WO2017007355A1 - Condensing heat exchanger flue tube - Google Patents
Condensing heat exchanger flue tube Download PDFInfo
- Publication number
- WO2017007355A1 WO2017007355A1 PCT/PL2016/000074 PL2016000074W WO2017007355A1 WO 2017007355 A1 WO2017007355 A1 WO 2017007355A1 PL 2016000074 W PL2016000074 W PL 2016000074W WO 2017007355 A1 WO2017007355 A1 WO 2017007355A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tube
- pits
- length
- flue
- embossed pits
- Prior art date
Links
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
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
-
- 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
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in cross-section
-
- 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
- F28F1/08—Tubular elements crimped or corrugated in longitudinal section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
Definitions
- the invention relates to a flue tube of a condensing heat exchanger to be used in central heating systems and tap water systems.
- European patent application EP2384837 describes a heat exchanger tube with a non-circular cross section, especially rectangular, formed of a tube of a circular cross section, and having a corrugated surface in the longitudinal and transverse direction, with a corrugation amplitude varying between 0.2 and 1.2 times the outer diameter of the circular tube.
- EP1429085 describes a tube with a variable cross section along its length and the planar portion in the central area.
- the aim of the invention is to develop a flue tube for a fired condensing heat exchanger, intensifying the heat exchange process while reducing flue gas flow resistance, and preserving the condensing nature of the phenomena occurring in the heat exchanger.
- the aim is to modify the circular shape of the tube surface, by generating major flow disturbances in flue gas, with little deformation to minimise stresses resulting from deformation, which directly affects the life cycle of the heat exchanger.
- This aim is achieved by developing a new geometry of the flue tube.
- a flue tube of a condensing heat exchanger characterised in that it has embossed pits formed along the length of the tube, and said embossed pits are pointed towards the centre of the tube, and said pits are situated opposite each other, and two opposite embossed pits create a section, where the distance between the tips of the pits measured inside the tube in the section being 1.0 mm at most, and the ratio of the length of the tube to its cross-sectional circumference washed by flue gas is between 2.5 and 6.5, and the tube at the top and bottom has a cylindrical shape.
- the upper cylindrical part of the tube has a length of between 0.25 and 1.5 of its circumference of the cross section washed by flue gas.
- the arrangement of adjacent sections of embossed pits are not collinear along the length of the tube, and in particular, they are arranged at an angle of 90° or 45° to one another.
- Sections of the pits are preferably arranged uniformly along the length of the tube, or the distance between the sections of the pits decreases along the length of the tube.
- the pits have a circular, oval or drop-like shape.
- the cross section of the tube between adjacent sections has a circular shape or square shape with rounded vertices and sides curved towards the axis.
- the developed proportions and arrangement of pits in accordance with the invention preserves the condensing nature of the phenomena occurring in the heat exchanger, while reducing the flow resistance of flue gas through the tube and increasing the flow turbulence.
