EP0119934A2 - Zwangsbelüfteter Kühler mit geschlosssenem und dichtem Kreislauf - Google Patents

Zwangsbelüfteter Kühler mit geschlosssenem und dichtem Kreislauf Download PDF

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Publication number
EP0119934A2
EP0119934A2 EP84400569A EP84400569A EP0119934A2 EP 0119934 A2 EP0119934 A2 EP 0119934A2 EP 84400569 A EP84400569 A EP 84400569A EP 84400569 A EP84400569 A EP 84400569A EP 0119934 A2 EP0119934 A2 EP 0119934A2
Authority
EP
European Patent Office
Prior art keywords
fins
water
refrigerant according
tubes
notch
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.)
Withdrawn
Application number
EP84400569A
Other languages
English (en)
French (fr)
Other versions
EP0119934A3 (de
Inventor
Michel Honoré Blondeau
Stéphane Georges Jean-Marie Viannay
Marcel Augustin Joseph Jannot
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.)
Bertin Technologies SAS
Original Assignee
Bertin et Cie SA
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 Bertin et Cie SA filed Critical Bertin et Cie SA
Publication of EP0119934A2 publication Critical patent/EP0119934A2/de
Publication of EP0119934A3 publication Critical patent/EP0119934A3/de
Withdrawn legal-status Critical Current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
    • F28F25/00—Component parts of trickle coolers
    • F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
    • F28F25/06—Spray nozzles or spray pipes
    • 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
    • F28D5/00—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, using the cooling effect of natural or forced evaporation
    • F28D5/02—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, using the cooling effect of natural or forced evaporation in which the evaporating medium flows in a continuous film or trickles freely over the conduits
    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely

