EMMIF: Getting Heavy With Bunkers
Higher viscosity bunker fuels do not automatically contain more harmful elements than lighter ones, according to ExxonMobil Marine Fuels (EMMF), which has recently been supplying 500 centiStokes fuel in response to customer demand.
Emphasizing that quality and safety must be prime considerations with all fuel supplied, irrespective of viscosity, EMMF says the two crucial prerequisites for using 500 cSt fuel are the ability to heat it to a sufficiently high temperature to inject it into the vessels' engines, and the provision of purification equipment able to deal with the higher specific gravity of the product.
The fuel must be maintained above its minimum pumping viscosity while in storage awaiting use.
Storage tank heating coils are required, which are able to maintain the fuel at a stored temperature at or above 45 degrees C. Modern purifier systems are capable of ensuring that the fuel is effectively and sufficiently cleaned. Finally, the ship's main engine fuel oil pre-heaters must be able to raise the fuel to between 140 and 155 degrees centigrade. At these temperatures the new fuel is at the typical engine fuel injection viscosity of between 15 and lOcSt.
The additional heating required to use the 500cSt fuel should be easily covered at sea by the vessel's exhaust gas boiler. In port, the boiler will typically consume extra fuel to maintain oil storage tank temperatures.
But EMMF points out that, given the saving in the initial cost of the 500cSt product and the limited in-port time of many vessels today, there is the potential for significant savings to be made.
Many shipowners are now able to benefit from the possible cost savings involved in using heavier fuel without impairing the performance of their vessels.
EMMF says that shipowners whose vessels can use the fuel may realize considerable economies over the course of a vessel's annual operational life.
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Other stories from May 2003 issue
- NASSCO Delivers First of ORCA Class page: 10
- Aerodynamic Garage Ships page: 12
- RoPax Milestone page: 14
- Safe Boats Wins 700- Boat, $145-M Contract page: 17
- "I'm Looking Through You" page: 18
- Damen Offers Disaster Prevention Vessels page: 22
- NCL Acquires S/S United States page: 23
- Farstad Shipping Goes Big page: 24
- Frontline Continues to Blaze a Path page: 24
- Solid Roots to Withstand Future Storms page: 25
- The Best of Both Worlds page: 26
- MP: Eying Patrol Potential page: 30
- DNV Maritime: Changing of the Guard page: 31
- Small Tankers, Huge Market Potential page: 33
- Knutsen OAS Shipping Leads Gas Shipping Charge page: 34
- Nor-Shipping 2003: Bigger Than Ever page: 37
- Tribon M2 Enhanced Again page: 39
- Optimized Data Communication at Bergesen page: 39
- SES Electrical Sees Bright Future page: 39
- An Innovative LNG Carrier Concept page: 40
- A Multi-Billion Opportunity page: 40
- The Wartsila Dual-Fuel Engine page: 41
- Aluminum Gone "Bad" page: 42
- Integration Of AIS And ECDIS: More Information, Better View, Improved Safety page: 46
- Robert Allan: Naval Architecture is in the Blood page: 50
- Custom Solutions page: 52
- The Big One: L.A. Fireboat 2 page: 53
- Propulsion Stays Firmly Based on Diesel Engines page: 54
- Bunker Industry Fueled by Word Affairs page: 56
- Lube Oils on Test page: 57
- EMMIF: Getting Heavy With Bunkers page: 58
- Onboard-Napa Power Yields Fuel Savings page: 58
- Algae-X — Optimal Fuel and Oil Quality page: 61