Operation At Low Load And Idling; Low Air Temperature - Wartsila 31 Product Manual

2. Operating Ranges
2.3

Operation at low load and idling

Table 2-1
Load
0%
2%
17.5%
Fig 2-4
2.4

Low air temperature

In cold conditions the following minimum inlet air temperatures apply:
● Min 5ºC
For lower suction air temperatures engines shall be configured for arctic operation.
For further guidelines, see chapter Combustion air system design.
2-4
Idling and low load operation restrictions
LFO, max continous HFO, max continous
time [h] time [h]
15
50
300
Low load operating restrictions
1) Above 17.5% load there is no additional restriction from low load operation.
2) Duration of low load only applies if charge air temp in receiver is at:
- LFO: 35C or above
- HFO: 45C or above
3) High load running (minimum 70%) is to be followed for a minimum of 60 minutes to clean up the engine
after maximum allowed low load running time has been reached.
10
10
200
NOTE
Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide