한국초전도ㆍ저온공학회논문지 (Progress in Superconductivity and Cryogenics)

  • 제22권4호
  • /
  • Pages.40-44
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  • 2020
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  • 1229-3008(pISSN)
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  • 2287-6251(eISSN)
한국초전도저온학회 (The Korean Society of Superconductivity and Cryogenics)
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Real operation of 2 kW class reverse-Brayton refrigeration system with using scroll compressor package

  • 투고 : 2020.11.16
  • 심사 : 2020.12.23
  • 발행 : 2020.12.31
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초록

This paper describes the real operation of 2 kW class reverse-Brayton refrigeration system with neon as a working fluid. The refrigeration cycle is designed with operating pressure of 0.5 and 1.0 MPa at low and high pressure side, respectively. Compressor package consists of several helium scroll compressors witch are originally used for driving GM cryocooler. Three segments of plate heat exchanger are adopted to cover the wide temperature range and the refrigeration power is produced by turbo expander. The developed refrigeration system is successfully operated at its target temperature of 77 K. In experiments, all parameters such as pressure, temperature, mass flow rate and valve opening are measured to investigate characteristics during cool-down process and normal state. The difference between design and real operation is discussed with measured experimental data. At normal state of 77 K operation, the developed reverse-Brayton refrigeration system shows 1.83 kW at 68.2 K of cold-end temperature.

키워드

과제정보

This work was supported by the Korea Institute of Machinery & Materials (KIMM) and the Energy Technology Policy Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP).

참고문헌

  1. R. F. Barron, Cryogenic systems, 2nd ed., Oxford University Press: USA, pp. 60-150, 1985
  2. C. Gondrand, F. Durand, F. Delcayre, and S. Crispel, "Overview of air liquid refrigeration systems between 1.8 K and 200 K," Advances in Cryogenic Engineering, vol. 1573, pp. 949-956, 2014.
  3. H. Hirai, et al., "Neon turbo-Brayton cycle refrigerator for HTS power machines," Advances in Cryogenic Engineering, vol. 1434, pp. 1672-1679, 2012.
  4. H. Hirai, et al., "Development of a turbine-compressor for 10 kW class neon turbo-Brayton refrigerator," Advances in Cryogenic Engineering, vol. 1573, pp. 1236-1241, 2014.
  5. H. M. Chang and C. W. Park, "Thermodynamic design of 10 kW Brayton cryocooler for HTS cable," Advances in Cryogenic Engineering, vol. 1434, pp. 1664-1671, 2012.
  6. C. H. Lee, D. M. Kim, H. S. Yang, and S. Kim, "Conceptual design of cryogenic turbo expander for 10 kW class reverse Brayton refrigerator," Progress in Superconductivity and Cryogenics, vol. 17, pp. 41-46, 2015.
  7. J. Lee, C. Lee, H. Yang, and S. Kim, "Design of thermodynamic cycle and cryogenic turbo expander for 2 kW class Brayton refrigerator," KEPCO Journal on Electric Power and Energy, vol. 2, pp. 299-305, 2016. https://doi.org/10.18770/KEPCO.2016.02.02.299