CUMMINS DG set - Room Ventilation

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B.5 Enough opening / shutters should be provided to the
D.G. room so that entry and placement of D.G. set is
possible easily.
C. Room Ventilation
C.1 Ventilation of the generator room is necessary to remove
heat and fumes dissipated by the engine, alternator and
its accessories and to provide clean and fresh
combustion air. Ventilation requirement is mandatory
for all engines.
Improper ventilation can lead to :
- Poor fuel efficiency
- Poor performance of genset
- Failures of rubber components
- High exhaust temperature and related failures
- Unbearable working conditions due to higher room
temperatures
- High temperature rise in generator windings and
possible failures / insulation properties deterioration
C.2 Cross ventilation and free flow of cool, clean and fresh
air is must for satisfactory operation of DG set. Air should
flow from alternator end to engine.
C.3 For radiator cooled engines opening in front of radiator
should be 1.5 times radiator core and at back 2.25 to
3 times radiator core. Ducting in front of radiator is
recommended, however it is not mandatory.
If exact opening in front of the radiator is not possible
then ducting should be done to take out hot air.
If opening in the back side of genset is not possible
then opening on both sides of genset at the rear of the
alternator may be acceptable. In this case total
openings in two side walls should be atleast 3 times
radiator core.
C.4 Additional ventilation arrangement may be required for
radiator cooled engines installed in acoustic rooms/
enclosures. Typical arrangements is shown in C.4.
Radiator cooled engines may create slight negative
pressure inside the genset room / enclosure. Maximum
static restriction should not increase 6-mm of water
column.
C.5 Typically for heat exchanger cooled engines, forced
ventilation is required. This can be achieved by -
A) Providing forced air / axial flow fans at the rear side
of the genset as shown in C.5 (A). Suitable openings
in front (similar to that for radiator cooled genset)
should be provided.
B) Suction fan/s at front as shown in C.5(B). Multiple
exhaust fans may be required to generate sufficient
air flow in the room. Suitable opening at rear side of
genset (similar to that for radiator cooled genset)
should be provided.
Ref. C.2
Ref. C.5 (A)
Ref. C.4
Ref. C.3