EP3161401B1 - Pré-refroidisseur pour échangeurs de chaleur refroidis par air - Google Patents

Pré-refroidisseur pour échangeurs de chaleur refroidis par air Download PDF

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Publication number
EP3161401B1
EP3161401B1 EP15722412.2A EP15722412A EP3161401B1 EP 3161401 B1 EP3161401 B1 EP 3161401B1 EP 15722412 A EP15722412 A EP 15722412A EP 3161401 B1 EP3161401 B1 EP 3161401B1
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EP
European Patent Office
Prior art keywords
cooler
air
temperature
tube bundle
heat exchanger
Prior art date
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Not-in-force
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EP15722412.2A
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German (de)
English (en)
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EP3161401A1 (fr
Inventor
Nicholas F. Urbanski
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ExxonMobil Upstream Research Co
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ExxonMobil Upstream Research Co
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0233—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels
    • F28D1/024—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels with an air driving element
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other
    • 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

Definitions

  • Air-cooled heat exchangers are large, semi-enclosed structures used to cool fluids in industrial processes requiring dissipation of large quantities of heat.
  • ACHEs generally include a tube bundle, which may have spiral-wound fins upon the tubes, and a fan, which moves air across the tubes.
  • air-cooled exchangers may be used for the greater part of process cooling.
  • substantially all cooling may be done with air.
  • this increased use of ACHEs may be explained by the lack of available water for water cooling, significant increases in water costs, concern for water pollution, the heat to be removed is too low for water cooling to be economical, etc.
  • Process ACHEs sometimes called fin-fan heat exchangers, function by passing cooler air (forced or induced) across a bank (or bundle) of tubes via one or more motorized fans to cool the process fluid passing through the tubes.
  • the process fluid in the tubes may be liquid, vapor, a mixture of both, or contain solids.
  • the tubes may be plain, externally finned, internally finned, continuously finned, and/or possess numerous heat transfer enhancements familiar to those experienced in the practice.
  • the magnitude of process fluid cooling is dependent on the temperature of the air entering the heat exchanger.
  • the ambient air temperature drives the overall design and size (physical footprint) of ACHEs.
  • Ambient temperature is substantially the temperature of the outside air at the location of the facility, which, depending on the location of the facility, may range from about -40 °C to about +40 °C, depending on the location of the facility and the given time period of concern (e.g., hour, day, month, season, etc.).
  • a design ambient air temperature may be employed in the design of ACHEs.
  • the design ambient air temperature may be based on the maximum-recorded air temperature at the plant or some percentage thereof, e.g., as derived from an accepted exceedance probability percentage.
  • the design ambient air temperature may be used to ensure that the unit will operate satisfactorily (i.e., the tubeside process fluid will reach an acceptable outlet temperature) under most or all expected operating conditions. In conditions exceeding the design ambient air temperature, some or all of the capabilities of the process may have to be taken offline or otherwise operate at less than optimal efficiency and/or performance.
  • a design challenge may arise when the applied design ambient air temperature only affects the process for a limited window of time, e.g., seasons, months, weeks, days, or less.
  • a maximum ambient air temperature that decreases the temperature difference between the inlet air to the unit and the desired outlet of the tubeside process fluid may control the design of the ACHE.
  • This design practice decreases the heat transfer driving force, increases the required heat transfer area, and increases the unit's footprint.
  • Customary solutions for reaching the desired tubeside outlet temperature in such situations include requiring an additional kit before reaching the next unit operation. These and other solutions are based on an expected maximum air ambient temperature that may occur only for relatively brief periods throughout the operating year. Similar challenges may arise when climates, climate patterns, and/or operating environments change and cause a mismatch between the design ambient air temperature and actual ambient air temperatures, or when system efficiencies decrease over time and the former design criteria are no longer applicable to the in-use system.
  • a first coolant flows through the first exchanger and a second coolant flow through the second heat exchanger in such a manner that the first heat exchanger cools the first fluid to a first temperature and the second heat exchanger cools the first fluid from the first temperature to a second temperature that is lower than the first temperature.
