The displacement flow units types QLE and QLF are primarily employed in comfort conditioning. As opposed to the familiar principle of mixed air flow through ceiling or wall diffusers, displacement flow units guarantee low-turbulence air supply. The discharge velocity is very low.
Depending on the degree of activity of the persons in the occupied zone, the supply air can enter the space with a temperature difference of -1K to -6K in relation to the room air. The air spreads out on the floor and is lifted up by convection currents from heat sources (machines, electrical equipment, people, etc.). The fresh air, therefore, finds its own path to the heat source from which the heat load must be removed. With an even distribution of displacement flow diffusers, even large halls (e. g. auditoria, industrial factories) can be air-conditioned without draughts in an economical manner.
rectangular
10 – 1,025 l/s
40 – 3,700 m³/h
24 – 2,177 cfm
L: 300 – 1,500 mm
H: 150 – 2,000 mm
As the largest airport in Spain, Madrid Barajas receives more than 40 million air passengers every year which makes it Europe’s main hub for flights to South America. It is also home to the Spanish Air Force. The architecture is impressive, too, and in 2006 Madrid Barajas was awarded the renowned British Stirling Prize.
Spain’s capital airport is characterised by the intricacy of its colourful, 1.2 km long Terminal 4 building. Its design placed high architectural demands on the air conditioning and ventilation system. The objective was to create a pleasant atmosphere for passengers, staff and visitors alike by means of a low-turbulence, draught-free air supply.
Passengers should feel safe and comfortable in Terminal 4. Top priorities were, hence, comfort, air quality and safety.
TROX was able to install its air conditioning and ventilation components and systems in nearly all sections of the airport to meet the very diverse requirements.
The displacement flow diffusers had been specially designed for Madrid Barajas and were installed in Terminal 4. Displacement flow diffusers prevent air turbulence and hence draughts. The convection from people and computers, for example, causes the air to rise and create comfortable conditions in the occupied zone. The warm, stale air is extracted near the ceiling. The air quality in the terminal is thus particularly high, with the temperature being maintained at comfortable levels. In addition to displacement flow diffusers TROX also installed fire dampers, sound attenuators and volume flow controllers.
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