| 摘要 |
PURPOSE:To improve a heat collecting efficiency and reduce the number of employed heat collecting tube by a method wherein reflecting plates, having a parabolic recessed sections, are provided between each vacuum tube type heat collecting tubes so as to locate the focal points thereof at substantially central parts of the heat collecting plates. CONSTITUTION:The solar heat collector 11 is equipped with a vacuum tube type heat collecting tube 15 consisting of a transparent glass tube 12 whose interior is kept in a vacuum condition and the heat collecting plates 14, provided in the glass tube and contacting with a heat medium tube 13 consisting of two pieces of copper pipes. The heat collecting tubes 15 are arranged in parallel on a roof member 16 with a predetermined interval while the reflecting plates 17 made of aluminum and having the parabolic recessed sections are provided between the heat collecting tubes 15. In this case, the heat collecting plates 14 are attached with an angle of inclination of about 35 deg. with respect to the horizontal line and are constituted so as to locate the focal points of the parabola of respective neighboring reflecting plates 17 at the central parts thereof. The intervals between the heat collecting tubes 15 are set within 1/3-4/3 of the diameters of the tubes 15. |
