Every vessel will have an ideal or preferred spot for a generator. Ambient air temperature must be considered when selecting a location for the generator. Even though most marine engines are water cooled, there will always be radiant heat from the engine. Also, many generator ends are air cooled with their own internal fan, thus adding more heat to the compartment. This effects the air needed by the engine for combustion. Remember, combustion air temperature will effect performance. If the ambient air temperature in the compartment exceeds 120 degrees F., significant loss of performance may occur.
- Ambient Air Temperature
- Clearance for proper Exhaust System pathway
- Proper elevation for Percolating Muffler location
- Access to Raw Water for Heat Exchanger
- Access to cool Combustion Air
- Ample clearance for support structure and platform
Extended operation at ambient air temperatures above 120 degrees F. may even damage the unit. (Most engine generator manufacturers will provide operating specifications.) Therefore, the compartment should be well ventilated. If necessary, forced air flow must be installed.
This temperature problem is not unique -- it effects all engines. Engine output ratings are commonly measured at an ambient temperature of 68 degrees F. at sea level. A typical de-rating is 3% per 20° F. increase above ambient temperature. Most installations never get involved with this problem, however, we have seen installations in the main engine room where ambient temperatures were as high as 130 degrees F.
The Entec West generator set is far less restrictive in location choices than generators by other manufacturers. The EW-4200D uses a fresh water cooled engine AND a fresh water cooled generator. The engine has a water cooled cylinder, a water cooled cylinder head, and a water cooled oil heat exchanger.
The generator has a water cooled shell that directly cools the stationary stator assembly. The outside of the generator housing also provides cooling for the radiant heat produced by the engine. This total system approach permits the unit to be
installed in our Sound Enclosure without the need for external cooling air.
Yes! We do need cool air for combustion. If you decide to install the unit in a closed compartment or enclosure, contact us for instructions about how to get fresh combustion air to the engine.
If the unit is going to be installed without our Sound Enclosure, the previously mentioned temperature considerations must be addressed.