| 摘要 |
PURPOSE:To prevent occurrance of a galvanic corrosion phenomenon in which a heat exchanger does not make contact with different kinds of metale of a support frame and which occurs on the contact surface between metale of different potentials by supporting the heat exchanger in a non-contact state on cooling tower support frames through spacers having an electric insulative property. CONSTITUTION:A hermetically closed cooling tower A is a D/A type cooling tower. A hermetically closed type heat exchanger B is installed on the lower side of an upper water tank 21 but on the upper side of a lower water tank 22. This heat exchanger B formed into a rectangular parallelepiped in its enitrety is supported on support frames D fixed on right and left sides of an external air intake port 23 of the cooling tower A through electric insulative spacess C made of a vinyl chloride resin, for example, in a non-contact manner with the support frame D. The heat exchanger B is made of heat exchange cooling function which is the fundament func tion thereof. Each of heat exchange coils 30 comprises a plurality of mutually parallel straight pipes 31 and a plurality of U-shaped curved pipes 32 forming a passage for a liquid to be cooled which meanders in a zigzag shape. Accordingly, at joint parts of straight pipes 31 of the heat-exchange coils and the curved pipes 32, no galvanic corrosion phenomenon occurs. |
