Blending On board system

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Blending On board system

A system and support service to optimize overall engine lubrication performance and costs

Optimize the overall engine lubrication performance and costs with the help of the Wärtsilä Blending on Board (BOB) system and Engine Lubrication Management support services. The cylinder lubricating oil is blended from used system oil and additives for achieving the required properties. This enables the lowest possible feed-rate and keeps the engine clean.

Blending on Board system

Key benefits

  • By producing blended cylinder oil from used system oil plus additives, the costs compared to using commercial cylinder oil are reduced
  • Engine “cleanliness” and a reduction of deposits due to the regular replenishment of new system oil in both the main and auxiliary engine
  • Reduced frictional losses with positive effects on fuel oil consumption
  • Improved supply security by sourcing of the system oil
  • Payback time on investment is within 2 years, depending on the engine type and operating conditions

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Engine operational versatility, in terms of the operating load and heavy fuel oil quality, has a profound effect on operating costs. Furthermore, constraints related to emission controlled areas and new fuel regulations call for more flexibility while maintaining reliable engine performance.

High sulphur fuel and harsh operating conditions require increased cylinder oil performance for neutralization, detergency and dispersancy. Extended engine operation with low sulphur fuel, or even Marine Diesel Oil or Marine Gas Oil, is also required. These conflicting requirements are usually addressed by using two cylinder oils (typically 40BN and 70BN) and a sulphur dependent feed rate adjustment, according to the engine manufacturer’s recommendation. This is to be able to cope with the variability of the fuel’s sulphur content, particularly when in reduced load operation.

The Wärtsilä Blending on Board system provides a unique, flexible solution to these challenging requirements. The concept is to keep the constant low cylinder oil feed rate optimal, while adjusting the base number (30-120 BN) according to the fuel sulphur content in relation to the relevant regulations and the engine operational load pattern.

Additional significant advantages of the BOB system include the replenishment of the main engine with new system oil, and the auxiliary 4-stroke engine oil with new lubrication oil. The XRF analyzer will also allow a continuous monitoring of various engine fluids, including an analysis of the true FE content for both corrosive and abrasive iron wear.

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