Definitions

  • the invention relates to a closed refrigerant with forced ventilation and sealed circuit, comprising an enclosure, open upwards, connected to forced ventilation means, means for spraying cooling water, and an exchanger circuit, in which circulates the fluid to be cooled, arranged so as to receive the water coming from the spraying means o
  • the fluid is water
  • direct evacuation could be envisaged, but this is not possible for many reasons and, in particular, to avoid thermal pollution of rivers or by due to limited water flow.
  • the water is then cooled by runoff on steps or racks in an air circulation. Cooling being a function of the height of fall, the refrigerants reach large sizes and the vaporization of part of the water forms mists which create an undesirable micro-climate.
  • the refrigerant described above would allow a reduction in dimensions compared to those of conventional towers, and the path of a small amount of vapor in the atmospheric air, resulting in a saving in cooling water and the elimination harmful micro-climates.
  • the refrigerant according to the invention has, as known, a tubular exchanger, a sprinkling of cooling, but comprises a continuous tubular exchanger preferably occupying the entire surface swept by the cooling air which can be supplied by mechanical ventilation means.
  • the efficiency of the exchanger is further increased by a particular shape of the fins provided on the tubes and by unusual operating conditions of the sprayers allowing uniform wetting of the finned tubes of the exchanger.
  • the refrigerant consists of an enclosure 1 of rectangular shape open at its upper end.
  • One of the sides of the enclosure is fitted with one or more fans 2.
  • the sealed bottom part of the enclosure serves as a collecting tank 3 for the cooling water.
  • a drain line 4 and a suction line 5 are provided on the recovery tank.
  • the suction line 5 is connected to a circulation pump 6 whose role will be explained later.
  • an exchanger 7 consisting of parallel rows of finned tubes in which the fluid to be cooled circulates from top to bottom.
  • Ramps 8 of sprayers are arranged above the upper rows of tubes and are supplied via the circulation pump 6.
  • the sprayers are distributed in a square arrangement.
  • the opening of the enclosure is provided with a separator 9 in which the flow of cooling air leaves the water droplets with which it is charged while passing through the sprayed water.
  • a compensation circuit 10 is provided which is connected to the treatment station 11 supplying the refrigerant with water cooling.
  • the industrial water commonly used in installations is generally loaded with mineral salts and suspension of organic matter.
  • the salts produce deposits on the surface of the hot exchanger tubes which are poor conductors of heat and the organic matter facilitates the proliferation of algae and foam in the recovery tanks.
  • the water is treated in the treatment station 11.
  • the water being generally loaded with calcium carbonates, these are transformed into more soluble sulfates by acidification with sulfuric acid.
  • a corrosion inhibitor is added.
  • Figure 2 shows part of the refrigerant according to section II II.
  • the exchanger 7 is formed from horizontal tubes with fins, at least partly circular, occupying the entire surface of the enclosure.
  • an element 12 of the exchanger through which the fluid to be cooled, consists of a tube formed by four sections of finned tubes, parallel in the vertical plane (FIG. 1) and offset horizontally as shown for tubes 13, 14, 15, 16 ( Figure 2).
  • the invention can also be applied to other configurations.
  • the sections of finned tubes are arranged one above the other. These sections are connected to each other by elbows welded at their ends.
  • the hot fluid arrives in a distributor (not shown) to which the inlets are connected in parallel upper 17 of elements 12, 18, 19, etc.
  • the cooled fluid is recovered in a collector (not shown) on which the lower outlets 20 of the preceding elements are connected.
  • the cooling water coming from the recovery tank is sent into ramps 8 provided at regular intervals with sprayers 21 producing a cone of droplets uniformly distributed throughout the horizontal section. This is achieved by unusual operation of the sprayers and allows uniform cooling of the tubes in the droplet line.
  • sprayers used in refrigerants, produce a cone of droplets in which they are distributed in a ring leaving an interior area almost dry.
  • sprayers at the outlet of which a mobile element carrying helical grooves allows the formation of a cone of uniformly distributed droplets.
  • a known sprayer represented in FIGS. 4 and 5, comprising a swirl chamber 22, gives, for a pressure drop in the sprayer of 0.75 bar, a hollow conical envelope of fine droplets.
  • the droplet cone allows uniform and efficient cooling of the fin tubes with low water consumption.
  • FIG. 3A Another arrangement taken to increase the efficiency of the exchanger is the notching of the lower part of the circular fins of the tubes.
  • the three upper rows of finned tubes have modified fins.
  • Figure 3 shows in section a tube with a fin notched in its lower part.
  • the notch 24 has an angular profile in the embodiment illustrated in Figure 3.
  • Other profiles could be provided.
  • the notch 24 has a curved profile, for example substantially circular.
  • the cooling water droplets properly wet the upper row (or first row) of finned tubes. Owing to the small space separating the fins of two neighboring tubes of the same horizontal row, the second row is only slightly affected by the droplets and receives almost only the runoff water coming from the upper row. The phenomenon is reproduced a fortiori for the third and fourth rows. In order for the water to pass from the fins of a hot tube of a row to the fins of a less hot tube adjacent to an immediately lower row, the droplets which stream on the fins come together in the form of drops at the ends of notch and fall on the fins of the tubes next to the next lower row.
  • the notch 24 must be such that its ends 25 (projection formed by the connection between the peripheral circular part of the fin and the notch) are plumb with the fins of the corresponding lower tubes and in vertical projection, between the wall of the tube (a) and the edge of the fin (b).
  • the dimensions of the fins and their notch are however dependent on the compactness of the exchanger which is defined to allow air circulation under low pressure without significant pressure drop.
  • the treatment station 11 comprises means for metering the acidity of the cooling water admitted by the compensation circuit 10 and for controlled discharge of the recycled cooling water.
  • This rejection controlled by a valve 30 makes it possible to eliminate the water too loaded with salts.
  • the supply of treated water makes it possible to compensate for the flow of evaporated water and the flow of deconcentration.
  • the exchanger has four horizontal rows of tubes, but it may have only two or three rows, the choice being determined by the amount of heat to be removed.
  • the exchanger consists of elements comprising four sections of finned tubes arranged according to FIG. 2.
  • the central tube has an outside diameter of approximately 25.4 mm (1 inch) and the fins, about 57 mm,
  • the tubes are distant in horizontal projection of 65 mm and in vertical projection, of 55 mm.
  • the cord subtended by the notch is 25 mm and the distance from its central part to the center of the tube, 17 mm.
  • the speed of the air delivered by the fans is between 2 and 6-m / s.
  • the air inlet temperature is 15 to 25 ° C and the humid air outlet temperature is 25 to 30 ° C.
  • the cooling water consumption per m2 of front surface of the exchanger (i.e. perpendicular to the air flow) is:
  • the evacuated thermal power is from 70 to 80 KW m- 2 .
  • the exchange coefficient is multiplied by two, without modifying the pressure drops.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP84400569A 1983-03-21 1984-03-21 Zwangsbelüfteter Kühler mit geschlosssenem und dichtem Kreislauf Withdrawn EP0119934A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8304567 1983-03-21
FR8304567A FR2543282A1 (fr) 1983-03-21 1983-03-21 Refrigerant ferme a ventilation forcee et a circuit etanche

