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WO2001055653A1 - Procede et appareil de fabrication d'un melange d'eau glacee - Google Patents

Procede et appareil de fabrication d'un melange d'eau glacee Download PDF

Info

Publication number
WO2001055653A1
WO2001055653A1 PCT/NL2001/000060 NL0100060W WO0155653A1 WO 2001055653 A1 WO2001055653 A1 WO 2001055653A1 NL 0100060 W NL0100060 W NL 0100060W WO 0155653 A1 WO0155653 A1 WO 0155653A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
ice
guiding member
water mixture
disposed
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.)
Ceased
Application number
PCT/NL2001/000060
Other languages
English (en)
Inventor
Pieter Jellema
Jelle Luutzen Nijdam
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.)
Solutherm BV
Original Assignee
Solutherm BV
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 Solutherm BV filed Critical Solutherm BV
Priority to AU2001234250A priority Critical patent/AU2001234250A1/en
Publication of WO2001055653A1 publication Critical patent/WO2001055653A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F25C1/16—Producing ice by partially evaporating water in a vacuum

Definitions

  • the invention relates to a method for producing an ice -water mixture by supplying water to a tubular chamber in which a pressure prevails which is so low that water is evaporated, which evaporated water freezes on a cold surface placed in the chamber, while through the evaporation heat is abstracted from the non-evaporated water, so that this is converted into an ice-water mixture, which is discharged from the chamber.
  • this is achieved in a method of the type described in the preamble, when the water is supplied along an upper edge, extending in the longitudinal direction of the tubular chamber, of a guiding member having a downwardly inclining surface, such, that it runs downward over the surface of this guiding member in a thin, film-like layer.
  • a relatively large film-like wetted surface is obtained, which has a correspondingly high evaporation capacity, i.e. the ratio between the evaporating surface and the water volume present is maximal.
  • the residence time in the housing can be set accurately and the spread in residence time is minimal.
  • the guiding member can be disposed within the housing such that it can remain substantially out of contact with the wall of the housing, so that thermal insulation of the housing is not necessary.
  • the ice-water mixture produced can be used for cooling purposes, and, due to the non-toxic character of water, is particularly suitable as cold carrier in the food and luxury food industry. To that end, it should be possible to produce the ice-water mixture on a large scale and in an economically sound manner, which possibility is offered by the present method proposed by the invention.
  • a possible field of application is on board of ships, which, however, by rolling and pitching as a result of movement of waves, can have an adverse influence on the production process. For instance, in a water bath in a housing, the water and the ice present therein may slosh, which leads to vehement and uncontrolled boiling phenomena.
  • the method according to the present invention has an additional advantage.
  • the gradient of the guiding member disposed in the housing is such, or can be chosen such, that the downward flow of the water along the guiding member proceeds continuously in all customary positions of a ship, i.e. deviations up to approximately 15° from the horizontal.
  • the ice-water mixture formed can be caught at the lower end and collected in a gutter extending in the longitudinal direction of the housing, connected to a drain.
  • this entails that mixture ending up in the gutter very near to the drain has a shorter residence time than mixture ending up in the gutter at a distance from the drain.
  • the gutter also needs to have a certain gradient, which, especially on board of ships, has to be considerable if a correct and continuous discharge is to be ensured at all times.
  • the inclining guiding member is used in an advantageous manner to bring the ice-water mixture formed to the housing drain, so that a continuous discharge is ensured at all times and differences in residence time are minimized.
  • the separately discharged partial streams are collected in an inclined discharge pipe and are discharged therefrom via a pump which, by means of a pressure difference measurement, can keep the level in the discharge pipe substantially constant.
  • the draining conditions from the housing are regulated such that the process conditions in the housing remain constant as much is possible without regulation of the supply. Controlling the process conditions by influencing the water supply to the housing would be less easy because the flow of the film of water over the guiding member would change.
  • An additional disadvantage thereof is a dead time in the control circuit, which makes it more difficult to maintain a constant water level.
  • the invention also relates to an apparatus for producing an ice-water mixture.
  • an apparatus for producing an ice-water mixture.
  • such an apparatus is provided with a tubular housing in which a guiding member is disposed with an upper edge extending in the longitudinal direction of the tubular housing and a downward inclining surface, over which guiding member a cooling body is arranged, the tubular housing being provided with means for generating therein a reduced pressure, and supply means for water and discharge means for ice-water mixture, the supply means comprising a distribution unit extending along the upper edge of the guiding member.
  • the housing will further be provided with additional provisions, for instance for periodically defrosting and discharging the water vapor precipitated on the cooling body in the form of ice, and, if so desired, means for discharging non-condensable gases from the housing.
  • the guiding member comprises a lower area, provided with at least one outflow section with converging edges and connected to discharge means in the form of a drain pipe. It will then be preferred, determined typically by the desired dimensions of the apparatus for producing ice-water mixture on a large scale, that the guiding member comprises several outflow sections each connected to a drain pipe, the pipes ending up in a collecting pipe which is arranged at a gradient. In this manner, as it were, a modularly designed apparatus is obtained, having the extra advantage that it can be enlarged in a relatively simple manner, as desired.
  • the parts susceptible to adherence of ice such as the drain pipes and the guiding member, are covered with an anti-adhesion coating.
