WO2004099698A1 - Intensive heat exchange tube with discontinuous ribs - Google Patents

Intensive heat exchange tube with discontinuous ribs Download PDF

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Publication number
WO2004099698A1
WO2004099698A1 PCT/CN2003/000905 CN0300905W WO2004099698A1 WO 2004099698 A1 WO2004099698 A1 WO 2004099698A1 CN 0300905 W CN0300905 W CN 0300905W WO 2004099698 A1 WO2004099698 A1 WO 2004099698A1
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WO
WIPO (PCT)
Prior art keywords
heat exchange
tube
double
exchange tube
discontinuous
Prior art date
Application number
PCT/CN2003/000905
Other languages
French (fr)
Chinese (zh)
Inventor
Ji'an Meng
Weilin Hu
Zhixin Li
Original Assignee
Tsinghua University
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Filing date
Publication date
Application filed by Tsinghua University filed Critical Tsinghua University
Priority to JP2004571496A priority Critical patent/JP4355294B2/en
Priority to AU2003280545A priority patent/AU2003280545A1/en
Priority to US10/555,837 priority patent/US20070000651A1/en
Publication of WO2004099698A1 publication Critical patent/WO2004099698A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/424—Means comprising outside portions integral with inside portions
    • F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element

Definitions

  • the invention relates to a discontinuous double-inclined inner rib reinforced heat exchange tube, which belongs to the technical field of enhanced heat exchange and heat exchangers. Background technique
  • Shell and tube heat exchangers have a wide range of applications in petroleum, chemical, power and many other fields.
  • Shell-and-tube heat exchangers usually use smooth round-section tubes, which have the advantages of simple manufacturing process, good safety, and low cost.
  • ordinary shell-and-tube replacement The heater has disadvantages such as large volume and many consumables.
  • people have invented various enhanced heat exchange tubes instead of ordinary round tubes.
  • convective heat transfer enhancement elements have been developed in the past 30 years.
  • the surface-roughened heat-exchanging tubes obtained by rolling have been widely and successfully applied in engineering, such as spirally grooved tubes and transverse grooved tubes.
  • the object of the present invention is to provide a new type of reinforced heat exchange tube-a "discontinuous double-inclined inner rib reinforced heat exchange tube", that is, a plurality of discontinuous, angled axes and inclined in two directions are provided in the tube.
  • a pair of oblique inner ribs Under the action of many double-inclined internal ribs, the fluid generates longitudinal vortices and / or other fluids in the tube, especially near the inner wall surface.
  • the radial flow inside the tube can significantly enhance heat exchange.
  • the invention is characterized in that there are discontinuous ribs on the inner wall surface of the reinforced heat exchange tube, which have a certain angle with the axis of the base tube and are inclined in two directions.
  • the rib and the right-handed oblique inner rib the height of the double oblique inner rib is equal to or less than 0.2d, the width is equal to or less than 0.5d, and the length of the double oblique inner rib is equal to or less than 2d, where d is the hydraulic inner diameter of the base pipe; preferably,
  • An included angle between the axis of the double-slanted inner rib and the axis of the base pipe is in the range of (5 ⁇ 85) degrees, a positive sign indicates a left-handed tilt, and a negative sign indicates a right-handed tilt; preferably, the double-slanted
  • the shape of the cross section of the inner rib is any one or a combination of the following: arc, rectangle, triangle, fan, streamline, and any shape composed of several curve
  • Examples 1 to 3 can generally increase the heat transfer coefficient by 80% to 150% for turbulent flow, which can be 30% higher than that of a horizontal grooved tube with good heat transfer effect, but its flow resistance is higher than that of a horizontal grooved tube.
  • the tube is 20% -50% smaller; for convective heat transfer in the transition zone, its enhanced heat transfer effect is also very significant, which has very important practical application value in engineering.
  • backflow transverse vortex
  • FIG. 1 to 3 can generally increase the heat transfer coefficient by 80% to 150% for turbulent flow, which can be 30% higher than that of a horizontal grooved tube with good heat transfer effect, but its flow resistance is higher than that of a horizontal grooved tube.
  • the tube is 20% -50% smaller; for convective heat transfer in the transition zone, its enhanced heat transfer effect is also very significant, which has very important practical application value in engineering.
  • backflow transverse vortex
  • FIG. 1 is a structural diagram of a discontinuous double-inclined inner rib reinforced heat exchange tube
  • FIG. 2 is a cross-sectional view taken along A_A in FIG. 1
  • FIG. 3 is a partially enlarged view of part B in FIG. 2
  • FIG. 5 is a schematic diagram of partly circumferential expansion structure of another discontinuous double-inclined-inner-rib reinforced heat-exchange tube.
  • the discontinuous double-inclined inner rib reinforced heat exchange tube is provided with a plurality of discontinuous rib-shaped protrusions on the inner wall surface of the heat exchange tube that have a certain angle with the axis and inclined in two directions.
  • the height of the double oblique inner rib is generally not more than 0.2d, and the width is generally not more than 0.5d.
  • the length is generally not greater than 2d (d is the hydraulic inner diameter of the base pipe).
  • the so-called "discontinuity" is a kind of rough element (ribbed protrusion) with a certain length compared with spiral grooved pipe (spiral continuous), threaded pipe (spiral continuous), and transverse grooved tube (circumferentially continuous). .
