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 Shock-freeze systems  
Planning / Implementation / Main componentscompressor from Bock Kältemaschinen GmbH in refrigeration systems for the food sector
Refrigerantcarbon dioxide (CO2)
System start-upfirst plant in 1993
The trend towards natural refrigerants has arrived in the industrial sector - and particularly in the food sector. Years ago, innovative system developers called on Bock to develop a series of compressors for use with carbon dioxide, in addition to its standard compressors and compressor series for ammonia.
DemandsReduce energy consumption while increasing the freezing speed of shock-freeze plants in the food sector, thereby improving product quality. Ensure temperatures of -40°C to -50°C in the shock-freeze room.
SolutionRefrigeration system in cascade arrangement with carbon dioxide used as the refrigerant in the low-pressure stage.

Technical specifications:
Type of facilitycascade circuit, direct evaporation,
dry expansion
RefrigerantCO2 in the low-pressure stage
Refrigerating capacityvarious capacity sizes, up to approx. 500 kW at an evaporation temperature of -50 °C (parallel cascade arrangement)
Special features / CommentsTo date, more than 30 plants using this technology have been installed and taken up into operation in Germany.


Bock Kältemaschinen GmbH
Dr. H. Kaiser
Benzstraße 7
72636 Frickenhausen