Reference Supermarket Refrigeration
Migros
Industry Segment
Customer
Migros
Zürich Switzerland
Background
In collaboration with partner companies, the cooperative Migros Zurich has modernised its food supermarket that was first established over 30 years ago in the Glattzentrum shopping centre. In view of life cycle costs, the outcome was a European showpiece supermarket.
All existing refrigerating plant and equipment were replaced during the renovation phase. This included the counters in the sales areas, the refrigeration cases, refrigeration rooms and deep-freeze rooms.
The existing refrigerating plant was replaced by three completely new multicompressor refrigerating systems; two above-zero refrigerating systems (AZ.1 and AZ.2) and a deep-freeze system (DF). When choosing the compressors, GMZ and SSP opted for those offered by Bock, due to their previous first-rate experience of Bock compressors
Short description of the solution
AZ.1 refrigerating system
Bock compressors:
2 x HGX8/2470-4 mech. output regulation
2 x HGX8/2830/4
1 x frequency converter
1 x mech. output regulation
Total displacement: 920.4 m³/h
Evaporation temperature: -10°C
Condensation temperature: + 34°C
Refrigerant: R134a
Refrigerating capacity: 300 kW
220m of refrigeration cases
5 refrigeration rooms
Waste heat from the CO2 DF system
Refrigerant system: Antifrogen
N Recooling system: Water
Utilisation of waste heat: Ceiling radiant panels and utilisation of false floor through desuperheaters
Heat pumps from the recooling system
AZ.2 refrigerating system
Bock compressors:
3 x HGX5/830-4
1 x frequency converter
2 x mech. output regulation
Total displacement: 216.6 m³/h
Evaporation temperature: -10°C
Condensation temperature: + 34°C
Refrigerant: R134a
Refrigerating capacity: 70 kW
55m of refrigeration cases
1 refrigeration room
Recooling system: Water
Utilisation of waste heat: Warm water
Deep freeze DF
Bock compressors:
3 x HGX22P/125-4 Co2
1 x frequency converter
1 x HGX12P/60-4 Co2
Total displacement: 38.7 m³/h
Evaporation temperature: -35°C
Condensation temperature: -1°C
Refrigerant: R744
Refrigerating capacity: 54 kW
Recooling system: AZ.1 refrigerant system
Utilisation of waste heat through desuperheaters: Warm water
Key figures
Capacity in kW (at temperature level): AZ.1: 300 kW | AZ.2: 70 kW | Deep freeze DF: 54 kW
Refrigerant: R-134a
Secondary refrigerant: R-744 (CO2)
Contractor
Company: Charles Hasler AG, Regensdorf (CH) / Baumgartner AG, Uster (CH)
Year of installation: 2008
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