  • the manufacturing method of discontinuous double-inclined internal rib reinforced heat exchange tubes can be ordinary round tubes, low-rib tubes, threaded tubes, etc., which can be molded or rolled, or can be formed when rolling seamless tubes, and can also be welded with seams. Tubes take shape. The fluid in the tube generates multiple longitudinal vortices and / or other secondary flows under the action of multiple double-inclined internal ribs on the tube wall, and the vortices and / or other secondary flows are mainly concentrated near the tube wall surface, so that the turbulent heat exchange and The convection heat transfer process in the transition zone has a better strengthening effect.
  • FIG. 1 shows a structure of a discontinuous double-inclined inner rib reinforced heat exchange tube.
  • the inside of the tube has a discontinuous two-way spiral protrusion (referred to as a "discontinuous two-way spiral internal rib"), and the outside of the tube has a discontinuous two-way spiral groove.
  • reference numeral 1 denotes a discontinuous bidirectional spiral rib inside the pipe
  • reference numeral 2 denotes a discontinuous bidirectional spiral groove outside the pipe; the spiral rib and the spiral groove are simultaneously formed during processing.
  • Reference numeral d in FIG. 1 is the hydraulic inner diameter of the heat exchange tube
  • P is the axial length of a single double-inclined internal rib
  • C is the helix angle of the double-inclined internal rib.
  • the reference mark h is the height of the double oblique inner rib.
  • P 0.3d
  • h 0.05d.
  • Embodiment 2 FIG.
  • FIG. 4 illustrates another partially unfolded structure of a discontinuous double-inclined inner rib reinforced heat exchange tube.
  • the inside of the tube has discontinuous two-way spiral protrusions (double oblique inner ribs), and the outside of the tube has a smooth wall surface.
  • reference numeral 3 denotes a discontinuous bidirectional spiral rib arranged symmetrically; One right-slanted rib and one left-slanted rib adjacent to the circumferential direction constitute a vortex generator; four inclined ribs in the same cross section in the circumferential direction constitute two vortex generators.
  • the reference sign C in FIG. 4 is the helix angle of the double oblique internal rib, 0 ⁇ 50 degrees; a positive value indicates a right-handed rotation, a negative value indicates a left-handed rotation, and C in the figure indicates a right-handed rotation angle.
  • reference numeral 4 schematically represents a longitudinal vortex generated by the fluid near the inner wall surface under the action of a discontinuous bidirectional spiral inner rib.
  • FIG. 5 shows a partially circumferentially unfolded structure of another discontinuous double-inclined inner rib reinforced heat exchange tube.
  • the inside of the tube has a discontinuous two-way spiral protrusion (double oblique inner rib), and the outside of the tube has a discontinuous two-way spiral groove.
  • reference numeral 5 represents an asymmetrically arranged discontinuous bidirectional spiral rib
  • reference numeral 6 represents an asymmetrically arranged discontinuous bidirectional spiral groove.
  • a right-handed diagonal rib and a left-handed oblique rib are adjacent to each other in the pipe.
  • the ribs constitute a vortex generator; there are six inclined ribs on the inner wall of a small section of tube (less than 0.5d) to form three vortex generators.
  • the best embodiment of the discontinuous double-inclined inner rib heat exchange tube is rolling or compression forming.
  • the rolling and forming process of bidirectional spiral ribs in discontinuous tubes and bidirectional spiral grooves in outer tubes is a rolling molding process.
  • Discontinuous low-cutting edges are provided on the forming surface of the rolls.
  • the outer wall surface of the heat pipe is formed into a discontinuous two-way spiral groove under the extrusion of a low rolling blade, and the pipe is formed into a discontinuous two-way spiral rib.
  • the tube has discontinuous two-way spiral ribs, and the outer wall of the tube is smooth.
  • One of its manufacturing processes is similar to the manufacturing process of the internally threaded and smooth outer tube.
  • the second manufacturing process is rolling or molding. Reprocessing of formed discontinuous bidirectional spiral ribs inside the tube and bidirectional spiral groove heat exchange tubes outside the tube (cold drawing, etc.).
  • the manufacturing efficiency of the rolling or die-molding method of the discontinuous double-inclined inner rib heat exchange tube is 5-10 times higher than that of ordinary spiral groove, horizontal groove and thread surface heat exchange tubes. This is due to the discontinuousness of the inclined ribs.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The present invention relates to an intensive heat exchange tube with in two directions. The present invention involves a technical field about intensive heat exchange and heat exchanger. The intensive heat exchange tube of the present invention includes some prismatic protrudes inclined in two directions, i.e. the discontinuous ribs inclined in two directions. The ribs are disposed on the inside surface of tube, and make a definite angle with the axes of the tube. Each rib is equal to or smaller than 0.2d in height, equal to or smaller than 0.5d in width, and equal to or smaller than 2d in length, in which d represents the hydraulic inner diameter of the base tube. The angle between the inside rib and the axes of the base tube is in the range of ±(15-85) degree. In case of turbulent flow, with the intensive heat exchange tube of the present invention, the heat transfer coefficient increases (80-150) %, and is 30 % higher than that of the most efficient transverse grooved tube, but the flow resistance decreases (20-50) %. The heat exchange tube of the present invention can evidently enhance heat exchange, reduce flow resistance, and can be molded simply. With the heat exchange tube of the present invention, it is difficult to produce return flow nearby the inside ribs, and there is no flow dead region, so the resist scaling effect is better.

