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Without a source of power, these huge cruise vessels would be nothing more than drifting aimlessly hotels. Gas turbine engines, as being aero derivative, generate heat which is transformed from mechanical energy in electrical power. Rarely, engines are not placed at the bottom of ship - four main diesel engines on RMS Queen Mary 2, are placed above the keel, and two smaller gas turbines are on top, aft of funnel. An interesting fact is that it was not unusual for older liners to feature two engine rooms. Today's direct-drive diesels feature one main advantage - the option to use shaft generator, which is a device using the circular motion of propeller shaft in order to generate electricity needed for hotel services, like cooking and lighting. Probably you've heard about Carnival cruise ship accidents related to power failures in 2013.
The new cruise ship propulsion systems ABB Azipods XO (photo at the right) are more fuel efficient than the traditional systems, also providing better maneuverability, maximizing speed, reducing bad emissions, which as a whole optimizes the cruise ship's performance and enhances passenger safety. New Azipod propulsion systems have major impact on the cruise ship's operating efficiency, reducing energy consumption and bad emissions by up to 20%. Supply transformer - power produced by generators is 6600 KV, that is stepped down to necessary voltage by supply transformer and is provided to the motor in the pod. Frequency controller - used to change frequency of supplied power so that rotating motor speed can be controlled. However, the steering and propulsion systems in azipod arrangement, are combined into one part and the system consists of propeller (driven by electrical motor) turned by rudder (that is connected to the azipod system).
A lot of space is saved by Azipod cruise ship propulsion system in the engine room - there is no propeller, engine, shafting or other arrangements. Great maneuverability - the propeller can turn in all directions and enables crash maneuvering stop distance that is better than conventional system's.
Azipod cruise ship propulsion system can be placed below ship’s height and provide more efficiency than conventional systems. In case the ships have large breadth, two (or more) azipod systems, independent from one another, can be used to provide subtle maneuvering. Azipod cruise ship propulsion system can't be installed in heavy cargo ships which need large motors and a lot of power. When entering service in 2004, the Cunard's QM2 was the biggest in the world at 150,000 GR tonnes. An interesting fact about cruise ship propulsion is that Norwegian Epic doesn't have pods, though slightly bigger than Queen Mary 2 (at 153,000 GR tonnes), because of NCL concerns about the new technology.
In November 2013, the manufacturing giant Rolls-Royce upgraded the Hurtigruten's cruise ship ms Richard With with its new, more fuel efficient "Promas Lite" propulsion system (integrated propeller-rudder system).
The cruise ship engine power is responsible for driving propellers, and the other possibility is producing electricity that is used subsequently to drive propellers. Cruise industry began in 1844, when ships were propelled by steam engines, performing the driving of propellers by using steam as working fluid. The building of the US first and only merchant nuclear-powered ship was commissioned in the 1950s by President Eisenhower.
Rolls Royce is the manufacturer of the world's largest GAS marine turbine "Rolls-Royce MT30".
The first large vessel to use a new gas-turbine cruise ship propulsion system was Celebrity Millennium.
Gas turbines at this time are only interesting in building of high speed ships (warships, and especially aircraft carriers, or fast passenger vessels - Millennium max speed is 25kn), because of the better diesels' output in lower speed and higher price of gasoil instead of fuel for diesel engines.
Gas turbine cruise ship propulsion systems are able to avoid pre-heating systems needed for fuel in classic installations (risk of fire!), since they use gasoil.
Nearly all contemporary ocean liners and cruise ships are powered by electricity - powering motors that turn propellers.
Speed affects cruise ship fuel consumption, because in order to go faster, they must increase electricity flow to motors. RMS Queen Mary 2 is equipped with exhaust gas economizers, using waste heat from engines to produce steam. Today cruising is one of the most popular vacations, but there are significant environmental downsides. TUI Cruises published company's environmental impact report (first of its kind) including environmental objectives and TUI strategy for 5-years period. Energy efficiencies are the key to reduce fuel consumption, CO2, and other emissions, and contribute to climate protection. Content ratings help you understand the type of content you might find in an app or game, so you can decide if they are suitable for you and your family. If an app or game does not have a rating, it means that it has not yet been rated, or it’s been rated and we’re working to update the page.
