TITLE

A Study on Environment Friendly and Energy Efficient Room Temperature Magnetic Refrigeration

AUTHOR(S)
Mehrotra, Anubhav; Menon, Rajat; Mahajan, Sanchit; Kumar, K. Senthil; Rajagopal, K.
PUB. DATE
March 2009
SOURCE
Proceedings of World Academy of Science: Engineering & Technolog;Mar2009, Vol. 51, p770
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The two key issues that are menacing the refrigeration and air-conditioning sector throughout the world are Ozone Depletion and Global Warming. Successful implementation of the Montreal protocol is being carried out by phasing out refrigerants with high Ozone Depleting Potential (ODP) like CFC and HCFC and selecting HFC's as alternate refrigerants in vapour compression refrigeration. However HFC refrigerants possess high Global Warming Potential (GWP) and its use has been restricted by Kyoto protocol. Moreover, the energy consumption of refrigeration systems is also high influencing on global warming. Thus, in addition to finding alternative refrigerants, researchers are exploring new refrigeration 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 and a model is proposed. This model employs a unique arrangement of magnetocaloric materials which acts as a refrigerant. Magnetic refrigeration has advantages such as environment-safe and high efficiency based on the phenomena of magnetocaloric effect (MCE). Although mature in low temperature field, it is still in the state of exploration in general. Recent research activities have therefore been focused on materials with more than average MCE values. Since the MCE scales with the moment size, many investigations have therefore concentrated on Mn compounds. Also the energy efficiency of magnetic refrigeration system compared with Vapour Compression Refrigeration can be up to 10 times higher as COP of the magnetic refrigeration system could be achieved up to 20.
ACCESSION #
40086250

 

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