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HIGH IMPULSE SYSTEMS

USING FLOW MODELS   All KE Fibertec’s textile based ventilation solutions are 100% customised. Any direction can be chosen for the holes in the KEInject System and for the nozzles in the KE-DireJet System. Depending on the system’s usage, the holes/ nozzles can be pointed in any direction, specified at an angle from 12 o’clock.

-30°

30° 60°

-60°

90°

-90°

120°

-120° -150°

180°

150°

Both the KE-Inject System and KE-DireJet System are highly flexible systems and any direction at all can be chosen for the air jets. It is obviously important for the air jets to point in the main direction of the air flow following the desired air flow pattern in the room. As mentioned earlier, it is also important that the air flow is directed downwards towards the occupied zone when heating is required in order to prevent short circuiting. Apart from choosing the main direction for the air jet, secondary nozzle positions can be used. For instance, if the ceiling needs to be coated locally to avoid the formation of condensation or part of the area needs to be cooled down/heated, it is possible to direct individual nozzles or holes towards the relevant area. Nozzles can also be left out entirely in sections of the duct if no air needs to be supplied. KE Fibertec uses three different flow models for textile based mixing ventilation in its everyday activities, which are flow models 1, 2 and 3 respectively. To be able to use KE Fibertec’s datasheets properly, you need to know which flow model is involved as all the datasheets have been specified for flow models 2 and 3, i.e. free jets. It is important therefore to clarify what the user wants and needs in terms of the system, as well as to become familiarised with processes and activities before starting to dimension the final design for the high impulse system. Using flow model 1 (wall jet) can bring some benefit, even though the throw length increases as a result of the Coanda effect. Air jets tend to become more stable when cooled air is delivered, while the risk of a drop of cold air or draughts in general in the occupied zone is kept to a minimum. The Coanda effect also makes the blanket of air “stick” to the ceiling, which means that it will not be deflected by local heat sources, obstacles etc. Consequently, there is a greater likelihood of achieving the desired flow pattern in reality than with delivering an free jet. As was mentioned before, it is recommended to use flow model 2 or 3 for both the KE-DireJet System and KE-Inject System if the system is going to be used to provide heating. This will then eliminate the risk of the supply air being short circuited.

FLOW MODEL 1

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FLOW MODEL 2

FLOW MODEL 3

Profile for KE Fibertec

TEXTILE BASED VENTILATION  

Welcome to our online catalogue on Textile Based Ventilation. Here is all you need to know on air distribution with textile ducts tailored t...

TEXTILE BASED VENTILATION  

Welcome to our online catalogue on Textile Based Ventilation. Here is all you need to know on air distribution with textile ducts tailored t...

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