5. Characteristic temperatures

In a retail refrigeration unit, there are different temperature characteristics.

Application temperature

Technically and commercially, furniture is characterized by its application temperature t _i . This temperature corresponds roughly to the average temperature range encountered in the air of the useful loading volume.

By analogy with any cooled enclosure, it is assumed that this corresponds approximately to the average temperature of the foodstuffs displayed and stored. The definition and choice of a refrigeration unit providing a certain application temperature t _i depends on the nature of the product being exposed and preserved by cold, and on the regulations in force.

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Characteristic temperatures

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Air curtains

References

(1) - RIGOT (G.) - Meubles et vitrines frigorifiques pour la distribution alimentaire. - 350 p. Pyc Édition France (1990). (Remerciements à l'Éditeur PYC Livres pour son autorisation d'en publier de larges extraits).
(2) - RIGOT (G.) - Load variations for...

Regulations

Order of May 9, 1995 (JO of May 16, 1995) published by AFNOR in the Maîtrise de la chaîne du froid (Cold chain control) compendium.

Standardization

Various technical standards apply to refrigerated display units:

international standards ISO series 5160..., ISO series 1992...
European standards EN 441 series...
French standards series D74...

These various standards can be obtained from AFNOR

Simulation software

Sales refrigeration units installed in food retail outlets are complex thermal and aeraulic machines, operating under variable ambient conditions. They constantly exchange air, heat and humidity with the store's internal environment. The cold production needed to maintain their temperature is cyclically interrupted by defrosting operations. The temperature of the goods on display will be strongly affected by these...