Copenhagen Metro

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Copenhagen Metro

Place of installation:


Year of installation:


Plant power rating:

500 kW

Plant type:

IT Cooling


HiRef, in collaboration with distributor Unicool, supplied 4 air-cooled water chillers from the CDA series for the server room of the Copenhagen Metro. Consisting of independent refrigeration circuits with modulating compressors, the units reach a total cooling capacity of 500 kW and use a transcritical system with natural refrigerant R744. HiRef met the final customer’s needs by offering a customised solution. In fact, the four units, which replaced outdated machines, were installed in sites with significant installation constraints. The plant’s energy efficiency is another important aspect: the innovative gas cooler pressure optimisation system, a HiRef patent, maximises performance at every operating condition. The R&D department of HiRef and subsidiary Tecno Refrigeration, the Group’s competence centre on CO2, worked collaboratively on the project. A FAT was conducted with the customer present at HiRef’s plant in Tribano (Padova - Italy) and technical training was provided to the personnel in charge of installation. The future is transcritical.


Installed units:


  • 1x CDA 91 FL
  • 3X CDA 191 FL




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