公开(公告)号：US20080149309A1

公开(公告)日：2008-06-26

申请号：US11884877

申请日：2005-05-11

申请人： Zhi xin Li ,  Ji an Meng ,  Mitsuharu Numata ,  Kazushige Kasai

发明人： Zhi xin Li ,  Ji an Meng ,  Mitsuharu Numata ,  Kazushige Kasai

IPC分类号： F28D15/00 ,  F28F1/14 ,  F16L9/06

CPC分类号： F28F1/42 ,  F28D7/0016 ,  F28F1/426

摘要： The present invention relates to a hot water heat transfer pipe that exchanges heat between its interior and exterior. A plurality of projections, each having a height in the range of 0.8-2.0 mm or 0.1-0.25 times the inner diameter, is provided in at least one part of an inner surface of a portion of the heat transfer pipe positioned in a section where the Reynolds number of the fluid flowing in the interior is less than 7,000 to improve the heat transfer performance in the low Reynolds number zone, and minimize pressure loss inside the pipe.

摘要翻译： 本发明涉及一种在其内部和外部之间交换热量的热水传热管。 在传热管的一部分的内表面的至少一部分中设置有多个突起，每个突起具有在0.8-2.0mm的范围内或0.1-0.25倍内径的高度， 在内部流动的流体的雷诺数小于7000，以提高低雷诺数区域的传热性能，并使管内的压力损失最小化。

公开(公告)号：US20070000651A1

公开(公告)日：2007-01-04

申请号：US10555837

申请日：2003-10-27

申请人： Zengyuan Guo ,  Ji-An Meng ,  Weilin Hu ,  Zhixin Li

发明人： Zengyuan Guo ,  Ji-An Meng ,  Weilin Hu ,  Zhixin Li

IPC分类号： F28F13/18

CPC分类号： F28F1/426 ,  F28F1/42

摘要： An enhanced heat transfer tube with discrete bidirectionally inclined ribs (DBIR-tube) provides enhanced convective heat transfer both in laminar and turbulent flow regions. The inner surface of the tube is formed with bidirectionally inclined ribs, including left hand inclined ribs and right hand inclined ribs, with the ribs being in the form of discrete strip-like protrusions which respectively form a certain angle with respect to the axis of the tube and incline in two directions. With the hydrodynamic inner diameter of the tube represented by “d”, each bidirectionally inclined rib has a height less than or equal to 0.2 d, a circumferential width less than or equal to 0.5 d, and an axial length less than or equal to 2 d. A certain angle formed between the axis of each rib and the axis of the tube is ±5° to ±85°, the positive sign meaning that the internal rib is orientated in a right hand declining direction, and the negative sign meaning that the internal rib is orientated in a left hand declining direction.

摘要翻译： 具有离散双向倾斜肋（DBIR管）的增强型传热管在层流和湍流区域提供增强的对流热传递。 管的内表面形成有双向倾斜的肋，包括左手倾斜肋和右手倾斜肋，其中肋是分立的带状突起的形式，分别形成相对于 管和两个方向倾斜。 利用由“d”表示的管的流体动力学内径，每个双向倾斜肋的高度小于或等于0.2d，圆周宽度小于或等于0.5d，轴向长度小于或等于2 d。 每个肋骨的轴线和管轴之间形成的一定角度为±5°至±85°，内侧肋指向右侧倾斜方向的正号，而负号表示内部 肋沿左下方向取向。

公开(公告)号：US08215380B2

公开(公告)日：2012-07-10

申请号：US11884877

申请日：2005-05-11

申请人： Zhi xin Li ,  Ji an Meng ,  Mitsuharu Numata ,  Kazushige Kasai

发明人： Zhi xin Li ,  Ji an Meng ,  Mitsuharu Numata ,  Kazushige Kasai

IPC分类号： F28F1/42

CPC分类号： F28F1/42 ,  F28D7/0016 ,  F28F1/426

摘要： The present invention relates to a hot water heat transfer pipe that exchanges heat between its interior and exterior. A plurality of projections, each having a height in the range of 0.8-2.0 mm or 0.1-0.25 times the inner diameter, is provided in at least one part of an inner surface of a portion of the heat transfer pipe positioned in a section where the Reynolds number of the fluid flowing in the interior is less than 7,000 to improve the heat transfer performance in the low Reynolds number zone and minimize pressure loss inside the pipe.

摘要翻译： 本发明涉及一种在其内部和外部之间交换热量的热水传热管。 在传热管的一部分的内表面的至少一部分中设置有多个突起，每个突起具有在0.8-2.0mm的范围内或0.1-0.25倍内径的高度， 在内部流动的流体的雷诺数小于7000，以提高低雷诺数区域的传热性能，并使管内的压力损失最小化。