| 摘要 |
PURPOSE:To improve thermal efficiency by a method wherein heat conducting tubes, having fins on inner circumferential surfaces thereof and being filled with a heat accumulating substance changeable in phases thereof, are arranged in a cylindrical main frame. CONSTITUTION:Heat conducting tubes 5, orthogonal to a direction of fluid stream, are arranged in a cylindrical main frame 1, flowing heating fluid and heated fluid alternatively, and fins 6 are protruded on inner circumferential surfaces of the heat conducting tubes 5, further, a heat accumulating substance 4 (NaSO4,.10H2O or the like), changeable in phases thereof, is filled in the heat conducting tubes 5. Upon heating the heated fluid, even if the phase of the heat accumulating substance, contacting with the inner circumferential surfaces of the heat conducting tubes 5, is changed into a solid phase 4a, a liquid phase 4b at inner side thereof conducts the heat by means of fins 6. |
