The flow pattern for the inlet air into the room is influenced by the cooling capacity per running meter along with the outlet velocity through the textile. The outlet velocity through the textile air duct can be described as a linear function between the airflow and the surface area of the textile air duct.
Depending on the temperature difference between inlet air and room air, the air velocity in the main area increases by a factor of two to three times the initial outlet velocity, as the denser inlet air accelerates downwards. For this reason it is important to observe the outlet velocity through the textile air duct when sizing a system, as you can end up with velocities in the occupied zone 3 times higher than the initial velocity through the textile!
When the inlet air reaches the floor, it will spread out evenly over the floor area, and will at some point meet with a source of thermal load (typically persons, computers, production machinery, etc). The thermal load means that there will be am impulse in an upward direction, directly over the heat source. This motion causes the following string of events: the upward moving airflow will induce some of the static air at floor level. The colder inlet air (now at floor level) will flow in the direction of this area, to replace the air that was induced upwards. This cycle will continue as long as the thermal load is present and inlet air is being supplied.
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