EP0212473A2 - Heat pipe controlled by pressure - Google Patents

Heat pipe controlled by pressure Download PDF

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Publication number
EP0212473A2
EP0212473A2 EP86110933A EP86110933A EP0212473A2 EP 0212473 A2 EP0212473 A2 EP 0212473A2 EP 86110933 A EP86110933 A EP 86110933A EP 86110933 A EP86110933 A EP 86110933A EP 0212473 A2 EP0212473 A2 EP 0212473A2
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EP
European Patent Office
Prior art keywords
heat
heat pipe
transfer medium
displacement body
cooling zone
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Granted
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EP86110933A
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German (de)
French (fr)
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EP0212473A3 (en
EP0212473B1 (en
Inventor
Carlo Bassani
Claus A.O. Busse
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European Atomic Energy Community Euratom
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European Atomic Energy Community Euratom
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    • 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
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/06—Control arrangements therefor
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/132—Heat exchange with adjustor for heat flow
    • Y10S165/133—Conduction rate

Definitions

  • the invention relates to a pressure-controlled heat pipe, consisting of a closed vessel containing a heat transfer medium with a heat source at which the heat transfer medium evaporates, and a heat sink in the form of a cooling zone, with a non-condensable inert gas at a controllable pressure in the vessel at the upper end of the cooling zone is feedable.
  • Pressure controlled heat pipes are e.g. known from the journal "Heat and mass transfer", Volume 19, 1985, pages 67 to 71.
  • the temperature of such heat pipes is influenced by the size of an inert gas plug in the cooling zone. If you want to raise the temperature of the heating furnace, you increase the inert gas pressure, which reduces the cooled area of the cooling zone that can be reached by the heat transfer medium.
  • the object of the invention is to improve a heat pipe of the type mentioned so that solid deposits can no longer occur in the cooling zone, even if the inert gas pressure is changed quickly for control purposes.
  • This object is achieved according to the invention in that from the upper end of the cooling zone along the central region of this zone a thermally conductive displacement body protrudes downwards and that this displacement body carries baffles at least in its upper part, which separate the space between the cooled wall and the displacement body Divide a variety of interconnected volumes.
  • the baffles are preferably designed as spiral ribs.
  • spiral ribs serve on the one hand to extend the path, the condensate droplets have to take on their way up, so that they no longer come to the coldest area of the cooling wall, and on the other hand to the convection flow of the inert gas in the axial area of the To hinder the cooling zone.
  • the displacement body contributes to achieving the object on which the invention is based by firstly occupying the axial region of the cooling zone and thus deflecting condensate droplets early towards the cooled wall, and secondly by opening the axial region of the cooling zone above the steam zone maintains a high temperature at which solid deposits are not possible.
  • the spiral ribs are preferably inclined outward in a roof shape, so that condensate can flow outwards by gravity towards the chimney wall.
  • spiral ribs are designed as a single-start screw. It would also be possible, for example, to interrupt the rib structure and to form at least two single-start screws lying one behind the other, one of which could be, for example, right-handed and the other left-handed, or one of which has a larger screw thread than the other.
  • the heat pipe furnace shown in Fig. 1 consists of a double-walled horizontal heat pipe 1 which coaxially surrounds a furnace channel 2.
  • a heat transfer medium for example water, cesium or sodium, which evaporates at a heat source 3 and condenses at a heat sink 4.
  • the heat source is formed, for example, by a resistance heater, which is inserted into an insulation 5 surrounding the heat pipe 1 and which heats the heat pipe from the outside.
  • the heat sink 4 is formed by a chimney which is connected to the heat pipe and protrudes from the insulation 5 at the top.
  • the outer wall of the chimney is cooled in the upper region, for example with the aid of water cooling 6.
  • an inert gas plug 8 By suitable choice of the helium pressure, the boundary layer 9 between the vaporous heat transfer medium in the heat pipe 1 and the Inert gas plugs are moved vertically so that a more or less large area of the cooled wall is available as a heat sink for the heat transfer medium.
  • the helium is fed in by a control circuit, not shown, which orients the temperature in the furnace 2 at a desired temperature.
  • Fig. 2 shows an enlarged view of the upper end of the chimney 4 with the water cooling 6 and the boundary layer 9 between the inert gas plug 8 and the steam of the heat transfer medium.
  • a displacement body 11 which consists of a highly thermally conductive metal, projects axially into this chimney from above by a cover 7. The displacement body extends below the minimum level of the boundary layer 9, so that its tip is always immersed in the vaporous heat transfer medium.
  • the upper half of this displacement body carries spiral ribs 12 which extend almost to the wall of the chimney provided with capillary grooves 13.
  • the fireplace insert according to the invention deflects the droplets laterally and reduces convection effects, since the steam particles are forced outward from the axial area towards the cooled chimney wall at an early stage.
  • the displacer 11 the lower end of which is immersed in the hot steam of the heat transfer medium, keeps the spiral ribs at a high temperature in relation to the wall, so that there is no fear of solid deposits which could render the furnace unusable.
  • the fireplace insert according to the invention also brings safety advantages in the event of an accident in which the helium supply line breaks.
  • the then rising steam flow of the heat transfer medium must pass through the entire spiral before it can escape through the broken helium line.
  • the insert acts as a condensation trap and prevents the heat transfer medium from escaping.
  • the heat pipe can also have a shape other than that of a double-walled coaxial pipe.
  • the heat pipe does not need to be horizontal, but can also be inclined or vertical. While it is important in a horizontal heat pipe assembly that all inner walls are provided with capillary structures so that all walls are always wetted with liquid heat transfer medium, with vertical assembly the wetting could also be done by gravity alone without capillary structures.
  • the chimney could also be placed at an angle on the heat pipe if only it was ensured that it was higher than the latter.
  • spiral ribs could be replaced by internally shaped internals, e.g. through pagoda-like deflector plates, which act as chicanes for the steam flow and also divide the annular space between the displacement body and the cooled wall into numerous interconnected partial volumes.
  • the spiral screw can also be designed as a multi-start screw, which can have a greater pitch than a single-start screw, without the individual partial volumes being increased thereby.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Pipeline Systems (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

