| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve heat transfer performance in a coolant side in a straight type tube for a heat exchanger. Ž<P>SOLUTION: The straight type tube for a heat exchanger is equipped with a resistance distribution forming means for forming resistance distribution of internal fluid in an internal fluid passage part 22 so as to change in a tube longitudinal direction. By this, since a flow in a tube width direction is generated in a coolant flow in the internal fluid passage part 22, the heat transfer performance of an internal fluid side can be improved. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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