| It is also possible in principle to supply cooling air to compressors by way of ducts. However, an air inlet duct reduces the induction volume flow (dynamic pressure ) and thus has a negative effect on the output of the compressor. For this reason, cooling air should only be supplied through ducts in the following situations:
- Unclean environment.
The induction air at the location of the compressor contains a high proportion of dirt, dust, chemical impurities or it contains too much moisture. Under these conditions the air supply should be drawn from a cleaner part of the building.
- High ambient temperature.
The temperature at the compressor’s location is distinctly higher than that in neighbouring rooms or outside the building. This is possible if a lot of heat is given off by systems and machinery in the compressor room.
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