Die Erfindung betrifft ein druckgesteuertes Wärmerohr, bestehend aus einem ein Wärmeträgermedium enthaltenden geschlossenen Gefäß mit einer Wärmequelle, an der das Wärmeträgermedium verdampft, und einer Wärmesenke in Form einer Kühlzone, wobei am oberen Ende dieser Zone ein nichtkondensierbares Inertgas unter regelbarem Druck in das Gefäß einspeisbar ist. Erfindungsgemäß ragt vom oberen Ende der Kühlzone ein gut wärmeleitender Verdrängungskörper (11) nach unten, der zumindest in seinem oberen Teil Ablenkbleche (12) trägt, die den Zwischenraum zwischen dem Verdrängungskörper und der gekühlten Wand der Kühlzone in eine Vielzahl von miteinander in Verbindung stehenden Volumen unterteilen.The invention relates to a pressure-controlled heat pipe, consisting of a closed vessel containing a heat transfer medium with a heat source at which the heat transfer medium evaporates, and a heat sink in the form of a cooling zone, a non-condensable inert gas being able to be fed into the vessel under controllable pressure at the upper end of this zone . According to the invention, a good heat-conducting displacement body (11) projects downward from the upper end of the cooling zone and bears at least in its upper part baffles (12) which divide the space between the displacement body and the cooled wall of the cooling zone into a large number of interconnected volumes divide.

Description

Die Erfindung bezieht sich auf ein druckgesteuertes Wärme­rohr, bestehend aus einem ein Wärmeträgermedium enthaltenden geschlossenen Gefäß mit einer Wärmequelle, an der das Wärme­trägermedium verdampft, und einer Wärmesenke in Form einer Kühlzone, wobei am oberen Ende der Kühlzone ein nichtkonden­sierbares Inertgas unter regelbarem Druck in das Gefäß ein­speisbar ist.The invention relates to a pressure-controlled heat pipe, consisting of a closed vessel containing a heat transfer medium with a heat source at which the heat transfer medium evaporates, and a heat sink in the form of a cooling zone, with a non-condensable inert gas at a controllable pressure in the vessel at the upper end of the cooling zone is feedable.

