Fuel/ Emissions Flashcards
What type of fuel do you use?
Marine Diesel DMA
What’s the reason for low sulphur fuel?
Low sulphur fuel is to reduce emissions of sulphur dioxide (SO2), a harmful air pollutant as it contributes to acid rain.
Do you test your fuel samples and what are you looking for?
Yes, we use a company called VPS. On board when bunkering I would look at the appearance, I want it clear and bright as this proves no water, bugs or dirt is inside.
When sending off to VPS our main focus is Density, Sulphur, Water, Flash point, Cetane index and Viscosity
What are the values required for your fuel? (Density, Sulphur, Water, Flash point, Cetane index and Viscosity)
Density @ 15c - 890kg/m3
Sulphur - 0.1% for ECAS and 0.5%
Water - Zero
Flash Point - 60c
Centane index - 40 min
Viscosity - 6000mm2/s to 2000mm2/s
What is annex 6 of MARPOL and what does it include?
Regulations for the Prevention of Air Pollution from Ships
SOX emission must be below 0.5% and when in a SOx Emission Control Area (SECA) it must be below 0.1%
Engines must confirm with NOx regulations that are tiered depending on year built. We are a Tier III vessel meaning we must have an Selective Catalytic Reduction (SCR) to reduce the NOx.
What is an ODS Log?
Ozone-Depleting Substances log is a record-keeping document used to track the use, handling, and disposal of ozone-depleting substances
What are the SOx and NOx Limits?
SOX emission must be below 0.5% and when in a SOx Emission Control Area (SECA) it must be below 0.1%
NOx regulations that are tiered depending on year the engine is built. We are a Tier III vessel meaning we must have an Selective Catalytic Reduction (SCR) to reduce the NOx.
Where can you find this information?
MARPOL Annex 6
How would you ensure you are within in tolerance?
Have your fuel tested by taking samples during bunkering
What are the 3 Tiers?
This for the NOx (Nitrogen Oxide)
Engines built between 2000 and 2011 must have a 20% reduction, know as tier 1
Engines between 2001 and 2016 are tier 2
Engines from 2016 onwards are tier 3 and have about an 80% reduction due to exhaust recirculation or catalytic converters
What are the emission limitations for NOx in g/kWh? and where to find them?
Tier I - 17.0 g/kWh for engines with a power output of more than 130 kW.
Tier II - 14.4 g/kWh for engines with a power output of more than 130 kW.
Tier III - 3.4 g/kWh for engines with a power output of more than 130 kW
The are published by the IMO and found in MARPOL Annex 6
What are the critical components for NOx and how are they documented?
- Exhaust sytem
- Fuel system
Technical file
How do engine manufactures meet emission tier requirements?
- Improving Technology
- Installing Selective Catalytic Reduction (SCR)
- Installing Exhaust Gas Recirculation
- Improving combustion
- Using specific fuel
Where are the SOx special areas?
- Baltic sea
- North sea
- North America ECA
- United states and Caribbean ECA
What temperature is it unsafe to store fuel?
For my vessel as we use DMA, anything under 60 degrees is unsafe as its flash point is 60
