EP0099777B1 - Wärmeschacht mit Temperaturregelung - Google Patents

Wärmeschacht mit Temperaturregelung Download PDF

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Publication number
EP0099777B1
EP0099777B1 EP83401272A EP83401272A EP0099777B1 EP 0099777 B1 EP0099777 B1 EP 0099777B1 EP 83401272 A EP83401272 A EP 83401272A EP 83401272 A EP83401272 A EP 83401272A EP 0099777 B1 EP0099777 B1 EP 0099777B1
Authority
EP
European Patent Office
Prior art keywords
well
temperature
bellows
liquid
coil
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP83401272A
Other languages
English (en)
French (fr)
Other versions
EP0099777A1 (de
Inventor
Gérard Cambon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre National dEtudes Spatiales CNES
Original Assignee
Centre National dEtudes Spatiales CNES
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 Centre National dEtudes Spatiales CNES filed Critical Centre National dEtudes Spatiales CNES
Priority to AT83401272T priority Critical patent/ATE29789T1/de
Publication of EP0099777A1 publication Critical patent/EP0099777A1/de
Application granted granted Critical
Publication of EP0099777B1 publication Critical patent/EP0099777B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • 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
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
    • F28D2021/0029—Heat sinks

Definitions

  • the present invention relates to a heat sink with temperature regulation. It finds an application in the production of materials implementing thermal processes with the aim of developing various materials. In particular, the invention finds an application in the development of materials on board artificial satellites.
  • the apparatus represented in FIG. 1 comprises a support structure 10, a bench 12 resting on this structure, one or more experimental tubes 14 (for example three tubes at 120 °) kept fixed relative to the bench, a first stationary oven 20 associated with a first heat sink 22 also fixed, a second mobile oven 24 associated with a second mobile heat sink 26, a translation table 30 supporting the oven and the mobile sink, and finally a system 32 for controlling the movement of Table.
  • the diagram at the top of the figure shows the temperature distribution along the tube 14. There appear two temperature gradients G 1 and G 2 , the first fixed and the second mobile.
  • Two solid-liquid interfaces SL1 SL2 mark the zones where the material contained in the tubes 14 passes from the solid phase (right and left ends) to the liquid phase (central zone).
  • a crystalline zone 35 appears at the right end of the experimentation tube.
  • the present invention relates to a heat sink which can be used in an installation of this kind, as means 22 or 26.
  • a heat sink is a device capable of removing a certain amount of heat. In this case, this heat is that which comes from the central zone of the appliance located in the ovens and which propagates towards the ends (by conduction, convection, radiation, etc.). To ensure a constant temperature at the ends of the experimentation tubes and thus maintain a correct temperature gradient, this heat must be removed and temperature regulation ensured.
  • a heat sink comprises a heat conducting block (for example made of metal) associated with a means for removing calories and regulating the temperature of the block.
  • the object of the present invention is precisely to solve this problem in the very specific context of space.
  • the subject of the invention is a temperature-regulated heat sink comprising a heat conducting block, in thermal contact with a coil through which a coolant flows, characterized in that the block is pierced with a channel capable of receiving at least one experimentation tube, a layer of alloyed metal having a melting temperature lower than the operating temperature of the well being interposed between the experimentation tube and the heat well.
  • the invention also proposes to solve a related problem which is the regulation of temperature, using a combination of means which fulfill the conditions which are required in the space field, and which have been mentioned above. .
  • Such conditions make it possible to reject a priori certain solutions which could be envisaged to achieve such regulation.
  • the disadvantage of such a system would be to require an auxiliary energy source to power the heating element. For a heat sink capable of evacuating 200 W, such a heating element would consume 50 to 80 W, which would be prohibitive in a satellite.
  • Another object of the present invention is precisely to remedy these drawbacks. To this end, it offers a heat sink which requires neither an auxiliary energy source nor an electronic control circuit. In addition, the invention provides advantages linked to the small size of the means used, their high reliability and their low cost.
  • the heat sink defined above is further characterized in that it comprises an expandable fluid reservoir integrated into the block and comprising a bellows having a movable end, a chamber connected in series with the coil and traversed by the coolant, the bellows being located in this chamber and immersed in the coolant, this chamber having an outlet which can be wholly or partly closed by a movable needle connected by a rod to the movable end of the bellows, so that the needle releases the outlet from the chamber and facilitates the flow of coolant through the coil when the temperature of the well exceeds a set value and conversely closes the outlet and slows the flow of the liquid through the coil when the temperature is below this set value.
  • Figure 2 shows in longitudinal section a heat sink according to the invention.
