WO2004058430A2 - Verfahren zur herstellung von aus halbrohren oder rohren bestehenden wärmetauscherrohren für rekuperativ-abgaswärmetauscher - Google Patents
Verfahren zur herstellung von aus halbrohren oder rohren bestehenden wärmetauscherrohren für rekuperativ-abgaswärmetauscher Download PDFInfo
- Publication number
- WO2004058430A2 WO2004058430A2 PCT/DE2003/003917 DE0303917W WO2004058430A2 WO 2004058430 A2 WO2004058430 A2 WO 2004058430A2 DE 0303917 W DE0303917 W DE 0303917W WO 2004058430 A2 WO2004058430 A2 WO 2004058430A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tubes
- pipes
- heat exchanger
- openings
- molded
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/06—Fastening; Joining by welding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49389—Header or manifold making
Definitions
- the invention relates to a process for the production of half pipes or pipes with a plurality of openings penetrating their outer surface made of a metallic, high-temperature-resistant material for providing heat exchanger pipes for recuperative exhaust gas heat exchangers and half pipes / pipes according to this process.
- the recuperative exhaust gas heat exchangers used in gas turbine engines essentially comprise, in addition to a heat exchanger housing, essentially a distributor pipe for supplying the "cold" air conveyed by a compressor into a so-called cross-counterflow matrix around which the hot turbine exhaust gas flows and a collector pipe for removing the now heated “hot ones” "Compressed air to a suitable consumer, e.g. B. the combustion chamber of the gas turbine engine.
- a suitable consumer e.g. B. the combustion chamber of the gas turbine engine.
- the manifold as well as the manifold are also referred to simply as heat exchanger tubes.
- the air is fed from the distributor pipe into the cross-countercurrent matrix or the air is discharged from the cross-countercurrent matrix into the collecting pipe via a large number of openings made in the outer surface of the heat exchanger pipes.
- the cross-countercurrent matrix in turn comprises a multiplicity of elliptical lancets or tubes combined to form a tube bundle.
- the tube bundle is arranged on the side of the heat exchanger tubes arranged in parallel, projecting in a U-shape, the ends of each tube of the tube bundle corresponding in each case with an opening made in the outer surface of the heat exchanger tubes.
- a large number of lancets and thus a large number of openings / holes in the outer surface of the heat exchanger tubes are required.
- the heat exchanger tubes which consist of a heat-resistant material, have so far been composed of forged half tubes.
- the joining of two half pipes to a heat exchanger tube is done by welding, the lancets are attached to the heat exchanger tubes by means of high temperature soldering.
- rows of holes with 184 openings each are provided in 19 circumferential positions, so that a total of 3,496 openings result in the lateral surface per half pipe.
- 4 x 3,496 13,984 holes / openings are therefore required in the outer surface of the half tubes.
- EDM Electro-Discharge-Machining
- the EDM process has another disadvantage. Due to the procedural procedure for introducing the openings into the lateral surface of the heat exchanger tubes, the so-called recast layers result in the area of the perforated walls on the workpieces. These have to be removed before the subsequent high-temperature soldering for the soldering of the lancets into the half-tubes, which proves to be disadvantageous and difficult.
- the narrow soldering gaps and small tolerances (+/- 0.05mm) required for high-temperature soldering are often not achievable with existing recast layers for reasons of economy (slow, fine processing stage required).
- Electrochemical machining is another option for creating the openings in the lateral surface of the half-tubes.
- ECM Electrochemical machining
- this process requires high construction and tooling costs and has capital-intensive equipment costs.
- the electrolyte in this process is typically an oxidizer, such as sodium nitrate or sodium chlorate, a health and safety risk, and the by-products of the process are classified as hazardous waste.
- the object of the invention is to remedy this situation by a method for producing such half-tubes or tubes with a plurality of openings penetrating their outer surface made of a metallic, high-temperature-resistant material, which is without the disadvantages of the previously used methods.
- This object is achieved according to the invention in that the semi-tubes or tubes are manufactured as high-precision investment castings using an investment casting process.