Druckgesteuerte Wärmerohre sind z.B. aus der Zeitschrift "Wärme- und Stoffübertragung", Band 19, 1985, Seiten 67 bis 71 bekannt. Die Temperatur solcher Wärmerohre wird durch die Größe eines Inertgasstopfens in der Kühlzone beeinflußt. Will man die Temperatur des Wärmeofens anheben, dann steigert man den Inertgasdruck, wodurch die vom Wärmeträgermedium erreichbare gekühlte Fläche der Kühlzone verringert wird.Pressure controlled heat pipes are e.g. known from the journal "Heat and mass transfer", Volume 19, 1985, pages 67 to 71. The temperature of such heat pipes is influenced by the size of an inert gas plug in the cooling zone. If you want to raise the temperature of the heating furnace, you increase the inert gas pressure, which reduces the cooled area of the cooling zone that can be reached by the heat transfer medium.

Besonders bei niedrigen Betriebsdrücken hat sich gezeigt, daß sich an der Grenzfläche zwischen dem dampfförmigen Wärmeträger­medium und dem Inertgas in der Kühlzone eine Nebelzone aus­bildet und daß Dampftröpfchen weit in den Bereich des Inert­gasstopfens nach oben gerissen werden. Es kann dann passieren, daß der Dampf an der wesentlich kühleren Wand im Bereich des Inertgasstopfens nicht nur kondensiert, sondern sogar als fester Stoff abgelagert wird. Dieser Effekt wird noch verstärkt durch die natürliche Konvektion des Edelgases, das im Axialbereich der Kühlzone aufsteigt und im kühleren Wandbereich wieder nach unten fällt.Particularly at low operating pressures, it has been shown that a mist zone forms at the interface between the vaporous heat transfer medium and the inert gas in the cooling zone and that steam droplets are torn far up into the area of the inert gas plug. It can then happen that the steam not only condenses on the much cooler wall in the area of the inert gas pot, but is even deposited as a solid substance. This effect is reinforced by the natural convection of the noble gas, which rises in the axial area of the cooling zone and falls down again in the cooler wall area.

Besonders groß ist diese Gefahr während eines Regelübergangs des Wärmerohrs auf niedrigere Temperatur, da dann ein Teil des Inertgases abgezogen wird.This risk is particularly great during a control transition of the heat pipe to a lower temperature, since part of the inert gas is then drawn off.

Aufgabe der Erfindung ist es, ein Wärmerohr der eingangs ge­nannten Art so zu verbessern, daß Feststoffablagerungen in der Kühlzone nicht mehr auftreten können, und zwar selbst dann nicht, wenn der Inertgasdruck zu Regelzwecken rasch geändert wird.The object of the invention is to improve a heat pipe of the type mentioned so that solid deposits can no longer occur in the cooling zone, even if the inert gas pressure is changed quickly for control purposes.

Diese Aufgabe wird erfindungsgenäß dadurch gelöst, daß vom obe­ren Ende der Kühlzone entlang des zentralen Bereichs dieser Zone ein gut wärmeleitender Verdrängungskörper nach unten ragt und daß dieser Verdrängungskörper zumindest in seinem oberen Teil Ablenkbleche trägt, die den Zwischenraum zwischen der gekühlten Wand und dem Verdrängungskörper in eine Vielzahl von miteinander in Verbindung stehenden Volumen unterteilen. Vorzugsweise sind die Ablenkbleche als Spiralrippen ausgebildet.This object is achieved according to the invention in that from the upper end of the cooling zone along the central region of this zone a thermally conductive displacement body protrudes downwards and that this displacement body carries baffles at least in its upper part, which separate the space between the cooled wall and the displacement body Divide a variety of interconnected volumes. The baffles are preferably designed as spiral ribs.

