28-09-2010, 10:32 AM
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This article is presented by:
NUSRATH AHAMED.
3VC06ME025
Dept of Mechanical Engg
R.Y.M.E.C
BELLARI
This article is presented by:
NUSRATH AHAMED.
3VC06ME025
Dept of Mechanical Engg
R.Y.M.E.C
BELLARI
MAGNETIC REFRIGERATION
OBJECTIVE
To develop more efficient and cost-effective small-scale H2 liquefiers as an alternative to vapour-compression cycles using magnetic refrigeration (adiabatic magnetization).
INTRODUCTION
Magnetic refrigeration is a physical process that exploits the magnetic properties of certain solid materials to produce refrigeration.
Magnetic refrigeration is a cooling technology based on the magneto caloric effect. This technique can be used to attain extremely low temperatures (well below 1 Kelvin), as well as the ranges used in common refrigerators, depending on the design of the system.
HISTORY
Magneto caloric effect was discovered in pure iron in 1881 by
E. Warburg.
Debye (1926) & Giauque (1927) proposed a improved technique of cooling via adiabatic demagnetization independently.
The cooling technology was first demonstrated experimentally in 1933 by chemist Nobel Laureate William F. Giauque & his colleague Dr. D. P. MacDougall for cryogenic purposes.
In 1997, Prof. Karl A. Gschneidner, Jr. by the Iowa State University at Ames Laboratory, demonstrated the first near room temperature proof of concept magnetic refrigerator.
To develop more efficient and cost-effective small-scale H2 liquefiers as an alternative to vapour-compression cycles using magnetic refrigeration (adiabatic magnetization).
INTRODUCTION
Magnetic refrigeration is a physical process that exploits the magnetic properties of certain solid materials to produce refrigeration.
Magnetic refrigeration is a cooling technology based on the magneto caloric effect. This technique can be used to attain extremely low temperatures (well below 1 Kelvin), as well as the ranges used in common refrigerators, depending on the design of the system.
HISTORY
Magneto caloric effect was discovered in pure iron in 1881 by
E. Warburg.
Debye (1926) & Giauque (1927) proposed a improved technique of cooling via adiabatic demagnetization independently.
The cooling technology was first demonstrated experimentally in 1933 by chemist Nobel Laureate William F. Giauque & his colleague Dr. D. P. MacDougall for cryogenic purposes.
In 1997, Prof. Karl A. Gschneidner, Jr. by the Iowa State University at Ames Laboratory, demonstrated the first near room temperature proof of concept magnetic refrigerator.
