Arneg and PC Delta Launch Pilot Cold Ring System on R290 at a Chizhik Store in Volgograd

A pilot Cold Ring refrigeration system using natural refrigerant R290 has been launched at a new Chizhik chain store in Volgograd. The project was implemented by Arneg together with its manufacturing partner PC Delta.

Architecture with no refrigerant in the sales floor

SURGUT vertical open refrigeration cases are cooled by chilled propylene glycol circulating through the sales floor. The R290 circuit is entirely contained within the chiller, so there are no long refrigerant piping runs in the sales area. Compared with a conventional DX system on R404A, this architecture reduces the amount of refrigerant and simplifies the refrigeration system configuration.

Modularity and load management

Cold Ring features a modular design: cooling capacity is increased by adding units, and servicing an individual module does not require shutting down the others. Arneg has developed a range of chillers with cooling capacities from 7 to 44 kW. Centralised heat production allows compressors, the pump, and fans to be managed according to the store's actual cooling load.

Context of the shift to natural refrigerants

The launch in Volgograd marked a step for Arneg in the practical deployment of natural refrigerants in Russian retail. The project fits within the industry's broader transition toward reducing HFC refrigerant use in line with the Kigali Amendment to the Montreal Protocol. The company continues to develop solutions aimed at improving energy efficiency, operational safety, and reducing the environmental impact of refrigeration equipment.

Source: Refrigeration Industry.