- Fig. 1 shows an isometric view of the tube, with drop-shaped pits evenly spaced along the length of the tube;
- Figs. 2 and 3 the tube as in Fig. 1 , in a side view;
- Fig. 4 the tube as in Fig. 1 , in a top view;
- Figs. 5 and 6 the tube as in Fig. 1 , in an axial section;
- Fig. 7 the tube as in Fig. 1 , in a cross section;
- Fig. 8 the tube in isometric view, with circular-shaped pits evenly spaced along the length of the tube;
- Fig. 15 the tube in an isometric view, with oval-shaped pits evenly spaced along the length of the tube;
- Fig. 21 the tube as in Fig. 15, in a cross section;
- Fig. 22 the tube in an isometric view, with drop-shaped pits evenly spaced along the length of the tube, in a different version;
- Fig. 29 the tube in an isometric view, with circular-shaped pits evenly spaced along the length of the tube, in a different version;
- Fig. 32 the tube as in Fig. 29, in a top view
- Fig. 33 and Fig. 34 - the tube as in Fig. 29, in an axial sectional;
- Fig. 35 the tube as in Fig. 29, in a cross-sectional view;
- Fig. 36 the tube in an isometric view, with oval-shaped pits evenly spaced along the length of the tube, in a different version;
- Fig. 43 the tube in an isometric view, with drop-shaped pits evenly spaced along the length of the tube;
- Fig. 46 the tube as in Fig. 43, in a top view
- Fig. 49 the tube as in Fig. 43, in a cross-sectional view
- Fig. 50 the tube in an isometric view, with circular-shape pits unevenly spaced along the length of the tube;
- Fig. 56 the tube as in Fig. 50, in a cross-sectional view
- Fig. 57 the tube in an isometric view, with oval-shaped pits unevenly spaced along the length of the tube;
- Fig. 60 the tube as in Fig. 57, in a top view
- Fig. 64 the tube in an isometric view, with drop-shaped pits evenly spaced along the length of the tube, in a different version;
- Fig. 70 the tube as in Fig. 64, in a cross-sectional view
- Fig. 71 the tube in an isometric view, with circular-shaped pits unevenly spaced along the length of the tube, in a different version;
- Fig. 74 the tube as in Fig. 71, in a top view;
- Fig. 78 the tube in an isometric view, with oval-shaped pits unevenly spaced along the length of the tube, in a different version;
- a flue tube of a condensing heat exchanger in its example embodiment, has embossed pits directed towards the inside of the tube 1.
- the flue tube 1 has two embossed pits 2 facing each other and forming together a separate section.
- the distance between the tips of the pits in the tube in the section is 0.5 mm, and the ratio of flue tube 1 length L to its cross-sectional circumference washed by flue gas is 3.5.
- Adjacent sections of pits 2 are located along the tube 1 at an angle of 90° to one another.
- the tube 1 at the top is cylindrical, with a length H which is 1.0 times its cross-sectional circumference washed by flue gas.
- the pits 2 are drop-shaped; in other variants shown in Figs. 8 to 14 and Figs. 29 to 35, the pits 2 are circular in shape; and in another, shown in Figs. 15 In these embodiments of the invention, the sections of the pits 2 are evenly arranged along the length L of the tube 1.
- the sections of the pits 2 are arranged unevenly along the length L of the tube in such a way that the distance S between the sections decrease along the length of the tube.
- the cross section of the tube 1 between adjacent sections has a circular shape, and for those shown in Figs. 22 to 42 and Figs. 64 to 84, it forms a square with rounded vertices and sides curved towards the axis.
- the distance between the tips of the embossed pits 2 inside the flue tube 1 in the section cannot be greater than 1.0 mm, and the ratio of flue tube 1 length L to its cross-sectional circumference washed by flue gas is between 2.5 and 6.5, and the length L of the upper cylindrical part of the flue tube 1 is between 0.25 and 1.5 times the circumference of its cross section washed by flue gas.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cleaning In General (AREA)
Abstract
A flue tube of a condensing heat exchanger has embossed pits (2) formed along the length of the tube (1), and said pits (2) are pointed towards the centre of the tube (1), and said pits (2) are placed facing each other, and two opposite pits (2) create a section, where the distance between the tips of the pits (2) measured inside the tube (1) in the section being 1.0 mm at most, and the ratio of the length (L) of the tube (1) to its cross-sectional circumference washed by flue gas is between 2.5 and 6.5, and the tube (1) at the top and bottom has a cylindrical shape.
Description
Condensing heat exchanger flue tube
The invention relates to a flue tube of a condensing heat exchanger to be used in central heating systems and tap water systems.
There are known heat exchangers that are equipped with means for turbulence stimulation in flue gas flowing therethrough, intensifying the heat exchange process.
European patent application EP2384837 describes a heat exchanger tube with a non-circular cross section, especially rectangular, formed of a tube of a circular cross section, and having a corrugated surface in the longitudinal and transverse direction, with a corrugation amplitude varying between 0.2 and 1.2 times the outer diameter of the circular tube.
