Katerina Swanson
Destroyers are naval warships that consume a large amount of fuel. For example, the Arleigh Burke-class destroyer burns a minimum of 1,000 gallons of petroleum fuel per hour. The amount of fuel a destroyer carries depends on several factors, including the ship's size, engine capacity, and speed. Destroyers are typically equipped with powerful engines that are most efficient at high speeds, and their fuel consumption can be significantly influenced by their speed. The U.S. Navy has been working on alternative fuel sources, such as using seawater to power ships, to reduce the need for frequent refuelling and improve operational efficiency.
| Characteristics | Values |
|---|---|
| Fuel consumption per hour | 1,000 gallons |
| Fuel consumption per minute | 16.67 gallons |
| Fuel consumption per second | 0.28 gallons |
| Type of fuel | Petroleum |
| Type of engines | Four gas turbine propulsion engines |
| Engine efficiency | Most efficient at high RPMs |
| Engine efficiency at lower speeds | Requires one engine going full tilt |
| Engine upgrade | Hybrid-electric drive (HED) to lower fuel costs |
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What You'll Learn
- Arleigh Burke-class destroyers burn 1,000 gallons of fuel per hour
- Fuel consumption is influenced by speed
- The US Navy is developing technology to use seawater as fuel
- The US Navy is developing a new class of destroyers called Future Surface Combatant
- Destroyers can carry RIM-162 Evolved SeaSparrow Missiles (ESSMs)
Arleigh Burke-class destroyers burn 1,000 gallons of fuel per hour
The Arleigh Burke-class destroyers are United States Navy destroyers named after Arleigh Burke, an American destroyer admiral during World War II. These warships are multi-mission destroyers capable of conducting anti-aircraft warfare, tactical land strikes, anti-submarine warfare, and anti-surface warfare. They are large, with an overall length of 505 to 509.5 feet (153.9 to 155.3 meters) and a displacement ranging from 8,300 to 9,700 tons. They are also heavily armed, carrying over 90 missiles.
The Arleigh Burke-class destroyers are fitted with four gas turbine propulsion engines, which are most efficient at high RPMs. Depending on the speed required, it may be more efficient to run one engine at full capacity rather than splitting the work across two engines. These warships burn a minimum of about 1,000 gallons of fuel per hour, or 24 barrels, though this figure can vary widely depending on numerous factors and variables. For example, wind and current can have a major effect on a ship's efficiency, as can speed. When a ship moves at a higher speed, it takes much more effort to push it through the water because of the larger waves.
The U.S. Navy has explored various methods to improve the fuel efficiency of its destroyers. In 2016, the Navy announced plans to outfit 34 Flight IIA Arleigh Burkes with a hybrid-electric drive (HED) system to reduce fuel costs. The HED system would use an electric motor to propel the ship at speeds under 13 knots, such as during BMD or maritime security operations. By using the HED system for half of the time, the time between refuelings could be extended by 2.5 days.
Additionally, researchers at the U.S. Naval Research Laboratory have proven that it is possible to power ships using a cheap and convenient supply of fuel created from seawater. This technology utilizes a specialized catalytic converter to transform carbon dioxide and hydrogen from seawater into a liquid hydrocarbon fuel. If implemented, this innovation could potentially allow Navy ships to remain operational at all times, eliminating the need for frequent and challenging mid-sea fuel-ups with tankers.
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Fuel consumption is influenced by speed
The fuel consumption of a destroyer is influenced by several factors, one of which is speed. A destroyer's speed is determined by the number of gas turbine (GT) engines in use, with faster speeds requiring more engines. For example, Trail Shaft configuration has only one GT engine online, limiting the speed to 23 knots. At Split Plant, one GT engine on each of the two shafts is online, allowing a speed of up to 27 knots. To achieve speeds greater than 30 knots, all GT engines must be online.
The relationship between fuel consumption and speed is complex. While increasing speed may lead to higher fuel consumption per hour, the time spent traveling a given distance decreases. This results in a parabolic relationship between fuel consumption and speed, where the number of hours spent traveling inversely affects fuel efficiency. Therefore, the most fuel-efficient speed for each plant configuration varies, with Trail Shaft being most efficient at 13-14 knots, Split Plant at 15 knots, and Full Power at 17 knots.
The number of GT engines in use also impacts the fuel consumption at different speeds. With two GT engines online, the optimum speed for fuel efficiency increases. For example, at Trail Shaft, the optimum speed rises to 16-17 knots, while at Split Plant, it increases to 17-18 knots. However, the fuel savings at these higher speeds are minimal, at approximately 0.2%.
Additionally, the engine setup of a destroyer can influence fuel consumption at different speeds. Destroyers with gas turbine propulsion engines, such as the Arleigh Burke-class destroyer, are most efficient at high RPMs. In this case, using one engine at full capacity is more efficient than splitting the work across multiple engines. Other factors, such as wind, current, hull design, and propeller roughness, can also impact a destroyer's fuel efficiency at different speeds.
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The US Navy is developing technology to use seawater as fuel
Scientists at the US Naval Research Laboratory have been working on a solution for nearly a decade. They have developed a process to create liquid hydrocarbon fuel from seawater. This involves using a specialised catalytic converter to extract and convert carbon dioxide and hydrogen from seawater into fuel, at a 92% efficiency rate. The resulting fuel can then be used in ships' existing engines.
