HFO-1234ZE(E)/CO2 CASCADE SELECTED FOR THE RETROFIT OF A CZECH HYPERMARKET

HFO-1234ze(E) and CO₂ in a cascade configuration have been selected for the retrofit of a R-404A based system in a major Czech hypermarket.

The customer requirements were a low GWP refrigerant, mildly a flammable (Class A2L) refrigerant for indirect cooling, and a high energy efficiency.

These requirements were met by the use of indirect cooling with HFO-1234ze(E) (GWP =1) for air conditioning (440 kW) and for the medium temperature level (533 kW), and by CO₂ direct expansion at the low temperature level (135 kW).
Combined with the choice of efficient refrigerants, the integration of air-conditioning, cooling and heat recovery in one system has delivered a reduction in energy consumption by around 20-30 %.

Source : Product Manufacturer