Die Spiralrippen dienen zum einen dazu, den Weg zu verlängern, den Kondensattröpfchen auf ihrem Weg nach oben nehmen müssen, so daß sie gar nicht mehr bis in den kältesten Bereich der Kühlwand kommen, und zum anderen dazu, die Konvektionsströmung des Inertgases im axialen Bereich der Kühlzone zu behindern.The spiral ribs serve on the one hand to extend the path, the condensate droplets have to take on their way up, so that they no longer come to the coldest area of the cooling wall, and on the other hand to the convection flow of the inert gas in the axial area of the To hinder the cooling zone.

Der Verdrängungskörper trägt zur Lösung der der Erfindung zu­grundeliegenden Aufgabe dadurch bei, daß er zum einen den Axial­bereich der Kühlzone besetzt und damit Kondensattröpfchen früh­zeitig in Richtung auf die gekühlte Wand ablenkt, und zum an­deren dadurch, daß er den axialen Bereich der Kühlzone ober­halb der Dampfzone auf einer hohen Temperatur hält, bei der Feststoffablagerungen nicht möglich sind.The displacement body contributes to achieving the object on which the invention is based by firstly occupying the axial region of the cooling zone and thus deflecting condensate droplets early towards the cooled wall, and secondly by opening the axial region of the cooling zone above the steam zone maintains a high temperature at which solid deposits are not possible.

Vorzugsweise sind die Spiralrippen dachförmig nach außen ge­neigt, so daß Kondensat durch Schwerkraft nach außen in Rich­tung auf die Kaminwand abfließen kann.The spiral ribs are preferably inclined outward in a roof shape, so that condensate can flow outwards by gravity towards the chimney wall.

Es ist nicht notwendig, aber aus fertigungstechnischen Gründen sinnvoll, daß die Spiralrippen als eingängige Schraube ausgebil­det sind. Möglich wäre es beispielsweise auch, die Rippenstruk­tur zu unterbrechen und mindestens zwei hintereinanderliegende eingängige Schrauben auszubilden, von denen die eine beispiels­weise rechtsgängig und die andere linksgängig sein könnte oder von denen die eine einen größeren Schraubengang als die andere besitzt.It is not necessary, but useful for manufacturing reasons, that the spiral ribs are designed as a single-start screw. It would also be possible, for example, to interrupt the rib structure and to form at least two single-start screws lying one behind the other, one of which could be, for example, right-handed and the other left-handed, or one of which has a larger screw thread than the other.

Nachfolgend wird die Erfindung anhand eines bevorzugten Aus­führungsbeispiels mithilfe zweier Figuren näher erläutert.

  • Fig. 1 zeigt im Querschnitt einen Wärmerohrofen mit einem er­findungsgemäßen druckgesteuerten Wärmerohr.
  • Fig. 2 zeigt in vergrößertem Maßstab ein Detail aus Fig. 1.
The invention is explained in more detail below on the basis of a preferred exemplary embodiment with the aid of two figures.
  • Fig. 1 shows in cross section a heat pipe furnace with a pressure-controlled heat pipe according to the invention.
  • FIG. 2 shows a detail from FIG. 1 on an enlarged scale.