Windows Movie Maker 2012 is a free video editor from Microsoft. Windows Movie Maker 2012 is the stand out application of Windows Essentials 2012.

A large number of older ships use diesel reciprocating engines for generating power for propulsion. Cunard QE2, for example, consumes daily 380 tons of fuel when she's traveling at 28.5 knots speed and carries fuel enough to sail for 12 days. Ships' heaviest weights have to be situated at the lowest possible place because of stability, and usually engines are mounted above the keel. On these ships, main engines are not connected to propeller shafts, and instead of it they are directly connected to big generators in order to produce electricity, which is sent in turn to electric motors, that then power and help turn the propellers.
As for smaller machinery (cabin lights, galley equipment), the electricity goes through transformer and is thus stepped down into lower voltage. They are turned off in port, and smaller generators supply "hotel" load (lights, air-conditioning, galley, etc.). Backup generators are located higher up and also outside engine room spaces to isolate them from damage or fire. Conventional marine propulsion systems use two stroke engine connected to shaft, that passes through stern tube and shaft tunnel to connect to the propeller outside hull in aft part of ship.
Her designer Stephen Payne showed the advantages of pod-propulsion giving vessels increased manoeuvrability. Some of the lines including Celebrity and Cunard have suffered breakdowns because of pod-bearing failures.
This is an older ship, and Promas Lite was the perfect choice as it is a combined "propeller-rudder" system increasing the efficiency of older passenger ships with lesser tonnage. Engine's effectiveness depends not only on the design but also the shape, weight and size of the ship. The largest passenger steamship (before hitting an iceberg on April 14, 1912) was the Titanic, powered by both reciprocating engines and turbine, able to generate 50,000 horsepower (37 megawatts).
Of total cost $46.9 million, on the fuel core and nuclear reactor was spent more than $28 million.
Gas turbines are greener than diesel engines and allow ships sailing with reduced inventory and smaller maintenance crew.
Ship's hull, for example, can be applied by silicon coating in order to reduce frictions as the ship goes through water. However, with the more and more ships come, the more and more pollution that is illness-causing. Mein Schiff 3, for example, is expected to feature special energy management systems that help to consume 30% less energy than comparable size ships. So, now that you know how you ship moves, enjoy freely the motion of the ocean, and the motion with the lotion on your always happy cruise vacations! It does not indicate that the app was specifically designed for that particular age, or if a certain level of skill is required to play the game or use the app. This basic video editing tool remains great while offering a few new, useful features. Windows Movie Maker 2012 takes advantage of hardware acceleration, which will speed up video exporting and encoding. We do not encourage or condone the use of this program if it is in violation of these laws. Airplanes, for example, require tremendous speeds of propellers to provide forward motion for flight, but ship propellers don't need to turn so fast and rely on torque power. However, legislation today requires vessels to have equipment duplication and two engine rooms. Main advantage of the diesel-electric cruise ship engine systems is efficiency as they allow main engines to operate near the most efficient speed, no matter if the ship is moving at 5 or 25 knots. Pumps that are driven electrically take in cold water from ocean to cool the engines, and electrical pumps get fuel from fuel tanks and supply it to the engine. The propellers (screws) of the QM2 ship are mounted on the pods which rotate 360 degrees and provide advanced manoeuvrability. Lots of voyages had to be cancelled, extensive dry-docking periods required for pod bearings to be replaced, and NCL didn't want to take the risk. One option is to make them bigger and more effective when manoeuvring, another is to add additional mini-pods or install full-sized pods.
