High energy savings thanks to maximum utilisation of free cooling and a total heat recovery rate of > 95 %.
Air ducts are not visible in the room: air diffusers are integrated unobtrusively into the concrete ceiling or corridor Partition.
Cooling tubes, made of aluminium with high thermal conductivity and with diameters of 60 or 80 mm, are cast into concrete ceilings in a grid. The internal surface is ribbed to improve heat transfer. The supply air is not fed directly to the rooms: it firstly flows through the cooling tubes within the concrete ceilings. This warms the cold supply air to approximately ceiling temperature, the required heat being taken from the ceiling. This withdrawal of heat provides the cooling for the ceiling. This supply air is then fed to the room through Kiefer air diffusers, meeting the hygiene requirement for fresh air. An outlet temperature of approximately 21°C is achieved for the supply air without using a supplementary heater. No primary energy is required, the process is self-regulating and virtually free of variation. The temperature is extremely stable owing to the high storage capacity of the concrete ceilings. Heat recovery by the ventilation system is increased to over 95 % by the addition of the CONCRETCOOL system. As a result, the requirements set out in the German Renewable Energies Act are exceeded. Combined with the potential of free cooling, this results in unparalleled operating costs and high energy savings.
We will create a CONCRETCOOL system proposal for you, free of charge. We would be happy to produce a control concept for the best use of our system together with the ventilation system. As air-conditioning experts, we moreover offer you a full range of services in ambient air technology, from planning through to commissioning.