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Most of the heavy machinery on a cruise ship is located on the lower decks, just above the keel. The positioning of the engine room, other machines, and technical equipment give the massive vessels a lower center of gravity. The cruise ship engine room is both mysterious and fascinating because it’s hidden from passengers. Nowadays, modern ships have a glass-enclosed bridge on the upper deck near the front of the ship. Because of it, the captain and the crew get a clear view of the forward direction. Surrounded and open air, wing-like extensions are perched out from both sides, extending the crew’s ability to see the ship’s rear side and then down to see the water through the windows.
LNG-powered cruise ships
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In 1948 it was adopted by the International Maritime Organisation and is generally considered the current standard by which ships are measured for safety. The Act has been modified a number of times over the years with the most recent change going into effect in 2010. It is these guidelines that are primarily responsible for the change from steam to gas or electric turbine power.
How cruise ships work: An interview with our Chief Engineer
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They can turn 360 degrees for maneuverability, and the rpm of the propeller varies depending on the required ship speed. Added to the dual-fuel engines, the new technology makes Viking Grace one of the world's most environmentally-friendly passenger ships, operating with very low levels of emissions and noise. Norsepower's wind propulsion system was also installed on VIKING LINE's newest vessel (still unnamed) scheduled for delivery in 2020.
Cruise Ship Engine Power, Propulsion, Fuel
Diesel-electric engines are popular because of their ease of control, low noise, minimal vibration, and relatively compact size compared to other forms of propulsion. A shaft generator converts the circular motion of the propeller shaft into electricity. However, shaft generators only operate when the ship is moving. Cruise ships may have four to six medium-speed (500 rpm) engines producing 8-10MW each. The boiler produced steam which created pressure in a pressurized system. We’ll cover some of the most popular technologies used by cruise ships.
Why doesn’t the hull of a cruise ship rust?
When the sound wave reaches the sea floor, it gets reflected and then returns to the receiver of the log. Due to the movement of the ship relative to the seabed, a Doppler effect occurs and is evaluated by the device. As long as the sound waves can reach the bottom of the sea and return to the receiver, the Doppler log measures the distance travelled over ground. However, if it is no longer possible to use the seabed as a reference, the device uses particles suspended in the water, such as plankton and minerals, to measure travel through the water. The heat from the engines is removed by a series of heat exchangers. This is found on the exhaust path proceeding the turbocharger on the way to the scrubber.
RADIANCE OF THE SEAS
For the most part, cruise ships will not offer tours of the hull. The access to this segment of the ship needs to be carefully regulated to maintain the safety of the individual passengers and the entire ship. In simple terms, allowing passengers to explore the ship’s hull would be too dangerous, even if they were supervised by authorized crew members. In May 2015, Wartsila Corporation and Carnival Corporation partnered to optimize cruise ship engine room operations of all 101 ships across the corporation's 9 brands. The deal was signed by Micky Arison (Carnival's Chairman) and Bjorn Rosengren (Wartsila's President and CEO).
What are Cabins Near the Engine Room Like?
You may hear the crew as they go back and forth to the engine room throughout the day and night. Cabins near the cruise ship engine room aren’t noisy enough to cause annoyance or sleeping issues. But if you’re a light sleeper, accommodations near the engine room are among the worst cabins on a cruise ship.
Those who support the cruise industry point out that cruising has never been more popular. A solution is to have docked vessels plug into the port's shore power grid. Most of the world's largest cruise ports have such dockside electrical hookups, reducing bad emissions by up to 95%. The LNG cruise ship concept was first introduced by Wartsila (Finnish manufacturing company) and is based on drive shaft propulsion instead of azipods. The LNG tanks' location is in the upper deck area (right below the funnels). Promas propulsion integrates propeller, hubcap, rudder bulb and the rudder into a single unit which can increase propulsion's efficiency by 3-8% (1-screw vessels) and by 2-6% (2-screw vessels).
Cruise Ship Facilities for Passengers
Whether you desire adventure, luxury, or exploration, High Seas Cruising is your compass to unforgettable cruise vacations. You may feel the engine’s vibration if your cabin is on the lower decks, near the aft. On most ships, the noise isn’t enough to cause any annoyance or trouble sleeping. The engines work the same as a traditional diesel engine, but rather than connecting to the propeller shaft – diesel-electric engines connect directly to large generators.
Passengers can immerse themselves in various activities and events tailored to their interests, ensuring an unforgettable vacation experience. As you venture into the engine room, you’ll encounter a myriad of equipment that powers the ship. From massive engines and generators to fuel storage areas and control panels, you’ll gain a new appreciation for the intricacy and scale of the machinery that keeps the vessel afloat. The engine room itself may have restricted access areas, mainly due to safety considerations or the presence of sensitive equipment.
The first company that fitted cruise vessels with gas turbines, was Royal Caribbean. Gas turbines are greener than diesel engines and allow ships to sail with reduced inventory and smaller maintenance crew. Gas turbines drive generators which in turn provide electricity to propeller motors. They recover heat from gas turbines' exhaust, which then is used to produce the electricity needed for onboard services (air conditioning, water heating).
However, thanks to proper insulation methods, they don’t appear to be that loud. Onboard workshops are also a fantastic way to explore new areas of interest and develop new skills. From cooking classes to photography workshops, these interactive sessions offer passengers the chance to learn from professionals and engage in creative endeavors. Before embarking on the tour, a safety briefing is usually conducted to ensure that visitors are aware of any potential risks and how to navigate the environment safely.
An intelligent autopilot tracks changes in the behavior of the ship through navigational sensors. If the ship drifts off its course due to strong winds, for example, the system automatically responds to correct the change by sending signals straight to the engine room. Once the signal is received by the engines, the rudder or thrusters of the ship are activated and move to the position given by the system. The displays on the bridge show both the angle of the rudder or thrusters, as well as the rate and the radius of the maneuver in progress.
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