US3442093A - Apparatus and ejector for producing cold - Google Patents

Apparatus and ejector for producing cold Download PDF

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Publication number
US3442093A
US3442093A US648874A US3442093DA US3442093A US 3442093 A US3442093 A US 3442093A US 648874 A US648874 A US 648874A US 3442093D A US3442093D A US 3442093DA US 3442093 A US3442093 A US 3442093A
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pressure
medium
ejector
heat
jet tube
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US648874A
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English (en)
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Johan Andriaan Rietdijk
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US Philips Corp
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US Philips Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/462—Arrangements of nozzles with provisions for cooling the fluid
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/08—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0005—Light or noble gases
    • F25J1/0007—Helium
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/0062—Light or noble gases, mixtures thereof
    • F25J1/0065—Helium
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0276—Laboratory or other miniature devices
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/001—Ejectors not being used as compression device
    • F25B2341/0012—Ejectors with the cooled primary flow at high pressure
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/60—Expansion by ejector or injector, e.g. "Gasstrahlpumpe", "venturi mixing", "jet pumps"
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/912—Liquefaction cycle of a low-boiling (feed) gas in a cryocooler, i.e. in a closed-loop refrigerator

Definitions

  • This invention relates to apparatus for producing cold wherein fluid medium from a high pressure source is: first cooled to its inversion temperature associated with that pressure, and then expanded in an ejector and discharged to a first reservoir with vapor therefrom returning to said source; subsequently medium from the reservoir is further expanded in a throttling device, and discharged to a second reservoir with vapor therefrom being pumped in the suction inlet of the ejector.
  • the ejector has jet tube and diffuser portions through which the medium flows, and the area of the jet tube contacted by the medium or the whole jet tube is made of heat insulating material for preventing the conduction of heat through the walls of the jet tube toward the end thereof.
  • a flow of high-pressure medium is cooled in one or more heat-exchangers below the inversion temperature corresponding to the pressure of the medium, whereupon the medium is throttled to a considerably lower pressure in one or more Joule-Kelvin cocks.
  • the medium of reduced pressure may then be brought into heat-exchange with an object or medium to be cooled. If phase transition has taken place the liquid produced may, if desired, be partly removed from the machine.
  • the low-pressure vapour produced is then led off to the surroundings or back to a compressor providing the high pressure medium.
  • the present invention relates to a machine for producing cold and/ or for liquefying gases in which the disadvantages of the known machines noted above are obviated.
  • the new machine has at least one inlet for high-pressure medium which is connected to one or more heat-exchangers in which the high-pressure medium is cooled below the inversion temperature corresponding to this pressure.
  • the machine also includes at least one ejector having a jet tube to which at least part of the cooled high-pressure medium may be supplied.
  • the outlet of the ejector is connected, possibly through a first container for collecting medium of reduced pressure, (a) through one or more of the heat-exchangers to an outlet through which the medium of reduced pressure can leave the machine, (b) through one or more throttling devices and possibly a heat-exchanger to one or more further containers in which lower pressures prevail and which are connected to the suction side of the ejector.
  • An ejector is to be understood in connection with the present patent application to mean a device in which the potential energy of a high-pressure (primary) medium is changed wholly or in part to kinetic energy which is used, at least in part, for increasing the pressure of a second (secondary) medium.
  • the energy of the highpressure medium supplied to the ejector is used, at least in part, to draw oli the vapour from the container of lower pressure, and to bring this vapour to the pressure which prevails in the system of conduits through which medium of reduced pressure is removed from the machine.
  • the cold can now be delivered at a pressure which is lower than the pressure at the outlet. This affords the advantage that, in an open system, the machine can be self-blowing off and the cold is delivered at a pressure which is lower than the blowing-01f pressure.
  • the pressure ratio across the compressor can be considerably lower than is the: case in machines in which the high-pressure medium is reduced in pressure in Joule-Kelvin cocks.