The ship operated only for five years (1965-1970) but due to the high running costs its service was terminated. It's innovative and, besides new activities available, economy of scale, marketing, represents an important element of ship design. Besides the other Millenium class ships ordered in Chantiers de l'Atlantique, Vantage class ships that use similar gas systems are the RCI-Celebrity group at Meyer Werft - the Radiance series. HFO (heavy fuel oil) is used by diesel engines, while MGO (marine gas oil) is used by gas turbine engines. For example, Queen Mary 2 consumes 237 tons MGO and 261 tons HFO a day when at full spreed.
Asthma, cancer, respiratory illness, heart disease, are the results of burned in ports nasty bunker fuel.

Kudos to the guys that invent and build all these technology wonders, and one BIG "thank you" to all the crew that operates them - for us to enjoy our perfect time at sea! There is also a new video stabilization feature, which will be a boon to those with cameras that don't offer this feature. Vessels use lower-grade diesel which tends not to burn as purely as diesel-powered road-going vehicles. Therefore, they travel slowly, and rarely top 30 knots (for more info follow our speed-link above). An area creating enough power for driving such an enormous vessel through water needs to be really big - very often engine rooms occupy at least three decks.
Electrical power is vital for many operational functions - without it, ships come to a halt. They carry power from generators to switchboards, through passageways, public rooms, crew and passenger cabins. Despite that, they don't have the capacity of main generators and engines, don't produce electricity enough to move the ship, and can't supply all the power needed in ports, because of constraints in space.
Ships that use diesel engines are required to carry exhaust-treatment systems and catalytic-reduction equipment to reduce the environmental impact. They recover heat from gas turbines' exhaust, which then is used to produce the electricity needed for onboard services (air conditioning, water heating).
This fact is a turn in the search of lower costs for lines and lower prices for passengers, and as gas-turbine ship propulsion system presents other advantages such as comfort and ecology. The LNG technology also advances due to the IMO's future maritime emissions regulations, especially in ports and while operating in environmentally sensitive destinations. Ships' gas mileage varies depending on type and size of ship, the number of the passengers onboard, and other factors.
After a certain point, the rate of return decreases from adding engines, because if a ship can manage 17 knots by two engines, it doesn't mean that four engines are going to produce 34 knots.
Another experiment is LED lighting, using less energy and producing less heat (thus is reduced the demand for electricity and air conditioning). Modern ships use either diesel electric engines or gas turbines as a source of power for propulsion, and for ship's systems. The same way do diesel-electric engines work, yet they use direct drive system, not a turbine. But rather than long halls stretching length of hulls, machinery is almost always divided into smaller compartments - one might house main engines, and another might contain air-conditioning system. Emergency generators are instead used only for essential navigation systems - crucial communication equipment, critical pumps in engine room, emergency lighting. Royal Caribbean vessels of Oasis, Freedom and Voyager classes have pod-propulsion as many other big ships, which is opposed to the fixed traditional screws which push in one direction only. CBS program said that if ships were powered off-grid, electricity was increasingly renewable, like solar and wind. The video timeline also features a wav form so you can easily see where audio is placed within the video. Overall, Windows Movie Maker 2012 is a great update to an already great video editor.
The UI is user friendly and for a average user it is a great program and one of the best available yet. Some of the larger ships depend on two power sources - one for electrical power and one for propulsion. The output shafts, to produce electrical power, are connected to the electrical generators. If the electrical cables aren't truly redundant, even ships that feature two engine rooms suffer power failure. This not only provides shade for pool area, but the produced by solar panels electricity is used to decrease the electricity demand from ship's engines. In 2012, the TUI company used 54,463t fuel, including 9,732t low sulfur fuel oil, 40,880t heavy fuel oil, and 3,851t marine diesel oil.
24 hours of power are at least provided by battery rooms to smaller emergency equipment list.
This may not seem very good mileage at first glance, however, cruise ships are moving at once thousands of people whereas a car is moving a few.
To analyze the problem with cruise ship fuel consumption closely, it's necessary to consider the way modern ships are being powered.

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