- Such an investment casting process has the advantage that it agrees high reproducibility with consistently high quality at low manufacturing costs.
- the melt is poured into the mold shell without reactive gases, in particular under vacuum, an inert gas atmosphere or the like.
- the melt is poured into hot mold shells using vacuum or inert gas overpressure.
- a nickel-based alloy, in particular IN 625, is preferably used as the highly heat-resistant material for the fine casting process.
- the openings penetrating the lateral surface are elliptical. forms.
- the half diameter of the half pipes / tubes is 62.5 or 37.5 mm, the length of the half pipes is 500 mm or 750-900 mm.
- Fig. 2 is a detailed view of a heat exchanger tube
- Fig. 3 shows the structure of the heat exchanger tube according to FIG. 2 from half tubes.
- a recuperative exhaust gas heat exchanger of a gas turbine engine (not shown here), designated overall by reference number 10 in FIG. 1, essentially comprises a distributor pipe 12, a collector pipe 14 arranged parallel thereto, and a cross-counterflow matrix 16 projecting laterally in a U-shaped manner and manifold 14 will be referred to as heat exchanger tubes in the further course.
- the cross-countercurrent matrix 16 has a multiplicity of elliptical tubes or lancets 18.
- the lancets 18 are each attached to the distributor and manifold 12, 14. They correspond to the openings / holes 22 made for this purpose in the outer surface of the distributor and collecting pipe 12, 14, which are not visible in " this illustration, cf. FIG. 2.
- recuperative exhaust gas heat exchanger The operation of the recuperative exhaust gas heat exchanger described above is as follows: Cold compressed air is supplied to the distributor pipe 12 by a compressor according to the arrow D. The cold compressed air flows from the manifold 12 through the openings / holes made in the lateral surface into the laterally U-shaped cross-countercurrent flow matrix 16 cold compressor air. After flowing through the cross-countercurrent matrix 16 and feeding into the manifold 14, the now heated air is a suitable consumer, for. B. fed to the combustion chamber.
- FIG. 2 shows an enlarged view of a detailed view of a perforated heat exchanger tube 12/14 of the recuperative exhaust gas heat exchanger 10.
- the heat exchanger tube 12/14 has a plurality of openings 22 which penetrate its outer surface 20.
- the openings 22 are elliptical. Out of this large number of openings 22 in the outer surface 20, only a few of the openings 22 penetrating the outer surface 20 of the heat exchanger tube 12/14 are shown here for reasons of clarity.
- the heat exchanger tube 12/14 is composed in this example of a first half tube 24 and a second half tube 26.
- the two half tubes 24, 26 are joined together by fusion welding, and the lancets are attached in a known manner by means of high-temperature soldering.
- a finely structured, dimensionally accurate model of the half-tubes 24, 26, including that of the outer surface, which can be destroyed by heat, is first used 20 penetrating openings 22 made. Wax is used as the model material.
- the wax model including the wax sprue system, is given a molded shell by immersing it in ceramic coating materials and then sanding it with cast ceramic. To ensure the stability of the molded shell, the automated process of immersion and subsequent sanding is repeated several times.
- the resulting one-piece molded shells are fired, which gives them their fire resistance.
- the melt is then poured into hot mold shells using vacuum or excess pressure with inert gas.
- the cast half-tubes 24, 26 are then to be cleaned, the sprues also having to be removed.
- a finishing of the openings 22 penetrating the outer surface 20 by blasting with erosive blasting media or by a “finishing operation” using EDM electro-discharge-machining
- EDM electro-discharge-machining
- the assembly of two such half-tubes 24, 26 to form a heat exchanger tube 12/14 takes place via a likewise known fusion welding process.
