Integrated neon refrigerating machine and refrigerating method

Abstract

The invention discloses an integrated neon refrigerating machine and a refrigerating method. The integrated neon refrigerating machine comprises a centrifugal compressor, a permanent magnet synchronous high-speed motor, a centripetal expansion turbine, a water cooler, a recooler and a heat exchanger. The centrifugal compressor, the permanent magnet synchronous high-speed motor and the centripetalexpansion turbine are manufactured on the same axis in an integrated mode. The water cooler is used for achieving exchange cooling with neon at an outlet of the centrifugal compressor, and the cooledneon enters the centripetal expansion turbine after passing the recooler. After the centripetal expansion turbine acts, low-temperature neon can be obtained, the obtained low-temperature neon conductsheat exchange with coolants of cold users through a plate-fin heat exchanger, and then the low-temperature neon returns to the inlet end of the centrifugal compressor after passing the recooler to form closed-loop circulating. According to the integrated neon refrigerating machine and the refrigerating method, the circulating neon is used for achieving compressed expansion refrigeration, the neonin different low-temperature sequences can be obtained and different needs of the cold users can be met. The integrated neon refrigerating machine is high in efficiency, good in stability, easy to operate and capable of providing preparation cold sources for nitrogen supercooling, plasma nitridation, natural gas liquefaction and the like.

Description

technical field [0001] The present invention relates to the field of refrigeration, and mainly relates to an integrated neon gas refrigerator, which is a refrigeration system specially using neon gas as a refrigeration medium. More specifically, it relates to a centrifugal compressor, a permanent magnet synchronous high-speed motor and a A neon gas refrigerator integrated with a radial turboexpander. Background technique [0002] In the past decades of development, the development of high temperature superconducting (HTS) materials has made high temperature superconducting more and more widely used in the field of power, such as power transmission cables, fault current limiters, transformers, ship propulsion motors, Much progress has been made in both generators and inductive energy storage. The cryogenic cooling system is an important part of superconducting power equipment, and has a great impact on the success or failure of HTS power applications and the development of i...

AI Technical Summary

Problems solved by technology

Neon is an inert gas, and its safety is much higher than that of liquid hydrogen. The latent heat of vaporization per unit volume of neon is 40 times higher than that of liquid helium. The operating temperature of the HTS coil cooled by liquid neon is also very stable. In addition, the reverse Brayton cycle The refrigerator uses neon gas as the working medium, and the cooling efficiency is higher than that of the helium refrigerator, but the price of neon gas is much higher than that of helium gas. If liquid neon is used to directly cool the HTS device, there are great limitations.

[0004] Therefore, supercooled nitrogen or slurry nitrogen is still used in the cooling of HTS devices at present, but the preparation process of supercooled nitrogen and slurry nitrogen is relatively complicated and the efficiency is not high.

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