European patent application EP1429085 describes a tube with a variable cross section along its length and the planar portion in the central area.
The aim of the invention is to develop a flue tube for a fired condensing heat exchanger, intensifying the heat exchange process while reducing flue gas flow resistance, and preserving the condensing nature of the phenomena occurring in the heat exchanger. In particular, the aim is to modify the circular shape of the tube surface, by generating major flow disturbances in flue gas, with little deformation to minimise stresses resulting from deformation, which directly affects the life cycle of the heat exchanger.
This aim is achieved by developing a new geometry of the flue tube.
A flue tube of a condensing heat exchanger, characterised in that it
has embossed pits formed along the length of the tube, and said embossed pits are pointed towards the centre of the tube, and said pits are situated opposite each other, and two opposite embossed pits create a section, where the distance between the tips of the pits measured inside the tube in the section being 1.0 mm at most, and the ratio of the length of the tube to its cross-sectional circumference washed by flue gas is between 2.5 and 6.5, and the tube at the top and bottom has a cylindrical shape.
Preferably, the upper cylindrical part of the tube has a length of between 0.25 and 1.5 of its circumference of the cross section washed by flue gas. Preferably, the arrangement of adjacent sections of embossed pits are not collinear along the length of the tube, and in particular, they are arranged at an angle of 90° or 45° to one another.
Sections of the pits are preferably arranged uniformly along the length of the tube, or the distance between the sections of the pits decreases along the length of the tube.
Preferably, the pits have a circular, oval or drop-like shape.
Preferably, the cross section of the tube between adjacent sections has a circular shape or square shape with rounded vertices and sides curved towards the axis.
The developed proportions and arrangement of pits in accordance with the invention preserves the condensing nature of the phenomena occurring in the heat exchanger, while reducing the flow resistance of flue gas through the tube and increasing the flow turbulence.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
In the drawings:
Fig. 1 shows an isometric view of the tube, with drop-shaped pits
evenly spaced along the length of the tube;
Figs. 2 and 3 - the tube as in Fig. 1 , in a side view;
Fig. 4 - the tube as in Fig. 1 , in a top view;
Figs. 5 and 6 - the tube as in Fig. 1 , in an axial section;
Fig. 7 - the tube as in Fig. 1 , in a cross section;
Fig. 8 - the tube in isometric view, with circular-shaped pits evenly spaced along the length of the tube;
Fig. 9 and Fig. 10 - the tube as in Fig. 8, in a side view;
Fig. 11 - the tube as in Fig. 8, in a top view;
Fig. 12 and Fig. 13 - the tube as in Fig. 8, in an axial section;
Fig. 14 - the tube as in Fig. 8, in a cross section;
Fig. 15 - the tube in an isometric view, with oval-shaped pits evenly spaced along the length of the tube;
Fig. 16 and Fig. 17 - the tube as in Fig. 15, in a side view;
Fig. 18 - the tube as in Fig. 15, in a top view;
Figs. 19 and 20 - the tube as in Fig. 15, in an axial sectional view;
Fig. 21 - the tube as in Fig. 15, in a cross section;
Fig. 22 - the tube in an isometric view, with drop-shaped pits evenly spaced along the length of the tube, in a different version;
Figs. 23 and 24, the tube as in Fig. 22, in a side view;
Fig. 25 - the tube as in Fig. 22, in a top view;
Fig. 26 and Fig. 27 - the tube as in Fig. 22, in an axial sectional view;