Der in Fig. 1 dargestellte Wärmerohrofen besteht aus einem doppelwandigen horizontalen Wärmerohr 1, das einen Ofenkanal 2 koaxial umgibt. Im Bereich zwischen den beiden Wänden des Wärmerohrs 1 befindet sich ein Wärmeträgermedium, z.B. Wasser, Caesium oder Natrium, das an einer Wärmequelle 3 verdampft und an einer Wärmesenke 4 kondensiert. Die Wärmequelle wird beispielsweise von einer Widerstandsheizung gebildet, die in eine das Wärme­rohr 1 umgebende Isolierung 5 eingefügt ist und das Wärmerohr von außen aufheizt. Die Wärmesenke 4 wird von einem Kamin ge­bildet, der an das Wärmerohr angeschlossen ist und oben aus der Isolierung 5 herausragt. Die Außenwand des Kamins ist im oberen Bereich gekühlt, beispielsweise mithilfe einer Wasser­kühlung 6. Am Deckel 7 des Kamins mündet eine Inertgasleitung 14, z.B. eine Heliumleitung, durch die der oberste Kaminbereich mit einem Inertgasstopfen 8 versehen werden kann. Durch geeignete Wahl des Heliumdrucks kann die Grenzschicht 9 zwischen dem dampfförmigen Wärmeträgermedium in der Wärmeröhre 1 und dem Inertgasstopfen vertikal verschoben werden, so daß ein mehr oder minder großer Bereich der gekühlten Wand als Wärmesenke für das Wärmeträgermedium verfügbar ist. Die Heliumeinspeisung erfolgt durch einen nicht dargestellten Regelkreis, der die Temperatur im Ofen 2 an einer Solltemperatur orientiert.The heat pipe furnace shown in Fig. 1 consists of a double-walled horizontal heat pipe 1 which coaxially surrounds a furnace channel 2. In the area between the two walls of the heat pipe 1 there is a heat transfer medium, for example water, cesium or sodium, which evaporates at a heat source 3 and condenses at a heat sink 4. The heat source is formed, for example, by a resistance heater, which is inserted into an insulation 5 surrounding the heat pipe 1 and which heats the heat pipe from the outside. The heat sink 4 is formed by a chimney which is connected to the heat pipe and protrudes from the insulation 5 at the top. The outer wall of the chimney is cooled in the upper region, for example with the aid of water cooling 6. An inert gas line 14, for example a helium line, opens at the cover 7 of the chimney, through which the uppermost chimney region can be provided with an inert gas plug 8. By suitable choice of the helium pressure, the boundary layer 9 between the vaporous heat transfer medium in the heat pipe 1 and the Inert gas plugs are moved vertically so that a more or less large area of the cooled wall is available as a heat sink for the heat transfer medium. The helium is fed in by a control circuit, not shown, which orients the temperature in the furnace 2 at a desired temperature.

Fig. 2 zeigt vergrößert das obere Ende des Kamins 4 mit der Wasserkühlung 6 und der Grenzschicht 9 zwischen dem Inertgas­stopfen 8 und dem Dampf des Wärmeträgermediums. In diesen Kamin ragt axial von oben durch einen Deckel 7 gehalten ein Verdrängungskörper 11 hinein, der aus einem gut wärmeleitfähi­gen Metall besteht. Der Verdrängungskörper reicht bis unter­halb des Mindestniveaus der Grenzschicht 9, so daß seine Spitze stets in das dampfförmige Wärmeträgermedium eintaucht. Die obere Hälfte dieses Verdrängungskörpers trägt Spiralrippen 12, die fast bis an die mit Kapillarrillen 13 versehene Wand des Kamins reichen.Fig. 2 shows an enlarged view of the upper end of the chimney 4 with the water cooling 6 and the boundary layer 9 between the inert gas plug 8 and the steam of the heat transfer medium. A displacement body 11, which consists of a highly thermally conductive metal, projects axially into this chimney from above by a cover 7. The displacement body extends below the minimum level of the boundary layer 9, so that its tip is always immersed in the vaporous heat transfer medium. The upper half of this displacement body carries spiral ribs 12 which extend almost to the wall of the chimney provided with capillary grooves 13.

Der erfindungsgemäße Kamineinsatz lenkt die Tröpfchen seit­lich ab und verringert Konvektionseffekte, da die Dampfpar­tikel frühzeitig aus dem axialen Bereich nach außen in Rich­tung auf die gekühlte Kaminwand gedrängt werden. Zugleich hält der Verdrängungskörper 11, dessen unteres Ende in den heißen Dampf des Wärmeträgermediums eintaucht, die Spiral­rippen auf einer gegenüber der Wand hohen Temperatur, so daß dort keine Feststoffablagerungen zu befürchten sind, die den Ofen unbrauchbar machen könnten. Diese Einflüsse des erfin­dungsgemäßen Kamineinsatzes fördern also die Stabilität unter Normalbedingungen.The fireplace insert according to the invention deflects the droplets laterally and reduces convection effects, since the steam particles are forced outward from the axial area towards the cooled chimney wall at an early stage. At the same time, the displacer 11, the lower end of which is immersed in the hot steam of the heat transfer medium, keeps the spiral ribs at a high temperature in relation to the wall, so that there is no fear of solid deposits which could render the furnace unusable. These influences of the fireplace insert according to the invention thus promote stability under normal conditions.