  • U.S. Patent No. US 6092377 titled "Air Cooled Two Stage Condenser for Air Conditioning and Refrigeration System," describing a self-contained two-stage condenser construction for air conditioning a refrigeration system.
  • Still another example is U.S. Patent No.
  • US 6755158 titled “Vehicle Charge Air Cooler with a Pre-Cooler,” describing an air-cooled charge air cooler for vehicles with a coolant-filled pre-cooler integral with the charge air cooler.
  • the pre-cooler has flow paths carrying coolant between manifolds of the pre-cooler and the flow paths define channels there through to direct charge air through the pre-cooler and into a cooling grate of the charge cooler.
  • a final example is U.S. Patent No. US 8225852 , titled “Heat Exchanger Using Air and Liquid as Coolants,” describing a heat exchanger suitable for a vehicle which includes a plurality of tubular first members arranged in a row forming elongate gaps.
  • a first fluid passes through the formed passageways with cooling air flowing through the gaps.
  • associated cooling device circulates liquid coolant and comprises flat tube-like second members each extending into a respective gap in a secondary area, which is part of the primary area but smaller.
  • U. S. Patent Application Publication No. US-A-20110284185 titled “Thermal Fluid Temperature Converter” describes a thermal fluid temperature converter that uses temperature from a thermal fluid to preheat or precool incoming air prior to entering a building or appliance.
  • U.S. Patent Application Publication No. US-A-2009/0188651 titled “Cooler,” describes a cooler that includes a main body provided with a water tank for storing cooling water and at least one air-cooling radiating device with cooling fins assembled in the main body.
  • One embodiment includes an apparatus for conditioning an inlet air for an air-cooled heat exchanger according to claim 1.
  • Another embodiment includes a method of removing heat from a process fluid according to claim 10.
  • Still another embodiment includes an air-cooled heat exchanger system according to claim 4.
  • the disclosure includes a bundle of tubes installed below the process tube bundle (located between the fan and the tube bundle in forced flow arrangement) that carries a heat transfer medium that is colder than the ambient air to cool it before passing over the process tube bundle.
  • the air exiting this pre-cooler tube bundle possessing a lower temperature than the ambient air temperature, may increase the temperature difference between the inlet air and the desired outlet tubeside process fluid, increase the heat transfer driving force, decrease the required heat transfer area, and/or decrease the unit's footprint.
  • This cooling bundle (or bundles) may be used during times of high ambient air temperature alone or during the entire operating year to enhance the overall operating heat transfer of the unit.
  • the pre-cooler tubes may be plain, externally finned, internally finned, and/or possess numerous heat transfer enhancements familiar to those experienced in the practice.
  • the fluid in the tubes may be liquid, vapor, or a mixture of both.
  • the fluid in the tubes may even carry solid material in solution with liquid and/or vapor.
  • the ACHE system does not feed a gas combustion turbine or a vehicle.
  • pre-cooler tube bundle may be integral to the design of a new air-cooled heat exchanger (ACHE) system.
  • Other embodiments may be designed to retrofit existing ACHE systems.
  • some embodiments of the disclosed pre-cooler tube bundle may be designed as after-market components suitable to be incorporated into existing ACHE systems, e.g., due to increased inefficiency of the ACHE system, due to climate or other changes in the operating environment of the ACHE system, etc.
  • plate pack or "plate pack assembly,” as used herein, means a plurality of substantially parallel sheets or planar surfaces formed so as to create flow channels such that a cooling medium and air pass through alternating passes within the plate pack assembly.
  • a plurality of coil-in-plate sheets may be suitably employed as one or more of the constituent sheets or plates comprised within the plate pack assembly.
  • process fluid means any industrial fluid for which cooling is desired.
  • the process fluid may be a liquid, a vapor, a mixture of both, and may contain solids in solution with a liquid and/or vapor.
  • FIG. 1 is a schematic diagram of an ACHE system 100. Flow arrows are provided to illustrate the direction of airflow through the ACHE system 100.
