A Magnetic Refrigerator for Superfluid Helium Equipped with a Rotating Supereonducting Magnet System

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概要

• 論文の詳細を見る

• A rotating magnetic refrigerator based on a new concept has been designed, and a prototype has been tested. The model refrigerator uses gadolinium gallium garnet (GGG) as the working substance and realizes a Carnot cycle between about 2 K and 4.2 K. Heat switches are employed which utilize differences in the heat transfer modes of helium and are free of moving parts. By rotating a system of superconducting coils in the persistent current mode, the working substance at rest is sinusoidally magnetized and demagnetized and this effects the refrigeration cycle. At the maximum magnetic field applied to the GGG of 2.94 T and the operating frequency of 0.20 Hz (rotational speed 4 rpm), the minimum temperature obtained was 1.90 K and the useful cooling power was 1.5 W at 2.10 K.

• 社団法人応用物理学会の論文
• 1986-01-20

著者

• Ogata Hisanao

  Mechanical Engineering Research Laboratory Hitachi Lid.

• Hakuraku Yoshinori

  Mechanical Engineering Research Laboratory Hitachi Lid.

関連論文

• Natural Convection Heat Transfer to Liquid Helium in a High Centrifugal Acceleration Field
• A Magnetic Refrigerator for Superfluid Helium Equipped with a Rotating Supereonducting Magnet System
• Thermal Conductivity of the Gadolinium Gallium Garnet, Gd_3Ga_5O_, between 1.4 K and 20 K
• A Static Magnetic Refrigerator for Superfluid Helium with New Heat Switches and a Superconducting Pulse Coil
• Conceptual Design of a New Magnetic Refrigerator Operating between 4 K and 20 K

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