Abstract
We have constructed a special one-shot test apparatus to investigate the properties of a reciprocating magnetic refrigerator for helium liquefaction. The liquefaction efficiency for one-shot demagnetization was only about 40% with an initial temperature of 5 K, and higher initial temperatures gave lower liquefaction efficiencies. Losses in the experiment can be classified into four causes: the thermal resistance of the film condensation heat transfer, friction, the heat flow from the holders to the refrigerant and cooling of gaseous helium above 4.2 K to 4.2 K. The last cause was the most dominant.
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© 1986 Plenum Press, New York
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Fujita, T., Yazawa, T., Hashimoto, T., Nakagome, H., Kuriyama, T. (1986). An Experimental Study Simulating the Helium Liquefaction Process in a Reciprocating Magnetic Refrigerator. In: Fast, R.W. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 31. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2213-9_86
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DOI: https://doi.org/10.1007/978-1-4613-2213-9_86
Publisher Name: Springer, Boston, MA
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