FR2528557A1 - Heat exchanger with third intermediate fluid - has intermediate fluid separating first and second fluid in coaxial multi-tube assemblies and one chamber wall giving direct heat flow - Google Patents

Heat exchanger with third intermediate fluid - has intermediate fluid separating first and second fluid in coaxial multi-tube assemblies and one chamber wall giving direct heat flow Download PDF

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Publication number
FR2528557A1
FR2528557A1 FR8210382A FR8210382A FR2528557A1 FR 2528557 A1 FR2528557 A1 FR 2528557A1 FR 8210382 A FR8210382 A FR 8210382A FR 8210382 A FR8210382 A FR 8210382A FR 2528557 A1 FR2528557 A1 FR 2528557A1
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France
Prior art keywords
fluid
intermediate fluid
tube assemblies
heat exchanger
primary
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Pending
Application number
FR8210382A
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French (fr)
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DAMOIS MICHEL
Original Assignee
DAMOIS MICHEL
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 DAMOIS MICHEL filed Critical DAMOIS MICHEL
Priority to FR8210382A priority Critical patent/FR2528557A1/en
Publication of FR2528557A1 publication Critical patent/FR2528557A1/en
Pending legal-status Critical Current

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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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0229—Double end plates; Single end plates with hollow spaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/208—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with tubes filled with heat transfer fluid
    • 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
    • F28D7/16—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 being arranged in parallel spaced relation
    • F28D7/1615—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 being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
    • F28D7/1623—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 being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/003—Multiple wall conduits, e.g. for leak detection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/16—Safety or protection arrangements; Arrangements for preventing malfunction for preventing leakage

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The fluid loss detector comprises an intermediate fluid placed between the inside and outside of two assemblies of straight, co-axial, multi tube assemblies connected to an expansion tank (27). The tube assemblies are removable from the tank (31) containing secondary fluid. One wall (24) contacts the primary (1) and secondary (3) fluid and is made of material resistant to corrosion and has a thickness greater than that of the tube assemblies. The whole of the exchange surface covered by the intermediate fluid (2) is surrounded by the secondary fluid (3) and extends between the front chamber plate (11,21) and the rear chamber plate (12,22).

Description

ECHANGEUR DE CHALEUR A DETECTION DE FUITES
MULTITUBULAIRE RECTILIGNE
Les échangeurs de chaleur du type comprenant un premier circuit parcouru par un fluide à une température définie et un circuit secondaire parcouru par un fluide destin à changer une certaine tempdrature avec le premier fluide, très répandus dans l'industrie sont employas pour le réchauf- fage ou le refroidissement de fluides dits secondaires au moyen de fluides dits primaires circulant dans des conditions de contact leur permettant de se transmettre une partie de leur tempdrature. LEAK DETECTION HEAT EXCHANGER
RECTILINEAR MULTITUBULAR
Heat exchangers of the type comprising a first circuit traversed by a fluid at a defined temperature and a secondary circuit traversed by a fluid intended to change a certain temperature with the first fluid, very widespread in the industry are used for reheating or the cooling of so-called secondary fluids by means of so-called primary fluids circulating in contact conditions allowing them to transmit part of their temperature.

Pour des questions de sécurité notamment quand des fluides toxiques voisinent avec des liquides alimentaires il peut être avantageux d'employer des changeurs à détection de fuites dans lesquels on trouve souvent un fluide intermé- diaire entre le fluide primaire et le fluide secondaire ; ainsi tout percement de la paroi du circuit primaire ou de la paroi du circuit secondaire a des répercussions sur le volume, la pression ou la température du fluide intermédiaire, ce qui permet de dUceler la présence d'une fuite et par conséquent la détérioration de l'appareil. For safety reasons, in particular when toxic fluids are close to edible liquids, it may be advantageous to use leak-detection changers in which there is often an intermediate fluid between the primary fluid and the secondary fluid; thus any piercing of the wall of the primary circuit or of the wall of the secondary circuit has repercussions on the volume, the pressure or the temperature of the intermediate fluid, which makes it possible to detect the presence of a leak and consequently the deterioration of the 'apparatus.

