| 摘要 |
A system for heating air in an enclosed air duct or wind tunnel which comprises a series of wind producing devices which are powered by conventional electrical power sources and a series of wind collecting devices which collect the previously generated wind to generate electricity which electricity is transmitted to a series of heat exchangers. Additionally, wind collecting apparatuses, e.g., a windmill, are provided outside of the air duct to collect wind on the outside of the air duct to drive a generator which provides additional electricity which is also transmitted to the heat exchanger. The heat producing elements could include fans and/or squirrel cage devices which are driven by electrical power sources. The wind collecting devices could include squirrel cage devices and/or fan devices which are each connected to generators for producing electricity which is then transmitted to the heat exchangers. A system may be comprised of multiple units of each of these devices. Furthermore, the air duct could be straight or it could be curved. While the wind producing devices are driven by conventional electrical power sources, the heat exchangers collect electricity from the wind producing elements which may be unconventional in that the frequency or hertz of the electricity may vary and not be conventional in the sense that it could be different from the common voltage levels and/or frequency, i.e., sixty cycles per second or hertz, which is commonly used in the United States.
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