  • a pump in the collecting pipe, a pump is included, which is connected to a control unit which can be controlled by pressure measuring means with which the level of the ice-water mixture in the discharge pipe can be determined, the process conditions can be regulated, and more specifically, kept constant in an effective manner, the film of water over the guiding member being influenced as little as possible, i.e. the water supply being interfered with as little as possible. It has already been noted that with a modular structure, the capacity of the apparatus can be relatively easily adapted as required.
  • a relatively simple enlargement of the capacity is also possible by disposing two guiding members in the housing in a mirror symmetrical manner, while, from a constructional point of view it can be preferred that the outflow sections of the two guiding members are mirror symmetrical and that in each case, two mirror symmetrically disposed outflow sections connect to one drain pipe.
  • Fig. 1 shows the apparatus in side view
  • Fig. 2 shows the guiding member in front view
  • Fig. 3 shows the guiding member in side view
  • Fig. 4 shows an apparatus with two mirror symmetrically disposed guiding members.
  • the apparatus represented in Figs. 1 - 3 is provided with a housing 1, in which by means not shown a reduced pressure can be created and in which a cooling body 2 is disposed above a guiding member 3, which, as is schematically represented in Fig. 3, is disposed at an inclination in the housing 1.
  • a supply conduit for water which, via a number of stubs 4a, can feed a distribution unit 5.
  • the distribution unit 5 is provided with a delivery slot 5a, which provides for the supply of a uniform water film, which can flow downwards along the guiding member 3.
  • the guiding member 3 is provided with a flat, plate shaped part 3a with plate side edges 3b.
  • a drain pipe 6 which is composed of two knees 6a, 6b, and a contiguous, vertically extending stub 6c, ending in a discharge pipe 7.
  • a pump 8 is included, which is operated by a control unit 9, which receives its control signals from pressure measuring means, such as a pressure sensor 10.
  • an ice-water mixture which is, for instance, suitable as cold-carrier for cooling products and processes at a temperature level of -15° to 0°C, the following steps can be taken.
  • the interior of the housing 1 is adjusted to a reduced pressure of 6 mbars. At that pressure and a temperature of approximately 0°C, the so-called triple point of water is reached, i.e. under those conditions the water can be solid, liquid or vaporous.
  • Water at 0°C brought from the supply pipe 4 via the stubs 4a into the distribution unit 5 leaves this distribution unit 5 through the delivery slot 5a, which enables the water to run downwards as a relatively thin film over the guiding member 3. Due to the conditions prevailing in the housing 1, a part of the water flowing down will evaporate. This evaporating water precipitates on the cooling body 2 and freezes there.
  • the heat abstracted through evaporation from the water flowing down along the guiding member 3 causes the formation of ice in the non-evaporated part of the water and thus the formation of the ice-water mixture.
  • This treatment of the water is extremely effective in view of the maximum ratio between evaporating surface and the volume of the water led in the form of a film over that surface.
  • the flat, plate shaped part 3a of the guiding member 3 merges into four outflow sections 3c, converging triangularly downwards, which, gradually, in cooperation with the side edges 3d, merge from a flat surface into a tubular passage, and hence smoothly change the initially flat film of water into ice-water jets which enter the drain pipes 6 and onto which, through the knees 6a and 6b, the desired flowing conditions are imposed.
  • the ice-water mixture ends up in the discharge pipe 7, while the pump 8, being controlled by the control unit 9 and the pressure sensors 10, keeps the ice-water mixture at a certain level, so that, without adjusting the water supply via the supply pipe 4, the process conditions can be kept constant.
  • the ice-water mixture can be transported to a storage tank (not shown) from which ice-water mixture for cooling purposes can be drawn as desired. Then, it can be returned to the storage tank from which water can be drawn again to be subsequently fed to an apparatus for producing the ice- water mixture.
  • Figs. 1 - 3 Although they are present, no supply and discharge conduits for the cooling body 2 are depicted. The same goes for further provisions, such as means for periodically defrosting the cooling body 2 to strip it of adherent ice and discharging water thereby formed.
  • Fig. 4 in a very schematic manner, a variant of an apparatus for producing an ice-water mixture is represented, with which variant the capacity of the apparatus can be increased without having to proportionally increase the dimensions of the apparatus.
  • two guiding members 13 are mirror symmetrically arranged.
  • the guiding members 13 are provided with mirror symmetrically disposed discharge sections 13c which collectively connect to one single drain pipe 16, which, in turn, ends in a discharge pipe (not shown).
  • the evaporating surface can be considerably enlarged without modifying the overall dimensions of the housing.
  • a guiding member for instance, could continue in an uninterrupted manner, i.e. without outflow sections, into a collecting gutter under the housing, from where the ice-water mixture formed can be discharged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'invention concerne un procédé et un appareil de fabrication d'un mélange d'eau glacée, dans lequel l'eau est passe le long d'un bord supérieur, orienté dans la direction longitudinale de la chambre tubulaire, d'un élément directionnel doté d'une surface inclinée vers la bas, de manière à ce que l'eau glisse vers le bas sur la surface de l'élément directionnel jusqu'à une couche aussi fine qu'un film. En réglant l'intérieur du logement à une pression réduite, une partie de l'eau s'évapore. Cette eau évaporée gèle sur une surface froide placée dans la chambre. Grâce à l'évaporation, la chaleur est éliminée de l'eau non-évaporée de façon à la transformer en un mélange d'eau glacée qui sort de la chambre.
PCT/NL2001/000060 2000-01-27 2001-01-29 Procede et appareil de fabrication d'un melange d'eau glacee Ceased WO2001055653A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001234250A AU2001234250A1 (en) 2000-01-27 2001-01-29 Method and apparatus for producing an ice-water mixture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1014202A NL1014202C2 (nl) 2000-01-27 2000-01-27 Werkwijze en inrichting voor het produceren van een ijs-watermengsel.
NL1014202 2000-01-27

