Choice of fan
The fan must be dimensioned for airflow according to
the following:
Outlet air (m
3
/min) = 0.07 × engine power (kW)
The
total pressure increase at the fan must be 10 mm
(0.39") water gauge (100 Pa).
These two values, flow and total pressure increase, are
sufficient for selecting a fan. If the fan is installed
directly on the bulkhead, i.e. without a connecting duct,
the total pressure increase value may be reduced by 7
mm (0.28") water gauge (70 Pa). This means that a
somewhat smaller fan may be used.
Arrangement and Planning, Engine Room
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