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WO2002018861A1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
WO2002018861A1
WO2002018861A1 PCT/CH2001/000533 CH0100533W WO0218861A1 WO 2002018861 A1 WO2002018861 A1 WO 2002018861A1 CH 0100533 W CH0100533 W CH 0100533W WO 0218861 A1 WO0218861 A1 WO 0218861A1
Authority
WO
WIPO (PCT)
Prior art keywords
medium
heat exchanger
contact
contact surface
alternating
Prior art date
Application number
PCT/CH2001/000533
Other languages
German (de)
English (en)
Inventor
Regula MÜLLER
Original Assignee
Mueller Regula
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mueller Regula filed Critical Mueller Regula
Priority to AU2001281658A priority Critical patent/AU2001281658A1/en
Publication of WO2002018861A1 publication Critical patent/WO2002018861A1/fr

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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/16—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying an electrostatic field to the body of the heat-exchange medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers

Definitions

  • the invention relates to heat exchangers according to the preamble of claim 1.
  • Heat exchangers should enable the fastest possible and complete heat transfer between two media or fluids with different starting temperatures.
  • the two media come into contact with contact surfaces or contact walls.
  • the term heat exchanger is intended to encompass all heat-transferring devices, i.e. in addition to the heat exchangers in which one liquid medium is heated and the other liquid medium is cooled, for example also evaporators, cooling towers, finned heat exchangers and condensers. Accordingly, the media are heated or cooled at the contact surface and evaporated or condensed.
  • the common heat exchangers include the double tube heat exchanger, the tube bundle heat exchanger, the plate heat exchanger and the finned heat exchanger.
  • the wall of the inner tube forms a heat-conducting contact wall or contact surface, a first medium being guided within the inner tube and a second medium in the annular space between the wall of the inner and the wall of the outer tube.
  • Double tube heat exchangers are wound, for example, in a solenoid-shaped manner around an axis.
  • straight pipe sections are flowed through by one medium and surrounded by the other medium.
  • differently shaped, in particular U-shaped, pipe sections are also used.
  • the walls of the pipe sections form the contact surface.
  • the plates of the plate heat exchangers can have rectangular, square or even round outer edges and are connected to one another by screwing, soldering or welding. If alternately first and second plates are lined up, these can be designed such that first and second channels are alternately formed between the plates, which are connected via first and second connection areas to a first and a second connection opening in such a way that two completely separate ones Channel systems emerge.
  • the separating surfaces between the separate channel systems form the heat-conducting contact surfaces. chen or contact walls.
  • complex first and second channel systems may be used in accordance with WO97 / 45689.
  • Finned heat exchangers are used when the medium is gas or air.
  • the fins provide a large contact area with the air and allow the heat to flow to the channel system of the other medium or to its contact areas.
  • the slats are usually perpendicular to the main direction of a duct or pipe system.
  • heat is dissipated to the environment by bringing a hot medium, for example water, into contact with air, honeycomb packs being used to intensify the contact between these two media.
  • honeycomb packs being used to intensify the contact between these two media.
  • the surface of the honeycomb packets is the common contact area for both media. The contact surface therefore does not act as a separating surface but as an evaporation surface.
  • the homogeneous nucleation starts from the dissolved, supersaturated ions and occurs spontaneously.
  • nucleation takes place on suitable surfaces, in particular on the surface of the contact wall. Comparable to a catalyst, the foreign surface reduces the necessary activation energy and thus facilitates the nucleation process.
  • This heterogeneous nucleation on the contact surface leads to undesirable scaling, especially lime precipitation.
  • the heat transfer between the medium and the contact wall is significantly impaired by these limescale deposits on the contact surface.
  • the homogeneous nucleation does not impair the heat exchange because the germs are carried in the medium or in the water.
  • the formation of a nucleation requires energy. Grid energy is increasingly released when a germ is built up, but surface energy must also be used to form the new surface.
  • Heat exchangers that prevent rapid calcification of the contact surface due to reduced heterogeneous nucleation.
  • Heat exchangers are increasingly being used in domestic technology, for example transferring geothermal or solar heat from a storage cycle to an open process water flow.
  • no heavy deposits should occur on the contact surface, because such deposits hinder the heat transfer and because the frequent removal of the deposits is associated with an undesirable effort.
  • Minimal calcification solutions would improve the efficiency of open circuit heat exchangers where water evaporates from the contact surface. Efficient heat transfer is achieved during evaporation, but heavy deposits occur due to salting. If the calcification during evaporation can now be reduced, the fins of finned heat exchangers can be sprayed with water, for example, without the need for increased maintenance. The deposit problems with cooling tower solutions are reduced accordingly
  • the calcium carbonate can crystallize in different crystalline lattice structures (calcite, aragonite, vaterite).
  • the preferred crystal lattice depends on chemical boundary conditions (supersaturation, pH, relative proportion of the different ions and interfering ions, proportion of dispersed and colloidal material) and on physical boundary conditions (temperature, pressure, flow rate etc.) at the time of crystallization. Only calcite and aragonite are stable under normal pressure. Other modifications will convert to calcite after a period of time. Because kinetic factors, such as the reaction rate, play a significant role, it cannot be reliably derived from thermodynamics alone which crystal form is formed under the given conditions. In addition, impurities change seed formation and crystal growth.
  • inhibitors are used.
  • calcium carbonate precipitation phosphates, phosphorus compounds and ions of iron, zinc and magnesium are known inhibitors.
  • various solutions with static electrical fields, static magnetic fields, alternating electrical fields and also with alternating electromagnetic fields have been proposed. Despite large differences between the individual proposed solutions, it can be stated as a common observation that the supersaturated solutions can influence the kinetics of the crystallization process by suitable field effects.
  • a solution is known in which hard water is exposed to a stationary magnetic field before the heat exchange process.
  • a magnetic treatment device is used in a closed circuit in front of the heat exchanger. The water therefore flows first through this treatment device and then through the heat exchanger.
