Mercedes Mullins
The Queen Mary 2 is a British ocean liner that has served as the flagship of the Cunard Line since 2004 and is currently the world's biggest ocean liner. It is also one of the world's largest passenger ships and is specifically designed for regular Transatlantic crossings between Southampton and New York City. On a 7-day transatlantic crossing, the Queen Mary 2 consumes 1850 tons of diesel oil and 1000 tons of fuel for its gas turbines.
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What You'll Learn
The Queen Mary 2's fuel consumption for a Transatlantic crossing
The Queen Mary 2 is a British ocean liner that has served as the flagship of the Cunard Line since April 2004. It is the only active, purpose-built ocean liner still in service. The ship is the biggest, most sophisticated ocean liner ever to set sail, with the most sophisticated marine technology in the world. It is also one of the world's largest passenger ships.
Queen Mary 2 sails regular transatlantic crossings between Southampton and New York City, in addition to short cruises and an annual world voyage. The ship is designed specifically for Transatlantic crossings and is supplied with about 65,000 fresh eggs and about 150 tons of food for these crossings.
The Queen Mary 2's power plant comprises four sixteen-cylinder Wärtsilä 16V46CR EnviroEngine marine diesel engines, which are located in a double bottom. The engines generate a combined 67,200 kW (90,100 hp) at 514 rpm. In addition, the power plant also has two General Electric LM2500+ gas turbines, providing a further 50,000 kW (67,000 hp). The gas turbines are housed in a soundproofed enclosure directly beneath the funnel.
For a Transatlantic crossing, the Queen Mary 2's fuel consumption is 1850 tons of diesel oil, plus another 1000 tons of fuel for the ship's gas turbine. The ship's huge fuel tanks can be filled in just 6 hours. The power plant generates 118 million Watts of power – enough electricity to light up a city of 200,000.
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The ship's power plant and fuel economy
The Queen Mary 2 is a British ocean liner that has served as the flagship of the Cunard Line since April 2004. It is the biggest, most sophisticated ocean liner ever to set sail, with the most sophisticated marine technology in the world. It is also one of the world's largest passenger ships.
The Queen Mary 2's power plant is a marvel of engineering. It comprises four sixteen-cylinder Wärtsilä 16V46CR EnviroEngine marine diesel engines, which are the most popular large cruise ship engines on the market. These engines generate a combined 67,200 kW (90,100 hp) at 514 rpm. In addition, there are two General Electric LM2500+ gas turbines that provide a further 50,000 kW (67,000 hp). These drive electric generators, which power four 21,500 kW (28,800 hp) Alstom electrical motors located inside the podded propulsors. This arrangement, known as integrated electric propulsion (IEP), provides economical cruising at low speeds while also allowing for much higher speeds when required.
The Queen Mary 2's fuel economy is impressive, given its size and power. For a regular 7-day North Atlantic crossing between the USA and the UK, the ship needs 1850 tons of diesel oil and 1000 tons of fuel for the gas turbines. This amounts to a fuel economy of approximately 125 feet per gallon, which is 250 times better than a common misconception of 6 inches per gallon. The ship's bulbous bow design helps to increase fuel efficiency by reducing drag.
The Queen Mary 2 is a floating self-sufficient city, with an array of amenities and entertainment options for its passengers. These include fifteen restaurants and bars, five swimming pools, a casino, a ballroom, a theatre, and the first planetarium at sea. The ship also boasts the largest library at sea, with over 8000 volumes. To support all of these operations and amenities, the Queen Mary 2's power plant generates 118 million Watts of power – enough electricity to light up a city of 200,000.
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Diesel engines and gas turbines
The Queen Mary 2 is a British ocean liner that has served as the flagship of the Cunard Line since April 2004. It is the only active, purpose-built ocean liner still in service. The ship is powered by four Wärtsilä 16V46CR EnviroEngine marine diesel engines, which are the most popular large cruise ship engines on the market. These engines generate a combined 67,200 kW (90,100 hp) at 514 rpm.
Each of the four diesel engines weighs 217 tons and is located in a separate engine room deep in the hull. They are supplemented by two General Electric LM2500+ gas turbines, which provide an additional 50,000 kW (67,000 hp). These gas turbines are located in a soundproofed enclosure directly beneath the funnel, rather than in the engine room with the diesel engines.
The diesel engines and gas turbines drive electric generators, which provide power to the ship's four 21,500 kW (28,800 hp) Alstom electrical motors located inside the podded propulsors. This arrangement, known as integrated electric propulsion (IEP), allows the ship to cruise economically at low speeds while also being able to sustain much higher speeds when needed.