Bei gewünschten Änderungen des Betriebszustands, insbesondere bei einer Absenkung der Ofentemperatur durch Verkleinerung des Inertgasstopfens wird ebenfalls die Gefahr von bis in die obe­ren Bereich des Kamins vordringenden Kondensattröpfchen be­seitigt, während ohne den erfindungsgemäßen Einsatz in diesem Fall sogar in die Heliumleitung 14 Kondensattröpfchen ein­dringen können.If desired changes in the operating state, in particular when the furnace temperature is reduced by reducing the size of the inert gas plug, the risk of condensate droplets penetrating into the upper region of the chimney is also eliminated, while in this case 14 condensate droplets can even penetrate into the helium line without the use according to the invention.

Schließlich bringt der erfindungsgemäße Kamineinsatz auch Sicherheitsvorteile bei einem Unfall, bei dem die Helium­zuleitung bricht. In diesem Fall muß der dann aufsteigende Dampfstrom des Wärmeträgermediums die ganzen Spiralen durch­laufen, ehe er durch die gebrochene Heliumleitung austreten kann. Hier wirkt der Einsatz somit als Kondensationsfalle und verhindert ein Austreten des Wärmeträgermediums.Finally, the fireplace insert according to the invention also brings safety advantages in the event of an accident in which the helium supply line breaks. In this case, the then rising steam flow of the heat transfer medium must pass through the entire spiral before it can escape through the broken helium line. Here the insert acts as a condensation trap and prevents the heat transfer medium from escaping.

Die Erfindung ist nicht auf das im einzelnen dargestellte Aus­führungsbeispiel beschränkt. So kann das Wärmerohr auch eine andere Form als die eines doppelwandigen koaxialen Rohrs be­sitzen. Das Wärmerohr braucht nicht waagerecht zu liegen, son­dern kann auch geneigt sein oder senkrecht stehen. Während bei einer waagerechten Wärmerohrmontage wichtig ist, daß alle Innen­wände mit Kapillarstrukturen versehen sind, damit alle Wände stets mit flüssigem Wärmeträgermedium benetzt sind, könnte bei einer Senkrechtmontage die Benetzung auch ohne Kapillar­strukturen alleine durch die Schwerkraft erfolgen. Der Kamin könnte auch schräg auf dem Wärmerohr aufgesetzt werden, wenn nur dafür gesorgt wird, daß er höher als letzteres liegt.The invention is not restricted to the exemplary embodiment shown in detail. The heat pipe can also have a shape other than that of a double-walled coaxial pipe. The heat pipe does not need to be horizontal, but can also be inclined or vertical. While it is important in a horizontal heat pipe assembly that all inner walls are provided with capillary structures so that all walls are always wetted with liquid heat transfer medium, with vertical assembly the wetting could also be done by gravity alone without capillary structures. The chimney could also be placed at an angle on the heat pipe if only it was ensured that it was higher than the latter.

Die Spiralrippen könnten durch anders geformte Einbauten er­setzt werden, z.B. durch pagodenähnliche Abweisbleche, die als Schikanen für die Dampfströmung wirken und ebenfalls den Ringraum zwischen dem Verdrängungskörper und der gekühlten Wand in zahlreiche miteinander in Verbindung stehende Teil­volumen unterteilen.The spiral ribs could be replaced by internally shaped internals, e.g. through pagoda-like deflector plates, which act as chicanes for the steam flow and also divide the annular space between the displacement body and the cooled wall into numerous interconnected partial volumes.

