On the 9th, CNOOC announced that Asia's first set of marine wind turbine booster system independently developed and manufactured by China was officially put into use, which not only marks China's zero breakthrough in commercial ship rotor sails, but also brings positive demonstration significance to promoting the green and low-carbon development of the ship transportation industry.
China's ship power technology has made a breakthrough.
These two large cylinders installed on the ship are the rotor sail system. It has a height of 18 meters, a diameter of 4 meters, and a single weight of 40 tons. This big guy can make up to 200 revolutions per minute, and it works even at minus 25 degrees Celsius.
Wu Liguo, Captain of Offshore Oil 226 Ship: The project team carried out in-depth simulation analysis of the ship's application environment and energy consumption in the early stage of design, and through the installation of a rotor sail system, it can save an average of 12% of fuel per year, reduce carbon dioxide emissions by about 412 tons, and realize the benefits of the whole life cycle.
The captain told reporters that when the wind speed and direction are right, the cylindrical sail will automatically open, and the electric motor will drive the sail to rotate, providing auxiliary power for the ship to move forward. Don't underestimate this sail, with it, large engineering vessels can save up to 5% to 25% of fuel on average. It can also be installed on oil tankers, passenger ships, bulk carriers, ro-ro ships and other ship types with open deck surfaces.
Yang Yunzhan, project leader of the rotor sail system of CNOOC Engineering: The project pioneered a functional detachable base and an integrated intelligent central control system, which automatically obtains the wind speed and direction of the route, and adjusts the working attitude of the rotor sail to obtain maximum kinetic energy, providing a new model for the green development and intelligent control of the shipbuilding industry.
It is understood that China's coastal routes are very rich in wind resources, and the average wind power of offshore routes reaches level 4, so this cylindrical sail system has broad application prospects. In addition, the rotor sail system has good compatibility with other equipment and fuels, which can further promote the coordinated green development of China's shipbuilding, new energy and other industries.
Rotor sail system Retrofitting ships with "green sails".
Rotor sails first appeared in the 20s of the 20th century, but due to the weight restrictions of the rotor and the advent of diesel engines and steam turbines, the technology was not widely used at that time. In the past two years, the research and practice of this technology at home and abroad have gradually developed and matured. What is a rotor sail system and why do a few cylinders drive a ship forward?Let's find out
The rotor sail system is known as the green "sail", which works on the principle that when a rotating sphere or cylinder moves in the air flow, a pressure difference is formed between the two sides of the sphere or cylinder, and the ball moves towards the low-pressure side.
Generally speaking, the rotary drum sail system uses a motor to drive the rotating drum to rotate, so that the air pressure on the surface of the rotating side of the downwind increases, and the air pressure on the surface of the downwind rotating side decreases, thus generating a thrust perpendicular to the direction of the air flow, improving the power efficiency of the ship, reducing fuel consumption and reducing carbon emissions. Compared with traditional ship sails, it occupies a small deck space, is not greatly affected by bad wind conditions, and has the most obvious effect on lateral winds, and can be installed on oil tankers, passenger ships, bulk carriers, ro-ro ships and other ship types with open deck surfaces. Depending on the size and number of rotor sails installed on a single ship, the average fuel savings can be as high as 5% to 25%.