Fig. 28 - the tube as in Fig. 22, in a cross-sectional view;
Fig. 29 - the tube in an isometric view, with circular-shaped pits evenly spaced along the length of the tube, in a different version;
Figure 30 and Fig. 31 - the tube as in Fig. 29, in a side view;
Fig. 32 - the tube as in Fig. 29, in a top view;
Fig. 33 and Fig. 34 - the tube as in Fig. 29, in an axial sectional;
Fig. 35 - the tube as in Fig. 29, in a cross-sectional view;
Fig. 36 - the tube in an isometric view, with oval-shaped pits evenly spaced along the length of the tube, in a different version;
Figs. 37 and 38 - the tube as in Fig. 36, in a side view;
Fig. 39 - the tube as in Fig. 36, in a top view;
Fig. 40 and Fig. 41 - the tube as in Fig. 36, in an axial sectional view;
Fig. 42 - the tube as in Fig. 36, in a cross-sectional view;
Fig. 43 - the tube in an isometric view, with drop-shaped pits evenly spaced along the length of the tube;
Fig, 44 and Fig. 45 - the tube as in Fig. 43, in a side view;
Fig. 46 - the tube as in Fig. 43, in a top view;
Fig. 47 and Fig. 48 - the tube as in Fig. 43, in an axial sectional view;
Fig. 49 - the tube as in Fig. 43, in a cross-sectional view;
Fig. 50 - the tube in an isometric view, with circular-shape pits unevenly spaced along the length of the tube;
Fig. 51 and Fig. 52 - the tube as in Fig. 50, in a side view;
Fig. 53 - the tube as in Fig. 50, in a top view;
Fig. 54 and Fig. 55 - the tube as in Fig. 50, in an axial sectional view;
Fig. 56 - the tube as in Fig. 50, in a cross-sectional view;
Fig. 57 - the tube in an isometric view, with oval-shaped pits unevenly spaced along the length of the tube;
Fig. 58 and Fig. 59 - the tube as in Fig. 57, in a side view;
Fig. 60 - the tube as in Fig. 57, in a top view;
Fig. 61 and Fig. 62 - the tube as in Fig. 57, in an axial sectional view;
Fig. 63 - the tube as in Fig. 57, in a cross-sectional view;
Fig. 64 - the tube in an isometric view, with drop-shaped pits evenly spaced along the length of the tube, in a different version;
Fig. 65 and Fig. 66 - the tube as in Fig. 64, in a side view;
Fig. 67 - the tube as in Fig. 64, in a top view;
Fig. 68 and Fig- 69 - the tube as in Fig. 64, in an axial sectional view;
Fig. 70 - the tube as in Fig. 64, in a cross-sectional view;
Fig. 71 - the tube in an isometric view, with circular-shaped pits unevenly spaced along the length of the tube, in a different version;
Fig. 72 and Fig. 73 - the tube as in Fig. 71 , in a side view;
Fig. 74 - the tube as in Fig. 71, in a top view;
Fig. 75 and Fig. 76 - the tube as in Fig. 71 , in an axial sectional view;
Fig. 77 - the tube as in Fig. 71, in a cross-sectional view;
Fig. 78 - the tube in an isometric view, with oval-shaped pits unevenly spaced along the length of the tube, in a different version;
Fig. 79 and Fig. 80 - the tube as in Fig. 78, in a side view;
Fig. 81 - the tube as in Fig. 78, in a top view;
Fig. 82 and Fig. 83 - the tube as in Fig. 78, in an axial sectional view; Fig. 84 - the tube as in Fig. 78, in a cross-sectional view.
A flue tube of a condensing heat exchanger, in its example embodiment, has embossed pits directed towards the inside of the tube 1. At a predefined height, the flue tube 1 has two embossed pits 2 facing each other and forming together a separate section. The distance between the tips of the pits in the tube in the section is 0.5 mm, and the ratio of flue tube 1 length L to its cross-sectional circumference washed by flue gas is 3.5. Adjacent sections of pits 2 are located along the tube 1 at an angle of 90° to one another. The tube 1 at the top is cylindrical, with a length H which is 1.0 times its cross-sectional circumference washed by flue gas.