De tels changeurs connus, présentent souvent l'inconvénient d'être compliqués, ondreux et de mauvais rendement du fait m8me de la difficult à constituer un circuit intermédiaire contenant le fluide intermédiaire détecteur entre le circuit traversé par le fluide primaire et le circuit travers par le fluide secondaire. Such known changers often have the drawback of being complicated, costly and of poor efficiency owing to the difficulty of constituting an intermediate circuit containing the detector intermediate fluid between the circuit crossed by the primary fluid and the circuit traversed by the secondary fluid.

La présente invention vise précisément à rdaliser un échangeur de chaleur multitubulaire à détection de fuites d'une grande simplicit4 puisqu'il est constitué de tubes rectilignes en jonction avec des plaques à tubes de technologie courante chez les fabricants dchangeurs de température.  The present invention specifically aims to make a multitubular heat exchanger with leak detection of great simplicity4 since it consists of straight tubes in junction with tube plates of current technology from manufacturers of temperature exchangers.

La figure 1 rapporte une telle dispositif tion ; elle représente un échangeur de chaleur selon l'invention et stapplique à l'échange de chaleur entre deux fluides, cet échangeur tant constitué de trois circuits distincts (1) (2) (3). Figure 1 reports such a device; it represents a heat exchanger according to the invention and applies to the exchange of heat between two fluids, this exchanger being made up of three distinct circuits (1) (2) (3).

Un premier circuit (1) contonant un fluide primaire à une pression déterminée, un deuxième circuit (2) contenant un fluide intermédiaire à une pression inférieure au précédent et un troisième circuit (3) contenant un fluide secondaire à une pression supérieure au deuxième. A first circuit (1) containing a primary fluid at a determined pressure, a second circuit (2) containing an intermediate fluid at a pressure lower than the previous one and a third circuit (3) containing a secondary fluid at a pressure higher than the second.

Le circuit primaire (1) selon linven- tion est inséré dans un assemblage formant un rdoiplent constitu de deux plaques à tubes (11) et (12), percées et reliées entr'elles d'une manière étanche par un faisceau multltubulaire à tubes coaxiaux rectilignes (13), assemblage compl < St4 à une ex trèmité par une chambre de distribution (14) du fluide primaire comportant un orifice d'entrée (15) et de sortie (16) et fermé à l'autre extrémité par une chambre de circulation (17), le tout fixez au reservoir secondaire (31) par un ensemble boulonné (18) d'une manière étanche. The primary circuit (1) according to the invention is inserted into an assembly forming a rdoiplent consisting of two tube plates (11) and (12), pierced and connected to each other in a sealed manner by a multltubular bundle of coaxial tubes rectilinear (13), complete assembly <St4 at one end by a distribution chamber (14) of the primary fluid comprising an inlet (15) and outlet (16) orifice and closed at the other end by a circulation (17), all attach to the secondary tank (31) by a bolted assembly (18) in a sealed manner.

Le circuit intermédiaire (2) logé dans un espace étroit enveloppant le circuit primaire (1) s'inscrit entre un ensemble formé de deux plaques à tube (21) et (22) percées et relises entr'elles dXune manière étanche par un faisceau tubulaire rectiligne (23) fermé à une extrémité par une paroi (24) et les surfaces extérieures (lr) (12) (13) et (17) du circuit primaire précédent . Il communique par lontromise dtun orifice (25) relit par une conduite (26) à un vase d'expansion (27) muni d'un orifice de trop plein (28). The intermediate circuit (2) housed in a narrow space enveloping the primary circuit (1) is between an assembly formed by two tube plates (21) and (22) pierced and joined together in a sealed manner by a tubular bundle rectilinear (23) closed at one end by a wall (24) and the external surfaces (lr) (12) (13) and (17) of the previous primary circuit. It communicates by lontromise dtun an orifice (25) connected by a pipe (26) to an expansion tank (27) provided with an overflow orifice (28).

Le circuit secondaire (3) traverse par exemple un réservoir (31) comportant des orifices d'entrée (32) et de sortie (33) du fluide secondaire.  The secondary circuit (3) passes, for example, through a reservoir (31) comprising inlet (32) and outlet (33) orifices for the secondary fluid.

