| 摘要 |
PROBLEM TO BE SOLVED: To supply power necessary for the ventilation and air conditioning by private power generation and to efficiently conduct indoor ventilation and air conditioning. SOLUTION: Solar cells 34 and fans 35 or windmills 36 are rotatably supported on an upper cord 32 of a sawtooth roof 1 by stands 33. The solar cell 34 and the fan 35 or the windmill 36 are supported at positions symmetric to each other with respect to the upper cord 32. One of the solar cell 34 photovoltaic generation) and the fan 35 or the windmill 36 (wind power generation) which has a batter generation efficiency is selected, in accordance with weather conditions and transferred to the position above the upper cord 32. Thus, natural energy such as sunlight, wind, etc., is efficiently applied to the solar cell 34, the fan 35 or the windmill 36 to increase the generated power. |
