has been performed. The study is motivated mainly by our recent development of cryogenic cooling system for prototype superconducting cyclotron without any circulating pump. In the natural circulation loop system, a cooling channel is attached on the outer surface of the aluminum block and the liquid nitrogen passes through inside of the channel to cool the block indirectly. A cryocooler as a heat sink is located at the top to recondense cryogenic vapor coming from the aluminum block in which electrical heater is installed as a heat source. The main dimensions are determined using the relevant analysis, and the natural circulation loop is successfully fabricated. The temperature distributions in the loop are measured during initial cool-down process and in steady state, from which the modified Grashof numbers are calculated and compared with the existing correlation estimated with one-dimensional analysis for steady state flow.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

References

  1. Muller, K.A., Bednorz, J.G.: The discovery of a class of high-temperature superconductors. Science 237, 1133–1139 (1987)

    Article  ADS  Google Scholar 

  2. Kimura, H., Honda, K., Hayashi, H.: Test results of a HTS power transformer connected to a power grid. Physica C 372, 1694–1697 (2002)

    Article  ADS  Google Scholar 

  3. Kang, H.G., Kim, H.J., Bae, D.K.: Subcooled nitrogen cryogenic cooling system for superconducting fault current limiter by GM-cryocooler. Cryogenics 45, 65–69 (2005)

    Article  ADS  Google Scholar 

  4. Vijayan, P.K.: Experimental observations on the general trends of the steady state and stability behavior of single-phase natural circulation loops. Nucl. Eng. Des. 215, 139–152 (2002)

    Article  Google Scholar 

  5. Gartia, M.R., Vijayan, P.K., Pilkhwal, D.S.: A generalized flow correlation for two-phase natural circulation loops. Nucl. Eng. Des. 236, 1800–1809 (2006)

    Article  Google Scholar 

Download references

Acknowledgments

This work was supported partly by the KBSI Grant C34904 and National Research Council of Science & Technology.

Author information

Authors and Affiliations

  1. Division of Materials Science, Korea Basic Science Institute, Daejeon, 305-806, South Korea

    Yeon Suk Choi

Authors
  1. Yeon Suk Choi
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Yeon Suk Choi.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Choi, Y.S. Natural Circulation Flow of Cryogenic Liquid for Superconducting Magnet Applications. J Supercond Nov Magn 28, 731–734 (2015). https://doi.org/10.1007/s10948-014-2743-5

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10948-014-2743-5

Keywords

Search

Navigation