Mercedes Mullins
The fuel consumption of the Oasis system varies depending on the specific application. For example, the cruise ship MS Oasis of the Seas has a fuel efficiency of 437 gallons per mile or 12 feet per gallon. On the other hand, when heating a coach with the Oasis system, diesel consumption is estimated at half a gallon per hour of continuous run. Additionally, in an RVForums thread, a user reported burning approximately 3 gallons of diesel per day while heating their coach with the Oasis system.
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What You'll Learn
The cruise ship MS Oasis of the Seas gets a gas mileage of 437 gallons per mile
The cruise ship MS Oasis of the Seas is a gas guzzler, burning through 437 gallons of fuel per mile. This works out to just 12 feet per gallon.
The Oasis of the Seas is a huge cruise ship, the first of its class, and was the largest in the world when it was completed in 2009. It has a gross tonnage of 225,282 and can carry over 5,400 passengers (some sources state over 6,000). It features a host of attractions, including a zip line, an ice-skating rink, a surf simulator, an aquatic amphitheater, a moving bar, a casino, a miniature golf course, and multiple night clubs.
The ship's power comes from six medium-speed, marine-diesel generating sets. These are made up of three 16-cylinder Wärtsilä 16V46D common rail engines, each producing 18,860 kilowatts (25,290 hp), and three 12-cylinder Wärtsilä 12V46D engines, each producing 13,860 kilowatts (18,590 hp). The total output is 97,020 kilowatts (130,110 hp). This is converted to electricity, which is used for hotel power, propulsion, and all of the other systems used on the ship.
The fuel consumption of the main engines at full power is 1,377 US gallons (5,210 liters) of fuel oil per engine per hour for the 16-cylinder engines and 1,033 US gallons (3,910 liters) per engine per hour for the 12-cylinder engines. This means that the engines are extremely fuel-inefficient, and the ship gets very poor gas mileage.
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The Oasis system uses diesel fuel
The ship is powered by six medium-speed, marine-diesel generating sets, with three 16-cylinder Wärtsilä 16V46D common rail engines and three 12-cylinder Wärtsilä 12V46D engines. The total output of these engines is more than 96 MW, and the power is converted to electricity for use in hotel power, propulsion, and all other systems on the ship.
The fuel consumption of the main engines at full power is 1,377 gallons of fuel oil per hour for the 16-cylinder engines and 1,033 gallons per hour for the 12-cylinder engines. The diesel burner runs for a total of around 4-6 hours in a 24-hour period, and cycles every 1-2 hours, running for less than 5 minutes at a time. This short cycling helps to reduce overall costs.
Oasis of the Seas was the first of the Oasis-class ships, which are the largest passenger ships in the world, carrying over 5,400 passengers. The ship features extensive entertainment and leisure facilities, including a zip line, an ice-skating rink, a surf simulator, an aquatic amphitheater, a moving bar, a casino, a miniature golf course, and much more.
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$130.08
Diesel burner runs a total of 4-6 hours in a 24-hour period
The diesel burner in an Oasis system is estimated to run for a total of 4-6 hours in a 24-hour period. This estimate is based on the assumption that the burner cycles on and off for short periods and is highly effective. The actual runtime may vary depending on various factors, such as outdoor temperature, usage patterns, and system settings.
To calculate the exact fuel consumption of the diesel burner, it is essential to determine the burner's fuel consumption rate and the number of hours it runs per day. Residential oil burners typically consume between 0.8 and 1.7 gallons of oil per hour. At a colder temperature of 35° Fahrenheit, the rate increases to approximately 4.5 gallons per hour.
In one case, an Oasis system user reported burning through 30 gallons of diesel in 10 days, resulting in an average daily consumption of 3 gallons. This usage rate is considered reasonable, given the freezing temperatures during that period.
