Volume No. 3 Issue No.: 2 Page No.: 449-455 Oct-Dec 2008

 

AN INNOVATIVE, ENERGY EFFICIENT AND ENVIRONMENT FRIENDLY ROOM TEMPERATURE MAGNETIC REFRIGERATION SYSTEM - AN OVERVIEW

 

K. Senthil Kumar*, Abhishek Choudhury and Priyam Das

VIT University, Vellore, Tamil Nadu, 632014 (INDIA)

 

Received on : June 18, 2008

 

ABSTRACT

 

The two key issues that are menacing the refrigeration and air-conditioning sector through out the world is Ozone Depletion and Global Warming. The CFC and HCFC refrigerants used by the conventional vapour compression refrigeration deplete ozone layer and HFC refrigerants influences green house effect and enhances global warming. Moreover, the energy consumption of air conditioning systems is also high influencing on global warming. Thus, in addition to finding alternative refrigerants, researchers are exploring new refrigerating technologies. At present there is no single refrigerant available with zero ODP and GWP and it is reported that none could be developed or synthesized. In this scenario, the possibility of using an eco-friendly magnetic refrigeration system in room temperature is studied in this work. Room temperature magnetic refrigeration (RTMR) is a new refrigeration method with great application potential. It has advantages such as environmentally safe and high efficiency based on the phenomena of magnetocaloric effect (MCE). An important measure of the MCE is the magnetic entropy and is related to the bulk magnetization, and magnetic field and temperature. MCE could be suitably magnified by varying Magnetic field strength (B), Change in magnetic entropy (?Sm), Bulk magnetization, Change in magnetic field (?B), Curie temperature of magnetic material, Magnetic phase transition properties, Crystallographic transformation, Hysteretic behavior, etc.. In this work the influence of these properties on MCE is studied and it is found that a suitable material could be developed by appropriately selecting the above said properties that yield the giant mag

 

Keywords : Ozone Depletion, Global warming, Magnetic refrigeration and GMCE

 

 

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