In the embodiments shown in Figs. 1 to 7 and Figs. 22 to 28, the pits 2 are drop-shaped; in other variants shown in Figs. 8 to 14 and Figs. 29 to 35, the pits 2 are circular in shape; and in another, shown in Figs. 15
In these embodiments of the invention, the sections of the pits 2 are evenly arranged along the length L of the tube 1.
In other embodiments of the invention, shown in Figs. 43 to 49 and Figs. 64 to 70 with drop-shaped pits, Figs. 50 to 56 and Figs. 71 to 77 with circular pits, and Figs. 57 to 63 and Figs. 78 to 84 with oval pits, the sections of the pits 2 are arranged unevenly along the length L of the tube in such a way that the distance S between the sections decrease along the length of the tube.
In the embodiments of the invention, described above and shown in Figs. 1 to 21 and Figs. 43 to 63, the cross section of the tube 1 between adjacent sections has a circular shape, and for those shown in Figs. 22 to 42 and Figs. 64 to 84, it forms a square with rounded vertices and sides curved towards the axis.
In other variants of the embodiment described above, the distance between the tips of the embossed pits 2 inside the flue tube 1 in the section cannot be greater than 1.0 mm, and the ratio of flue tube 1 length L to its cross-sectional circumference washed by flue gas is between 2.5 and 6.5, and the length L of the upper cylindrical part of the flue tube 1 is between 0.25 and 1.5 times the circumference of its cross section washed by flue gas.
It was found that for a flue gas temperature of 1 450°C to 1 550°C, at the inlet to the flue tube and with a flow rate of 0.83 - 0.89 kg h of flue gas in the tube (for natural gas, C02 = 9%) and an initial temperature of 30°C and dT = 20 K of heated liquid, with a counterflow of 22 - 26 1/h for the tube, the flue gas at a distance of 155 - 225 mm from the inlet to the tube reaches the dew point, and the pressure drop is not more than 375 Pa.
Claims
1. A flue tube of a condensing heat exchanger, characterised in that it has embossed pits (2) formed along the length of the tube (1), and said embossed pits (2) are pointed towards the centre of the tube (1), and said pits (2) are placed facing each other, and two opposite pits (2) create a section, where the distance between the tips of the pits (2) measured inside the tube (1) in the section being 1.0 mm at most, and the ratio of the length (L) of the tube (1) to its cross-sectional circumference washed by flue gas is between 2.5 and 6.5, and the tube (1) at the top and bottom has a cylindrical shape.
2. The tube, according to Claim 1 , characterised in that the upper cylindrical part of the tube (1) has a length (H) of 0.25 to 1.5 times its cross-sectional circumference washed by flue gas.
3. The tube according to Claim 1, characterised in that the adjacent sections of embossed pits (2) are not collinear along the length of the tube
(1).
4. The tube according to Claim 3, characterised in that mutually adjacent sections of embossed pits (2) are located at an angle of 90° to each other.
5. The tube according to Claim 3, characterised in that mutually adjacent sections of embossed pits (2) are located at an angle of 45° to each other.
6. The tube according to Claims 1 or 3 to 5, characterised in that that sections of embossed pits (2) are evenly spaced along the length of the tube (l).
7. The tube according to Claims 1 or 3 to 5, characterised in that the distance (S) between the sections of embossed pits (2) decreases along the length of the tube (1).
8. The tube, according to Claims 1 or 3 to 7, characterised in that the cross section of the tube (1) between adjacent sections has a circular shape.
9. The tube according to Claims 1 or 3 to 7, characterised in that the cross section of the tube (1) between adjacent sections has the shape of a square with rounded vertices and sides curved towards the axis.
10. The tube according to Claims 1 or 3 to 7, characterised in that the embossed pits (2) have a circular shape.
1 1. The tube according to Claims 1 or 3 to 7, characterised in that the embossed pits (2) have an oval shape.