  • the heat exchanger is designed as a tube bundle, wherein an electrically or fluid heated by a combustion process is passed through the tube bundle and thereby releases heat through the tube walls acting as a contact surface to the water to be heated, which flows around the tube bundle.
  • the magnetic treatment device ensures that an angle in the range of 60 ° to 90 ° is formed between the flow direction and the magnetic field flow.
  • an acceleration of the ions perpendicular to the magnetic field vector and to the flow velocity vector is to be excited via the Lorentz force. Because this effect of the permanent magnetic field does not produce sufficiently good results, various solutions with alternating magnetic fields have also been described.
  • EP 0 406 622 describes a magnetic treatment device with a cylindrical housing, each of which has a connection opening on its two end faces and a coil in the region of the cylinder jacket for generating a magnetic field.
  • the Water to be treated flows through one connection opening into and through the other connection opening out of the housing.
  • the flow direction is redirected by two cross plates with staggered through openings, which increases the effective length of the flow path in the housing and achieves better magnet treatment.
  • the coil is controlled with an alternating current direction, with a currentless phase being provided between the supplied phases. As a result, the switching device for switching the current direction can be simplified and unnecessary kickback voltages would not occur.
  • EP 0 323 435 also describes a treatment device with a magnetic coil which generates a pulsating magnetic field in the passage of the liquid, the excitation frequency of the magnetic field being selectable from at least two possible frequency values.
  • the excitation frequencies should be between 70 and 500 kHz.
  • the residence time of the liquid in the magnetic field should be at least three complete change periods.
  • DE 197 04 747 assumes that the known solutions with magnetic fields with adjustable frequency and curve shape (DE-GBM 93 07 972.9, DE-GBM 93 08 302.5 and EP 0 357 102) as well as the solutions with baffles to increase the residence time of the water are built in the magnetic field (EP 0 406 622) unnecessarily complex.
  • an alternating electrical field that can be connected to the magnetic field should be provided.
  • the magnet treatment devices known from the prior art cited above can be arranged on the inlet side of pipe or supply line systems and seem to reduce the calcification noticeably. However, if they are used in front of a heat exchanger, the heterogeneous lime precipitation on its contact surface is not sufficiently small with a large temperature increase.
  • the invention is based on the object of finding a simple solution with which the calcification of the contact surface of a heat exchanger can be kept so small that its efficiency is ensured over a long period of time, or without frequent decalcification. This object is solved by the features of claim 1.
  • the dependent claims describe alternative or preferred embodiments.
  • the treatment of the at least one medium with an alternating electromagnetic field must at least partially take place in an area which adjoins the contact surface of the heat exchanger. This means that the medium must be exposed to an alternating electromagnetic field at the contact surface during the heating step.
  • the alternating field must also be effective in the area of the boundary layer.
  • the contact wall or the contact surface is preferably also detected by the electromagnetic field.
  • this boundary layer comprises water molecules, which are electrical dipoles.
  • the alternating electrical field stimulates movements of the water molecule dipoles, which on the one hand leads to a reduction in the boundary layer thickness and on the other hand also to a transfer of kinetic energy to the germs adhering to the contact surface. If the kinetic excitation is large enough, germs detach from the contact surface. Due to the smaller boundary layer thickness, the likelihood that detached germs from the boundary layer reach the turbulent area of the medium is increased. In the turbulent area, the germs are carried along until they exit the heat exchanger. In order to be able to strongly stimulate the dipole movements in the boundary layer, the electrical component of the electromagnetic field in the boundary layer must be as strong as possible.
  • the material of the contact wall, or its dielectric tensor is therefore selected such that the surface charge densities occurring on the contact surface are as large as possible.
  • the medium adjacent to the contact surface can also be selected such that these surface charge densities are as large as possible, but water should preferably be used.
  • a further detachment effect, which starts from free electrons, can be achieved via induced currents in the contact wall.
  • the contact wall is formed from an electrically conductive material, in particular steel, and the alternating magnetic field is aligned in such a way that induction voltages and corresponding induction currents can be excited in the contact wall.
  • induction currents start from free charges or electrons and act on the germs on the contact surface in the form of charge surges.
  • the electrical fields penetrate less and less deep into the conductive contact surface due to the skin effect, and the induction currents are thus formed directly on the surface of the contact wall.
  • the near-surface induction currents can transmit strong dynamic impulses to the germs adhering to the surface. These dynamic impulses can overcome the adhesive forces and detach the germs from the contact surface, thereby reducing the resulting heterogeneous development of germs on the contact surface.
  • the detachment of germs from the contact surface is an important effect, because even if the medium is only slightly heated at the contact surface, prior treatment of the medium with an electromagnetic field is not sufficient.
  • a heat exchanger was inserted into a circuit so that the medium which had already been warmed up was returned to the heat exchanger.
  • the medium is treated with a field before it enters the heat exchanger. Strong, homogeneous nucleation is thus stimulated in the circulating medium.
  • the medium with the high homogeneous germ content nevertheless leads to a strong deposit on the essentially equally warm contact surface.
  • the excitation of detachment in particular due to excited dipole movements in the medium, reduces the boundary layer thickness, which increases the heat transfer. increases and thus gives an additional advantage. It is therefore clear that in preferred solutions the effect of the electromagnetic field should not be limited to one medium. In the case of heat exchangers with two liquids guided on both sides of the contact surface, the electromagnetic field is built up in such a way that it is strong in both media and also in the contact wall, thereby reducing the boundary layer thickness.
  • a signal with steep edges shows high-frequency components in the spectrum.
  • the basic frequency of the signal can still be a few hearts.
  • Fig. 1 shows the negative logarithm of the solubility product of calcium carbonate
