Hyundai DHY18KSEm Operation And Maintenance Manua page 16

Under normal conditions, the air volume generated
from the radiator's fan is enough to meet the
requirement of the working room ventilation.
The air inlet temperature of the engine shall be below
30 degree Celsius. If the air inlet temperature keep
rising above 30 degree Celsius, the engine's output
power will be reduced, and therefore fresh air from
outside shall be introduced into the generator set's
working room in a timely manner.
If the generator set is furnished with a remote
radiator, forced air circulation for the generator set
working room is a must. The forced air circulation
need two fans, one fan is responsible for air intake,
another is air exhaust, which exhausts hot air to
outside.
When the engine is furnished with propelled fan, it is
recommended that a separate pipe is needed to
exhaust the gas which generated from the crankcase
to outside. Otherwise the exhaust gas from the
crankcase will accumulate on the radiator, which will
cause the radiator stuck by dirty material, and as a
result, the heat‐sinking capacity will be reduced.
2.5.3
Exhaust
Our standard configuration diesel generator sets
provide accessories such as industry heavy silencer,
soft corrugated pipe and elbow etc. Users can design
the exhaust system of generator set working room
by themselves. When design and install the exhaust
system, please consider the following aspects:
◆Ensure the total exhaust backpressure no higher than
the maximum allowed value specified by the
engine(usually generator set's maximum exhaust
backpressure is no more than 5Kpa) Fix the exhaust
system to make sure the exhaust manifold and
turbo‐charger are not subject to the vertical pressure
and side stress.
◆ Reserve some space for hot shrinkage and cold
expansion.
◆Reserve space for generator set vibration.
◆Reduce exhaust noise level.
Overload of exhaust backpressure will cause
following adverse effect:
◆Output power loss
◆Fuel efficiency reduce
◆Exhaust gas temperature rise
Note:
When more than one generator set are installed, try
not to discharge all of the generator sets' gas from
one exhaust path. If no separated exhaust pipe is
allowed, under the condition that the total
backpressure will not exceed the generator sets' total
backpressure a moveable separate panel shall be
installed inside of the branch exhaust pipe so that to
prevent the gas from return.
In the exhaust system, soft corrugated pipe shall be
used to connect the exhaust pipe with the
turbocharger, this pipe has three functions as
follows:
◆Separate the diesel engine with vibration and the
weight of exhaust pipe.
◆Compensate the heat expansion of exhaust pipe.
If the diesel generator set is installed on the
anti‐vibration base frame, the corrugated pipe can
compensate sideway movement when engine start or
stop.
Note:
1. Serious damage will occur when rain or condensed
water enter into engine's exhaust system.
Therefore, one water discharge opening shall be
installed in the long exhaust pipe, the position of
which shall be close to the generator set.
2. When the top of the exhaust pipe is above the
architecture, lightening protection is needed
(connect to the ground)
2.5.4
Noise reduction
When diesel generator set is running, normally it will
generate noise level of 90～110dB, and the more the
load, the higher the noise level.
In order to meet the noise level standards established
by the local environmental protection bureau and to
prevent the noise pollution caused to ambient
environment, which will affect people's normal life,
to reduce noise level of diesel generator set is also
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User manual