Case Study: BBC Sealand Main Propulsion Engine
BBC Sealand in the harbour of Dampier, Australia |
Main propulsion engine MAN |
Rewitec developed the Nanotribologic Coating in order to revitalize and prevent the wear of combustion engines, gears, transmissions, and bearings. With this technology, it is possible to clean carbonized and worn surfaces and coat them for a renewed machine life.
The vessel BBC Sealand had high oil consumption and a weak cylinder compression in the main engine MAN-B&W (4,235 KW, 4 strokes, 7 cylinder). The heavy carbonization in the engine was another factor that caused concern.
While sailing from Dampier (Australia), the engine was treated with Rewitec-Nanotribologic Coating.
The reduction of oil consumption was critical for a successful motor treatment. In the first 48 hours, the cylinder compression had already improved by 40%.The daily recorded oil consumption showed that on a period of 4 weeks after the treatment, consumption decreased 30%. This saved 100 litres, or about 27 Gallons, a day!
Rewitec had a remarkable result for the shipping company. With around 5,000 service hours a year, the reduced oil and fuel consumption and the elimination wear and cylinder carbonization means savings of around $27,000 per year.
Without Rewitec, an engine repair replacing cylinders and parts would have taken several days. The break-in time of the repaired motor was also avoided. The Rewitec coating process takes place during service at full load and causes no down time for the vessel. This can equal cost savings of $1 million. The extended machine lifetime is still enjoyed by the BBC Sealand today.