  • FIG. 2 shows a longitudinal section through a tube bundle heat exchanger with a schematically illustrated coil that surrounds it
  • FIG. 3 shows a perspective view of a double-tube heat exchanger with a coil enclosing it
  • FIG. 4a shows a side view of a solenoid-shaped double-tube heat exchanger with a schematically illustrated coil
  • FIG. 4b shows a top view of a solenoid-shaped double-tube heat exchanger with a schematically illustrated coil
  • 5 and 6 are perspective views of plate heat exchangers with a coil enclosing them
  • FIG. 7a shows a section AA according to FIG. 7b through a finned heat exchanger with a coil
  • Fig. 7b is a front view of a finned heat exchanger with a schematically illustrated coil
  • Fig. 8 is a schematic representation of a cooling tower with an open first
  • Circuit Fig. 9 is a schematic representation of a cooling tower with a closed first circuit
  • Fig. 2 shows a tube bundle heat exchanger 1 a with tubes 2 in a housing 3.
  • the tubes 2 form the contact wall with the contact surfaces 2a inwards to the first and outwards to the second medium.
  • the first medium to be heated arrives at the first connecting piece 4 in a distribution area 4a and from there via pipes 2, a forwarding area 4b and further pipes 2 to a collecting area 4c, from which the medium passes out of the heat exchanger 1a through a second connecting piece 5.
  • the second or hot medium passes through a third connection piece 6 into the interior of the housing 3 surrounding the tubes 2 and at the end through a fourth connection piece 7 out of the housing.
  • an alternating electromagnetic field is generated with a coil 8, which is operated by a feed device 9.
  • an alternating electromagnetic field can be applied to the first medium in the region of the contact surface 2a during at least part of the heating step.
  • the coil 8 encloses at least part of the contact surface 2a, so that this part of the contact surface 2a and the adjoining area for receiving the first medium and, preferably also a part of the contact area 2a with the adjoining area for receiving the second medium, the electromagnetic Alternating field inside the coil are exposed.
  • the feed device 9 provides a feed alternating current with steep flanks, in particular with an approximated rectangular function or with approximated Dirac surges, and is optionally comprised of thyristors for this purpose.
  • a further coil 8a with a feed device 9a is optionally arranged on the first connecting piece 4. Because the electromagnetic field of the coil 8 extends beyond the heat exchanger, the additional effect of the further coil 8a is usually not particularly great.
  • Fig. 3 shows an embodiment with a double tube heat exchanger 1 b, which is enclosed by a coil 8.
  • the coil is fed by a feed device 9.
  • a further coil 8 a is optionally also provided here on the inlet side of the medium to be heated.
  • 4a and 4b a solenoid-shaped double Pipe heat exchanger 1 c surrounded by a coil 8, the axis of the coil 8 being circular.
  • the contact surfaces 2a, 2b extend as closed surfaces around their longitudinal axes.
  • the alternating electromagnetic fields generated by the coils 8 have magnetic field vectors with a component in the direction of these axes, so that the flux changes in the alternating magnetic field in the case of contact walls made of conductive material produce ring currents in the contact walls.
  • the coils can also be arranged differently.
  • the axis of a cylindrical coil could extend parallel to the solenoid axis and the windings of the coil would run around the same as the windings of the solenoid-shaped double tube.
  • the electrical field has large portions perpendicular to the contact surface.
  • this is not as easy to achieve with tubular contact surfaces as with essentially flat contact surfaces.
  • it can generally be assumed that it is generally expedient if the main axis of the magnetic field or the center line of the coil is aligned essentially parallel to the contact surface or runs at a constant distance along the contact surface.
  • the center line of the coil must also be offset from the center lines of the tubular contact surfaces.
  • the axis of the coil is preferably arranged offset from the solenoid axis. If necessary, however, at least two coils are each assigned to a partial area of the heat exchanger. As a result, a sufficiently large electrical field component perpendicular to the contact surface can be achieved at least in partial areas of the tubular contact surfaces.
  • the orientation of the magnetic field or the arrangement of the coil 8 is adapted to the respective properties or to the geometry of the contact surface of the heat exchanger.
  • Figures 5 and 6 show plate heat exchangers in which the axis of the coil 8 is substantially perpendicular to the plate planes.
  • the device for generating an alternating electromagnetic field 8, 9 generates magnetic field vectors with a component in the direction of the surface normal of these planes, so that the flux changes in the alternating magnetic field excite maximum eddy currents in the contact walls. If fluctuations in the surface charge density at the contact surface that can be achieved via the electrical polarization are to be exploited, it is advantageous in plate heat exchangers if the main axis of the magnetic field is oriented essentially parallel to the contact surface.
  • the coil 8 would have to be arranged rotated by 90 ° about a vertical axis, starting from the orientation according to FIGS. 5 and 6. If both polarization and induction are to be used, it would also be appropriate to align the coil axis with a portion perpendicular and a portion parallel to the contact surface.
  • the influence of the electromagnetic field on the amount of deposits was quantified in experiments with a plate heat exchanger.
  • the plate heat exchanger was used in such a way that it heated domestic water to a temperature of 95 ° C with a medium with a temperature of 100 ° C. If no electromagnetic field was switched on, there was 205g lime in the plate heat exchanger after a water throughput of approx. 9m 3 . If an electromagnetic field was generated with the coil 8, there was only 110 g of lime in the plate heat exchanger after the same water throughput. A reduction in deposits by half enables maintenance-free operation to be extended to twice the time.
  • FIG. 7a shows a finned heat exchanger 1 e with a line system 10 to which fins 11 are fastened. The heat of the medium flowing in the line system 10 is to be released to the air 12 flowing through the fins 11. The lamella surfaces form the contact surface 2a.
  • water is sprayed with a spray system 13 onto the fins 11 or contact surface 2a, which evaporates there at least partially.
  • the axis of the coil is perpendicular to the planes of the lamellae 11. If the detachment of the heterogeneous germs is to be dominated not by induction currents but by polarization effects or surface charges, then the axis of the coil 8 is expediently parallel to the plane of the lamellae Align 1 1. If both effects are to be used, the axis of the coil 8 can also be aligned at an angle of 45 ° to these planes. In addition to the effect of the field generated by the coil 8, the medium in the line system 10 or the water in the spray system 13 can also be treated with an electromagnetic field by further coils 8a.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