  • the pressure energy of the medium supplied to the ejector is not dissipated without further use, but it also utilized to pump up the vapour from the container of lower pressure to the suction pressure of the compressor or the pressure at which the medium leaves the machine again.
  • the machine thus obtained has a higher efiiciency and a much more favourable pressure ratio in the heat-exchanger and across the compressor than is the case in machines in which Joule-Kelvin cocks are used.
  • the machine to which the invention relates is usable in particular when cold has to be delivered at very low temperatures.
  • very low temperatures are accompanied by very low vapour pressures above the liquid bath in the container of lower pressure, which causes the object to be cooled. If it is desired for example, to deliver cold at 1 Kelvin, the corresponding vapour pressure in the container of lower pressure is 0.12 mm. Hg. A very satisfactory suction action of the ejector is required to maintain the said low pressure in the further container.
  • the invention underlies the recognition of the fact that, since the medium supplied to the ejector may have a temperature which is somewhat higher than that of the medium which leaves the ejector, a certain tempera ture gradient will occur across the ejector, resulting in thermal conduction, which detrimentally affects satisfactory operation of the ejector and especially the lowest suction pressure obtainable.
  • An object of the invention is to provide a machine of the kind above referred to, whereby cold can be delivered with a higher efficiency and at lower temperatures than in known machines.
  • the machine according to the invention is character ized in regard to at least the jet tube of each ejector that at least those parts which contact the flow of medium during operation are made of a heat-insulating material. It is thus impossible for heat to be conducted through the walls of the jet tube towards the end of the jet tube, which is highly beneficial to satisfactory operation of the ejector. Not only the surface layer of the jet tube which contacts the medium flowing through it may be made of heat-insulating material, but it is also possible for the whole wall of the jet tube to be made of heatinsulating material. In another advantageous embodiment of the machine according to the invention all parts of the ejector, which during operation contact the flow of medium, are made of heat-insulating material.
  • the heat-insulating material used in accordance with the invention may be glass or synthetic material or combinations thereof.
  • the invention also relates to an ejector suitable for use in a machine according to the invention, the ejector comprising a jet tube to which high-pressure medium may be supplied, a diffuser through which medium of reduced pressure can leave the ejector, and a suction side through which medium of lower pressure may he drawn in.
  • This ejector is characterized in that those parts of the jet tube which contact the flow of medium during operation are made of a heat-insulating material.
  • FIGURE 1 shows a machine for producing cold in which an ejector is used (out of scale);
  • FIGURES 2 and 3 show, on a larger scale, two embodiments of the ejector used in the machine of FIGURE 1.
  • reference numeral 1 indicates a compressor.
  • the compressed medium first passes through a cooler 2 in which the heat of compression is dissipated, and then flows through a heat-exchanger 3 in which it exchanges heat with medium of a lower pressure.
  • the high-pressure medium is then cooled in a heat-exchanger 4 to a temperature of, for example, 60 Kelvin by means of a cooling device 5.
  • the high-pressure medium flows through a heat-exchanger 6 in which it again exchanges heat with medium of lower pressure, and is then cooled in a heat-exchanger 7 to a temperature of, for example, 15 Kelvin by means of a cooling device 8.
  • the high-pressure medium again changes heat with expanded medium in a heat-exchanger 9; the high-pressure medium then has a temperature which lies below the inversion temperature of this medium at the pressure prevailing.
  • the medium subsequently enters an ejector 10 in which it is reduced in pressure.
  • the ejector is connected to an outlet 11 which includes a container 12.
  • the vapour space of container 12 is connected through the heat-exchangers 9, 6 and 3 to the inlet side of compressor 1. Condensate from container 12 can flow through a heat-exchanger 13 and a throttle cock 14, in which the liquid is further reduced in pressure, to a container 15 in which a pressure lower than that in container 12 prevails.
  • the vapour space of container 15 communicates through heat-exchanger 13, with the suction side 16 of ejector 10.
  • a cooling coil 17 through which a medium to be cooled can flow is arranged in container 15. If desired, it is possible to replace this coil by an object to be cooled,
  • a superconductive coil such as a superconductive coil or a computing or store element of an electronic computer.
  • the medium used in this apparatus is helium.
  • Compressor 1 compresses helium to a pressure P1.
  • This high-pressure medium is cooled in the heat-exchangers 2, 3, 4, 6, 7 and 9 below the inversion temperature corresponding to this high pressure of the medium.
