BY : RAMAKANTH P JOSHI 1JS06ME034. SEMINAR ON MAGNETIC REFRIGRATION Attractive ALTERNATIVE COOLING TECHNOLOGY. outline. Magnetocaloric effect Principle Prototype : Ames lab & astronaut corp America Advantages of magnetic refrigeration Technology comparison Future scope.
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RAMAKANTH P JOSHI
SEMINAR ONMAGNETIC REFRIGRATIONAttractive ALTERNATIVE COOLING TECHNOLOGY
Prototype : Ames lab & astronaut corp America
Advantages of magnetic refrigeration
Ferromagnetic materials – alloy of Al, Ni,Fe,Co
Paramagnetic materials – Cr,Mn, Pt, Pd, K, Cu.
Diamagnetic materials – Zn, Bismuth, antimony.
( Cooling with the help of external magnetic field)
In a small physics experiment the magneto calorific effect in a gadolinium sample is demonstrated. Magnetization heats the sample up and demagnetization cools it down
(a) Tubes – Cu or Ag
(b) Perforated plates – stainless steel
(c) Wire screens - Cu
(d) Particle beds – ceramic or metal sphere
AIM : To achieve good thermal conductivity
Analogy between magnetic refrigeration and vapor cycle refrigeration
House hold refrigerators appliances
Central cooling systems
Room air conditioners
Supermarket refrigeration ( display cabinets)
Use of Magnetic refrigerator reduces wastage of energy
BASIC AND APPLIED THERMODYNAMICS by Dr. P K Nag 2/e TMH publication
Research paper: magnetic refrigeration by JEFF JOHNSON