Description

不连续双斜内肋强化换热管 技术领域  Technical Field
本发明涉及一种不连续双斜内肋强化换热管， 其属于强化换 热和换热器技术领域。 背景技术  The invention relates to a discontinuous double-inclined inner rib reinforced heat exchange tube, which belongs to the technical field of enhanced heat exchange and heat exchangers. Background technique
管壳式换热器在石油、 化工、 动力等诸多领域有着广泛和大 量的应用。 管壳式换热器通常采用光滑圆形截面管， 它具有制造 工艺简单、 安全性好、 成本低等优点， 但同时由于光滑圆形截面 管的换热性能不够理想， 使普通管壳式换热器存在着体积大、 耗 材多等不足。 为了改变这种状况， 人们发明了各种强化换热管代 替普通圆管。 基于壁面扰流强化的思路， 近 30年来已发展了许多 对流换热强化元件。 特别是通过辊制获得的表面粗糙换热管， 在 工程中得到了较为普遍和成功的应用， 如螺旋槽管 （spirally grooved tube )、 橫槽管 （transverse grooved tube )。 此夕卜， 管内插 物如管内插扭曲带 （twisted-tape inserts )、 管内插弹簧丝等也有很 多应用。 这些换热管的共同缺点是流动阻力大、 肋或槽附近的回 流区易结垢、 加工效率较低、 制造费用较高。 发明内容  Shell and tube heat exchangers have a wide range of applications in petroleum, chemical, power and many other fields. Shell-and-tube heat exchangers usually use smooth round-section tubes, which have the advantages of simple manufacturing process, good safety, and low cost. However, due to the insufficient heat transfer performance of smooth-round-section tubes, ordinary shell-and-tube replacement The heater has disadvantages such as large volume and many consumables. In order to change this situation, people have invented various enhanced heat exchange tubes instead of ordinary round tubes. Based on the idea of wall spoiler enhancement, many convective heat transfer enhancement elements have been developed in the past 30 years. In particular, the surface-roughened heat-exchanging tubes obtained by rolling have been widely and successfully applied in engineering, such as spirally grooved tubes and transverse grooved tubes. In addition, tube inserts such as twisted-tape inserts and spring wires are also used in many applications. The common disadvantages of these heat exchange tubes are high flow resistance, easy fouling in the return area near the ribs or grooves, low processing efficiency, and high manufacturing costs. Summary of the Invention
本发明的目的是提供一种新的强化换热管一 "不连续双斜内 肋强化换热管"， 即在管内设置许多不连续的、 与轴线有一定夹角 且向两个方向倾斜的棱状凸起一双斜内肋。 在许多双斜内肋的作 用下， 流体在管内特别是在内壁面附近产生纵向涡流和 /或其它方 式的管内径向流动， 从而能显著的强化换热。 它符合 "对流换热 场协同原贝1 J，， （参看 Guo Z.Y, Mechanism and Control of Convective Heat Transfer― Coordination of Velocity and Heat Flow Field, Chinese Science Bulletin, 46(7):596-599 Apr 2001 ) , 即提高流体速 度场和温度梯度场的协同程度就能在阻力增加较少的条件下较好 地强化传热过程。 根据对流换热场协同原则对管内流动和换热进 行理论分析表明， 纵向涡流是强化管内对流换热的有效方式。 纵 向涡流及管内径向流动通常能显著改善速度场与温度梯度场的协 同程度， 从而能较好地强化管内对流换热过程。 本发明的 "不连 续双斜内肋强化换热管" 较螺旋槽管、 横槽管、 螺紋管和粗糙肋 管在湍流和过渡区具有更好的强化换热效果和较低的阻力损失， 可以克服或弥补现有技术的不足。 The object of the present invention is to provide a new type of reinforced heat exchange tube-a "discontinuous double-inclined inner rib reinforced heat exchange tube", that is, a plurality of discontinuous, angled axes and inclined in two directions are provided in the tube. A pair of oblique inner ribs. Under the action of many double-inclined internal ribs, the fluid generates longitudinal vortices and / or other fluids in the tube, especially near the inner wall surface. The radial flow inside the tube can significantly enhance heat exchange. It conforms to "Convective heat transfer field synergy original shell 1 J," (see Guo ZY, Mechanism and Control of Convective Heat Transfer-Coordination of Velocity and Heat Flow Field, Chinese Science Bulletin, 46 (7): 596-599 Apr 2001) That is, increasing the degree of synergy between the fluid velocity field and the temperature gradient field can better enhance the heat transfer process under the condition of less increase in resistance. The theoretical analysis of the flow and heat transfer in the tube according to the principle of convective heat transfer field shows that the vertical Vortex is an effective way to strengthen convective heat transfer in a tube. Longitudinal vortex and radial flow in a tube can usually significantly improve the degree of synergy between the velocity field and the temperature gradient field, so as to better strengthen the convective heat transfer process in the tube. The "discontinuity" of the present invention "Double-inclined internal rib reinforced heat exchange tube" has better enhanced heat exchange effect and lower resistance loss in turbulent flow and transition zone than spiral grooved tube, horizontal grooved tube, threaded tube and rough ribbed tube, which can overcome or make up for the existing Lack of technology.
