Exergy Analysis of Magnetic Refrigeration

One of the main challenges of the industry today is to face its impact on global warming considering that the greenhouse effect problem is not be solved completely yet. Magnetic refrigeration represents an environment-safe refrigeration technology. The magnetic refrigeration is analysed using the second law analysis and introducing exergy in order to obtain a model for engineering application.

Introduction:

One of the main challenges of the industry today is to face its impact on global warming; moreover, the greenhouse effect problem is not be solved completely yet. So, in addition to further developing the vapor compression technology, technical physicists and engineers have begun to explore new refrigeration technology such as magnetic refrigeration.

The magnetic cooling technology is based on the use of the magnetocaloric effect (MCE) applied to various metallic materials and new alloys named magnetocaloric materials (MCM). This application uses reversible temperature change in paramagnetic salts to obtain low temperatures by adiabatic demagnetization.

Magnetic refrigeration is an environment-safe refrigeration technology; indeed, magnetic cooling offers an innovative technical solution that will enable to reduce this global warming impact through two ways: first, it will eliminate refrigerant fluids as CFC, HCFCs and other ammonia, thus it will decrease the direct gas emissions; last, it can use the intrinsic better performance of a magnetocaloric material. The magnetic refrigeration does not have ozone-depleting and greenhouse effects for employing magnetic materials as refrigeration media.
Source: ARXIV
Author: Umberto Lucia

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