bit es REPOR T
A ten-year plan has been launched to create a Cold War naval museum in Plymouth with the hunter-killer submarine HMS Courageous at its heart.
Polish yacht-builder Sunreef Yachts is hiring 200 new employees for its shipyard in Gdansk, Poland.
MACHINERY FAILURE CAUSED BY LUBRICATION CONTAMINATION CASE STUDY
The Swedish Club has described an incident of machinery failure onboard due to lubrication contamination in their system. An investigation showed that the engine had been operated on a high thermal load for a long time and the turbocharger’s efficiency had been affected by fouling, while the lubrication oil had been contaminated for some time.
The vessel concerned was at anchor, in ballast, awaiting further instructions. The weather deteriorated after seven days and the vessel’s anchor dragged. The anchor was heaved up and the vessel started to slow steam in the area. After about 24 hours, the differential pressure alarm of the main engine duplex lubrication oil filter sounded in the ECR. The crew found aluminium and other metal inside the lubrication filter. Metal particles were also found in the main engine’s crankcase.
Tokyo-based shipping company Asahi Tanker Co. has placed an order for the world’s first electric-powered tankers. The two tankers, which were ordered at Kawasaki Heavy Industries, will be 100% powered by large-capacity lithium ion batteries for zero-emission operations.
Japanese shipping company NYK Line, shipbuilder Japan Marine United Corporation and classification society ClassNK signed a joint R&D agreement for the commercialisation of an ammonia-fuelled gas carrier that would use ammonia as the main fuel, in addition to an ammonia floating storage and regasification barge.
After consulting the owner, it was decided that the vessel should be towed to a lay-by berth. The investigation alongside revealed that the metal parts found in the lubrication oil filters came from piston rings and piston skirts. Three pistons had almost seized. The main engine, a 6-cylinder medium speed type, was severely damage and the following parts had to be renewed: all the cylinder liners, 3 complete pistons, piston rings on all cylinders, all the main and connecting rod bearings. In addition, the turbocharger had to be overhauled as the nozzle ring was broken. The complete lubrication system had to be carefully cleaned and flushed due to the lubrication contamination.
Findings – At the time of the casualty the main engine, including the turbocharger, had been running for 7,300 hours since the previous major overhaul. This overhaul was done 18 months ago.
– Investigation of the maintenance records showed that maintenance had been carried out in accordance with the manufacturer’s instructions.
– All fuel oil analyses from bunkering were within specification. – Fuel oil samples before and after purifiers were taken and analysed. The result indicated that the purifiers were working satisfactorily.
– Several samples of the damaged piston rings were sent to a laboratory. The conclusion was that the excessive wear of the liners and pistons was not caused by catalytic fines.
– The cylinder liner lubrication system was tested and was found to be working properly.
– When reviewing the monthly main engine reports, it became obvious that the main engine exhaust temperatures of all the cylinder units had increased 30°C – 40°C since about six month ago.
– The turbocharger’s revolutions had dropped from about 14,500 rpm to 12,000 rpm at 85% load and consequently the charge air pressure as well from 1.7 bar to 1.2 bar. These changes occurred as well about six month ago.
– Due to high exhaust gas temperatures, the engine was under a high thermal load, which finally caused it to breakdown.
Spirit Yachts has successfully delivered its new 13.4m (44ft) Spirit 44CR (e) to her Canadian owner. The project is the first fully electric yacht to be designed and built by Spirit Yachts.
22 | The Report • December 2020 • Issue 94
The first Chinese built hybrid- electric emergency rescue vessel delivered to Shenzhen Maritime Safety Administration can be fully powered by batteries for up to three hours of operations.
Associated British Ports, the owner and operator of the Port of Lowestoft, has invested more than £250,000 in the construction of a new fuel bunkering facility.
The shipping industry could have lost up to 40,000 jobs as more than 50% of the people in shipping lines work from home now due to the coronavirus pandemic, Lars Jensen, CEO, SeaIntelligence Consulting believes.
Safety Briefings
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