| 摘要 |
PURPOSE:To improve the efficiency of the titled collector by providing fins for collecting the heat of external air on the lower surface of heat collecting fins in a direction where heat loss due to natural convection is small, and arranging a transparent cover upward of the heat collecting fins. CONSTITUTION:A solar beam absorbing surface 7 is provided on the upper surface of a heat collecting plate 5, and the heat collecting fins 10 are provided on the lower surface of the plate 5 in a direction where heat loss due to natural convection is small, a transparent cover 2 being provided at the upper part of the heat collecting plate 5. As a result, the solar heat can be absorbed with a small radiation loss and a high heat collecting efficiency on a fine day, and the heat of external air can be absorbed excellently on the lower surface of the heat collecting plate on a cloudy day. |
