Wind power Q&A

　The "Mizuho Wharf" where Hama Wing is built is not open to the general public. Therefore, in order to go to the foot of Hama Wing and observe up close, it is necessary to participate in tours etc.
For more information, please refer to the following link.

　We recommend "Rinko Park (Seaside Park)" located in Minato Mirai 21 district. In addition, near the Pacifico-yokohama National University Hall in Rinko Park (Seaside Park), there is an "enlightenment sign" with explanations about Hama Wing, so you can see the Hama Wing over the sea.
　It can also be seen clearly from the rooftop floor of Osanbashi (Yokohama International Passenger Terminal).

　Wind power plants are operated automatically to generate electricity efficiently, and are controlled so that they face the wind. Therefore, you can see the current wind direction of Yokohama Port in the direction of Hama Wing. By the way, when facing Minato Mirai, it is the southwest wind, and when facing Bay Bridge, it is southeast wind.

　Once a month, the wind power plant is shut down for regular maintenance. Therefore, it may be stopped even when the wind is blowing.

　In addition to the electricity required for maintenance, we are making efforts to supply businesses in the city that have signed a 100% renewable energy electricity from retail electricity companies. For more information, please see "Summary of Yokohama Wind Power Generation Project".

　On average, it generates 2.1 million kilowatt hours a year. This power generation is equivalent to about 500 households' annual power consumption.

　The blades (blades) of the wind power plant turn fast as the wind becomes stronger, and the tip may be as fast as the Shinkansen.
　The wind speed starts to rotate slowly at about 2 meters per second, starts power generation at a wind speed of about 4 meters per second, and when the wind speed exceeds 25 meters per second, it automatically stops power generation (rotation of blades) for safety. The adjustment of the rotation speed adjusts the amount of wind by changing the angle of the blade (blade).

　It is manufactured by Vestas, Denmark.
　In September 2005, we conducted an open call for participants to select wind power generation facilities for this project, and received proposals from five companies. These proposals were reviewed by the Yokohama City Wind Power Generation Facility Evaluation Committee, consisting of outside experts with a high level of expertise in wind power generation, and the Yokohama City Wind Power Generation Facility Selection Committee established in Environmental Planning Bureau.

　Hamawing is manufactured by Bestas in Denmark, but since there is a steel frame factory designated by the manufacturer in Korea and Bestas' blade factory in China, the Nacel (generator part) is Denmark, the tower (pillar) is in Korea, and blades (feathers) are manufactured in China and transported by boat.
　It was unloaded (drained) at Suzushige Wharf of Yokohama Port, transported to the site by trailer, and assembled with a large crane.
　For the situation at the time of construction, please refer to "Until Hama Wing".

　A metal called a "receptor" is embedded in the blade (feathers), which is used to escape to the ground through the tower (pillar) with a conductor. In addition, the tip of the blade may burst due to the impact of lightning, so that part is prevented by special processing (resin).

　The wind resistance of the wind power plant is 70 meters per second, and the structure of the towers (pillars) and foundations have been confirmed based on the Building Standards Law, and will not fall down due to large-scale earthquakes or typhoons.
　When the wind speed exceeds 25 meters per second, the wind power plant will automatically stop, but if the typhoon approaches and enters a storm area (the area where the average wind speed is 25 meters or more per second is blowing or may blow) , The windmill has been stopped in advance.
　After the Great East Japan Earthquake on March 11, 2011, it was confirmed that there was no damage and resumed operation about 48 hours later.