12. The tube according to Claims 1 or 3 to 7, characterised in that the embossed pits (2) have a drop-like shape.
13. A method of heat exchange in the flue tube according to Claim 1 to 12, characterised in that for a flue gas temperature of 1 450°C to 1 550°C, at the inlet to the flue tube (1) and with a flow rate of 0.83 - 0.89 kg/h of flue gas in the flue tube (for natural gas, C02= 9%) and for an initial temperature of 30°C and dT = 20 K of heated liquid, with a counterflow of 22 - 26 1/h in the flue tube (1), the flue gas at a distance of 155 - 225 mm from the inlet to this tube (1) reaches the dew point, and the pressure drop is not more than 375 Pa.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL413027A PL232198B1 (en) | 2015-07-05 | 2015-07-05 | Furnace flue of a condensing heat exchange coil |
PLP.413027 | 2015-07-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017007355A1 true WO2017007355A1 (en) | 2017-01-12 |
Family
ID=56611535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/PL2016/000074 WO2017007355A1 (en) | 2015-07-05 | 2016-06-30 | Condensing heat exchanger flue tube |
Country Status (2)
Country | Link |
---|---|
PL (1) | PL232198B1 (en) |
WO (1) | WO2017007355A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11073344B2 (en) | 2019-04-24 | 2021-07-27 | Rheem Manufacturing Company | Heat exchanger tubes |
US11774179B2 (en) | 2017-06-22 | 2023-10-03 | Rheem Manufacturing Company | Heat exchanger tubes and tube assembly configurations |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113701137B (en) * | 2020-11-03 | 2022-07-26 | 中北大学 | Steam boiler with optimized distribution of temperature-equalizing plates |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5839505A (en) * | 1996-07-26 | 1998-11-24 | Aaon, Inc. | Dimpled heat exchange tube |
US20020005275A1 (en) * | 1998-12-04 | 2002-01-17 | Beckett Gas. Inc. | Heat exchanger tube with integral restricting and turbulating structure |
EP1429085A1 (en) | 2002-12-10 | 2004-06-16 | Apen Group S.p.A. | Highly efficient heat exchanger and combustion chamber assembly for boilers and heated air generators |
EP2384837A2 (en) | 2010-05-03 | 2011-11-09 | Benteler Automobiltechnik GmbH | Heat exchanger and method for manufacturing a heat exchanger pipe |
WO2015059537A2 (en) * | 2013-10-11 | 2015-04-30 | Tecnoinox S.R.L. | Improved type of heat exchanger preferably applicable to gaseous fuel ovens |
-
2015
- 2015-07-05 PL PL413027A patent/PL232198B1/en unknown
-
2016
- 2016-06-30 WO PCT/PL2016/000074 patent/WO2017007355A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5839505A (en) * | 1996-07-26 | 1998-11-24 | Aaon, Inc. | Dimpled heat exchange tube |
US20020005275A1 (en) * | 1998-12-04 | 2002-01-17 | Beckett Gas. Inc. | Heat exchanger tube with integral restricting and turbulating structure |
EP1429085A1 (en) | 2002-12-10 | 2004-06-16 | Apen Group S.p.A. | Highly efficient heat exchanger and combustion chamber assembly for boilers and heated air generators |
EP2384837A2 (en) | 2010-05-03 | 2011-11-09 | Benteler Automobiltechnik GmbH | Heat exchanger and method for manufacturing a heat exchanger pipe |
WO2015059537A2 (en) * | 2013-10-11 | 2015-04-30 | Tecnoinox S.R.L. | Improved type of heat exchanger preferably applicable to gaseous fuel ovens |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11774179B2 (en) | 2017-06-22 | 2023-10-03 | Rheem Manufacturing Company | Heat exchanger tubes and tube assembly configurations |
US11073344B2 (en) | 2019-04-24 | 2021-07-27 | Rheem Manufacturing Company | Heat exchanger tubes |
Also Published As
Publication number | Publication date |
---|---|
PL232198B1 (en) | 2019-05-31 |
PL413027A1 (en) | 2017-01-16 |
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