| Autor: |
Kamiya, Koji, Numazawa, Takenori, Koen, Takaaki, Okano, Takahiro, Matsumoto, Koichi, Nimori, Sigeki |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Applied Superconductivity; Jun2004, Vol. 14 Issue 2, p1734-1737, 4p |
| Abstrakt: |
It is well know that some of rare earth compounds that show giant magnetcaloric effect are utilized for adiabatic magnetic refrigeration (ADR) at cryogenic temperatures. Recent development of materials science, however, suggested practical possibility of magnetic refrigeration at higher temperatures using Active Magnetic Regenerative Refrigeration (AMRR). A project WE-NET plans to make use of AMRR to liquefy hydrogen from room temperature in hydrogen plants for upcoming hydrogen energy society. Higher efficient liquefaction requires magnetic materials with higher magnetiocaloric effect, higher thermal conductivity and lower thermal expansion. This paper surveys thermal properties of some of promising rare earth compounds and its magnetic dependence for deep insight in its nature as well as for contribution to a database for designing and development of the practical AMRR for hydrogen liquefaction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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