The feasibility of this approach has been demonstrated in proof-of-concept tests, including one in which researchers flew a model aeroplane using the fuel derived from seawater. The next step is to build the infrastructure to convert seawater into fuel on a massive scale. The Navy predicts that seawater fuel would cost about $3-6 per gallon and could be commercially viable within a decade.
This technology would bring significant advantages to the Navy. It would reduce the need for vulnerable fuel deliveries at sea, increase the operational flexibility and time of its fleet, and help the Navy meet its alternative energy goals. It would also provide a faster and safer refuelling process and reduce the Navy's dependence on finite petroleum supplies.
However, there are some challenges to overcome. One issue is that energy is required to pump the water into the conversion machine, which could make the process pointless if the ship uses fuel to generate the electricity for the conversion. Therefore, the conversion would ideally take place on a nuclear-powered aircraft carrier. There are also questions about the environmental impact of the process, with concerns about the methane produced as a byproduct and the carbon released back into the atmosphere.
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The US Navy is developing a new class of destroyers called Future Surface Combatant
The US Navy is developing a new class of destroyers called the DDG(X) or Future Surface Combatant, which will be the principal large surface combatants of the US Navy. The DDG(X) program is the culmination of the Large Surface Combatant (LSC) initiative, which was embarked upon following the cancellation of CG(X) and the Zumwalt-class destroyer procurement. The new destroyers will succeed 22 Flight II Ticonderoga-class cruisers and 28 Flight I/II Arleigh Burke-class destroyers.
The US Navy awarded a $39.6 million contract to naval architecture firm Gibbs & Cox to support the design and engineering of the new destroyers. The DDG(X) will incorporate the combat system (sensors, radars, weapons, countermeasures, control computers, etc.) of the new Flight III Burke destroyers onto a larger, sleeker hull, which will help simplify supply chains. The hull design will also incorporate lessons and elements from both the Arleigh Burke and Zumwalt designs. The vessels will be able to accommodate larger missile launch systems and have improved survivability, as well as space, weight, power, and cooling margins for future growth.
The DDG(X) will use an Integrated Power System (IPS), a modern integrated turbo-electric drive as employed on the Zumwalt-class destroyers. This will result in a 50% greater range, a 120% greater time on station, and a 25% reduction in fuel burn compared to current US Navy destroyers. The sensors will initially be enlarged variants of the AN/SPY-6 radar mounted on the Flight III Arleigh Burke-class destroyers, with provisions for upgraded sensors in the future, including larger radar arrays. The baseline DDG(X) design is expected to include 96 standard Vertical Launch System (VLS) cells, with the ability to incorporate 12 large missile launch cells in place of 32 of the 96 standard VLS cells.
The development of the DDG(X) is taking a measured approach, with the director of surface warfare stating that the first ships will be bought in the late 2020s after certain technologies mature. This is a shift from previous plans to begin the ship program as early as 2023, as called for by former Chief of Naval Operations Adm. John Richardson, who advocated for a rapid design and fielding process. The Navy has acknowledged that it is outgrowing its Arleigh Burke destroyer design, and the future surface force will rely more heavily on small combatants like frigates and unmanned surface vessels.
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Destroyers can carry RIM-162 Evolved SeaSparrow Missiles (ESSMs)
Destroyers are large, powerful warships that can burn a minimum of about 1,000 gallons of fuel per hour. The exact amount of fuel burned depends on various factors such as wind, current, and speed. For example, at higher speeds, a ship creates bigger waves, requiring more energy to push through the water.
One notable feature of destroyers is their ability to carry RIM-162 Evolved SeaSparrow Missiles (ESSMs). The ESSM is a medium-range, surface-to-air interceptor designed to counter various threats, including high-speed anti-ship cruise missiles, low-velocity air threats such as drones and helicopters, and high-speed manoeuvrable surface threats. The ESSM is an upgraded version of the RIM-7 Sea Sparrow missile, featuring a larger and more powerful rocket motor, improved aerodynamics, and advanced missile guidance technology. This makes it highly effective against supersonic manoeuvring anti-ship missiles.
The ESSM can be quad-packed in the Mark 41 Vertical Launch System, and each canister of the Mk 48 VLS can house either a single RIM-7VL (Vertically Launched) Sea Sparrow cell or two RIM-162 ESSM cells. The ESSM works in conjunction with other air defence interceptors, such as the Standard Missile-2 and Standard Missile-6, to provide naval vessels with a robust layered defence.
The ESSM's capabilities were demonstrated in a combat situation for the first time when it successfully intercepted a target drone using its active guidance seeker-head during a live-fire test in 2018. This marked a significant milestone in the evolution of naval air defences, showcasing the ESSM's ability to effectively counter modern air and missile threats.
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Frequently asked questions
The amount of fuel carried by a destroyer ship depends on its size and engine capacity. For example, the CMA CGM Benjamin Franklin, one of the largest container ships, can carry approximately 4.5 million gallons of fuel. On the other hand, Panamax ships can carry 1.5-2 million gallons, while Post-Panamax ships carry 2.5-3.5 million gallons.
An Arleigh Burke-class destroyer burns a minimum of 24 barrels (1,000 gallons) of fuel per hour. However, this figure can vary due to factors such as wind, current, and speed.
Destroyer ships need to refuel frequently, and the U.S. Navy is working on using seawater to power ships to avoid interruptions during missions.