本发明的特征在于： 所述强化换热管的内壁面存在不连续的 且与基管轴线有一定夹角并向两个方向倾斜的棱状凸起物一双斜 内肋， 即左旋方向斜内肋和右旋方向斜内肋， 双斜内肋的高度等 于或小于 0.2d, 宽度等于或小于 0.5d， 双斜内肋的长度等于或小 于 2d， 其中 d为基管水力内径； 优选地， 所述双斜内肋的轴线与基管轴线之间成土 （5〜85 ) 度的夹角， 正号表示为左旋方向倾斜， 负号表示为右旋方向倾斜； 优选地， 所述双斜内肋的横截面的形状是下述各种中的任何 一种或几种的组合： 圆弧形、 矩形、 三角形、 扇形、 流线形以及 由几段曲线和直线构成的任意形状； 优选地， 所述双斜内肋的轴线是下列各种中的任意一种或几 种的组合： 直线、 折线、 弧线、 螺旋线以及曲线； 优选地， 所述强化换热管的内壁面是下述各种中的任何一种 或几种的组合： 光滑表面、 螺纹表面以及低肋表面； 优选地， 所述强化换热管的外壁面是带槽的表面、 光滑表面、 螺紋表面、 低肋表面或翅片表面； 本发明与现有技术相比， 具有强化传热作用显著、 流阻较小 和成型简单等优点。 实施例 1〜3与普通圆管相比， 对于湍流一般 可提高传热系数 80%— 150%， 比传热效果很好的横槽管可高出 30%, 但它的流阻比横槽管小 20%— 50% ; 对于过渡区对流换热， 其强化换热效果也十分显著， 从而具有十分重要的工程实际应用 价值。 此外， 与横槽管或螺紋管相比， 本发明双斜内肋附近不易 产生回流 （横向涡流）， 管内不存在流动死区， 从而具有较好的抗 结垢作用。 附图说明 图 1是一种不连续双斜内肋强化换热管结构示意图； 图 2是图 1中的 A_ A剖面图； 图 3是图 2中 B部分的局部放大图； 图 4 是另一种不连续双斜内肋强化换热管的部分周向展开结 构示意图； 图 5是又一种不连续双斜内肋强化换热管的部分周向展开结 构示意图。 具体实施方式 不连续双斜内肋强化换热管， 是在换热管的内壁面设置许多 不连续的、 与轴线有一定夹角并向两个方向倾斜的棱状凸起物一 双斜内肋。双斜内肋的高度一般不大于 0.2d，宽度一般不大于 0.5d， 长度一般不大于 2d ( d为基管水力内径）。 所谓的 "不连续" 是相 对于螺旋槽管 （螺旋连续）、 螺紋管 （螺旋连续）、 横槽管 （周向 连续） 而言， 是一种具有一定长度的粗糙元 （棱状凸起）。 不连续 双斜内肋强化换热管的制造方法可以用普通圆管或低肋管、 螺纹 管等经过模压或辊轧， 也可在轧制无缝管时成形， 还可在悍接有 缝管时成形。 管内流体在管壁上多个双斜内肋的作用下产生多个 纵向涡流和 /或其它二次流， 且涡流和 /或其它二次流主要集中在管 壁面附近， 从而对湍流换热和过渡区对流换热过程具有较好的强 化效果。 实施例 1 : 图 1 中示出了一种不连续双斜内肋强化换热管结构。 该管内 侧具有不连续双向螺旋凸起 （简称 "不连续双向螺旋内肋"）， 管 外侧具有不连续双向螺旋槽。 The invention is characterized in that there are discontinuous ribs on the inner wall surface of the reinforced heat exchange tube, which have a certain angle with the axis of the base tube and are inclined in two directions. The rib and the right-handed oblique inner rib, the height of the double oblique inner rib is equal to or less than 0.2d, the width is equal to or less than 0.5d, and the length of the double oblique inner rib is equal to or less than 2d, where d is the hydraulic inner diameter of the base pipe; preferably, An included angle between the axis of the double-slanted inner rib and the axis of the base pipe is in the range of (5 ~ 85) degrees, a positive sign indicates a left-handed tilt, and a negative sign indicates a right-handed tilt; preferably, the double-slanted The shape of the cross section of the inner rib is any one or a combination of the following: arc, rectangle, triangle, fan, streamline, and any shape composed of several curves and straight lines; preferably The axis of the double oblique inner rib is any one or a combination of the following: a straight line, a polyline, an arc, a spiral, and a curve; Preferably, the inner wall surface of the strengthened heat exchange tube is below Any of the various Or a combination of several types: a smooth surface, a threaded surface, and a low-rib surface; preferably, the outer wall surface of the reinforced heat exchange tube is a grooved surface, a smooth surface, a threaded surface, a low-rib surface, or a fin surface; Compared with the prior art, it has the advantages of significantly enhanced heat transfer, smaller flow resistance, and simple molding. Compared with ordinary round tubes, Examples 1 to 3 can generally increase the heat transfer coefficient by 80% to 150% for turbulent flow, which can be 30% higher than that of a horizontal grooved tube with good heat transfer effect, but its flow resistance is higher than that of a horizontal grooved tube. The tube is 20% -50% smaller; for convective heat transfer in the transition zone, its enhanced heat transfer effect is also very significant, which has very important practical application value in engineering. In addition, compared with the horizontal grooved pipe or the threaded pipe, backflow (transverse vortex) is not easily generated near the double-sloping inner rib of the present invention, and there is no dead zone of flow in the pipe, so that it has better anti-fouling effect. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural diagram of a discontinuous double-inclined inner rib reinforced heat exchange tube; FIG. 2 is a cross-sectional view taken along A_A in FIG. 1; FIG. 3 is a partially enlarged view of part B in FIG. 2; Partial circumferential unfolding structure diagram of a discontinuous double-inclined internal rib-reinforced heat-exchange tube. FIG. 5 is a schematic diagram of partly circumferential expansion structure of another discontinuous double-inclined-inner-rib reinforced heat-exchange tube. DETAILED DESCRIPTION The discontinuous double-inclined inner rib reinforced heat exchange tube is provided with a plurality of discontinuous rib-shaped protrusions on the inner wall surface of the heat exchange tube that have a certain angle with the axis and inclined in two directions. . The height of the double oblique inner rib is generally not more than 0.2d, and the width is generally not more than 0.5d. The length is generally not greater than 2d (d is the hydraulic inner diameter of the base pipe). The so-called "discontinuity" is a kind of rough element (ribbed protrusion) with a certain length compared with spiral grooved pipe (spiral continuous), threaded pipe (spiral continuous), and transverse grooved tube (circumferentially continuous). . The manufacturing method of discontinuous double-inclined internal rib reinforced heat exchange tubes can be ordinary round tubes, low-rib tubes, threaded tubes, etc., which can be molded or rolled, or can be formed when rolling seamless tubes, and can also be welded with seams. Tubes take shape. The fluid in the tube generates multiple longitudinal vortices and / or other secondary flows under the action of multiple double-inclined internal ribs on the tube wall, and the vortices and / or other secondary flows are mainly concentrated near the tube wall surface, so that the turbulent heat exchange and The convection heat transfer process in the transition zone has a better strengthening effect. Embodiment 1 FIG. 1 shows a structure of a discontinuous double-inclined inner rib reinforced heat exchange tube. The inside of the tube has a discontinuous two-way spiral protrusion (referred to as a "discontinuous two-way spiral internal rib"), and the outside of the tube has a discontinuous two-way spiral groove.
在图 1和图 2中， 附图标记 1表示管内不连续双向螺旋肋， 附图标记 2 表示管外不连续双向螺旋槽； 螺旋肋和螺旋槽是在加 工中同时形成的。 图 1 中的附图标记 d 为换热管的水力内径， P 为单个双斜内肋的轴向长度， C 为双斜内肋螺旋角。 图 3 中， 附 图标记 h为双斜内肋高度。 P = 0.3d、 h = 0.05d。 C-±45度， 正值 表示右旋、 负值表示左旋。 实施例 2 : 图 4 中示出了另一种不连续双斜内肋强化换热管的部分周向 展开结构。 该管内侧具有不连续双向螺旋凸起 （双斜内肋）， 管外 为光滑壁面。  In Figs. 1 and 2, reference numeral 1 denotes a discontinuous bidirectional spiral rib inside the pipe, and reference numeral 2 denotes a discontinuous bidirectional spiral groove outside the pipe; the spiral rib and the spiral groove are simultaneously formed during processing. Reference numeral d in FIG. 1 is the hydraulic inner diameter of the heat exchange tube, P is the axial length of a single double-inclined internal rib, and C is the helix angle of the double-inclined internal rib. In Figure 3, the reference mark h is the height of the double oblique inner rib. P = 0.3d, h = 0.05d. C- ± 45 degrees, positive value means right-handed, negative value means left-handed. Embodiment 2: FIG. 4 illustrates another partially unfolded structure of a discontinuous double-inclined inner rib reinforced heat exchange tube. The inside of the tube has discontinuous two-way spiral protrusions (double oblique inner ribs), and the outside of the tube has a smooth wall surface.