  • this well comprises a metal block 40 pierced with cylindrical channels 42 intended to receive experimental tubes 44 (a single tube is visible in the figure), a coil 46 in close thermal contact with block 40, (for example by means of a liquid 47 constituted by a liquid metal indium-gallium, or by paraffin, water, alcohol, etc.), a hydraulic input connector 48 and an outlet pipe 50.
  • the coolant can be any but, for the envisaged spatial application, the water seems advantageous.
  • the device illustrated also comprises, in a housing 52 pierced in the block 40, a set of means consisting of the following elements: a reservoir 54 filled with a fluid 55 having a high coefficient of expansion with temperature (a gas for example or a liquid like alcohol), this reservoir being in abutment on a stop 59 and extending by a bellows 56 having a movable end 57.
  • a fluid 55 having a high coefficient of expansion with temperature (a gas for example or a liquid like alcohol)
  • This bellows is located in a chamber 58 into which the outlet pipe 50 enters. The bellows therefore bathes externally in the coolant and internally in the temperature sensing fluid.
  • the chamber 58 has an opening 60 which can be more or less closed by a needle 62, which can bear on a seat 63.
  • the needle 62 is connected by a rod 64 to the movable end 57 of the bellows.
  • the rod 64 has a stop 66 on which a spring 68 comes to bear, which also bears on the bottom of the chamber 58.
  • the opening 60 communicates with an outlet pipe 72 provided with a hydraulic outlet connector 74.
  • the device shown further and secondarily comprises a second bellows 76 and a base 78 on which a spring 80 rests, moreover held by a plug 82 with thread, the depression of which can be adjusted from the outside by rotation. On this plug is fixed an elastic stop 83.
  • the operation of this device is as follows.
  • the coolant which flows through the coil 46 has a flow rate which is fixed by the position of the needle 62 relative to the opening 60.
  • this needle moves with the rod 64 itself actuated by the bellows 56. This- it lengthens when the fluid it contains expands under the effect of a rise in temperature and shrinks under the opposite effect.
  • the flow rate of the coolant is therefore modified during variations in temperature of the fluid contained in the reservoir, and therefore finally during variations in temperature of the well. It will be observed that an increase in temperature has the effect of opening the device and increasing the flow rate of the liquid.
  • Such a principle is already known in particular from GB-A-196 395, FR-A-1 028 294 and FR-A-1 432 935.
  • the needle 62 When the temperature of the well is lower than a set temperature, the needle 62 is in its seat and the coolant does not circulate. When the temperature rises, the expansion of the bellows 56 and 76 has the effect of causing the base 78 to move back, the needle still remaining in its seat. When the base 78 comes into contact with the elastic stop 83, the needle emerges from its seat and the coolant begins to circulate.
  • the setpoint temperature can be adjusted by pushing the plug 82 more or less, which has the effect of adjusting the position of the elastic stop 83 and, consequently, the opening temperature of the needle 62.
  • Sensors 100 are installed in different places of the device in order to facilitate the adjustment and the monitoring of the operating temperature.
  • the fluid 55 the expansion of which controls the opening of the valve
  • the rod 64 which connects the movable end 57 of the bellows to the needle 62 then passes through the bellows.
  • the principle of this variant is the same as before: during a rise in temperature, the bellows contracts (instead of expanding since the fluid 55 is outside the bellows) and under the effect of this deformation, the needle 62 moves away from its seat 63 which has the effect of circulating coolant.
  • the embodiment of Figure 3 is further distinguished from that of the previous figure by the fact that the temperature adjustment means act this time on the position of the seat.
  • the seat 63 is integral with a movable part 90, the position of which can be modified by action on a knurled button 92.
  • the invention provides a liquid metallic seal 84 interposed between the cylindrical channel 42 drilled in the block 40 and the experimentation tube 44.
  • a seal promotes thermal transfer between the tube and the well and therefore improves the efficiency thereof.
  • the metal used must be liquid at the operating temperature of the well, and it is preferably solid at room temperature (for example at 20 ° C.).
  • a metal which is well suited for this use is the indium-gallium alloy, the melting point of which is situated at around 50 ° C.
  • Another advantage is the liquid metal seal solution. If the joint is solid at room temperature, it contributes to maintaining the experimentation tube in the well, which is particularly useful during the launching and putting into orbit phase of the satellite where vibrations risk damaging the tube.
  • the device described is capable of discharging 200 W at a temperature adjustable between 50 ° C and 100 ° C with a temperature regulation of + 1 ° C with a coolant.
  • a coolant which is water at a pressure between 4.2 and 6 bars, this water having a nominal inlet temperature of 21 ° C (minimum 4 ° C maximum 49 ° C) and an outlet temperature of 93 ° C maximum with a maximum flow rate of the order of 0.02 kg / s.
  • the temperature sensing fluid tank can have a volume of 5 to 10 cm 3 and the coil have a length of 4 to 6 meters with an internal diameter of 4 mm, this coil can be wound on an average diameter of 50 mm and include 37 turns.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Cookers (AREA)
  • Road Signs Or Road Markings (AREA)
  • Control Of Temperature (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Claims (6)