- the lancets made of IN 625 are inserted into the elliptical openings after automatic assembly and soldering with solder paste by vacuum high-temperature soldering.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0514643A GB2411855B (en) | 2002-12-21 | 2003-11-26 | Process for the production of heat exchanger tubes consisting of half-tubes or tubes, for recuperative waste gas heat exchangers |
US10/540,226 US20060137869A1 (en) | 2002-12-21 | 2003-11-26 | Method for producing heat exchanger tubes, which consist of half-tubes or complete tubes and which are provided for recuperative exhaust gas heat exchanger |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10260535.1 | 2002-12-21 | ||
DE10260535A DE10260535A1 (de) | 2002-12-21 | 2002-12-21 | Verfahren zur Herstellung von aus Halbrohren oder Rohren bestehenden Wärmetauscherrohren für Rekuperativ-Abgaswärmetauscher |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004058430A2 true WO2004058430A2 (de) | 2004-07-15 |
WO2004058430A3 WO2004058430A3 (de) | 2004-10-14 |
Family
ID=32477918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/003917 WO2004058430A2 (de) | 2002-12-21 | 2003-11-26 | Verfahren zur herstellung von aus halbrohren oder rohren bestehenden wärmetauscherrohren für rekuperativ-abgaswärmetauscher |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060137869A1 (de) |
DE (1) | DE10260535A1 (de) |
GB (1) | GB2411855B (de) |
WO (1) | WO2004058430A2 (de) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8177932B2 (en) * | 2009-02-27 | 2012-05-15 | International Mezzo Technologies, Inc. | Method for manufacturing a micro tube heat exchanger |
US10094219B2 (en) | 2010-03-04 | 2018-10-09 | X Development Llc | Adiabatic salt energy storage |
WO2014052927A1 (en) | 2012-09-27 | 2014-04-03 | Gigawatt Day Storage Systems, Inc. | Systems and methods for energy storage and retrieval |
CN103071981A (zh) * | 2013-01-29 | 2013-05-01 | 浙江方宏空调设备有限公司 | 金属管管壁外凸孔径制造方法 |
US10233787B2 (en) | 2016-12-28 | 2019-03-19 | Malta Inc. | Storage of excess heat in cold side of heat engine |
US10458284B2 (en) | 2016-12-28 | 2019-10-29 | Malta Inc. | Variable pressure inventory control of closed cycle system with a high pressure tank and an intermediate pressure tank |
US10233833B2 (en) | 2016-12-28 | 2019-03-19 | Malta Inc. | Pump control of closed cycle power generation system |
US11053847B2 (en) | 2016-12-28 | 2021-07-06 | Malta Inc. | Baffled thermoclines in thermodynamic cycle systems |
US10082045B2 (en) | 2016-12-28 | 2018-09-25 | X Development Llc | Use of regenerator in thermodynamic cycle system |
US10280804B2 (en) | 2016-12-29 | 2019-05-07 | Malta Inc. | Thermocline arrays |
US20180185942A1 (en) * | 2016-12-29 | 2018-07-05 | X Development Llc | High Temperature Casting and Electrochemical Machining Heat Exchanger Manufacturing Method |
US10221775B2 (en) | 2016-12-29 | 2019-03-05 | Malta Inc. | Use of external air for closed cycle inventory control |
US10801404B2 (en) | 2016-12-30 | 2020-10-13 | Malta Inc. | Variable pressure turbine |
US10082104B2 (en) | 2016-12-30 | 2018-09-25 | X Development Llc | Atmospheric storage and transfer of thermal energy |
US10436109B2 (en) | 2016-12-31 | 2019-10-08 | Malta Inc. | Modular thermal storage |
US10551131B2 (en) * | 2018-01-08 | 2020-02-04 | Hamilton Sundstrand Corporation | Method for manufacturing a curved heat exchanger using wedge shaped segments |
CA3088184A1 (en) | 2018-01-11 | 2019-07-18 | Lancium Llc | Method and system for dynamic power delivery to a flexible datacenter using unutilized energy sources |
CN115485459A (zh) | 2019-11-16 | 2022-12-16 | 马耳他股份有限公司 | 泵送热电储存系统 |
