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4. Refrigeration balances
To select or calculate a refrigeration machine, it is necessary to establish a refrigeration balance.
Depending on the type of application, there are two types of balance:
an energy balance in kJ per day ;
a dynamic kW balance.
4.1 Energy balance
This balance must be established each time an enclosure of a given volume and function needs to be maintained at a constant temperature.
The following is a simplification of a much more complex calculation, which should take into account phenomena subject to great variability, such as :
ambient temperature and humidity ;...
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Refrigeration balances
Refrigeration circuit for industrial freezers
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- Systèmes frigorifiques mécaniques utilisés pour le refroidissement et le chauffage. Prescriptions de sécurité - ISO 5149 -
- Compresseurs pour fluides frigorigènes. Présentation des performances - ISO 9309 -
- Sécurité et exigences environnementales des systèmes de réfrigération - TC 86/SC 1 -
- Termes et définitions - TC 86/SC 2 -
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Pressure equipment regulations
In the past, it was defined by a decree of 1943, subsequently revised in 1960. As part of the harmonization of technical regulations, the European Union has issued a Pressure Equipment Directive (PED) (no. 97/23), which becomes the only rule in force in each member state; for France, the transcription is the subject of a decree and order no. 99-1046 of 13/12/1999.
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