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

[摘要] In the course of the studies for the next generation particle accelerators, in this case the Future Circular Collider for hadron-hadron interaction (FCC-hh), different aspects are being investigated. One of these is the heat load on the beam screen, which results mainly from the synchrotron radiation. In case of the FCC-hh, a heat load of 6MW is expected. The heat has to be absorbed at 40 to 60 K due to vacuum restrictions. In this range, refrigeration is possible with both helium and neon. Our investigations are focused on a mixed refrigerant of these two components, which combines the advantages of both. Especially promising is the possible substitution of the oil ooded screw compressors by more efficient turbo compressors. This paper investigates different ow schemes and mixture compositions with respect to complexity and efficiency. Furthermore, thermodynamic aspects, e.g. whether to use cold or warm secondary cycle compressors are discussed. Additionally, parameters of the main compressor are established.

[发布机构] Technische Universitaet Dresden, Bitzer-Stiftungsprofessur fuer Kaelte-, Kryo- und Kompressorentechnik, Dresden; 01062, Germany^1;Shirokuma GmbH, Wetzikon; 8620, Switzerland^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Hadron-hadron interactions;Helium mixtures;Mixed refrigerants;Mixture compositions;Screw compressors;Thermodynamic aspects;Turbo compressors;Two-component