Le fluide secondaire contenu dans le réservoir (31) est par exemple à réchauffer ; pour ce faire, un fluide primaire (1) plus chaud est introduit dans le circuit primaire par l'orifice (ils) et normalement acheminé à intérieur du faisceau tubulaire (13) et de l'embouti (17) pour ressortir par l'orifice (16) abandonnant en parcours une partie de ses calories au circuit intermédiaire (2) au profit du fluide in termédiaire qui de volume restreint, retransmet à son tour in plus grande partie de sa chaleur au circuit (3) au profit dtz fluide secondaire. The secondary fluid contained in the reservoir (31) is for example to be heated; to do this, a warmer primary fluid (1) is introduced into the primary circuit through the orifice (they) and normally routed inside the tubular bundle (13) and the stamped (17) to exit through the orifice (16) abandoning part of its calories in the intermediate circuit (2) in favor of the intermediate fluid which of limited volume, in turn transmits in greater part of its heat to the circuit (3) in favor of secondary fluid dtz.

Du fait de l'interposition d'un fluideintermédiaire entre les fluides primaire et secondaire, tout percement dune quelconque paroi du circuit intermédiaire (2) se traduit par un débordement du fluide intermédiaire puisque les pressions des fluides primaire et secondaire sont supdrieures à celle du fluide intermédiaire, et ainsi la dbtection de fuites en un point quelconque de l'échangeur est assure et contrdlablo.  Due to the interposition of an intermediate fluid between the primary and secondary fluids, any piercing of any wall of the intermediate circuit (2) results in an overflow of the intermediate fluid since the pressures of the primary and secondary fluids are greater than that of the fluid intermediate, and thus the detection of leaks at any point of the exchanger is ensured and contrdlablo.

De ces dispositions résulte encore que les fluides primaires et secondaire ne peuvent entrer en contact ltun avec l'autre sans que l'utilisateur, par la surveillance du niveau du liquide dans le vase d'expansion ne soit prévenu de la détérioration de ltéchangeur. From these arrangements further results that the primary and secondary fluids cannot come into contact with each other without the user, by monitoring the level of the liquid in the expansion tank, being warned of the deterioration of the exchanger.

La figure 2 représente un échangeur de chaleur selon l'invention présentant une variante simplifiée du prdc4- dent en ce que le volume du circuit intermédiaire comportant le fluide supplémentaire détecteur, est réduit et contenu entre les faisceaux de tubes (13 et (23) et les plaques à tube (11) et (21) - (12) et (22) ; ce circuit étant relié de meme que le précédent à l'orifice (25), lacanalisation (26), le vase d'expansion (27) et son orifice de trop plein (28). FIG. 2 represents a heat exchanger according to the invention presenting a simplified variant of the prdc4-tooth in that the volume of the intermediate circuit comprising the additional detector fluid is reduced and contained between the bundles of tubes (13 and (23) and the tube plates (11) and (21) - (12) and (22); this circuit being connected as the previous one to the orifice (25), the pipe (26), the expansion tank (27) and its overflow hole (28).

La paroi (24) est constituée normalement de maté- riaux résistant à la corrosion ou de forte épaisseur afin d'éliminer les risques de percement de cette paroi.  The wall (24) normally consists of materials resistant to corrosion or very thick in order to eliminate the risks of piercing of this wall.

Claims (5)

