A French cold store has invested in an innovative HFC-134a/CO2 cascade refrigeration unit with a flooded evaporator/condenser.
Having to replace its HCFC-22 units, the HFC-134a/CO2 solution with hot gas defrost was selected as the best cost/efficiency compromise among a range of possible alternative solution, including a drop in solution R-422D, a cascade NH3/CO2 and a R-507 retrofit.
Thanks to energy performance optimization and to the new design, the cold store energy consumption has been reduced by around 25 % compared to the previous HCFC-22 unit.
The cold store has 36,000 m3 of storage capacity at -21°C, 4,000m3 of dry storage, and 1000 m2 of dock space at controlled temperature (+2°C/+6°C).
Source (in French): RPF.fr