  • the ACHE system 100 includes a tube bundle 102 having an inlet 104 and an outlet 106.
  • the tube bundle may have spiral-would fins upon the tubes, such as embedded, integral, overlapped footed, footed, bonded or other finned-tube constructions.
  • the heat exchanger tube bundle can take the form of any suitable heat exchange device, including shell-and-tube heat exchangers, plate-and-frame heat exchangers, falling-film heat exchangers, etc.
  • the tube bundle 102 may comprise a plurality of tube bundles, e.g., extending laterally in parallel and disposed such that the air outlet side of a first tube bundle feeds an air inlet side of a second tube bundle. Alternate embodiments may increase the number of tube bundles or alter the arrangement as known in the art.
  • the tube bundle 102, the inlet 104, the outlet 106, or a combination thereof may be incorporated into a housing, header, or other structure for enclosing the components, e.g., a floating header (not depicted).
  • the tube bundle 102, the inlet 104, the outlet 106, or a combination thereof may comprise temperature monitoring equipment to monitor the performance of the ACHE system 100.
  • a process fluid may be circulated, e.g., using a pump, natural circulation, etc., through the tube bundle 102 by passing or circulating the process fluid into the inlet 104 and out of the outlet 106.
  • the ACHE system 100 includes fans 108 and 110 disposed on the air inlet side of the tube bundle 102.
  • the fans 108 and 110 may be disposed on the air outlet side of the tube bundle for an induced-draft heat exchanger system design or, as illustrated in FIG. 1 , on the air inlet side of the tube bundle for a forced-draft heat exchanger system design. Still other embodiments may place one or more fans on either side of the tube bundle 102. Additionally, while two fans are illustrated, alternate embodiments may have only one or an as-desired plurality of fans.
  • the fans 108 and 110 may be driven by any suitable means known in the art, e.g., electric motors, steam turbines, compressors, etc.
  • the fans 108 and 110 may be operatively coupled to an air-flow controller (not depicted) for varying the speed of one or more of the fans 108 and 110.
  • a plenum 112 is disposed between the fans 108 and 110 and the tube bundle 102.
  • the plenum 112 may be a first plenum and a second plenum may be disposed between the tube bundle 102 and the one or more fans disposed on the air outlet side of the tube bundle 102.
  • the ACHE system 100 includes a bay comprising supporting columns 114
  • the ACHE system 100 may be mounted on, enclosed in, or semi-enclosed in a hood, shroud, or other structure (not shown) to protect the structure or components from the environment or debris, for aesthetic purposes, for sound shielding, for filtering or controlling the particulate quality of inlet air, or for other reasons.
  • Embodiments utilizing one or more external structures may optionally comprise screens, louvers, fan guards, fan rings, or other such enclosure variations within the scope of this disclosure.
  • Some embodiments of the ACHE system 100 further comprise monitoring equipment, e.g., temperature monitoring equipment for monitoring an ambient air temperature, an air inlet temperature (e.g., the temperature in plenum 112), an air outlet temperature, or any combination thereof.
  • FIG. 2 is a schematic diagram of an ACHE system 200 having a pre-cooler 202.
  • the components of the ACHE system 200 may be the same as the corresponding components of the ACHE system 100 except as otherwise noted. While depicted as disposed in the plenum 112, in alternate embodiments the pre-cooler 202 may be disposed on the inlet side of the fans 108 and 110 or in an alternate location on the air inlet side of the tube bundle 102.
  • the pre-cooler 202 may comprise a cooling coil, e.g., a plain, externally finned, internally finned, continuously finned, or a combination thereof. Alternately, the pre-cooler 202 may comprise a plate pack assembly or other suitable heat exchange structure known in the art.
  • the pre-cooler 202 has an inlet and an outlet (not depicted) for admitting a pre-cooler medium.
  • a pre-cooler medium may be circulated, e.g., using a pump, natural circulation, etc., through the pre-cooler 202 by passing or circulating the cooling medium into the inlet and out of the outlet for the pre-cooler 202.