在图 4中， 附图标记 3表示对称布置的不连续双向螺旋肋； 一个右旋斜肋与一个周向相临左旋斜肋组成一个涡流发生器； 在 同一横截面内沿周向有 4个斜肋组成两个涡流发生器。 图 4的附 图标记 C为双斜内肋螺旋角， Ο±50度； 正值表示右旋、 负值表 示左旋， 图中 C是右旋角。 图 4中， 附图标记 4示意性表示流体 在不连续双向螺旋内肋的作用下在内壁面附近产生的纵向涡流。 由于双斜内肋产生的纵向涡流主要存在于壁面附近， 因而在湍流 条件下具有较好的强化换热效果。 不连续的而且有一定斜度的双 斜内肋不易使流体产生横向涡流， 同时它使管内流通面积减少不 大， 因而这种管子的流阻较螺旋槽、 横槽和螺紋换热管小得多。 实施例 3 : 图 5 中示出了又一种不连续双斜内肋强化换热管的部分周向 展开结构。 该管内侧具有不连续双向螺旋凸起 （双斜内肋）， 管外 侧具有不连续双向螺旋槽。 In FIG. 4, reference numeral 3 denotes a discontinuous bidirectional spiral rib arranged symmetrically; One right-slanted rib and one left-slanted rib adjacent to the circumferential direction constitute a vortex generator; four inclined ribs in the same cross section in the circumferential direction constitute two vortex generators. The reference sign C in FIG. 4 is the helix angle of the double oblique internal rib, 0 ± 50 degrees; a positive value indicates a right-handed rotation, a negative value indicates a left-handed rotation, and C in the figure indicates a right-handed rotation angle. In FIG. 4, reference numeral 4 schematically represents a longitudinal vortex generated by the fluid near the inner wall surface under the action of a discontinuous bidirectional spiral inner rib. Since the longitudinal vortex generated by the double-inclined inner rib mainly exists near the wall surface, it has a better enhanced heat transfer effect under turbulent conditions. The discontinuous and double-inclined inner ribs are not easy to cause the fluid to generate lateral vortices, and at the same time it reduces the flow area in the tube. Therefore, the flow resistance of this kind of tube is smaller than that of spiral grooves, horizontal grooves and threaded heat transfer tubes. many. Embodiment 3: FIG. 5 shows a partially circumferentially unfolded structure of another discontinuous double-inclined inner rib reinforced heat exchange tube. The inside of the tube has a discontinuous two-way spiral protrusion (double oblique inner rib), and the outside of the tube has a discontinuous two-way spiral groove.
在图 5 中， 附图标记 5表示管内不对称布置的不连续双向螺 旋肋， 附图标记 6 表示管外不对称布置的不连续双向螺旋槽； 管 内一个右旋斜肋与一个周向相临左旋斜肋组成一个涡流发生器； 在一小段管 （小于 0.5d ) 的内壁面上有 6个斜肋组成三个涡流发 生器。 不连续双斜内肋换热管的最佳实施方式为滚轧或模压成型。 不连续管内双向螺旋肋一管外双向螺旋槽换热管的轧滚轧制成型 工艺， 是在轧滚的成型表面上设置不连续低轧刃， 当换热管经轧 滚轧制时， 换热管的外壁面在低轧刃的挤压作用下成型为不连续 双向螺旋槽， 其管内则成型为不连续双向螺旋肋。 管内具有不连 续双向螺旋肋， 而管外壁光滑的换热管， 其制造工艺之一是与内 螺紋外光滑管的制造工艺相类似； 制造工艺之二是用滚轧或模压 成型的不连续管内双向螺旋肋一管外双向螺旋槽换热管再加工 (冷拔等）。 不连续双斜内肋换热管的滚轧或模压成型加工方法的 制造效率比普通螺旋槽、 横槽和螺纹表面换热管的制造效率高 5 一 10倍， 这是由于斜肋的不连续性所带来的优点， 因而其制造成 本也相应降低。 In FIG. 5, reference numeral 5 represents an asymmetrically arranged discontinuous bidirectional spiral rib, and reference numeral 6 represents an asymmetrically arranged discontinuous bidirectional spiral groove. A right-handed diagonal rib and a left-handed oblique rib are adjacent to each other in the pipe. The ribs constitute a vortex generator; there are six inclined ribs on the inner wall of a small section of tube (less than 0.5d) to form three vortex generators. The best embodiment of the discontinuous double-inclined inner rib heat exchange tube is rolling or compression forming. The rolling and forming process of bidirectional spiral ribs in discontinuous tubes and bidirectional spiral grooves in outer tubes is a rolling molding process. Discontinuous low-cutting edges are provided on the forming surface of the rolls. The outer wall surface of the heat pipe is formed into a discontinuous two-way spiral groove under the extrusion of a low rolling blade, and the pipe is formed into a discontinuous two-way spiral rib. The tube has discontinuous two-way spiral ribs, and the outer wall of the tube is smooth. One of its manufacturing processes is similar to the manufacturing process of the internally threaded and smooth outer tube. The second manufacturing process is rolling or molding. Reprocessing of formed discontinuous bidirectional spiral ribs inside the tube and bidirectional spiral groove heat exchange tubes outside the tube (cold drawing, etc.). The manufacturing efficiency of the rolling or die-molding method of the discontinuous double-inclined inner rib heat exchange tube is 5-10 times higher than that of ordinary spiral groove, horizontal groove and thread surface heat exchange tubes. This is due to the discontinuousness of the inclined ribs. The advantages brought about by nature, so its manufacturing cost is correspondingly reduced.

