8. Heat balance

Knowing the cooling capacity required for different types of furniture and applications means you can make a well-considered selection of the refrigeration systems you need.

This cooling capacity is generally expressed per unit of furniture for single units, or per "linear meter" for furniture that can be connected in a linear fashion.

This determination is usually made experimentally by the manufacturer. Numerous laboratory tests, under well-defined conditions, are necessary. French, European and international standards specify the conditions and methodology to be followed. The major manufacturers are generally well-equipped with high-performance laboratory facilities, and have the highly-qualified personnel needed to monitor complex tests. Production runs of standardized furniture pay for themselves in terms of equipment investment and...

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Heat balance

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Icing and defrosting

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...