| 摘要 |
PURPOSE:To contrive effective use of solar heat by improving, moreover, heat collecting efficiency of a solar heat collector without applying an additional device to the solar heat collector, by a method wherein a transparent material such as acrylic resin is applied to a heat collecting pipe, a cross-sectional shape of the wall of the heat collecting pipe is made to possess a function of a lens by making it into a Quonset hut shape, which is made to focus on about an axis of the pipe and a heating pipe is arranged in a coaxial state with the heat collecting pipe. CONSTITUTION:A heat collector 21 consists of a heat collecting pipe 22 provided in a coaxial state with the collector 21 and a heating pipe 23. The heat collecting pipe 22 is made of a transparent material such as acrylic resin, and a cross- sectional shape of a wall of the pipe to be obtained by cutting off the same with a plane including an axis of the pipe consists of a line 22A and an undulated curve 22B which is positioned outside of the line 22A and is formed by continuing circular arcs having a predetermined radius of curvature. The radius of curvature of the circular arc is in size so that the light focuses on an axial position of the pipe when incident light of the sun is made from the outside. |
