Diesel Gen-set Operation Instructions
36
ventilation system when necessary.
Suggestion: effective air intake/exhaust area of 10~50kW series Gen-set shall not
be less than 0.6m
2
and 0.5m
2
respectively.
6. Smoke exhaust system
Smoke exhaust system refers to the exhaust pipe connecting from smoke exhaust port
of diesel engine to outside of the equipment room. The exhaust system consists of
silencer, bellow, flange, elbow and gaskets associated with the engine, as well as
exhaust pipe connecting it to outside of equipment room.
Design of smoke exhaust system of the Gen-set shall meet following requirements:
6.1 Allowable maximum exhaust back pressure of diesel engine shall not exceeded,
or performance of diesel engine would be influenced, power of diesel engine would
be reduced and fuel consumption, exhaust temperature and emission shall be
increased. In order to reduce exhaust back pressure, following measures shall be
taken:
1) Number of elbow shall be reduced as much as possible and the number of
90°elbows shall not be more than three;
2) Internal bending radius of 90°elbow shall be no less than 3 times the diameter;
3) Total length of exhaust pipe shall be shortened as much as possible.
6.2 The exhaust system shall be equipped with expansion joint to adapt to
unreasonable installation of exhaust pipe or rigid deformation caused by thermal
expansion during operation of the Gen-set and absorbing vibration of exhaust system
parts.
6.3 Fixation of exhaust pipe: exhaust pipe shall be supported and fixed with the help
of buildings or steel structural. If exhaust system is fixed by suspension on ceiling,
exhaust pipe shall be at least 2.5m high above the ground in order to ensure safety of
personnel travelling across the ground and prevent accidental contact.
