| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve a strength reliability of tube plates at a heat exchanger having several heat transfer tubes fixed to tube plates.SOLUTION: This invention relates to a heat exchanger comprising an inner cylinder 10, several heat transfer tubes 11 arranged inside the inner cylinder 10 in parallel with the inner cylinder 10, and tube plates 8 fixed to the ends of the heat transfer tubes 11 so as to position-set the heat transfer tubes 11 under a prescribed arrangement and provides a heat exchanger in which centers of the heat transfer tubes 11, as seen from a tube axis direction, are arranged in equal spaced apart relation and under a zig-zag formation in a range except an apex A of polygon internally contacted with a circle C of smaller diameter than that of the inner cylinder 10.</p> |
