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1. WO2003021164 - SYSTEME DE COMPRESSION DESTINE AU CHAUFFAGE ET A LA REFRIGERATION

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

Claims

1. A compression refrigeration system including a compressor (1), a heat rejector
(2), an expansion means (3) and a heat absorber (4) connected in a closed
circulation circuit that may operate with supercritical high-side pressure
characterized in that the refrigerant charge and component design of the system corresponds to a stand still pressure inside the system which is lower than 1.26 times the critical pressure of the refrigerant when the temperature of the whole system is equalised to 60°C; and
that carbon dioxide or a refrigerant mixture containing carbon dioxide is applied as the refrigerant in the system.

2. System according to claim 1, characterized in that a multi-stage or
variable capacity compressor is used.

3. System according to any of the preceding claims 1-2, characterised in that the compressor is of a semi-hermetic or hermetic design.

4. System according to any of the preceding claims 1-3, characterized in that the system also comprises an internal heat exchanger.

5. System according to any of the preceding claims 1-4, characterized in that it is designed for transcritical operation.

6. System according to any of the preceding claims 1-5, characterized in that a receiver or extra component provide extra volume in the system.

7. System according to any of the preceding claims 1-6, using CO2 as refrigerant
characterized in that the charge of the system is between 18 and 250 grams per litre of the total internal volume of the system.

8. System according to any of the preceding claims 1-7, characterized in that cycle modifications, such as, but not limited to, throttling to intermediate pressure is done in order to improve efficiency and or operating conditions.

9. System according to any of the preceding claims 1-8, characterized in that the system operation may be reversed.