Cold production and heat recovery

Overview

ABSTRACT

This article deals with the configurations and physical principles specific to obtaining ultralow temperatures, below ?100°C, in cryogenics. The use of liquefied gases such as air and helium covers the most common processes, but the thermomagnetic properties of some materials can also be usefully exploited. Perspectives for the general production of cold, not only in cryogenics, are also set out.

Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.

Read the article

AUTHOR

Michel FEIDT: Professor Emeritus - University of Lorraine, France

INTRODUCTION

This study focuses in particular on the production and use of very low temperatures, typically below 100°C; the range considered is classically known as the cryogenics.

To obtain them, it is necessary either to use techniques different from those imposed in the two previous articles Cold production and heat recovery: general principles [BE 8 095] and Refrigeration and heat recovery: special machines [BE 8 096] or call on new physical principles. Both approaches are examined in this article.

It's worth noting that high-temperature heat reclamation, the counterpart of cryogenics, remains a little-explored field that would undoubtedly merit more consideration; this subject is only touched on here, to preserve formal symmetry, and will be the subject of another article to come.

...