Aluminum Spiral High Speed Door
The Spiral door offers high-speed operation for high-traffic situations and rigid aluminum slat construction that eliminates the need for a second security door. Crisp lines give the Spiral door a stylish look that's great for many types of commercial, automotive retail, government, institutional and industrial applications. The Spiral is ideal for automotive dealerships, government, parking and security. Benefits No metal-to-metal contact reduces wear on the door panel and offers fast, quiet operation.
Aluminum spiral High Speed doors are usually used wherever goods traffic occurs and where the doors have to fulfill special requirements. In the food and beverage industry, or Medical industry for example, special climatic conditions have to prevail; short opening and closing times reduce cooling loss, avoid airflow and enable a smooth operating procedure. They can also be designed in larger dimensions for the mining and aircraft industries.
Aluminum Spiral High Speed Door,Simple Hard Fast Door,High Speed Spiral Door,Metal Hard Fast Door Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfgaragedoor.com
The University of Hong Kong successfully developed micro wind turbines
This miniature wind turbine, jointly developed by the University of Hong Kong professor and the French inventor, uses a specially designed plastic wheel with a diameter of only 26 cm as a means of obtaining wind energy.
Such rollers can be assembled into any shape and size. It can be installed on the terrace of a home or on the roof of a building. The generated electricity is first stored in the battery and can be used to drive household appliances.
According to the inventor, the wind power system can generate electricity when the wind speed is only two meters per second. The traditional small wind turbines must increase the wind speed to 7 meters per second to generate electricity efficiently. The average wind speed in most cities around the world is 5 meters per second.