1. Wärmesenke, mit einer Anordnung, die eine geregelte Abfuhr von einem in einem Metallblock (40) angeordneten Experimentierrohr (44) stammenden Wärme zu einer Kühlflüssigkeit gewährleistet, die in einer im Metallblock (40) angeordneten Schlange (46) zirkuliert, dadurch gekennzeichnet, dass die Wärmesenke eine Schicht (84) aus einer Metallegierung aufweist, wobei das Metall derart gewählt ist, dass es bei der Betriebstemperatur der Wärmesenke flüssig ist und bei der Umgebungstemperatur fest ist, wobei die Schicht (84) zwischen dem Experimentierrohr (44) und dem Metallblock (40) angeordnet ist, so dass die Schicht (84), wenn sie flüssig ist, eine gute Wärmeleitung zwischen dem Experimentierrohr (44) und dem Metallblock (40) gewährleistet während des Betriebs der Wärmesenke, und wenn sie fest ist, eine gute mechanische Halterung des Experimentierrohrs (44) im Metallblock (40) gewährleistet vor der Inbetriebnahme der Wärmesenke, dass die Wärmesenke eine Flüssigkeit (47) aufweist zwischen der Schlange (46) und dem Metallblock (40), wobei die Flüssigkeit einen guten thermischen Kontakt gewährleistet zwischen dem Block (40) und der Schlange (46) und dass die Wärmesenke eine Regelanordnung aufweist, die auf die Strömung des in der Schlange (46) zirkulierenden Kühlfluids als Funktion der Temperatur der Senke einwirkt, wobei diese Anordnung die Strömung erhöht, wenn die Temperatur der Senke steigt und die Strömung verringert, wenn die Temperatur der Senke sinkt.
2. Wärmesenke nach Anspruch 1, dadurch gekennzeichnet, dass die Metallegierung (84) eine Indium-Gallium-Legierung ist.
3. Wärmesenke nach Anspruch 1, dadurch gekennzeichnet, dass die Regelanordnung für die Strömung des Kühlfluids ein in den Block (40) integriertes Reservoir (54) für das ausdehnbare Fluid (55) aufweist, sowie einen Balg (56) mit einem beweglichen Ende (57), eine Kammer (58), die mit der Schlange (46) in Reihe geschaltet ist und von der Kühlflüssigkeit durchströmt wird, wobei diese Kammer (58) einen Auslass (60) aufweist, der ganz oder teilweise durch eine bewegliche Ventilspitze (62) verschliessbar ist, welche über eine Stange (64) mit dem beweglichen Ende (57) des Balges (56) derart verbunden ist, dass die Ventilspitze den Auslass der Kammer freigibt und die Strömung der Kühlflüssigkeit durch die Schlange ermöglicht, wenn die Temperatur der Senke einen Schwellwert überschreitet und den Auslass verschliesst und die Strömung der Flüssigkeit durch die Schlange verlangsamt, wenn die Temperatur unterhalb dieses Schwellwertes liegt.
4. Wärmesenke nach Anspruch 3, dadurch gekennzeichnet, dass das ausdehnbare Fluid (55) im Inneren des Balges (56) angeordnet ist und die Kühlflüssigkeit ausserhalb des Balges und dass der Stab (64) ausserhalb des Balges angeordnet ist.
5. Wärmesenke nach Anspruch 4, dadurch gekennzeichnet, dass das dem mit dem Stab (64) verbundenen Ende (57) gegenüberliegende Ende des Balges mit einem Teil (78) verbunden ist, das bei Ausdehnung des Balges sich auf einem elastischen Anschlag (83) abstützt, der mit einer Regelanordnung für seine Stellung verbunden ist.
6. Wärmesenke nach Anspruch 3, dadurch gekennzeichnet, dass das ausdehnbare Fluid (55) ausserhalb des Balges angeordnet ist und dass die Kammer (58) mit dem Inneren des Balges in Verbindung steht, der die Kühlflüssigkeit enthält.
EP83401272A 1982-06-21 1983-06-20 Wärmeschacht mit Temperaturregelung Expired EP0099777B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401272T ATE29789T1 (de) 1982-06-21 1983-06-20 Waermeschacht mit temperaturregelung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8210787 1982-06-21
FR8210787A FR2528960B1 (fr) 1982-06-21 1982-06-21 Puits de chaleur a regulation de temperature