US11454167B1 (en) | 2020-08-12 | 2022-09-27 | Malta Inc. | Pumped heat energy storage system with hot-side thermal integration |
EP4193041A1 (de) | 2020-08-12 | 2023-06-14 | Malta Inc. | Gepumptes wärmeenergiespeichersystem mit fernwärmeintegration |
US11286804B2 (en) | 2020-08-12 | 2022-03-29 | Malta Inc. | Pumped heat energy storage system with charge cycle thermal integration |
US11486305B2 (en) | 2020-08-12 | 2022-11-01 | Malta Inc. | Pumped heat energy storage system with load following |
US11480067B2 (en) | 2020-08-12 | 2022-10-25 | Malta Inc. | Pumped heat energy storage system with generation cycle thermal integration |
US11396826B2 (en) | 2020-08-12 | 2022-07-26 | Malta Inc. | Pumped heat energy storage system with electric heating integration |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US4321010A (en) * | 1978-08-17 | 1982-03-23 | Rolls-Royce Limited | Aerofoil member for a gas turbine engine |
EP0331026A2 (de) * | 1988-03-04 | 1989-09-06 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Verfahren zur Herstellung eines Wärmetauscherblockes sowie Vorrichtung zur Durchführung des Verfahrens |
JPH11221650A (ja) * | 1998-02-06 | 1999-08-17 | Noriatsu Kojima | 長円形管用消失模型およびこれを用いた長円形管 |
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US3895672A (en) * | 1973-12-26 | 1975-07-22 | United Aircraft Corp | Integrated furnace method and apparatus for the continuous production of individual castings |
US4223716A (en) * | 1978-12-04 | 1980-09-23 | Caterpillar Tractor Co. | Method of making and using a ceramic shell mold |
US4589478A (en) * | 1985-08-19 | 1986-05-20 | United Aircraft Products, Inc. | Pressure protected tubular heat exchanger |
GB8712742D0 (en) * | 1987-05-30 | 1987-07-01 | Ae Plc | Metal casting |
DE4134066A1 (de) * | 1991-10-15 | 1993-04-22 | Thyssen Guss Ag | Verfahren zur herstellung von kleinen und kleinsten kanaelen in formgussteilen |
US5299619A (en) * | 1992-12-30 | 1994-04-05 | Hitchiner Manufacturing Co., Inc. | Method and apparatus for making intermetallic castings |
DE4316333C1 (de) * | 1993-05-15 | 1994-09-15 | Mtu Friedrichshafen Gmbh | Abgasleitung |
AU708428B2 (en) * | 1995-06-07 | 1999-08-05 | Depuy Orthopaedics, Inc. | Investment casting method yielding cast articles with enhanced surface finish |
DE19628762A1 (de) * | 1996-07-17 | 1998-01-22 | Porsche Ag | Kühlkreislauf einer Brennkraftmaschine |
-
2002
- 2002-12-21 DE DE10260535A patent/DE10260535A1/de not_active Ceased
-
2003
- 2003-11-26 GB GB0514643A patent/GB2411855B/en not_active Expired - Fee Related
- 2003-11-26 WO PCT/DE2003/003917 patent/WO2004058430A2/de active Application Filing
- 2003-11-26 US US10/540,226 patent/US20060137869A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4321010A (en) * | 1978-08-17 | 1982-03-23 | Rolls-Royce Limited | Aerofoil member for a gas turbine engine |
EP0331026A2 (de) * | 1988-03-04 | 1989-09-06 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Verfahren zur Herstellung eines Wärmetauscherblockes sowie Vorrichtung zur Durchführung des Verfahrens |
JPH11221650A (ja) * | 1998-02-06 | 1999-08-17 | Noriatsu Kojima | 長円形管用消失模型およびこれを用いた長円形管 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN Bd. 1999, Nr. 13, 30. November 1999 (1999-11-30) & JP 11 221650 A (KOJIMA NORIATSU), 17. August 1999 (1999-08-17) * |
Also Published As
Publication number | Publication date |
---|---|
GB2411855B (en) | 2006-02-08 |
GB2411855A (en) | 2005-09-14 |
US20060137869A1 (en) | 2006-06-29 |
DE10260535A1 (de) | 2004-07-08 |
GB0514643D0 (en) | 2005-08-24 |
WO2004058430A3 (de) | 2004-10-14 |
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