Je nach den zulässigen Druckverlusten entlang der Kühlzone kann man die Spiralschraube auch als mehrgängige Schraube aus­bilden, die eine größere Steigung als eine eingängige Schraube haben kann, ohne daß die einzelnen Teilvolumen dadurch ver­größert würden.Depending on the permissible pressure losses along the cooling zone, the spiral screw can also be designed as a multi-start screw, which can have a greater pitch than a single-start screw, without the individual partial volumes being increased thereby.

Claims (3)

1. Druckgesteuertes Wärmerohr, bestehend aus einem ein Wärme­trägermedium enthaltenden geschlossenen Gefäß mit einer Wärme­quelle, an der das Wärmeträgermedium verdampft, und einer Wärme­senke in Form einer Kühlzone, wobei am oberen Ende der Kühl­zone ein nichtkondensierbares Inertgas unter regelbarem Druck in das Gefäß einspeisbar ist, dadurch gekennzeichnet, daß vom oberen Ende der Kühlzone aus entlang des zentralen Be­reichs dieser Zone ein gut wärmeleitender Verdrängungskörper (11) nach unten ragt, und daß dieser Verdrängungskörper zumin­dest in seinem oberen Teil Ablenkbleche (12) trägt, die den Zwischenraum zwischen dem Verdrängungskörper und der gekühlten Wand dieser Zone in eine Vielzahl von miteinander in Verbindung stehenden Volumen unterteilt.1. Pressure-controlled heat pipe, consisting of a closed vessel containing a heat transfer medium with a heat source at which the heat transfer medium evaporates, and a heat sink in the form of a cooling zone, a non-condensable inert gas being able to be fed into the vessel under controllable pressure at the upper end of the cooling tube characterized in that from the upper end of the cooling zone along the central region of this zone a thermally conductive displacement body (11) projects downwards, and that this displacement body carries at least in its upper part baffles (12) which space between the displacement body and the cooled Wall of this zone divided into a plurality of interconnected volumes. 2. Wärmerohr nach Anspruch 1, dadurch gekennzeichnet, daß die Ablenkbleche als Spiralrippen (12) ausgebildet sind, die bis in die Nähe der gekühlten Wand reichen.2. Heat pipe according to claim 1, characterized in that the baffles are designed as spiral ribs (12) which extend into the vicinity of the cooled wall. 3. Wärmerohr nach Anspruch 2, dadurch gekennzeichnet, daß die Spiralrippen (12) dachförmig nach außen geneigt sind.3. Heat pipe according to claim 2, characterized in that the spiral ribs (12) are inclined roof-shaped outwards.
EP86110933A 1985-08-19 1986-08-07 Heat pipe controlled by pressure Expired EP0212473B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU86046A LU86046A1 (en) 1985-08-19 1985-08-19 PRESSURE CONTROLLED HEAT PIPE
LU86046 1985-08-19

Publications (3)

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EP0212473A2 true EP0212473A2 (en) 1987-03-04
EP0212473A3 EP0212473A3 (en) 1987-07-29
EP0212473B1 EP0212473B1 (en) 1989-05-24

Family

ID=19730533

Family Applications (1)

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EP86110933A Expired EP0212473B1 (en) 1985-08-19 1986-08-07 Heat pipe controlled by pressure

Country Status (9)

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US (1) US4674562A (en)
EP (1) EP0212473B1 (en)
JP (1) JPH0686991B2 (en)
CA (1) CA1267406A (en)
DE (1) DE3663587D1 (en)
DK (1) DK160963C (en)
IE (1) IE57284B1 (en)
LU (1) LU86046A1 (en)
PT (1) PT83193B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0379437A1 (en) * 1989-01-20 1990-07-25 Bertin & Cie Method and apparatus for the rapid regulation of the temperature of a wall