Publications (1)

Publication Number Publication Date
WO2001055653A1 true WO2001055653A1 (fr) 2001-08-02

Family

ID=19770678

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2001/000060 Ceased WO2001055653A1 (fr) 2000-01-27 2001-01-29 Procede et appareil de fabrication d'un melange d'eau glacee

Country Status (3)

Country Link
AU (1) AU2001234250A1 (fr)
NL (1) NL1014202C2 (fr)
WO (1) WO2001055653A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1017722C2 (nl) 2001-03-28 2002-10-01 Solutherm B V Werkwijze en inrichting voor het via een afvoer verwijderen van een ijs/water-mengsel uit een houder.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2826045A (en) * 1954-10-29 1958-03-11 Dow Chemical Co Freezing apparatus
US3255603A (en) * 1964-07-21 1966-06-14 Desalination Plants Freeze crystallization apparatus for separating a solvent
US4845954A (en) * 1987-06-10 1989-07-11 Stal Refrigeration Ab Method and device for the manufacture of an ice slurry
JPH0933073A (ja) * 1995-07-17 1997-02-07 Suga Kogyo Kk 真空蒸発式氷蓄熱装置
WO1999066271A1 (fr) * 1998-06-17 1999-12-23 Craig H Randall Surgelation cryogenique de liquides
WO2000037865A1 (fr) * 1998-12-21 2000-06-29 York Refrigeration Aps. Procede et dispositif de fabrication d'un melange eau/glace

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2826045A (en) * 1954-10-29 1958-03-11 Dow Chemical Co Freezing apparatus
US3255603A (en) * 1964-07-21 1966-06-14 Desalination Plants Freeze crystallization apparatus for separating a solvent
US4845954A (en) * 1987-06-10 1989-07-11 Stal Refrigeration Ab Method and device for the manufacture of an ice slurry
JPH0933073A (ja) * 1995-07-17 1997-02-07 Suga Kogyo Kk 真空蒸発式氷蓄熱装置
WO1999066271A1 (fr) * 1998-06-17 1999-12-23 Craig H Randall Surgelation cryogenique de liquides
WO2000037865A1 (fr) * 1998-12-21 2000-06-29 York Refrigeration Aps. Procede et dispositif de fabrication d'un melange eau/glace

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 06 30 June 1997 (1997-06-30) *

Also Published As

Publication number Publication date
NL1014202C2 (nl) 2001-07-30
AU2001234250A1 (en) 2001-08-07

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