A Danish hotel, which is part of Project Zero and a demonstration venue for the unique clean-tech expertise of the Sønderborg area. Ambitious sustainability goals have been set out since it was initially conceived and designed. The new refrigeration system uses compressors designed for low-GWP refrigerants R-449A and R-513A, ensure stable temperatures for 10 walk-in cold stores across the 19 floors of the hotel.
The refrigeration system project focused on sustainability. The hotel cellar houses the refrigeration system which provides cooling for the cold stores and freezers across the hotel and the system ensures high refrigeration capacity, high performance level and lower energy costs. Heat is transferred from the refrigeration condensers to a free cooler. In the future this may be exploited for heat pump use for domestic hot water or space heating. A hotel policy is to use surplus heat generated by the cooling systems to heat hot utility water, and surplus heat can be stored and used as needed.
R-449A and R-513A are non-flammable lower GWP HFC/HFO blend refrigerants used as replacements for R-404A and R-134a for commercial refrigeration. R-449A reduces GWP by 64% compared to R-404A and R-513A reduces GWP by 56% compared to R-134a.