Neon helium mixtures as a refrigerant for the FCC beam screen cooling: comparison of cycle design options

Kloeppel, S; Quack, H.; Haberstroh, Ch.; Holdener, F.

doi:10.1088/1757-899x/101/1/012042

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…In previous studies of working systems at a temperature level of 20...50K a neon, helium and hydrogen mixtures were used for cryostatting Kloeppel et al, 2017;Kloeppel et al, 2015;Zhoutuo et al, 2018). In these papers, the work of cryogenic systems on a mixture of neon with helium and hydrogen-based on balance equations was investigated.…”

Section: Innovative Part Of the Workmentioning

confidence: 99%

2H-Ne-He as the Working Fluid Components In Cryogenic Systems

Dalakov¹,

Aleksandra²,

Rozhentsev

et al. 2020

Smart Energ Sustain Env

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Recently with the increasing demand for isotopic materials, the development of customized refrigeration units which allows temperature stabilization, or cryostatting in the temperature range of 30…50 K became necessary. The required temperature stabilization depends on the isotope and process type and need to be performed at different temperatures. Thus, it is obvious that the development of a reliable and efficient refrigeration unit operating in the temperature range of 30…50 K is a relevant objective. This paper presents the result of a preliminary study of the cryogenic system designed for the cold production in the temperature range of 20...50 K. Structurally, the system is designed as a cascade of two refrigeration machines using a mixed refrigerant media as coolant. The Linde-Hampson refrigeration unit, which generates cold at a temperature level of about 90...100 K, is the upper high-temperature stage of the refrigeration cascade. The working fluid of the upper stage is a multicomponent zeotropic mixture of hydrocarbons. The working mixture is compressed in a hermetic lubricated compressor with a moderate compression ratio and a maximum discharge pressure of up to 30 bar. The lower "cryogenic" stage of the system implements the Bell-Coleman cycle. A three-component zeotropic mixture 2H-Ne-He is used as the working fluid of the low-temperature stage, which ensures the operability of the "cryogenic" stage of the system in the temperature range of 20...90 K. The current paper presents the design diagrams and thermodynamic cycles of the system and its elements. The rationale for selection of the refrigerant mixture and a preliminary analysis of the system components are reported.

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Section: Innovative Part Of the Workmentioning

confidence: 99%

2H-Ne-He as the Working Fluid Components In Cryogenic Systems

Dalakov¹,

Aleksandra²,

Rozhentsev

et al. 2020

Smart Energ Sustain Env

View full text Add to dashboard Cite

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“…Due to the longer distance the cryogen has to be delivered in the latter kind of sector, it was taken into consideration for the investigations presented in this paper (see Figure 2). The heat absorbed in the BSC cycle will be transferred to a refrigeration cycle using a helium-neon mixture (Nelium) as cryogen, which is under development by Dresden University of Technology [2].…”

Section: Beam Screen Cooling Cyclementioning

confidence: 99%

Investigation and performance assessment of hydraulic schemes for the beam screen cooling for the Future Circular Collider of hadron beams

Kotnig

Tavian

Brenn

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The international study at CERN of a possible future circular collider (FCC) considers an option for a very high energy hadron-hadron collider located in a quasi-circular underground tunnel of about 100 km of length. The technical segmentation of the collider foresees continuously cooled sections of up to 10.4 km; throughout the entire section length, more than 600 kW of heat mainly generated by the beam synchrotron radiation must be removed from the beam screen circuits at a mean temperature of 50 K. The cryogenic system has to be designed to extract the heat load dependably with a high-efficiency refrigeration process. Reliable and efficient cooling of the FCC beam screen in all possible operational modes requires a solid basic design as well as well-matched components in the final arrangement. After illustrating the decision making process leading to the selection of an elementary hydraulic scheme, this paper presents preliminary conceptual designs of the FCC beam screen cooling system and compares the different schemes regarding the technical advantages and disadvantages with respect to the exergetic efficiency.

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Innovative neon refrigeration unit operating down to 30 K

et al. 2020

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A new compact, low-cost, economically competitive and environmentally friendly cryogenic system for cooling a continuous gas flow down to about 30 K is under developing at the ILK Dresden, reported in this paper. The paper shows thermodynamic calculations of cycles on neon and neon-helium mixtures. The assessment of the degree of thermodynamic perfection of the neon cycles in comparison of neon-helium cycles is provided. The use of neon and neon-helium mixture in cryogenic cycles for cryostatting at a temperature level of 27…63 K will increase the thermodynamic efficiency of the cryogenic system and reduce the energy costs of obtaining cold at this temperature level. A technological chain/process, as well as the main economic indicators of the system under development are presented. The availability of such an innovative refrigeration system can be used in a wide range of cryogenic and cooling applications.

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Neon helium mixtures as a refrigerant for the FCC beam screen cooling: comparison of cycle design options

Cited by 7 publications

References 3 publications

2H-Ne-He as the Working Fluid Components In Cryogenic Systems

2H-Ne-He as the Working Fluid Components In Cryogenic Systems

Investigation and performance assessment of hydraulic schemes for the beam screen cooling for the Future Circular Collider of hadron beams

Innovative neon refrigeration unit operating down to 30 K

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