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Energy efficiency and flexible performance by independent speed adjustment of the cryocooler and the compressor.

Number: 0052

Author(s) : PAJDZIK L., RICH T., BICEAN I., KLYSZEJKO A., SHAXTED J., RENSHAW A.

Summary

Energy efficiency and reduced power consumption are crucial for modern cryogenic systems. Gifford-McMahon (GM) cryocoolers offer an economical cryogen-free solution for a wide temperature range, combined with their relatively high efficiency. Simple mechanical design enhances reliability for long-term use and facilitates easy maintenance. Compact size and relatively low vibration levels make them ideal for precision applications, from analytical instrumentation to large radioastronomy arrays.
To optimize the performance of GM cryocoolers for specific heat exchange requirements, we can fine-tune their performance for each application. Firstly, adjusting the cryocooler’s speed allows for flexible cryogenic cooling delivery. Maintaining precise temperatures over extended periods is critical for achieving optimal performance. When matching the heat lift to application requirements through heating adjustments, overall efficiency can suffer. Our approach enhances GM cryocooler control by dynamically adjusting the speed, enabling tailored performance to deliver specific heat exchange capacity.
Furthermore, the helium compressor's speed can be modified to boost the overall energy efficiency of the system. We control cryogenic performance by adjusting the speeds of both the GM cryocooler and the helium compressor. Rather than producing excess cooling that necessitates controlled heat dissipation, our method generates only the cooling required. This innovative strategy prioritizes energy efficiency, particularly for long-term applications, significantly minimizing environmental impact through mindful energy consumption practices.
We present a proof-of-concept performance analysis of an adjustable GM cryocooler system. Heat capacity requirements can be tuned to the applications’ requirements, resulting in optimised performance and reduce impact of already costly cryogenic operations.
Keywords: Cryocoolers, Coldheads, Gifford-McMahon Cycle, Compressors, Two-Stage Cryocoolers, Adjustable Speed Compressors, Power Consumption, Energy Efficiency.

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Pages: 7 p.

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Details

  • Original title: Energy efficiency and flexible performance by independent speed adjustment of the cryocooler and the compressor.
  • Record ID : 30033894
  • Languages: English
  • Subject: Technology
  • Source: Cryogenics 2025. Proceedings of the 18th IIR International Conference on Cryogenics, Prague, Czech Republic, 7-11 April 2025.
  • Publication date: 2025/04/07
  • DOI: http://dx.doi.org/10.18462/iir.cryo.2025.0052

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