Engine-Room Ventilation; Installation Of Air Filters - Kohler SFGLD480 Operation & Maintenance Manual

4. ENGINE-ROOM VENTILATION

The correct ventilation of the engine room allows the correct engine performance; especially in the case the
engine takes the air from the room.
In designing a ventilation system, the same importance should be given to the necessary volume of air as to the
flow direction.
The ventilation system must be able to provide sufficient combustion air and to remove radiation heat from the
rest of the facility.
For an estimated thermal difference of 5ºC (9ºF) between inlet and outlet air temperatures, the air inflow must
be in the region of 70 m
ENGINE TYPE
WATER-
COOLED
TURBOCHARGED
Generally, the air flow direction in an engine room will match the following pattern:
The entry of air in the engine room should be from the area furthest away from any sources of heat.
-
The fresh air should be able to flow freely from the point of entry to the sources of heat, in its circulation
-
towards the point of exit.
The expulsion of hot air should be at a point directly above the most important sources of heat, avoiding the
-
intake of the exhaust gas.
Where the temperature of the engine room or, in particular, of the crankcase gases return lines to the
-
intake manifold is too low, the said lines must be heat-insulated so as to prevent condensation in the said
piping section.
In all cases, the hot air should be forced out of the engine room by means of an outlet duct, without allowing it to
mix with the fresh ventilation air.

5.2 INSTALLATION OF AIR FILTERS

The filters should be installed in every case in the most optimum place according to the layout of the engine
-
room.
- A sufficient quantity of combustion air should be guaranteed.
- In case of an external air inlet, avoid any risk of water entering into the filter.
The minimum cross section area (S) of air flow through the filter protector derives from the following equation:
-
The air duct between the filter and the engine should be made of metal with a circular or rectangular section.
-
The maximum admissible pressure drop after filter, measured in the air intake duct, should not be bigger
-
than 381 mm.w.c. relative to external atmosphere. It is recommended to keep approximately 81 mm.w.c. in
reserve, that is to say that with clean filter the maximum pressure drop shouldn't exceed 300 mm.w.c.
PRODUCT INFORMATION
IT-G-A-00-008e
EMISSIONS - RELATED INSTALLATION INSTRUCTIONS
3
/h per 1kW installed power. See the following table for air flow rates.
EXHAUST MANIFOLD
EXTERNAL FILTER
INTERNAL FILTER
EXTERNAL FILTER
DRY
INTERNAL FILTER
(where S1 = developed area of the filter)
INDEX
A
AIR INTAKE ENGINE
3 3
ft /hHP m /hkW
0 0
263 10
0 0
263 10
S = S1 x 2
4.1.56
DATE
February 2010
O&M_2.002211.810_A_10_2016
AIR FLOW RATE
ENGINE ROOM
VENTILATION
3 3 3
ft /hHP m /hkW ft /hHP
1580 60 1580
1580 60 1843
1580 60 1580
1580 60 1843
Dep. 2
TOTAL
3
m /hkW
60
70
60
70
4/5