L'invention concerne un échangeur de chaleur (1a) présentant au moins une paroi de contact (2) dont la première surface constitue la surface de contact (2a) avec un premier milieu. En contact avec un deuxième milieu, cette paroi de contact (2) absorbe la chaleur dudit milieu et transfert cette chaleur vers le premier milieu pendant une phase de chauffage par l'intermédiaire de la surface de contact (2a). Afin de limiter l'apparition de dépôts sur la paroi de contact (2), cet échangeur de chaleur (1a) comprend un dispositif pour la production d'un champ alternatif électromagnétique. Ce dispositif, qui comporte une bobine (8) et un dispositif d'alimentation (9), produit un champ alternatif électromagnétique dans le premier milieu au niveau de la surface de contact (2a) pendant au moins une partie de la phase de chauffage. La génération électromagnétique de germes dans un milieu à chauffer avant son entrée (4) dans un échangeur de chaleur (1a) ne suffisant pas, la formation de germes doit être stimulée, là où son apparition est la plus probable ou le degré de sursaturation est le plus élevé, c'est-à-dire près de la surface de contact conductrice de chaleur (2a).
PCT/CH2001/000533 2000-08-28 2001-08-22 Echangeur de chaleur WO2002018861A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001281658A AU2001281658A1 (en) 2000-08-28 2001-08-22 Heat exchanger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1675/00 2000-08-28
CH16752000 2000-08-28