  • the pre-cooler 202, the inlet, the outlet, or a combination thereof may comprise temperature monitoring equipment to monitor the performance of the pre-cooler.
  • the pre-cooler medium may be any suitable coolant or other cooling medium for heat transfer, for example, ammonia, sulfur dioxide, non-halogenated hydrocarbons such as propane, any of a variety of halocarbon compounds such as organofluorine compounds, organochlorine compounds, organobromine compounds, and organoiodine compounds.
  • a controller 204 is operatively coupled to the ACHE system 200 such that the controller 204 is configured to circulate the cooling medium through the pre-cooler when the ambient air temperature is above a first preselected temperature and stop circulation of the cooling medium through the pre-cooler when the ambient air temperature is below a second preselected temperature.
  • the first and second preselected temperature set-points may be preselected or dynamically adjusted based on predicted temperatures or as-measured temperatures in order to obtain the desired cooling of the air inlet to the ACHE system 200.
  • the pre-cooler 202 is further configured to circulate a warming medium through the pre-cooler 202.
  • the warming medium and the cooling medium are the same.
  • Other embodiments may substitute or replace the cooling medium of one type, e.g., liquid, with a warming medium of another type, e.g., steam.
  • the controller 204 may be configured to circulate the warming medium through the pre-cooler when the ambient air temperature is below a third preselected temperature and stop circulation of the warming medium through the pre-cooler when the ambient air temperature is above a fourth preselected temperature. Similar to the control operation for the cooling regime, the third and fourth preselected temperature set-points may be preselected or dynamically adjusted based on predicted temperatures or as-measured temperatures in order to obtain the desired warming of the air inlet to the ACHE system 200.
  • the pre-cooler 202 may be compatibly designed to retrofit existing ACHE systems or may be designed to be integrally incorporated into new ACHE systems. In either scenario, it should be apparent to those of skill in the art that the pre-cooler 202 may be incorporated without significantly changing the footprint of current ACHE systems. Further, in systems where ACHE system efficiency has degraded, e.g., due to fouling, etc., a temporary pre-cooler 202 may be installed to increase efficiency and/or maintain operations until defouling operations or maintenance can be conducted.
  • FIG. 3 is a flowchart showing a process 300 for removing heat from a process fluid using an ACHE system having a pre-cooler, e.g., the ACHE system 200 with the pre-cooler 202 of FIG. 2 .
  • the process 300 includes circulating a pre-cooler medium through a pre-cooler disposed on the air inlet side of an air-cooled heat exchanger tube bundle and circulating the process fluid through the air-cooled heat exchanger tube bundle.
  • the process 300 includes passing air to the pre-cooler, e.g., using one or more fans in a forced-draft and/or induced-draft configuration.
  • the air may be ambient air at a first temperature.
  • the process 300 includes changing the temperature of the air, e.g., by heat transfer across the pre-cooler, to create a conditioned air at a second temperature. As described above, this may include cooling the ambient air to a cooler temperature inlet air or warming the ambient air to a warmer temperature inlet air.
  • the first temperature (e.g., ambient air) may from 0.5 °C, 1 °C, 2 °C, 5 °C, 10 °C, 15 °C, 20 °C, 25 °C, 30 °C, 40 °C, 50 °C, 60 °C, 70 °C, 80 °C, or any temperature or temperature range therebetween, different from the second temperature (e.g., inlet air).
  • the second temperature e.g., inlet air
  • the process 300 includes passing the conditioned air through the air inlet side of the air-cooled heat exchanger tube bundle. This may be accomplished using the same driving force that passed the air to the pre-cooler.
  • the process 300 includes removing heat from the process fluid by heat exchange with the conditioned air, thereby creating an exhaust air.
  • the process 300 may include monitoring various parameters, e.g., the exhaust air temperature, the temperature of the plenum, the inlet and/or outlet temperature of the process fluid and/or pre-cooler medium, and changing system operation using a controller based on the as-monitored monitored conditions.