Publications (2)

Publication Number Publication Date
EP0099777A1 EP0099777A1 (de) 1984-02-01
EP0099777B1 true EP0099777B1 (de) 1987-09-16

Family

ID=9275212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401272A Expired EP0099777B1 (de) 1982-06-21 1983-06-20 Wärmeschacht mit Temperaturregelung

Country Status (4)

Country Link
EP (1) EP0099777B1 (de)
AT (1) ATE29789T1 (de)
DE (1) DE3373725D1 (de)
FR (1) FR2528960B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8501033L (sv) * 1985-03-04 1986-09-05 Volvo Ab Regleranordning for vermeror

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB196395A (en) * 1922-01-26 1923-04-26 Bernard Robert Wingfield Improvements in steam traps and such like
FR1028294A (fr) * 1949-11-28 1953-05-20 Daimler Benz Ag Dispositif pour le réglage de la température sur des moteurs à combustion interne
US2649368A (en) * 1950-10-07 1953-08-18 American Smelting Refining Indium-bismuth-tin alloy
US3150901A (en) * 1961-11-17 1964-09-29 Gen Electric Bearing surfaces
US3302703A (en) * 1964-07-03 1967-02-07 Trw Inc Thermal valve
FR1432935A (fr) * 1965-04-09 1966-03-25 Hughes Aircraft Co Agencement de soupape sensible à la température
DE2844805A1 (de) * 1978-10-11 1980-04-24 Lange Gmbh Dr Bruno Vorrichtung zur thermostatisierung von proben in photometern
NL7905101A (nl) * 1979-06-29 1980-12-31 Neratoom Warmtewisselaar en pijp ten gebruike daarin.

Also Published As

Publication number Publication date
FR2528960A1 (fr) 1983-12-23
DE3373725D1 (en) 1987-10-22
ATE29789T1 (de) 1987-10-15
EP0099777A1 (de) 1984-02-01
FR2528960B1 (fr) 1988-01-15

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