  • the highpressure medium is then supplied to ejector 10 in which it is reduced in pressure during which process the potential energy is converted in part into kinetic energy which in turn is used in part for bringing the low pressure medium to the required pressure.
  • the medium which leaves the ejector at a pressure P2 is collected in container 12.
  • the vapour at pressure P2 can then flow through the said heat-exchangers back to the compressor again.
  • the liquid produced is throttled in a throttle device 14 to a pressure P3 which corresponds to the temperature at which the cold is to be delivered.
  • the vapour at pressure P3 in container 15 is drawn off by the ejector 10 and brought to the pressure P2 of container 12.
  • the vapour from container 15 exchanges heat with medium of higher pressure in the heat-exchangers 13 and 18.
  • the compressor thus operates between the pressures P2 and P1 so that this compressor may be much simpler in structural respect than in machines in which throttling takes place in Joule-Kelvin cocks where the compressor operates between the pressures P3 and P1.
  • FIGURE 1 shows, by way of example, one embodiment of a machine for producing cold Which utilises an ejector. Further embodiments are described in US. patent application, Ser. No. 511,044, filed Dec. 2, 1965.
  • FIGURE 2 shows an ejector 10 on a larger scale.
  • the high-pressure medium leaves heat-exchanger 9 at a temperature of, for example, 4 Kelvin and is supplied at 20 to a jet tube portion 21 of the ejector.
  • the temperature of the medium will have decreased to a lower value, which implies that a temperature gradient decreasing from the inlet 20 to the outlet 22 of the jet tube also exists within the walls of the jet tube portion 21.
  • heat would be conducted from the inlet to the outlet of the jet tube through the wall of the jet tube and this will, of course, detrimentally affect satisfactory operation of the ejector.
  • the jet tube 21 of the ejector shown in FIGURE 2 is internally covered with a layer of a heat-insulating material 23. Now substantially no heat will be conducted through the walls of the jet tube which is naturally beneficial to the operation of the ejector and more particularly to the lowest suction pressure obtainable.
  • the ejector may be provided with a heating device arranged within or around the wall of the jet tube in order that, if fixed particles have deposited on the inner wall of the jet tube, these particles may be removed by slightly heating the jet tube.
  • a cold producing apparatus for use with fluid medium from a high pressure source comprising: (a) at least one heat exchanger for cooling said high pressure medium to below the inversion temperature corresponding to its pressure, (b) at least one ejector having a jet tube part through which at least some of said cooled high pressure medium is supplied and expanded to a lower pressure, (c) a first reservoir for collecting said expanded medium at lower pressure, (d) a throttling device for further expanding the medium from the first reservoir, (e) a secand reservoir for collecting medium from said throttling device, said second reservoir having an outlet connected to the suction side of said ejector, and (f) and at least those parts of said jet tube which are contacted by medium during operation of the apparatus, are constituted of a heat insulating material.
  • a cold producing apparatus as claimed in claim 1 wherein parts of said ejector which contact the medium flowing therethrough during operation of the apparatus, are constituted of a heat insulating material.
  • each ejector is constituted of synthetic material.
  • An ejector for use in a cold producing apparatus comprising: a jet tube through which high pressure medium is supplied, and a diffuser through which medium reduced in pressure can leave said ejector, the ejector including a suction inlet through which medium of low pressure may be drawn in, and at least those parts of said jet tube which are contacted by the medium flowing therethrough during operation of the ejector are constituted of a heating insulating material.
  • An ejector for use in a cold producing apparatus as claimed in claim 4 being constituted of glass.
  • a cold producing apparatus comprising a medium supply under high pressure and a temperature below the inversion temperature associated with said pressure, at least one ejector having a jet tube to which at least part of said high pressure medium can be supplied, at least one heat exchanger through which the outlet of said ejector communicates therewith, at least one pressure reducing device, said medium being reduced in pressure through said pressure reducing device, and the wall of said jet tube which is contacted by said medium being constituted of a heat insulating material.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)
US648874A 1966-07-01 1967-06-26 Apparatus and ejector for producing cold Expired - Lifetime US3442093A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL666609177A NL148153B (nl) 1966-07-01 1966-07-01 Ejecteur in het bijzonder geschikt voor een inrichting voor het verwekken van koude en/of voor het vloeibaar maken van gassen.

