WÄRTSILÄ 46F Series, Product Manual

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- Example: ß
20
= 75 means “every 75 particles 20 micron ISO dust sent, one passes”.
- Efficiency
ε
xx = YY % : same meaning as Beta-value, but not any ISO standardised test
method, hence sometimes used for particles larger than 25..45 micron.
- Example:
ε
20
= 98,7% means “every 75 particles 20 micron non-ISO dust sent, one passes,
which is 98,7% stopped.”
6.3.2 Fuel heating requirements HFO
Heating is required for:
●
Bunker tanks, settling tanks, day tanks
● Pipes (trace heating)
●
Separators
● Fuel feeder/booster units
To enable pumping the temperature of bunker tanks must always be maintained 5...10°C
above the pour point, typically at 40...50°C. The heating coils can be designed for a temperature
of 60°C.
The tank heating capacity is determined by the heat loss from the bunker tank and the desired
temperature increase rate.
DAAB605814 6-11
6. Fuel Oil System Wärtsilä 46F Product Guide