Conveners
Tue-Or2: Cryocooler Research
- Toru Kuriyama (Toshiba)
This paper presents a review of the recent development of a variety of high-performance cryocoolers developed in the author’s laboratory with the operating temperatures ranging from 120 K down to 5 mK. Above 1.0 K, the refrigeration cycles involves both regenerative and recuperative cycles, and the hybrid cycle composed by the former two as well. For the regenerative cycle, the study is...
With advancements in space exploration and condensed matter physics, the demand for ultra-low temperature (mK) technology is on the rise. Sorption coolers, known for their extended service life, absence of moving parts, low vibration, high reliability, and immunity to electromagnetic interference, stand out as a crucial refrigeration technology for the future. In this study, we successfully...
The cooling of large superconducting detector magnets used in high-energy physics relies on a continuous supply of liquid cryogen that is provided by large and complex cryogenic plants. An alternative to this is the development of cooling systems based on the use of cryocoolers. Such a solution can be employed to cool a superconducting magnet itself or to intercept heat from other components...
Numerical modeling plays an important role in developing new or improving existing cryocoolers. It enhances design optimization and performance evaluation through the study of physical parameters that are usually impractical to measure. In the current cryogenics industry, cryocooler modeling is primarily conducted using 1D tools, such as Regen 3.3 and Sage. However, there are only a few works...
The pulse tube refrigerator, lacking moving components at low temperatures, has the advantages of high reliability, long operational lifespan, low cost, and ease of fabrication, and is widely used in refrigeration medical, semiconductor processing, aerospace and other fields. The improvement of pulse tube refrigerator mainly comes from the improvement of phase shifter. In traditional pulse...
This paper presents 100 K cooling performance of a Modified Collins cycle cryocooler designed for in-space cooling applications. Descriptions of this lightweight, high efficiency, and power dense cryocooler design are included. Experimental results are shown of a single-stage floating piston design with active control designed to provide 100 W of cooling at temperatures of 100 K. Maintenance...
A miniature Stirling-type pulse tube cryocooler was designed and manufactured. The performance test was carried out with a linear compressor with a piston diameter of 11 mm. The weight of the whole machine was about 1.2 kg. In this study, we utilized SAGE to investigate the impact of parameters such as frequency, transfer line length, and inertance tube length on the refrigeration performance....
Actively cooled shields are used primarily in the temperature range at or below 20 K (e.g. LH2 or LHe) so that the heat load to these low temperatures is as small as possible. This is due to the high energy required to generate such low temperatures and the relatively low latent heat of the corresponding cryogens. Liquid nitrogen (LN2) with a boiling temperature of 77 K at 1 bar is very often...