Publications (1)

Publication Number Publication Date
WO2002018861A1 true WO2002018861A1 (fr) 2002-03-07

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AU (1) AU2001281658A1 (fr)
WO (1) WO2002018861A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015218512A1 (de) 2015-09-25 2017-03-30 Mtu Friedrichshafen Gmbh Wärmetauschereinrichtung für eine Brennkraftmaschine, Brennkraftmaschine mit einer solchen Wärmetauschereinrichtung, und Schifffahrzeug mit einer Brennkraftmaschine und/oder einer Wärmetauschereinrichtung

Citations (14)

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Publication number Priority date Publication date Assignee Title
SU840667A1 (ru) * 1979-05-24 1981-06-23 Харьковское Высшее Военное Командноеучилище Им. Маршала Советского Союзакрылова H.И. Теплова труба
US4366857A (en) * 1981-04-28 1983-01-04 The United States Of America As Represented By The Secretary Of The Air Force Magnetic two-phase thermosiphon
JPS61186784A (ja) * 1985-02-15 1986-08-20 Matsushita Electric Works Ltd ヒ−トパイプ
EP0323435A2 (fr) 1987-12-27 1989-07-05 Interpat Ag Procédé et dispositif pour le traitement des liquides avec un champ magnétique pulsatif
EP0357102A2 (fr) 1988-09-02 1990-03-07 Jan Pieter De Baat Doelman Appareil pour le traitement des liquides afin d'empêcher et/ou d'enlever des dépôts de tartre
EP0406622A2 (fr) 1989-07-04 1991-01-09 Elfriede Schulze Dispositif pour l'élimination et la prévention de la formation du tartre
US5056593A (en) * 1983-03-31 1991-10-15 Hull Francis R Dehumidifying heat exchanger apparatus
US5149438A (en) 1990-06-18 1992-09-22 Hebert Claude L Method for magnetically treating water in a closed loop heat transfer system
DE9307972U1 (de) 1993-05-26 1993-09-09 Reika Electronic Karin Walch, 64546 Mörfelden-Walldorf Entkalkungsvorrichtung
FR2697537A1 (fr) * 1992-10-29 1994-05-06 Bouillon Claude Traitement des liquides par induction électromagnétique.
DE9308302U1 (de) 1993-06-03 1994-10-13 Tracon Trading & Consulting GmbH, 22395 Hamburg Vorrichtung zur Behandlung eines wasserhaltigen Fluids, wie kalkhaltigem Leitungswasser
JPH0842993A (ja) * 1994-08-01 1996-02-16 S K A Kk スケールの除去・防止装置
WO1997045689A1 (fr) 1996-05-24 1997-12-04 Nek Umwelttechnik Ag Echangeur de chaleur a plaques
DE19704747A1 (de) 1997-02-08 1998-08-13 Heinz Dieter Dorka Anlage und Verfahren zur Wasseraufbereitung