To optimise fuel efficiency, some Oasis system users choose to leave the AC Heat switch on. This allows the pumps in the distribution box to run when the transfer fluid is up to temperature, providing hot water and cabin heat while driving or upon arrival. By using the AC Heat as the primary heat source, the diesel burner is only required for supplemental heat, resulting in reduced fuel consumption.
It is worth noting that the fuel gauge on an Oasis system may not always represent the volume in a linear manner. The gauge may indicate the height of the fuel, and due to the shape of the tank, the first quarter of the gauge may represent a much smaller volume. Therefore, it is essential to monitor fuel levels regularly and consider technological solutions offered by energy companies that automate tracking and refilling.
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The Oasis system can be supplemented with electric heat
The Oasis system, as used in RVs, can be supplemented with electric heat. This is a quiet and cost-effective way to heat your RV, which doesn't burn fuel or affect the maintenance interval. The AC Heat switch can be left on so that, when plugged in, the diesel burner only needs to be used as a supplement when extra heat is required. This also means you will have access to hot water and cabin heat while driving.
The Oasis system is also used on cruise ships, specifically the Royal Caribbean International cruise line. The Oasis-class ships are the largest in the world, carrying over 5,400 passengers. The fuel consumption of these ships is high, at 437 gallons per mile, or 12 feet per gallon. This works out at 14.40 mpg per passenger, or 19.36 mpg per person including crew, when the ship is fully occupied.
The power on these ships comes from six medium-speed, marine-diesel generating sets. The diesel engines produce between 13,860 and 18,860 kilowatts of energy each, with a total output of 97,020 kilowatts. This is converted to electricity, which is used for hotel power, propulsion, and all other systems on the ship.
While the Oasis system on cruise ships does not currently use electric heat, it is possible that future ships will be more environmentally sound. LNG (liquefied natural gas)-fuelled engines could be used, which would reduce emissions.
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The Oasis of the Seas is powered by Wärtsilä engines
The Oasis of the Seas is a cruise ship operated by Royal Caribbean International. It is the first of its class, the Oasis class, whose ships were the largest passenger ships in the world until they were surpassed by the Icon class in 2023. The Oasis of the Seas set a new capacity record of carrying over 6,000 passengers when it was constructed. The ship features a wide range of amenities, including a zip line, an ice-skating rink, a surf simulator, an aquatic amphitheatre, a casino, and multiple night clubs.
The total power output of these engines is 97,020 kW (130,110 hp), which is converted to electricity for use in hotel power, such as lighting and elevators. This electricity usage is in addition to the fuel consumption required for propulsion. While the Oasis of the Seas is an impressive vessel, its fuel efficiency has been criticised, with a gas mileage of 437 gallons per mile (gpm) or 12 feet per gallon. This figure is much lower than that of cars and even fully loaded airplanes.
The Oasis of the Seas has a gross tonnage of 225,282 and a displacement of approximately 100,000 metric tons. Its wide hull design provides stability and good performance, even in challenging weather conditions. The ship's length was initially surpassed by its sister ship, Allure of the Seas, by a small margin, and subsequent Oasis-class vessels have also slightly exceeded its size. However, the Oasis of the Seas remains one of the world's largest passenger ships.
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Frequently asked questions
The fuel consumption of the main engines of the Oasis of the Seas cruise ship at full power is 1,377 US gallons of fuel oil per engine per hour for the 16-cylinder engines and 1,033 US gallons per engine per hour for the 12-cylinder engines.
The Oasis of the Seas cruise ship gets a gas mileage of 437 gallons per mile, or 12 feet per gallon.
The gas mileage of the Oasis of the Seas cruise ship seems very low compared to cars. However, it carries far more people than a car, and when fully occupied, it gets 14.40 miles per gallon of fuel per passenger.
The Oasis of the Seas cruise ship is powered by diesel fuel.
One user reported using about 3 gallons of diesel fuel per day to heat their RV with the Oasis system. Another user estimated that the diesel burner runs a total of 4-6 hours in a 24-hour period.