Claims

权 利 要 求 Rights request
1. 一种含有内肋的不连续双斜内肋强化换热管，其特征在于： 管子内壁面存在双斜内肋， 即左旋方向斜内肋和右旋方向斜内肋， 它们是不连续的、 与基管轴线有一定夹角并向两个方向倾斜的棱 状凸起物， 所述双斜内肋的高度等于或小于 0.2d， 宽度等于或小 于 0.5d， 长度等于或小于 2d， 其中 d为基管水力内径。 1. A discontinuous double-inclined internal rib reinforced heat exchanger tube containing internal ribs, characterized in that there are double-inclined internal ribs on the inner wall surface of the tube, that is, left-inclined internal ribs and right-inclined internal ribs are discontinuous The ribbed protrusions that have a certain angle with the axis of the base pipe and are inclined in two directions, the height of the double oblique inner rib is equal to or less than 0.2d, the width is equal to or less than 0.5d, and the length is equal to or less than 2d. Where d is the hydraulic inner diameter of the base pipe.
2. 根据权利要求 1所述的不连续双斜内肋强化换热管， 其特 征在于： 所述双斜内肋的轴线与基管轴线之间成土 （5〜85 ) 度的 夹角， 其中正号表示为右旋方向倾斜， 负号表示为左旋方向倾斜。 2. The discontinuous double-inclined inner rib reinforced heat exchange tube according to claim 1, characterized in that the angle between the axis of the double-inclined inner rib and the axis of the base pipe forms an angle of soil (5 ~ 85) degrees, A positive sign indicates a right-handed tilt and a negative sign indicates a left-handed tilt.
3. 根据权利要求 1所述的不连续双斜内肋强化换热管， 其特 征在于： 所述双斜内肋的横截面的形状是下述各种中的任何一种 或几种的组合： 圆弧形、 矩形、 三角形、 扇形、 流线形以及由几 段曲线和直线构成的任意形状。 3. The discontinuous double-inclined inner rib reinforced heat exchange tube according to claim 1, wherein the shape of the cross section of the double-inclined inner rib is any one or a combination of the following : Arc, rectangle, triangle, fan, streamline, and any shape composed of several curves and straight lines.
4. 根据权利要求 1所述的不连续双斜内肋强化换热管， 其特 征在于： 所述双斜内肋的轴线是下列各种中的任何一种或几种的 组合： 直线、 折线、 弧线、 螺旋线以及曲线。 4. The discontinuous double-inclined inner rib reinforced heat exchange tube according to claim 1, wherein: the axis of the double-inclined inner rib is any one or a combination of the following: a straight line, a polyline , Arcs, spirals and curves.
5. 根据权利要求 1所述的不连续双斜内肋强化换热管， 其特 征在于： 所述强化换热管的内壁面是下述各种中的任何一种或几 种的组合： 光滑表面、 螺纹表面以及低肋表面。 5. The discontinuous double-inclined inner rib reinforced heat exchange tube according to claim 1, wherein the inner wall surface of the reinforced heat exchange tube is any one or a combination of the following: smooth Surface, threaded surface, and low rib surface.
6. 根据权利要求 1所述的不连续双斜内肋强化换热管， 其特 征在于： 所述强化换热管的外壁面是带槽的表面、 光滑表面、 螺 紋表面、 低肋表面或翅片表面。 6. The discontinuous double-inclined inner rib reinforced heat exchange tube according to claim 1, wherein an outer wall surface of the reinforced heat exchange tube is a grooved surface, a smooth surface, a threaded surface, a low-rib surface, or a fin Sheet surface.
PCT/CN2003/000905 2003-05-10 2003-10-27 Intensive heat exchange tube with discontinuous ribs WO2004099698A1 (en)

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JP2004571496A JP4355294B2 (en) 2003-05-10 2003-10-27 Enhanced heat exchanger tube with discontinuous bi-directionally inclined internal ribs
AU2003280545A AU2003280545A1 (en) 2003-05-10 2003-10-27 Intensive heat exchange tube with discontinuous ribs
US10/555,837 US20070000651A1 (en) 2003-05-10 2003-10-27 An enhanced heat transfer tube with discrete bidirectionally inclined ribs

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CNB031251323A CN1211633C (en) 2003-05-10 2003-05-10 Non-continuous double diagonal internal rib reinforced heat exchange tube

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103940283A (en) * 2014-04-02 2014-07-23 中国科学院广州能源研究所 Longitudinal vortex synergistic-action heat transmission element