  • the controller may turn the pre-cooler system on or off, may change the pre-cooler medium from a cooling medium to a warming medium, may increase fan flow rate(s), or make other system changes or alterations.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (15)

  1. Appareil de conditionnement d'air d'admission pour un échangeur de chaleur refroidi par air, comprenant :
    un faisceau de tubes de pré-refroidisseur configuré pour faire circuler un fluide de refroidissement,
    le faisceau de tubes de pré-refroidisseur étant configuré pour extraire la chaleur de l'air circulant à travers le faisceau de tubes de pré-refroidisseur,
    le faisceau de tubes de pré-refroidisseur étant configuré pour être positionné sur un côté d'entrée d'air de l'échangeur de chaleur refroidi par air dans un plénum ; caractérisé en ce qu' un dispositif de commande, le dispositif de commande étant configuré pour faire circuler le fluide de refroidissement à travers le faisceau de tubes de pré-refroidisseur lorsque la température de l'air ambiant est au-dessus d'une première température présélectionnée et pour interrompre la circulation du fluide de refroidissement à travers le faisceau de tubes de pré-refroidisseur lorsque la température de l'air ambiant est en dessous d'une deuxième température présélectionnée.
  2. Appareil selon la revendication 1, dans lequel le pré-refroidisseur comprend une bobine de refroidissement et dans lequel la bobine de refroidissement est simple, à ailettes extérieures, à ailettes intérieures, à ailettes continues ou est constituée par une combinaison de ces caractéristiques.
  3. Appareil selon la revendication 1 ou selon la revendication 2, dans lequel le pré-refroidisseur comprend un ensemble de paquets de plaques.
  4. Système d'échangeur de chaleur refroidi par air, comprenant :
    un faisceau de tubes ayant un côté d'entrée d'air et un côté de sortie d'air ;
    un ventilateur, le ventilateur étant disposé sur le côté de sortie d'air du faisceau de tubes pour un système d'échangeur de chaleur à courant d'air induit et le ventilateur étant disposé sur le côté d'entrée d'air du faisceau de tubes pour un système d'échangeur de chaleur à courant d'air forcé ;
    un pré-refroidisseur disposé sur le côté d'entrée d'air du faisceau de tubes, le pré-refroidisseur étant configuré pour abaisser une température d'air ambiant à une température d'entrée lorsque l'on fait circuler un fluide de refroidissement à travers le pré-refroidisseur, et la température d'entrée d'air étant à l'intérieur d'une tolérance de température présélectionnée ; caractérisé en ce qu'
    un dispositif de commande, le dispositif de commande étant configuré pour faire circuler le fluide de refroidissement à travers le pré-refroidisseur lorsque la température de l'air ambiant est au-dessus d'une première température présélectionnée et pour interrompre la circulation du fluide de refroidissement à travers le pré-refroidisseur lorsque la température de l'air ambiant est en dessous d'une deuxième température présélectionnée.
  5. Système selon la revendication 4, comprenant en outre :
    un deuxième faisceau de tubes ayant un côté d'entrée et un côté de sortie ; et
    un deuxième ventilateur,
    le deuxième ventilateur étant adjacent au premier ventilateur, le premier faisceau de tubes et le deuxième faisceau de tubes s'étendant latéralement en parallèle dans une baie, et le premier faisceau de tubes étant disposé par rapport au deuxième faisceau de tubes de telle sorte que le côté de sortie d'air du premier faisceau de tubes alimente un côté d'entrée d'air du deuxième faisceau de tubes.
  6. Système selon la revendication 4 ou la revendication 5, dans lequel le pré-refroidisseur est en outre configuré pour augmenter la température de l'air ambiant à une deuxième température d'entrée lorsque l'on fait circuler un fluide de chauffage à travers le pré-refroidisseur.