REVENDICATIONS 1. Echangeur de chaleur à fluide intermédiaire détecteur de fuites caractérisé en ce que le fluide détecteur de fuites est contenu pour l'essentiel entre l'intérieur et l'ex- térieur de deux faisceaux multitubulaires i tubes coaxiaux rec tilignes (13) et (23) reliés à un vase d'expansion.(27)  1. Leak detector intermediate fluid heat exchanger characterized in that the leak detector fluid is essentially contained between the inside and the outside of two multitubular bundles i rec tilinear coaxial tubes (13) and ( 23) connected to an expansion tank. (27) 2. Echangeur selon la revendication 1 caractérisé on ce que l'ensemble constituant les faisceaux tubulaires del'échan- geur est séparable du réservoir (31) contenant le fluide secondaire. 2. Exchanger according to claim 1 characterized in that the assembly constituting the tubular bundles of the exchanger is separable from the reservoir (31) containing the secondary fluid. 3. Echangeur figure 2 selon les revendications 1 et 2 caractérisé en ce qu'une paroi (24) en contact avec les fluides primaire (t) et secondaire (3) est constituée de matériaux résis- tant à la corrosion ou possède une épaisseur supérieure aux fais coyaux tubulaires (13) et (23). 3. Figure 2 exchanger according to claims 1 and 2 characterized in that a wall (24) in contact with the primary (t) and secondary (3) fluids is made of corrosion-resistant materials or has a greater thickness to the tubular cores (13) and (23). 4. Echangeur selon les revendication 1 22 et # carac tersé en ce que la totalité de la surface d'échange parcourue par le fluide intermédiaire (2) est en contact avec le fluide secondaire (3). 4. Exchanger according to claim 1 22 and # charac tersed in that the entire exchange surface traversed by the intermediate fluid (2) is in contact with the secondary fluid (3). 5. Echangeur selon les revendications 1 à 4 caractérisé en ce qu'il est constitué, une chambre intérieure entre les plaques à tubes avant (11) et (21) et une chambre intérieure entre les plaques à tubes arrière (12) et (22).  5. Exchanger according to claims 1 to 4 characterized in that it is constituted, an inner chamber between the front tube plates (11) and (21) and an inner chamber between the rear tube plates (12) and (22 ).
FR8210382A 1982-06-11 1982-06-11 Heat exchanger with third intermediate fluid - has intermediate fluid separating first and second fluid in coaxial multi-tube assemblies and one chamber wall giving direct heat flow Pending FR2528557A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8210382A FR2528557A1 (en) 1982-06-11 1982-06-11 Heat exchanger with third intermediate fluid - has intermediate fluid separating first and second fluid in coaxial multi-tube assemblies and one chamber wall giving direct heat flow

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Application Number Priority Date Filing Date Title
FR8210382A FR2528557A1 (en) 1982-06-11 1982-06-11 Heat exchanger with third intermediate fluid - has intermediate fluid separating first and second fluid in coaxial multi-tube assemblies and one chamber wall giving direct heat flow

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FR2528557A1 true FR2528557A1 (en) 1983-12-16

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3084332A4 (en) * 2013-12-19 2017-10-18 Lars Hansen Tubing for heat exchange, and a method for improving heat exchange
CN111981886A (en) * 2020-09-09 2020-11-24 浙江杭特容器有限公司 High-efficient constant temperature half-capacity heat exchanger group
WO2022077130A1 (en) * 2020-10-15 2022-04-21 Uribe Ramos Sergio Eduardo Non-pressurised heat-exchange device comprising a flue duct connected to a box of tubes of a first transfer stage that includes tubes that connect to a box for transfer between the first and second stages; and associated method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB748264A (en) * 1951-10-23 1956-04-25 Foster Wheeler Ltd Improvements in and relating to heat exchangers
DE1816944A1 (en) * 1968-12-24 1970-07-02 Heinrich Landgrebe Water heater
FR2412807A1 (en) * 1977-12-20 1979-07-20 Collard Et A Trolart Sa G Heat exchanger with tubes sealed against fluid leakage - in which metal tubes have plastics sleeves or inserts deformable into contact with tubes under fluid pressure
GB2078927A (en) * 1980-06-20 1982-01-13 Grumman Energy Systems Inc Heat exchange system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB748264A (en) * 1951-10-23 1956-04-25 Foster Wheeler Ltd Improvements in and relating to heat exchangers
DE1816944A1 (en) * 1968-12-24 1970-07-02 Heinrich Landgrebe Water heater
FR2412807A1 (en) * 1977-12-20 1979-07-20 Collard Et A Trolart Sa G Heat exchanger with tubes sealed against fluid leakage - in which metal tubes have plastics sleeves or inserts deformable into contact with tubes under fluid pressure
GB2078927A (en) * 1980-06-20 1982-01-13 Grumman Energy Systems Inc Heat exchange system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3084332A4 (en) * 2013-12-19 2017-10-18 Lars Hansen Tubing for heat exchange, and a method for improving heat exchange
US10077950B2 (en) 2013-12-19 2018-09-18 Lars Hansen Tubing for heat exchange, and a method for improving heat exchange
CN111981886A (en) * 2020-09-09 2020-11-24 浙江杭特容器有限公司 High-efficient constant temperature half-capacity heat exchanger group
WO2022077130A1 (en) * 2020-10-15 2022-04-21 Uribe Ramos Sergio Eduardo Non-pressurised heat-exchange device comprising a flue duct connected to a box of tubes of a first transfer stage that includes tubes that connect to a box for transfer between the first and second stages; and associated method

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