Lube Oil Filtration, Main Engine, Diesel Electric Propulsion | Ferry
Application Study
System — Marine Diesel Engine
Vessel: Ferry M/F “TYCHO BRAHE”
Main engine: 3 engines type Wärtsilä 6R32 + 1 type 6R32 (LNE), each with 3,000 kW
Fuel: MDO, ULSD (ECA operation)
Lube Oil: Castrol MHP 154
Oil volume: 1.200 Liters
Ferry M/F “TYCHO BRAHE”
Challenge
On the M/F Tycho Brahe, the lubricating oil of the diesel-electric drive was still cleaned in a conventional way with a centrifuge for two engines. The cost of operation for each of the centrifuges amounted to EUR 13,000 — in total, 26,000 EUR per year. The principal costs occur for the energy consumption of the heating.
Solution: CJC® Lube Oil Filter
On the main engines, DG3 and DG4, a CJC® Lube Oil Filter 27/108 was installed — in standard design and a prototype. The standard filter was fitted on the DG3 main engine and the prototype — using a frequency controller and a higher flow — was fitted on DG4 main engine. The centrifuge was left running on the main engines DG1 and DG2 for reference.
Main engine Wärtsila 6R32
CJC® Lube Oil Filter 27/108
Oil Sample – Centrifuge
Main engine DG1 and DG2
Oil samples – CJC® Lube Oil Filter
Main engine DG3 and DG4
Advantages of lube oil care
The target was to deliver results equal to or better than the centrifuge. The objective was achieved from both CJC® Lube Oil Filters (the standard and the prototype version). For the crew, the result was impressive The crew reported visual oil appearance as “new oil” and a significant difference compared to the oil on DG1 and DG2 (with centrifuge). The direct benefit of installing the CJC® Lube Oil Filters was energy savings regarding the heating. Also, a substantial drop in lube oil consumption on the main engines DG3 and DG4 (with CJC® Lube Oil Filters) compared to the consumption on DG1 and DG2 (with centrifuge). The test was a success considering the savings and the gained results for more than 12 months.
Advantages compared to centrifuges
- less energy consumption to heat the oil (no heating)
- significant less oil consumption
- less diesel consumption and fewer emissions
- easier sludge handling
Payback time:
The savings are substantial. With a standard solution, the payback time is less than 7 months, and with the prototype solution, it is a little over 1 year.
Environmental benefits
Reducing energy consumption for heating the oil leads to a decrease in diesel consumption and thus lower emissions. Equally, the amount of sludge has been significantly reduced, so less new lube oil to replenish the sump is needed.
Diesel consumption per hour [Liter]
Centrifuge vs CJC® Lube Oil Filter
Customer comment
Senior C/E, Scandlines, Henrik Fald Hansen:
„The installation of the CJC oil filter has been an absolutely positive experience. The quality of the oil is as good as it was before, well, actually better in all aspects. The appearance of the oil has changed from dark to light and looks like new oil.
We are saving person-hours and chemicals we used to clean the centrifuge and have less of a mess in the engine room. We are saving on sludge production. The centrifuge is discharging every hour. For cleaning, we use displacement water. The oil loss generated during centrifugation contaminates the water. The formed sludge consists of approx. 0.2 litre of oil (oil loss) and approx. 2.5 litres of water (cleaning) and goes directly into the sludge tank. With 8,700 discharges annually, this corresponds to 1,740 litres of oil and 21,750 litres of water. The costs to dispose of the sludge amounted annually approx. EUR 2,013.
On top of that, we are saving a lot of lube oil. The oil loss during centrifugation and when the centrifuge fails amount to approx. 2,500–3,000 litres annually. At the cost of approx. 1.34 EUR per litre, we save 3,356 – 4,027 EUR each year.
In all aspects, a good investment, and if we are not switching to battery / electrical propulsion, we will definitely also install oil filters on engines DG1 and DG2.“
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