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+--- Thread: Marine Propulsion Systems: More Than Moving Ships Through the Water (/showthread.php?tid=904)
Marine Propulsion Systems: More Than Moving Ships Through the Water - potjuicd - 10-14-2021
Marine Propulsion Systems: More Than Moving Ships Through the Water
Marine Propulsion Systems move ships through the water, ensures a better safety standard for the marine ecosystem and are cost-efficient. Worldwide goals have been set for emission reductions for the maritime sector.
"The IMO is targeting a reduction in the carbon intensity of international shipping by at least 40% by 2030 compared with 2008 levels, and by 70% by 2050. The IMO took this action to support the United Nations Sustainable Development Goal 13, to take urgent action to combat climate change and its impacts."
The most commonly used type of marine engine is the reciprocating diesel engine that has a higher efficiency compared to other models. These engines can be classified into three types based on their revolutions per minute (rpm).
The three categories- slow, medium, and high speed have their own benefits based upon the type of ship to be powered.
For instance, large ships require a low speed but high torque propulsion system to power them. For such vessels, a low output speed engine can be selected.
The issue with using slow-speed engines is the large space they take up as compared to the other engines. Thus, a space-effective solution would be to install high-speed engines in the ship, and then reduce the torque before it reaches the propellers.
For this, a gearbox is a very useful component that can be used to manipulate rotational torque transfer. It is attached to the Marine Propeller Shaft and reduces the power transmitted to the propeller.
The slow speed engines pose no problem to the transfer of torque and do not require an additional gearbox. The gearbox in the other speed engines is attached in between the intermediary and propeller shafts.
Our company produces a full range of standard and customized Marine Deck Equipment and winches. Available systems include horizontal and vertical windlasses, winches and winches for various applications. The available models can be constructed according to applicable commercial standards.
All of our Marine Crane designs have been specially developed and improved for operation in the marine environment. All structures have been designed to take up heavy lateral forces and to have a low value of elastic deflection under load. All parts have been designed and protected for easy maintenance.
Threats are posed by inputs of persistent pollutants (for example substances that are non-degradable or not readily degradable in water) and excessive nutrient inputs via rivers, as well as the widespread transport of pollutants via the atmosphere (see info: Environmental Status of European Seas). As a result, organic pollutants such as polychlorinated biphenyls (PCBs), which were formerly used as insulation, hydraulic or cooling fluids, can be detected in remote polar regions. Other hazards to the marine environment are caused by shipping (for example illegal disposal of wastes, accidents, problems caused by antifouling paints) and inputs of oil and pollutants from the offshore oil and gas industry. Marine ecosystems are also endangered by overfishing and other negative effects of fishing on marine species and habitats. A further threat is that of climate change and entailing effects such as sea level rise and shifts and changes in flora and fauna of certain sea areas.
As pollution of and processes in the oceans do not stop at political borders, successful Marine Environmental Protection can only be achieved by means of intensive international cooperation at regional and global level.
The various advantages of advanced outfitting are as discussed below:
1. Shorter Cycle Time: Since Marine Outfitting Equipment is done in parallel to hull fabrication, the total cycle time, that is, from the date of contract signing to the delivery of the ship, is reduced considerably. Accordingly, more number of ships can also be built in a year, therefore giving leverage to the productivity of the shipyard.
2. Better Working Conditions: Since outfitting in block stage is carried out in a workshop atmosphere, the efficiency of the work force will be more because of the improved lighting and better ventilation. Modern shipyards also incorporate efficient human factors to ensure optimum level of workshop productivity.
One of the primary reasons for dock injuries – and in some cases fatalities – are Marine Mooring Equipment lines. Many of these incidents see what is referred to as snap back occurring, a process in which a sudden release of energy causes the two ends of the line to recoil or ‘snap back’ with high speed and force – causing individuals within the proximity to be struck by pieces of line.
Throughout the years many such mooring line incidents have occurred, leaving individuals with serious injuries, from these accidents 14% have led to fatalities.
Alongside this, injuries can occur from individuals being hit by parting ropes, equipment being old and faulty or the wash of other ships passing by causing mooring ropes that have not been correctly tied to snap off.
Lifeboats are the primary Marine Life-saving Equipment used when the crew and passengers are supposed to ‘abandon’ the ship and need out of water support. They must be available in sufficient quantity and support the required capacity and size such that the total number of persons on board can be evacuated from either port or starboard. ( This is done so that in case the ship is capsizing to one side, say port, the lifeboats can be lowered from the starboard side and everyone on board can be saved.)