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451531C (en) 2005-03-25 2009-01-14 清华大学 Water heater heat exchange tube
JP2007333254A (en) * 2006-06-13 2007-12-27 Calsonic Kansei Corp Tube for heat-exchanger
JP2009264644A (en) * 2008-04-24 2009-11-12 Panasonic Corp Heat exchanger
JP5513738B2 (en) * 2008-12-24 2014-06-04 東芝キヤリア株式会社 Heat exchanger and heat pump water heater
CN102435087A (en) * 2011-09-21 2012-05-02 西安交通大学 E-shaped axially-symmetrical strengthened heat-exchanging element
CN102570696A (en) * 2012-03-20 2012-07-11 中科盛创（青岛）电气有限公司 Expansion tube type water-cooling base for motor
CN102706180A (en) * 2012-05-25 2012-10-03 南京白云化工环境监测有限公司 Immersive coil type heat-exchanger
DE102012022363A1 (en) * 2012-11-15 2014-05-15 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Internal heat exchanger for a motor vehicle air conditioning system
CN105509534A (en) * 2014-09-25 2016-04-20 天津市华春新能源技术发展有限公司 Oblique-cone-shaped low-resistance fin tube
CN104833256B (en) * 2015-04-30 2016-10-05 湖南众合节能环保有限公司 Manage interior compound intensified heat-transfer element and be provided with its heat exchanger tube
CN104930880B (en) * 2015-06-06 2017-04-05 浙江工业大学 A kind of pulsation flow tube shell type heat exchanger and its heat-exchange method
CN105115338B (en) * 2015-08-31 2017-08-25 东南大学 A kind of phase transition heat accumulation unit
CN105486143A (en) * 2015-12-18 2016-04-13 重庆东京散热器有限公司 Radiating tube structure
SE540857C2 (en) * 2017-02-03 2018-12-04 Valmet Oy Heat transfer tube and method for manufacturing a heat transfer tube
CN107270763B (en) * 2017-03-23 2023-09-05 托普工业(江苏)有限公司 Inner fin tube heat exchanger
CN109724448B (en) * 2017-10-27 2021-04-13 中国石油化工股份有限公司 Enhanced heat transfer tube, cracking furnace and atmospheric and vacuum heating furnace
CN109029020A (en) * 2018-06-27 2018-12-18 芜湖盘云石磨新能源科技有限公司 A kind of carbon dioxide refrigeration gas cooler
WO2020013292A1 (en) * 2018-07-13 2020-01-16 カルソニックカンセイ株式会社 Heat exchange tube, method for manufacturing heat exchange tube, and heat exchanger
CN111250028B (en) * 2020-03-26 2022-02-08 河南城建学院 Maillard reactor for recycling rectifying tower bottoms in soybean processing
CN113701137B (en) * 2020-11-03 2022-07-26 中北大学 Steam boiler with optimized distribution of temperature-equalizing plates
CN114100539A (en) * 2021-11-02 2022-03-01 中国石化工程建设有限公司 Intraductal enhanced heat transfer plug-in components and pyrolysis furnace

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1087162A (en) * 1992-10-02 1994-05-25 运载器有限公司 Internally ribbed heat transfer tube
CN1094502A (en) * 1992-11-30 1994-11-02 瑞典通用电器勃朗勃威力公司 The air cooling sleeve pipe of using as superconducting applications in the cryostat,
CN1120658A (en) * 1994-07-11 1996-04-17 运载器有限公司 Heat transfer tube

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3826304A (en) * 1967-10-11 1974-07-30 Universal Oil Prod Co Advantageous configuration of tubing for internal boiling
US3902552A (en) * 1973-05-10 1975-09-02 Olin Corp Patterned tubing
US4470452A (en) * 1982-05-19 1984-09-11 Ford Motor Company Turbulator radiator tube and radiator construction derived therefrom
JPH06100432B2 (en) * 1984-06-20 1994-12-12 株式会社日立製作所 Heat transfer tube
JPH0670556B2 (en) * 1985-06-14 1994-09-07 株式会社日立製作所 Heat transfer tube and manufacturing method thereof
JP3266886B2 (en) * 1993-02-24 2002-03-18 株式会社日立製作所 Heat transfer tube
US5577555A (en) * 1993-02-24 1996-11-26 Hitachi, Ltd. Heat exchanger
JPH07208888A (en) * 1994-01-14 1995-08-11 Toyo Radiator Co Ltd Tube for heat exchanger for air conditioner and heat exchanger for air conditioner
US5791405A (en) * 1995-07-14 1998-08-11 Mitsubishi Shindoh Co., Ltd. Heat transfer tube having grooved inner surface
JP2842810B2 (en) * 1995-07-14 1999-01-06 三菱伸銅株式会社 Heat transfer tube with internal groove
JP3541334B2 (en) * 1996-03-22 2004-07-07 東洋ラジエーター株式会社 Welded pipe with internal groove for heat exchanger for air conditioning
SE517450C2 (en) * 1999-06-18 2002-06-04 Valeo Engine Cooling Ab Fluid transport tubes and methods and apparatus for producing the same
SE521816C2 (en) * 1999-06-18 2003-12-09 Valeo Engine Cooling Ab Fluid transport pipes and vehicle coolers
DE10127084B4 (en) * 2000-06-17 2019-05-29 Mahle International Gmbh Heat exchanger, in particular for motor vehicles
JP4638583B2 (en) * 2000-09-11 2011-02-23 チタンエックス エンジン クーリング ホールディング アクチボラグ Fluid transport tube and automotive cooler comprising the tube
JP2002130976A (en) * 2000-10-30 2002-05-09 Tokyo Gas Co Ltd Heating tube for absorption heat-exchanger and the absorption heat-exchanger
JP2002257432A (en) * 2001-02-26 2002-09-11 Furukawa Electric Co Ltd:The Heat transfer pipe for absorber
JP3774843B2 (en) * 2001-05-25 2006-05-17 マルヤス工業株式会社 Multi-tube heat exchanger
US7011150B2 (en) * 2004-04-20 2006-03-14 Tokyo Radiator Mfg. Co., Ltd. Tube structure of multitubular heat exchanger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1087162A (en) * 1992-10-02 1994-05-25 运载器有限公司 Internally ribbed heat transfer tube
CN1094502A (en) * 1992-11-30 1994-11-02 瑞典通用电器勃朗勃威力公司 The air cooling sleeve pipe of using as superconducting applications in the cryostat,
CN1120658A (en) * 1994-07-11 1996-04-17 运载器有限公司 Heat transfer tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103940283A (en) * 2014-04-02 2014-07-23 中国科学院广州能源研究所 Longitudinal vortex synergistic-action heat transmission element

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