Publications (2)

Publication Number Publication Date
EP0119934A2 true EP0119934A2 (de) 1984-09-26
EP0119934A3 EP0119934A3 (de) 1985-04-24

Family

ID=9287052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400569A Withdrawn EP0119934A3 (de) 1983-03-21 1984-03-21 Zwangsbelüfteter Kühler mit geschlosssenem und dichtem Kreislauf

Country Status (2)

Country Link
EP (1) EP0119934A3 (de)
FR (1) FR2543282A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693262A1 (fr) * 1992-07-03 1994-01-07 Sts Dispositif de refroidissement d'un liquide par un fluide tel que de l'air.
EP0687878A1 (de) * 1994-06-15 1995-12-20 BDAG Balcke-Dürr Aktiengesellschaft Verdunstungskühlturm
AU765388B2 (en) * 2000-09-22 2003-09-18 Baltimore Aircoil Company, Incorporated Circuiting arrangement for a closed circuit cooling tower
EP1439361A1 (de) * 2003-01-15 2004-07-21 Air Tech. Co., Ltd. Verdampfungswärmetauscher mit Profilierten Rohren mit wenigen oder ohne Rippen
WO2012009221A3 (en) * 2010-07-16 2012-04-26 Evapco, Inc. Evaporative heat exchange apparatus with finned elliptical tube coil assembly
WO2013026223A1 (zh) * 2011-08-19 2013-02-28 Zhang Hongsheng 一种高温水的消热器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106767014A (zh) * 2017-01-12 2017-05-31 中化重庆涪陵化工有限公司 复合肥淋浴式冷却装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE500083A (de) *
GB191316582A (en) * 1913-07-19 1914-06-25 Walter Sydney Tyler Improvements in or relating to Radiators of the Gilled-tube Type.
FR618988A (fr) * 1926-06-29 1927-03-24 Tuyère pulvérisatrice de liquides
FR1027821A (fr) * 1950-11-17 1953-05-15 Condenseur à air
GB845844A (en) * 1959-02-11 1960-08-24 Gea Luftkuhler Gesselschaft M Evaporating cooling plant
US3384165A (en) * 1966-02-03 1968-05-21 Du Pont Heat exchanger
US3791634A (en) * 1970-04-29 1974-02-12 P Phelps Cross flow tower fill of cellular construction
US3870485A (en) * 1972-03-06 1975-03-11 Japan Gasoline Cooling tower
GB2076517B (en) * 1980-05-22 1985-04-03 Tokyo Shibaura Electric Co Modifying heat exchange in tubular heat exchangers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2693262A1 (fr) * 1992-07-03 1994-01-07 Sts Dispositif de refroidissement d'un liquide par un fluide tel que de l'air.
EP0687878A1 (de) * 1994-06-15 1995-12-20 BDAG Balcke-Dürr Aktiengesellschaft Verdunstungskühlturm
AU765388B2 (en) * 2000-09-22 2003-09-18 Baltimore Aircoil Company, Incorporated Circuiting arrangement for a closed circuit cooling tower
EP1439361A1 (de) * 2003-01-15 2004-07-21 Air Tech. Co., Ltd. Verdampfungswärmetauscher mit Profilierten Rohren mit wenigen oder ohne Rippen
WO2012009221A3 (en) * 2010-07-16 2012-04-26 Evapco, Inc. Evaporative heat exchange apparatus with finned elliptical tube coil assembly
CN103080687A (zh) * 2010-07-16 2013-05-01 艾威普科公司 具有翅片椭圆管线圈组件的蒸发热交换装置
WO2013026223A1 (zh) * 2011-08-19 2013-02-28 Zhang Hongsheng 一种高温水的消热器

Also Published As

Publication number Publication date
EP0119934A3 (de) 1985-04-24
FR2543282A1 (fr) 1984-09-28

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Inventor name: BLONDEAU, MICHEL HONORE

Inventor name: VIANNAY, STEPHANE GEORGES JEAN-MARIE

Inventor name: JANNOT, MARCEL AUGUSTIN JOSEPH