| 摘要 |
PURPOSE:To obtain a piping tube for which any auxiliary facilities such as expansion tank, etc. are not needed by making a tube of a material composed of EPT through extrusion and using it for a heat release piping. CONSTITUTION:A material composed of EPT is formed through extrusion into a tube and the tube is used for centralized heat release pipes 1, 1a, etc. When heat is released from the centralized heat release pipes 1, 1a, etc. after the top surface of roofs 10 and 10a is covered with some snow, heat for melting the snow is prevented from being released into the atmosphere by fallen snow, the centralized heat release pipes 1, 1a, etc. is expanded in diameter through expanding action of the centralized heat release pipes 1, 1a, etc. according to the expansion of the heated heating medium to be circulated through the piping to increase their heat release area, and more effective snow melting can be made through the increase in the amount of heat releasing and adiabatic action of the fallen snow. The amount of heat releasing can be increased or decreased by adjusting the flow of the heating medium and it is not necessary to raise the heating temperature of the heating medium to the capacity limit of the boiler 7 by the boiler 7. Thus, the piping tube can be used forever. |
