| 摘要 |
PURPOSE:To eliminate the need for tracking the sun by a structure wherein a plurality of heat transfer medium passages are provided parallel to the focal line of a linear Fresnel lens within the range of travel of its focal line and the same side ends of the passages are connected with common passages respectively so as to cause the natural convection of heat transfer medium from the passages, on which the insolation is focused, to another passages. CONSTITUTION:As for direct rays of the sun, some two or three pipes of metal pipes 2 are struck by the insolation and the heat transfer medium within said pipes is heated and flowed in a heat exchanger 6, in which said medium decreases its temperature and flows down in the metal pipes 2, which receive no insolation, due to the siphon action of natural convection so as to circulate through a lower connecting pipe 8. Because of the above-mentioned structure that a plurality of the heat transfer medium passages are provided within the range of travel of the focal line of the linear Fresnel lens 1 so as to let the rays of the sun directly hit some of the passages, the need for tracking the sun can be eliminated. |
