Lube Oil Filtration for 4-Stroke Diesel Engines | Chemical Tanker
Customer Case
Marine Diesel Engines
Vessel: Chemical tanker, 19,800 GT
Engines: 4-stroke diesel engines MAN L23/30H, 800/960 kW (3 pieces)
Lube oil: Chevron TARO 30 DP30
Fuel: HFO RMG < 380 cSt, Sulphur: < 3.5%
Test: Centrifuge vs CJC® Lube Oil Filter
Test period: 8 months
Engine running hours: 4,982 RHs during test period
Last total oil change: at start of the test after 3,107 hours
Conventional lubrication oil treatment:
One separator for three engines (DG#1, DG#2 and DG#3) as well as one centrifugal by-pass filter („glacier filter“) for each engine.
Newly installed CJC® Lube Oil Filter:
During the test period, a CJC® Schmierölfilter 27/108 for continuous fine filtration and drying (24/7/365) was installed on each engine. The automatic temperature controlled flow ensures optimum operation and the highest filtration efficiency.
Pump flow: 280 L per hour (0.3 L/kW) nominal
Conclusion of the ship owner
Approx. 40-60 % lower lubricating oil consumption
The lube oil consumption decreased by 40 – 60 % (no sludge, improved engine performance). The extended oil lifetime and provided long-term lubrication is a result of the cleaner oil achieved by the enormous filter efficiency.
Less CO2 emissions – over 52,000 kg CO2 saved per year
Approx. 10,400 kg CO2 per year and vessel are saved because the amount of sludge to be disposed of decreased by Ø 4.000 litres. Thermal disposal of waste oil and sludge causes approx. 2.6 kg CO2 per litre. In total five vessels are retrofitted with CJC® Lube Oil Filters.
Engine reliability
To be able to verify if engine reliability improved, the full period of engine running between revisions must be monitored and analyzed. The maintenance and service time spent by the crew is an important indicator. The crew involved in the test evaluate the project as positive:
- easy to operate by the crew
- minimal maintenance requirements (insert replacement)
- Plug-and-Play-Installation
The improved oil cleanliness reached by the CJC® Lube Oil Filter has a positive impact on engine reliability.
Savings– more than 66,000 EUR per year
More than 13,000 EUR are saved per year and vessel by using the CJC® Lube Oil Filter. In total five vessels are retrofitted with CJC®,.
| Specific lube oil consumption | ||||
|---|---|---|---|---|
| Engine DG#1 | Engine DG#2 | Engine DG#3 | ||
| Running hours | 1.145 | 8.069 | 6.680 | |
| Oil consumption [L] | 1.805 | 2.685 | 2.260 | |
| SLOCMCR* [g/kWh] | 1,58 | 0,33 | 0,34 | |
*) SLOC = Specific Lube Oil Consumption
MCR = Maximum Continuous Rating
| Savings | |
|---|---|
| when retrofitting the CJC® Lube Oil Filter | |
Energy consumption
Centrifuge:
|
5,100 EUR |
Oil consumption
∅ approx. 4,000 L x 1.06 EUR/L |
4,240 EUR |
| Maintenance, spare parts | 4,000 EUR |
| Annual savings per vessel | 13,340 EUR |
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