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US3442093A true US3442093A (en) 1969-05-06

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US648874A Expired - Lifetime US3442093A (en) 1966-07-01 1967-06-26 Apparatus and ejector for producing cold

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BE (1) BE700822A (enrdf_load_html_response)
CH (1) CH471975A (enrdf_load_html_response)
DE (1) DE1551318B2 (enrdf_load_html_response)
FR (1) FR1543242A (enrdf_load_html_response)
GB (1) GB1187457A (enrdf_load_html_response)
NL (1) NL148153B (enrdf_load_html_response)
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910063A (en) * 1973-04-09 1975-10-07 Philips Corp Cooling system
US3932158A (en) * 1973-08-10 1976-01-13 Linde Aktiengesellschaft System for cooling an object with coolant cycle
US4242885A (en) * 1977-12-23 1981-01-06 Sulzer Brothers Limited Apparatus for a refrigeration circuit
US4352637A (en) * 1980-06-04 1982-10-05 General Signal Corporation Jet cooling pump
US4779428A (en) * 1987-10-08 1988-10-25 United States Of America As Represented By The Administrator, National Aeronautics And Space Administration Joule Thomson refrigerator
US5287694A (en) * 1992-10-05 1994-02-22 General Electric Company Fluid channeling system
US6372019B1 (en) 1998-10-16 2002-04-16 Translang Technologies, Ltd. Method of and apparatus for the separation of components of gas mixtures and liquefaction of a gas
US20090229304A1 (en) * 2008-03-13 2009-09-17 Denso Corporation Ejector device and refrigeration cycle apparatus using the same
EP2642229A1 (de) * 2012-03-23 2013-09-25 Linde Aktiengesellschaft Luftzerlegungsanlage mit gekühlter Supraleiterstruktur
CN103776189A (zh) * 2014-01-18 2014-05-07 西安交通大学 用于热泵装置的带喷射器的补气增焓型热泵循环系统
EP3885671A1 (fr) * 2020-03-25 2021-09-29 Absolut System Systeme de regulation de la temperature d'un fluide cryogenique

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2805958C3 (de) * 1978-02-13 1981-03-19 Kraftwerk Union AG, 4330 Mülheim Düse zur adiabatischen Entspannung von Gasen
EP0108834B1 (de) * 1982-10-20 1986-06-04 GebràœDer Sulzer Aktiengesellschaft Vorrichtung zum Herstellen von flüssigem Para-Wasserstoff
DE69233539T2 (de) * 1991-09-13 2006-05-24 Kabushiki Kaisha Toshiba, Kawasaki Dampfinjektor
DE202015005698U1 (de) * 2015-08-10 2015-11-11 Gerhard Seewald Anlage zur Energiegewinnung

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US2852922A (en) * 1953-07-30 1958-09-23 Rheem Mfg Co Jet pump
US3208399A (en) * 1963-10-14 1965-09-28 Howard R Keller Ejector pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852922A (en) * 1953-07-30 1958-09-23 Rheem Mfg Co Jet pump
US3208399A (en) * 1963-10-14 1965-09-28 Howard R Keller Ejector pump

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910063A (en) * 1973-04-09 1975-10-07 Philips Corp Cooling system
US3932158A (en) * 1973-08-10 1976-01-13 Linde Aktiengesellschaft System for cooling an object with coolant cycle
US4242885A (en) * 1977-12-23 1981-01-06 Sulzer Brothers Limited Apparatus for a refrigeration circuit
US4352637A (en) * 1980-06-04 1982-10-05 General Signal Corporation Jet cooling pump
US4779428A (en) * 1987-10-08 1988-10-25 United States Of America As Represented By The Administrator, National Aeronautics And Space Administration Joule Thomson refrigerator
US5287694A (en) * 1992-10-05 1994-02-22 General Electric Company Fluid channeling system
US6372019B1 (en) 1998-10-16 2002-04-16 Translang Technologies, Ltd. Method of and apparatus for the separation of components of gas mixtures and liquefaction of a gas
US20090229304A1 (en) * 2008-03-13 2009-09-17 Denso Corporation Ejector device and refrigeration cycle apparatus using the same
US8191383B2 (en) 2008-03-13 2012-06-05 Denso Corporation Ejector device and refrigeration cycle apparatus using the same
EP2642229A1 (de) * 2012-03-23 2013-09-25 Linde Aktiengesellschaft Luftzerlegungsanlage mit gekühlter Supraleiterstruktur
CN103776189A (zh) * 2014-01-18 2014-05-07 西安交通大学 用于热泵装置的带喷射器的补气增焓型热泵循环系统
EP3885671A1 (fr) * 2020-03-25 2021-09-29 Absolut System Systeme de regulation de la temperature d'un fluide cryogenique
FR3108740A1 (fr) * 2020-03-25 2021-10-01 Absolut System Système de régulation de la température d’un fluide cryogénique

Also Published As

Publication number Publication date
NL148153B (nl) 1975-12-15
DE1551318A1 (de) 1970-03-19
FR1543242A (fr) 1968-10-25
SE313321B (enrdf_load_html_response) 1969-08-11
DE1551318B2 (de) 1976-04-22
BE700822A (enrdf_load_html_response) 1968-01-02
NL6609177A (enrdf_load_html_response) 1968-01-02
CH471975A (de) 1969-04-30
GB1187457A (en) 1970-04-08

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