Hall ventilation IN INDUSTRY
What is there to consider in a hall ventilation system?
Hall ventilation is primarily used to exchange exhaust air and fresh air in a production hall. Released emissions such as smoke, dust or oil mist must also be effectively filtered out of the exhaust air to protect employees and the environment. When planning an energy-efficient ventilation system, the design, size and thermal insulation are just as decisive parameters as the working hours, number of workplaces and amount of pollutants (smoke, dust, etc.).
Mechanical or natural ventilation?
Natural ventilation, which usually takes place by opening windows, doors or gates, reaches its limits in large room volumes and cannot be sufficiently implemented in autumn and winter . Furthermore, there are valid workplace regulations for filtering emissions that get into the breathing air during welding, deburring or polishing.
Mechanical ventilation systems are therefore usually used in industrial halls. These continuously filter large amounts of air and automatically supply the hall with fresh air. Pollutants such as smoke, dust or oil mist are efficiently filtered out of the breathing air.. Effective heat recovery can also save up to 70 % of heating costs.
Centralized and decentralized ventilation systems?
Central hall ventilation systems can be more efficient and economical than point extraction systems. They consist of an extraction systemin which the polluted air is filtered. A permanently installed Pipe system is used to collect and supply exhaust air and fresh air. The extraction system or filter unit can be located inside or outside the hall . The process is particularly suitable for large production halls with several workstations or for processes with high levels of smoke/dust.
Decentralized ventilation systems, on the other hand, extract the polluted air at specific points, e.g. via an extraction table, and clean them via a extraction system. However, the entire hall air is not circulated, and the warm, contaminated air may collect under the hall ceiling.
Filter towers also serve as decentralized ventilation systems. They draw in the exhaust air, filter it and feed the cleaned air back into the hall via a ventilation grille. As plug & play ventilation systems, they have the advantage that they can be installed quickly and are immediately ready for use.
Filter towers for hall extraction
Plug & Play – immediately ready for use
Techniques for industrial hall extraction
Layered Ventilation:
In the principle of layered ventilation, the cleaned air is supplied via displacement outlets close to the floor. The fresh air mixes again with pollutants, heats up and rises to the top due to its thermal properties, where it is extracted and cleaned via the exhaust air duct on the hall ceiling.
Mixed ventilation (Push-pull):
In so-called push-pull mixed ventilation, the cleaned air is introduced via long-throw nozzles of the supply air duct on the hall ceiling and sucked in on the opposite side through exhaust grilles of the exhaust air duct. Mixing of the hall air occurs primarily in the upper third of the hall, where the warm air and polluted air collects. Mixing of the hall air occurs primarily in the upper third of the hall, where the warm air and polluted air collects
Displacement ventilation:
With this ventilation technology, the incoming fresh air displaces the exhaust air. Large air diffusers are required to ensure sufficient air exchange. This usually makes this technology uneconomical for large halls. Even for small halls, the necessary energy costs should be compared.
Energy saving through hall ventilation systems
with heat recovery
For ventilation systems in industry, the use of heat exchangers is now even required by law. The warm, polluted air is used to heat chambers through which the fresh air flows. In this way, energy costs can be saved by up to 70 % and resources can be conserved.
Advantages of hall ventilation
Efficient filtration
of pollutants
Effective
Heat recovery
Constant
room temperature
Healthy
indoor climate
High
air quality
Suitable for any
hall size
and any production process
Assembly & installation
Before installing a hall ventilation system, a situation analysis and personal consultation with experts is recommended, as assembly and installation are associated with not inconsiderable costs.
