| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multitubular heat exchanger which reduces noise and vibration to be caused by air-column resonance without changing current specifications. <P>SOLUTION: The heat exchanger includes: a cylindrical container 13 which is arranged in a vertical axis direction and houses a plurality of tube groups in which a heated fluid flows; a gas introducing means 15 and a gas discharging means 16 which are arranged on an upper side and a lower side of the cylindrical container 13 and introduce and discharge heating medium gas 14 introduced near the tube groups. A plurality of small-diameter holes 31 for inflow of the heating medium gas are arranged around the entire circumference of an upper side wall 13a of the cylindrical container 13, on the inside of an upper gas space belt part 17A on a gas introducing means 15 side. A plurality of small-diameter holes 31 for discharging the heating medium gas 14 are arranged around the entire circumference of a lower side wall 13b of the cylindrical container 13 on the inside of a lower gas space belt part 17B on a gas discharging means 16 side. <P>COPYRIGHT: (C)2013,JPO&INPIT |