The Queen Mary 2's power plant, which combines diesel and gas turbine technologies, is known as a CODEG ("Combined Diesel Electric and Gas Turbine") system. This advanced propulsion system enables the ship to cross the North Atlantic in just six days. The ship's fuel consumption for a regular seven-day North Atlantic crossing is 1850 tons of diesel oil and 1000 tons of fuel for the gas turbines.
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Environmental impact and emissions
The Queen Mary 2 is a British ocean liner that has served as the flagship of the Cunard Line since 2004. It is the biggest and most sophisticated ocean liner ever to set sail, with the most sophisticated marine technology in the world. It is also one of the world's largest passenger ships. The ship is powered by four Wärtsilä diesel engines, which are the most popular large cruise ship engines on the market. These engines are supplemented by two gas turbines made by General Electric. The power plant generates 118 million watts of power, which is enough to light up a city of 200,000.
The environmental impact of the Queen Mary 2 is a significant concern. The ship's high fuel consumption contributes to air pollution and greenhouse gas emissions. For a transatlantic crossing, the ship consumes 1,850 tons of diesel oil and 1,000 tons of fuel for the gas turbines. This results in the emission of various pollutants, including nitrogen oxides (NOx), sulfur oxides (SOx), and particulate matter. While the exact emission rates are not publicly available, it is estimated that large cruise ships emit approximately 0.15% of global sulfur oxide emissions and 2% of global nitrogen oxide emissions. In addition, the ship's diesel engines and gas turbines contribute to climate change by emitting carbon dioxide (CO2) and other greenhouse gases.
To mitigate the environmental impact, Queen Mary 2 is equipped with state-of-the-art "EnviroEngines," which are designed to reduce emissions. These engines comply with NOx emission regulations and do not produce visible smoke. Additionally, the ship's operators have implemented measures to reduce waste and increase energy efficiency. For example, the ship generates its own fresh water through distillation, reducing the need for water transportation and storage. Queen Mary 2 also practices proper waste management, separating and incinerating garbage at high temperatures.
Despite these efforts, the ship's environmental impact remains significant. The high fuel consumption and associated emissions contribute to air pollution and climate change. With an estimated fuel consumption of 65,000 tons per year, the ship's carbon footprint is substantial. Additionally, the disposal of incinerated waste and the release of treated wastewater into the ocean can have further environmental consequences.
Overall, the Queen Mary 2's environmental impact and emissions are a cause for concern. While the ship has implemented measures to reduce its impact, the high fuel consumption and associated emissions present ongoing challenges. Further improvements in engine technology, fuel efficiency, and waste management practices may help to mitigate the environmental impact of this large and sophisticated ocean liner.
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Fuel costs and profit
The Queen Mary 2 is a British ocean liner that has served as the flagship of the Cunard Line since April 2004. It is the only active, purpose-built ocean liner still in service. The ship is powered by four Wärtsilä diesel engines, which are supplemented by two gas turbines made by General Electric. This powerplant generates 118 million watts of power, or 67,200 kW, which is enough to light up a city of 200,000 people.
For a regular 7-day North Atlantic crossing between the USA and the UK, the Queen Mary 2 consumes 1,850 tons of diesel oil and 1,000 tons of fuel for the gas turbines. This fuel consumption is impressive, especially considering that the ship can produce up to 2 million liters of fresh water daily through desalination and that it generates approximately $60,000 in profit every hour.
The cost of fuel for the Queen Mary 2 can vary depending on fuel prices, which can fluctuate. For example, marine gas oil prices in the United States fluctuated between around $500 and $800 per ton between January 2022 and July 2023. Assuming an average marine gas oil price of $650 per ton, the fuel cost for the Queen Mary 2's 7-day North Atlantic crossing would be approximately $2,275,000 (1,850 tons of diesel oil x $650) + $650,000 (1,000 tons of fuel for gas turbines x $650) = $2,925,000.
However, it is important to note that the above calculation assumes a constant fuel price, which may not be the case in reality due to fluctuations in fuel prices over time. Additionally, the calculation does not account for potential discounts or surcharges that may be applied to bulk fuel purchases.
In terms of profit, the Queen Mary 2 generates significant revenue. As mentioned earlier, the ship makes approximately $60,000 in profit every hour. This amounts to a substantial sum over the course of a year, contributing to the overall profitability of the ship's operations.
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Frequently asked questions
For a Transatlantic crossing, the Queen Mary 2 uses 1850 tons of diesel oil and 1000 tons of fuel for the ship's gas turbine.
It takes 6 hours to fill the ship's huge fuel tanks.
The Queen Mary 2 makes $60,000 per hour.
The Queen Mary 2's power plant generates 118 million watts of power.
On a 7-day cruise, the Queen Mary 2 consumes 65,000 eggs, 4,000 bottles of wine, 2 tonnes of potatoes, 26,000 tea bags, 230,000 bottles of wine, and 1.5 million drinks.
