| 摘要 |
PURPOSE:To obtain a double pipe type heat exchanger whose heat exchange efficiency is high, by filling a space constituted with a space in an inner pipe, the inner pipe and an outer pipe with metallic foamed material. CONSTITUTION:A space A in an inner pipe 1 of a heat exchanger made of a double pipe consisting of the inner and outer pipes 1, 2 and a space B between the inner pipe 1 and the outer pipe 2 are filled densely with a metallic foamed material 3 (foamed metal) such as aluminum. As the foamed metal 3 is spongy and porous it possesses a large surface area. Then if, for example, room-temperature gas is streamed to the space A and high-temperature gas is streamed to the space B, effective heat exchange is possible through the foamed metal 3 and the inner pipe 1, and miniaturization of the heat exchanger itself becomes possible. |