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Publication number Priority date Publication date Assignee Title
SU840667A1 (ru) * 1979-05-24 1981-06-23 Харьковское Высшее Военное Командноеучилище Им. Маршала Советского Союзакрылова H.И. Теплова труба
US4366857A (en) * 1981-04-28 1983-01-04 The United States Of America As Represented By The Secretary Of The Air Force Magnetic two-phase thermosiphon
US5056593A (en) * 1983-03-31 1991-10-15 Hull Francis R Dehumidifying heat exchanger apparatus
JPS61186784A (ja) * 1985-02-15 1986-08-20 Matsushita Electric Works Ltd ヒ−トパイプ
EP0323435A2 (fr) 1987-12-27 1989-07-05 Interpat Ag Procédé et dispositif pour le traitement des liquides avec un champ magnétique pulsatif
EP0357102A2 (fr) 1988-09-02 1990-03-07 Jan Pieter De Baat Doelman Appareil pour le traitement des liquides afin d'empêcher et/ou d'enlever des dépôts de tartre
EP0406622A2 (fr) 1989-07-04 1991-01-09 Elfriede Schulze Dispositif pour l'élimination et la prévention de la formation du tartre
US5149438A (en) 1990-06-18 1992-09-22 Hebert Claude L Method for magnetically treating water in a closed loop heat transfer system
FR2697537A1 (fr) * 1992-10-29 1994-05-06 Bouillon Claude Traitement des liquides par induction électromagnétique.
DE9307972U1 (de) 1993-05-26 1993-09-09 Reika Electronic Karin Walch, 64546 Mörfelden-Walldorf Entkalkungsvorrichtung
DE9308302U1 (de) 1993-06-03 1994-10-13 Tracon Trading & Consulting GmbH, 22395 Hamburg Vorrichtung zur Behandlung eines wasserhaltigen Fluids, wie kalkhaltigem Leitungswasser
JPH0842993A (ja) * 1994-08-01 1996-02-16 S K A Kk スケールの除去・防止装置
WO1997045689A1 (fr) 1996-05-24 1997-12-04 Nek Umwelttechnik Ag Echangeur de chaleur a plaques
DE19704747A1 (de) 1997-02-08 1998-08-13 Heinz Dieter Dorka Anlage und Verfahren zur Wasseraufbereitung

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Title
DATABASE WPI Section Ch Week 198216, Derwent World Patents Index; Class J08, AN 1982-32716E, XP002185499 *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 010 (M - 552) 10 January 1987 (1987-01-10) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 06 28 June 1996 (1996-06-28) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015218512A1 (de) 2015-09-25 2017-03-30 Mtu Friedrichshafen Gmbh Wärmetauschereinrichtung für eine Brennkraftmaschine, Brennkraftmaschine mit einer solchen Wärmetauschereinrichtung, und Schifffahrzeug mit einer Brennkraftmaschine und/oder einer Wärmetauschereinrichtung
WO2017050433A1 (fr) 2015-09-25 2017-03-30 Mtu Friedrichshafen Gmbh Dispositif échangeur de chaleur pour un moteur à combustion interne, moteur à combustion interne pourvu dudit dispositif échangeur de chaleur, et bateau pourvu d'un moteur à combustion interne et/ou d'un dispositif échangeur de chaleur

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