  7. Système selon la revendication 4 ou selon l'une quelconque des revendications 5 et 6, dans lequel le pré-refroidisseur comprend une bobine de refroidissement et dans lequel la bobine de refroidissement est simple, à ailettes extérieures, à ailettes intérieures, à ailettes continues ou est constituée par une combinaison de ces caractéristiques.
  8. Système selon la revendication 4 ou selon l'une quelconque des revendications 5 à 7, dans lequel le pré-refroidisseur comprend un ensemble de paquets de plaques.
  9. Système selon la revendication 4 ou selon l'une quelconque des revendications 5 à 8, dans lequel le pré-refroidisseur est en outre configuré pour augmenter la température de l'air ambiant à une deuxième température d'entrée lorsque l'on fait circuler un fluide de chauffage à travers le pré-refroidisseur, et dans lequel le dispositif de commande est en outre configuré pour faire circuler le fluide de chauffage à travers le pré-refroidisseur lorsque la température de l'air ambiant est en dessous d'une troisième température présélectionnée et pour interrompre la circulation du fluide de chauffage à travers le pré-refroidisseur lorsque la température de l'air ambiant est au-dessus d'une quatrième température présélectionnée.
  10. Procédé pour extraire de la chaleur d'un fluide de processus, comprenant les étapes consistant à :
    faire circuler un fluide de pré-refroidisseur à travers un pré-refroidisseur disposé sur le côté d'entrée d'air d'un faisceau de tubes d'échangeur de chaleur refroidi par air ;
    faire circuler le fluide de processus à travers le faisceau de tubes d'échangeur de chaleur refroidi par air ;
    faire passer de l'air dans le pré-refroidisseur à une première température ;
    changer la température de l'air pour créer un air conditionné ;
    faire passer l'air conditionné à travers le côté d'entrée d'air du faisceau de tubes d'échangeur de chaleur refroidi par air ;
    extraire la chaleur du fluide de processus par échange thermique avec l'air conditionné ; et faire circuler le fluide de refroidissement à travers le pré-refroidisseur lorsqu'une température de l'air ambiant est au-dessus d'une première température présélectionnée et
    interrompre la circulation du fluide de refroidissement à travers le pré-refroidisseur lorsque la température de l'air ambiant est en dessous d'une deuxième température présélectionnée.
  11. Procédé selon la revendication 10, dans lequel la température de l'air est supérieure à la température de l'air conditionné.
  12. Procédé selon la revendication 10 ou la revendication 11, dans lequel le passage de l'air dans le pré-refroidisseur comprend le déplacement de l'air avec une pluralité de ventilateurs.
  13. Procédé selon la revendication 10, ou selon l'une quelconque des revendications 11 et 12, dans lequel le pré-refroidisseur comprend un ensemble de paquets de plaques ou une bobine de refroidissement, et dans lequel la bobine de refroidissement est simple, à ailettes extérieures, à ailettes intérieures, à ailettes continues ou est constituée par une combinaison de ces caractéristiques.
  14. Procédé selon la revendication 10 ou selon l'une quelconque des revendications 11 à 13, dans lequel le faisceau de tubes d'échangeur de chaleur refroidi par air comprend une pluralité de faisceaux de tubes disposés en parallèle dans une baie.
  15. Procédé selon la revendication 10 ou selon l'une quelconque des revendications 11 à 14, dans lequel le fluide de pré-refroidisseur comprend un composé d'halocarbure ou une vapeur.
EP15722412.2A 2014-06-26 2015-05-07 Pré-refroidisseur pour échangeurs de chaleur refroidis par air Not-in-force EP3161401B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201462017705P 2014-06-26 2014-06-26
PCT/US2015/029603 WO2015199819A1 (fr) 2014-06-26 2015-05-07 Pré-refroidisseur pour échangeurs de chaleur refroidis par air

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AU2015280652A1 (en) 2016-12-22
US20150377557A1 (en) 2015-12-31
AU2015280652B2 (en) 2017-12-14
SG11201608831YA (en) 2017-01-27
WO2015199819A1 (fr) 2015-12-30
EP3161401A1 (fr) 2017-05-03

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