Ultra-DENCO® (CRAH)

Ultra-DENCO® was specially designed for the performance and efficiency requirements of data centres, as well as server rooms, UPS and technical rooms. Due to the structure in 2 separate delivery units (heat exchanger and fan chamber), which can be stacked on top of each other on the construction site, a total height of almost 2.6 m can be achieved while at the same time being easy to bring into buildings with standard door heights. The enormous space available in the 1960 mm high upper delivery unit is used to the maximum by the diagonally arranged hydrophilically coated heat exchanger. This maximises performance per footprint (kW/m²) and minimises energy consumption for airflow caused by pressure losses. Heat exchanger variants are available for small temperature differences (e.g. 7/12 °C or 10/16°C) or large temperature differences (e.g. 20/30 °C). Even at higher system temperatures high cooling capacities are achieved.

1 to 4 EC fans with or without APFC (electronic harmonic filter) of the latest generation from are recognised quality supplier are used. The arrangement directly behind the discharge grille results in particularly energy-efficient operation since pressure losses on the discharge side are reduced by eliminating additional diversions.

The device is particularly suitable for rooms with floors voids. In this application, the fan section remains below the false floor and serves as a base stand for the heat exchanger section. Various raised floor heights can be implemented. An application without a floor void is also possible without any problems, as the fan section is equipped with an all-round protection against intrusion. Alternatively, the air can be blown out only to the front or only to the rear. The water connections can be made from below, from the front or from the side.

Ultra-DENCO® represents a particularly flexible and future-proof system, since a connection to a wide variety of cooling systems is possible via the chilled water circuit. As a system solution, FläktGroup offers suitable chillers for indoor (FGWC/GLWC) or outdoor installation (FGAC), as well as chillers with an integrated free cooling function (FGFC/GLFC). Furthermore, heat recovery can be realised with the help of 4-pipe heat pumps HeaMo (FGAS), so that the waste heat from the cooling process can be used as heating energy for heating the building free of charge.

A major advantage is that no refrigerant is used in the installation room since the energy is transported solely via the chilled water circuit. Thus, the choice of refrigerant and the refrigerant charge depends solely on the independent refrigeration system, which is usually installed outside. In addition, chillers and Ultra-DENCO® precision air conditioning cabinets can be replaced independently of one another as part of retrofit measures.