Glossary – Definitions
Refrigeration and Heat boosting general principles

Reverse or receiver cycles ; reverse cycles

Cold machine cycles, heat pumps, thermotransformers.

Trithermes or quadrithermes machines ; 3Tor 4T reverse cycle machines

Reverse cycle machines generally based on sorption (absorption; adsorption; chemisorption) and featuring almost exclusively thermal operation.

Irreversibilities ; irreversibilities

They result in various mechanisms for degrading noble energy (mechanical, electrical, magnetic, chemical) into degraded energy (heat).

Optimization ; optimization

Optimization requires the construction of a model, with the identification of an objective function whose maximum or minimum is sought. For the engineer, the optimum is usually economic (thermo-economic) and subject to constraints, such as environmental ones.