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- W4387360365 abstract "In this paper, a set of dry vacuum pumps suitable for superfluid helium cryogenic refrigerator are investigated. Process flow diagram and three-dimension diagram of superfluid helium cryogenic refrigerator is designed. As the core parts of the superfluid helium cryogenic system, the control strategies including one Set-point and Upper & Lower limit, variable frequency regulation and failure protection of the circulating dry vacuum pumps are discussed in details. Helium mass flow rate versus suction pressure and pump motor speed with multi-vacuum pump is tested, respectively. When the suction pressure is 400 mbar the discharge pressure is 1100 mbar, the maximal mass flow rate is up to 39 g/s by multi-vacuum pump (MVP) and variable frequency drive (VFD) of motor from 45 to 65 Hz. This set of dry vacuum pumps can satisfy the boundary conditions of superfluid helium cryogenic system to achieve the cooling capacity of 510.6 W @ 1.97 K, which is originally self-developed in China." @default.
- W4387360365 created "2023-10-06" @default.
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- W4387360365 date "2023-01-01" @default.
- W4387360365 modified "2023-10-06" @default.
- W4387360365 title "Investigation on Dry Vacuum Pumps Suitable for Superfluid Helium Cryogenic Refrigeration" @default.
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- W4387360365 doi "https://doi.org/10.1007/978-981-99-6128-3_10" @default.
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