The energy network in Sion, Switzerland, is said to be the world’s first energy network using CO2 as a heat transfer fluid instead of water.
The system serves 26 medium-temperature cold rooms, 11 refrigerated cabinets and 5 low-temperature cold rooms supporting the hotel’s seven bars and restaurants.
Grünenfelder uses Biaggini Frigoriferi system in place of R507A refrigeration system and reversible R404A heat pump.
ATMO Europe: Reversible CO2 Heat Pumps, Combined with CO2 Booster System, Take Root in European Retail Outlets
Multiple examples are unveiled by HVAC&R engineering specialists Frigo-Consulting.
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Around 60% of existing stores have already been retrofitted to natural refrigerants too for more than 700 stores’ having a total CO2 installation.
The new CO2 system, which is the first for cold storage operator Grünenfelder, replaces an old troublesome R507A system.
In 2021, the Swiss manufacturer installed 10 new transcritical CO2 racks and its first two reversible CO2 chillers supplying both AC and heating for a Swiss mall.
Cooling of the Large Hadron Collider’s tracking detectors will be based on a two-stage R744 booster system, with a secondary pumped CO2 loop.
Biaggini’s system is one of the first of its kind to use CO2 as the refrigerant in dual-duty air conditioning/heating system, the company said.