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917178A (en) * 1989-05-18 1990-04-17 Grumman Aerospace Corporation Heat pipe for reclaiming vaporized metal
GB2315324A (en) * 1996-07-16 1998-01-28 Alan Brown Thermo-syphons
US7497136B2 (en) * 2006-12-13 2009-03-03 Espec Corp. Environmental test apparatus
DE102008021975A1 (en) 2008-05-02 2009-11-05 Bayerische Motoren Werke Aktiengesellschaft Pressure controlled heat pipe for use as e.g. thermostat, has encapsulated area formed within wall, where flexible part of wall is folded into interior space of pipe, so that pressure change is produced in interior space of pipe

Citations (3)

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SU217083A1 (en) * Е. Г. Кардашевский EDUCATIONAL DEVICE ON MATHEMATICS FOR THE STUDY OF SCHEDULES OF ELEMENTARY FUNCTIONS
SU838058A1 (en) * 1979-07-23 1981-06-15 Московское Научно-Производственноеобъединение По Механизированномустроительному Инструменту И Отделоч-Ным Машинам (Объединение Вниисми) Plaster-feeding nozzle
GB2117104A (en) * 1982-03-11 1983-10-05 Mahdjuri Sabet Faramarz Heat pipe for collecting solar radiation

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LU57482A1 (en) * 1968-12-05 1970-06-09
US3934643A (en) * 1971-07-26 1976-01-27 Nikolaus Laing Controllable heat pipe
NL7206063A (en) * 1972-05-04 1973-11-06 N.V. Philips Gloeilampenfabrieken HEATING DEVICE
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SU217083A1 (en) * Е. Г. Кардашевский EDUCATIONAL DEVICE ON MATHEMATICS FOR THE STUDY OF SCHEDULES OF ELEMENTARY FUNCTIONS
SU838058A1 (en) * 1979-07-23 1981-06-15 Московское Научно-Производственноеобъединение По Механизированномустроительному Инструменту И Отделоч-Ным Машинам (Объединение Вниисми) Plaster-feeding nozzle
GB2117104A (en) * 1982-03-11 1983-10-05 Mahdjuri Sabet Faramarz Heat pipe for collecting solar radiation

Non-Patent Citations (4)

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Title
P. DUNN et al.: "Heat pipes", Ausgabe 3, 1982, Seiten 226-231, Pergamon Press, Oxford, GB *
PROCEEDINGS PART II, 5TH INTERNATIONAL HEAT PIPE CONFERENCE, Tsukuba Science City, 14.-18. Mai 1984, Seiten 15-47, Japan Technology & Economics Center Inc., Tokyo, Japan; F. POLASEK: "Heat pipe research and development in east european countries" *
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SOVIET INVENTIONS ILLUSTRATED, Woche K/22, 13. Juli 1983, Zusammenfassung Nr. 53542; & SU-A-217 083 (BIOTECH. RES. INST.) 15-07-1982 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0379437A1 (en) * 1989-01-20 1990-07-25 Bertin & Cie Method and apparatus for the rapid regulation of the temperature of a wall
WO1990008298A1 (en) * 1989-01-20 1990-07-26 Bertin & Cie Method and device for fast regulation of a wall temperature
FR2642156A1 (en) * 1989-01-20 1990-07-27 Bertin & Cie METHOD AND DEVICE FOR QUICKLY CONTROLLING A WALL TEMPERATURE
US5161609A (en) * 1989-01-20 1992-11-10 Bertin & Cie Method and apparatus for high speed regulation of a wall temperature

Also Published As

Publication number Publication date
JPH0686991B2 (en) 1994-11-02
DK160963C (en) 1991-11-04
IE57284B1 (en) 1992-07-01
IE862076L (en) 1987-02-19
DK160963B (en) 1991-05-06
DE3663587D1 (en) 1989-06-29
US4674562A (en) 1987-06-23
PT83193B (en) 1992-10-30
EP0212473A3 (en) 1987-07-29
DK385886D0 (en) 1986-08-13
JPS6298191A (en) 1987-05-07
LU86046A1 (en) 1986-09-11
EP0212473B1 (en) 1989-05-24
DK385886A (en) 1987-02-20
CA1267406A (en) 1990-04-03
PT83193A (en) 1986-09-01

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