Marine Engineering

22.07.2021
CYLINDER COVER TIGHTENING TOOL (MULTI—JACK)

This is another instructional video prepared by the B&W specialists and officially released by the company. The content of the video shall be thoroughly watched and clearly understood by all people involved in the subject operations.

The video was prepared by the recognized experts in the field so can be recommended not only to the industry professionals but even to the students willing to supplement their theoretical knowledge of the subject with visually available and perfectly explained training material.

Note that the duration is less than ten minutes; however, due to the concentrated approach this was enough for the authors of the film to explain the topic in detail.

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22.07.2021
ROLLS ROYCE PROMAS PROPULSION AND MANOUVERING SYSTEM

The short training video showing the Rolls Royce Promas propulsion and maneuvering system in detail. Subject system is a really novel design integrating the ship's rudder and propeller into a single system in order to provide optimization of the hydrodynamic efficiency.

This design implies fitting a special hubcap on the ship's propeller; subject hubcap is intended to streamline the flow onto a special bulb which is added to the ship's rudder - as a result, the flow separation is effectively reduced after the propeller. Eventually, the propeller's thrust increases since the energy which used to get wasted in the past, is now recovered from the water flow.

The bulb fitted onto the ship's rudder is also adding to the streamlining of the flow reducing the drag. The twisted design of the rudder is providing some further improvement in maneuverability and efficiency. Note that you will gain about 3-8% and 2-6% of additional efficiency for single- and double-screw vessels respectively.

In fact, any ship fitted with such system will benefit. It is much easier to watch this five-minute video and get even better understanding of the advantages that are offered to you by the Promas system.

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22.07.2021
HOW A THORDON COMPAC STERN TUBE BEARING WORKS

Here is a very short video animation briefly demonstrating the functioning of the sea water lubricated propeller shaft bearings by Thordon. Subject COMPAC bearings feature long and very predictable wear life and fifteen years of guaranteed service.

They have already proven effective in many commercial vessels - more than six hundred vessels today have Thordon sea-water lubricated bearings installed within their propeller shaft arrangements.

The vessel crew will not have to care about the leakage of oil from the bearings in case they get damaged since there is no oil used in them, and that is why there is no risk of environmental pollution.

They are also featuring much lower operating costs and offer many other advantages that will be appreciated by the ship owners...

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22.07.2021
MET—SC TURBO CHARGER — INSTRUCTIONAL VIDEO

This instructional video is devoted to the Mitsubishi MET-SC model of the turbocharger developed and manufactured by Mitsubishi Heavy Industries. Subject model has proven to be very reliable and efficient - it far excels any of the predecessors. Subject turbocharger is designed to be compatible with all two-cycle and four-cycle engines of Mitsubishi HI.

The content of this video will be of great practical use and interest to the people involved in the maintenance and repair of subject machinery piece during their work on board. The instructions are very clear.

Though the video is quote old, note that it is not outdated and provides engineers with all necessary information. By following the steps described in this video, you will be able to perform the periodic technical maintenance and overhaul of the turbochargers in a very effective and safe way’ this would eventually contribute to the overall safety and efficiency of all machinery on board your ship.

Now, let us see how the Mitsubishi MET-SC turbocharger is opened up and disassembled. To begin with, let us look at the step by step process of the MET-SC turbocharge being disassembled. This starts with the removal of the silencer…

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22.07.2021
MITSUBISHI TURBOCHARGERS VIDEO TRAINING

This is the official video training set developed by the specialists of one of the most recognized and world respected manufacturers of the diesel engines, including marine diesel engines. The content of this set of two lessons covers the turbochargers produced by this company. The training set will cover all major aspects of those turbochargers and provide good and detailed instructions.

It will be very valuable to any person involved in operation, routine technical maintenance and repair of subject piece of shipboard equipment. It is highly recommended to the above categories of specialists. Taking into account the approach used by the authors of these training videos, it may be used even by the people servicing the turbochargers manufactured by the other companies, since the physics of the process an principle of design and operation remain more or less similar.

However, it will be particularly useful to the engine room team of the ships with the subject equipment installed on board. Make sure you have these training files downloaded and saved for the training and future reference whenever required as this is a truly indispensable source of good technical information.

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22.07.2021
SHIP BALLAST OPERATIONS EXPLAINED

Watch this training video and you will have full information about the shipboard ballast systems. The ballasting and de-ballasting are considered one of the most important operations on board any vessel. There are many factors to be taken into account when performing those operations and failure to do that properly may result in the bad consequences. For example, the stability of the ship is directly connected with the daft which, in turn, depends on the ballast condition of the ship.

That is why due attention shall be paid to the stability aspects. In order to properly evaluate the ballasting operations we shall have a good understanding of how they are performed, and this is not possible without having a clear picture of the shipboard ballasting equipment. The key components of the ballast system are ballast pumps and piping arrangements including valves, and they are all controlled via the shipboard ballast control system.

The ballasting and de-ballasting are conducted either by gravity, i.e. using the natural forces, or, when that is not possible due to the position of the ship’s hull in relation to the sea water surface, by means of the pumps. This video will show all stages of the operations making it clear even for the beginners.

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22.07.2021
SAUER AIR COMPRESSORS VIDEO TRAINING COURSE

This video training course was developed and officially released by maybe the most famous manufacturer of the shipboard air compressors. The contents is arranged in several video lessons covering such important aspects as installation of the pump, its operation on board, periodical technical maintenance, checking the screwed connections, changing oil, replacement of the air filter cartridge, dismantling, checking and assembling new valves, checking the coupling, exchange of the piston rings, and exchange of the gudgeon pins and associated gaskets.

The course should be considered mandatory for all people dealing with subject compressors when working on board. The attention to the details is remarkable. Everything is explained in a very simple way. In addition to that, note that the course will be very useful to the crew members on board ships with other air compressors installed since the physics of the process remain more or less unchanged.. It will be greatly beneficial to all students to have a close look into these video lessons as they are really good supplement to whatever can be read in the books or in the service, operation and maintenance manuals.

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22.07.2021
OVER & UNDER PRESSURISATION OF TANKS

Oil, fuels, lubricants, chemicals are the lifeblood of our modern industrial world. The cargo is pressurized but volatile. Within the hull of the ship, each tank is sealed to maintain the cargo quality and protect the crew, the vessel and the environment. But the cargo is also dynamic, its volume changes all the time, very obviously at loading and discharging, and less obviously through temperature changes and vaporization.

The volume of the tank is fixed, so changes in volume of liquids and gases within the tank must be accommodated, or they will translate into changes in pressure. Tank bulkheads are thin; they are designed to operate within tight parameters. Typically at commissioning they are tested with pressures of around a quarter-bar and a vacuum of less than 1/10 bar. The forces are massive, enough to disturb frames, bulkheads and decks, causing catastrophic failures, explosions, fire and pollution.

This video sheds light on the important aspects of handling pressures within the cargo tanks of the vessels. The information and knowledge gained when watching this video lesson carefully, will be of great practical use for the people working on board and can eventually result in prevention of the negative consequences caused by either under- or over-pressurization of cargo tanks.

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