US3362176A - Apparatus for supplying liquid to an upside-down dewar in a closed loop cooling system - Google Patents

Apparatus for supplying liquid to an upside-down dewar in a closed loop cooling system Download PDF

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Publication number
US3362176A
US3362176A US487685A US48768565A US3362176A US 3362176 A US3362176 A US 3362176A US 487685 A US487685 A US 487685A US 48768565 A US48768565 A US 48768565A US 3362176 A US3362176 A US 3362176A
Authority
US
United States
Prior art keywords
dewar
tube
upside
openings
cryogenic liquid
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.)
Expired - Lifetime
Application number
US487685A
Other languages
English (en)
Inventor
Damsz George Jerzy
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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
Priority to US487685A priority Critical patent/US3362176A/en
Application filed by US Philips Corp filed Critical US Philips Corp
Priority to CH1320266A priority patent/CH466345A/de
Priority to SE12313/66A priority patent/SE314222B/xx
Priority to GB40805/66A priority patent/GB1141715A/en
Priority to DE1501297A priority patent/DE1501297C3/de
Priority to NL6612855A priority patent/NL6612855A/xx
Priority to BE686866D priority patent/BE686866A/xx
Priority to FR76489A priority patent/FR1492690A/fr
Application granted granted Critical
Publication of US3362176A publication Critical patent/US3362176A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0119—Shape cylindrical with flat end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/06—Vessel construction using filling material in contact with the handled fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F17C2223/047—Localisation of the removal point in the liquid with a dip tube

Definitions

  • the present invention relates to a closed-loop, twophase flow, cryogenic system in which a cryogenic liquid is supplied to a Dewar positioned upside-down.
  • cryogenic cooling liquid In closed-loop cryogenic systems for cooling, for example, infrared detectors, it is often necessary to supply cryogenic cooling liquid to a Dewar mounted in an upsidedown position. It is an object of the present invention to provide a simple but reliable apparatus for effectively supplying cryogenic liquid to a Dewar.
  • a further object of the present invention is to diminish the evaporation losses in the Dewar due to the warm gas propelled from the end of a two-phase flow tube.
  • Another object of the present invention is the improvement in the supply of cold to the upside-down Dewar thereby causing the detector to operate more efficiently.
  • FIGURE 1 is a top view of the infrared detector of the invention.
  • FIGURE 2 is a view taken along lines 2-2 of FIG- URE 1.
  • an infrared detector 10 is mounted in such a manner that the cooling arrangements therefor in the form of a Dewar 12 is positioned in an upside-down relationship.
  • the detector 10 faces a window 13 in the Dewar.
  • a two-phase flow tube 14 supplies the detector Dewar with small droplets of cryogenic liquid suspended in the gas carrier.
  • a small amount of fibrous material 16 is positioned, such as glass wool or cotton which retains the liquid propelled therein.
  • the two-phase flow tube 14 is constituted of an entry tube portion 18 for the gas with the small droplets of liquid suspended therein.
  • the entry tube has a sharp bend 20 before entering the Dewar 12.
  • the entry tube 18 extends a considerable distance within the Dewar 12, however, adjacent to the top of the Dewar which in the present condition is the bottom thereof are a series of openings 22 located in entry tube portion 18.
  • An outlet tube 24 extends to a much smaller degree in the Dewar 12 and conducts away the gas present therein.
  • the transporting gas is at a much higher temperature than the liquid droplets, in fact, at close to ambient temperature, and the openings 22 in the entry tube portion 18 are the means by which the stream of gas is prevented from blowing against the fibrous material 16 soaked with cryogenic fluid.
  • Bend 20 functions to propel the droplets of liquid in the gas to the side of the entry tube portion 18 opposite to the openings 22.
  • the series of openings 22 are located through which part of the carry- 3,362,176 Patented Jan. 9, 1968 ing gas escapes to the outlet tube 24.
  • the remainder of the carrying gas is propelled through the end of the tube together with the droplets of cryogenic liquid. Since the portion of the escaping gas from the end of entry tube portion 18 has a much smaller velocity, then the evaporation rate of the cryogenic liquid in the fibrous material is diminished considerably.
  • Mass flow in the one two-phase flow tube was from .085 to .095 lb./hr. of N
  • Length of the two-phase flow tube was from 1 /2 to 2% feet
  • Inside diameter of the tube was from .075" to .105"
  • a device for supplying cryogenic liquid in the form of droplets suspended in a gas carrier to a Dewar mounted upside-down and having a fibrous material in the bottom thereof comprising a two-phase flow tube with an entry tube and an outlet tube, said entry tube having a bend therein adjacent to the entrance to said Dewar, and a plurality of openings in said entry tube at the location in said Dewar remote from the location of said fibrous material therein and adjacent to said bend whereby a part of said gas carrier is expelled through said openings and the cryogenic liquid is separated therefrom and flung by centrifugal force against the wall opposite to said openings while the other part of said gas carrier with said cryogenic liquid are propelled out of the end of the entry tube, said cryogenic liquid being retained by said fibrous material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US487685A 1965-09-16 1965-09-16 Apparatus for supplying liquid to an upside-down dewar in a closed loop cooling system Expired - Lifetime US3362176A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US487685A US3362176A (en) 1965-09-16 1965-09-16 Apparatus for supplying liquid to an upside-down dewar in a closed loop cooling system
SE12313/66A SE314222B (sl) 1965-09-16 1966-09-13
GB40805/66A GB1141715A (en) 1965-09-16 1966-09-13 Improvements in cryogenic apparatus
DE1501297A DE1501297C3 (de) 1965-09-16 1966-09-13 Vorrichtung für die Zufuhr einer kryogenen Flüssigkeit an ein umgekehrtes Dewargefäß
CH1320266A CH466345A (de) 1965-09-16 1966-09-13 Kühlvorrichtung mit einem wärmeisolierten Behälter, dem durch eine Zuführleitung eine in einem Trägergas tropfenförmig suspendierte kryogene Flüssigkeit zugeführt werden kann
NL6612855A NL6612855A (sl) 1965-09-16 1966-09-13
BE686866D BE686866A (sl) 1965-09-16 1966-09-14
FR76489A FR1492690A (fr) 1965-09-16 1966-09-15 Dispositif d'alimentation d'un récipient calorifugé en liquide cryogène

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US487685A US3362176A (en) 1965-09-16 1965-09-16 Apparatus for supplying liquid to an upside-down dewar in a closed loop cooling system

Publications (1)

Publication Number Publication Date
US3362176A true US3362176A (en) 1968-01-09

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ID=23936727

Family Applications (1)

Application Number Title Priority Date Filing Date
US487685A Expired - Lifetime US3362176A (en) 1965-09-16 1965-09-16 Apparatus for supplying liquid to an upside-down dewar in a closed loop cooling system

Country Status (7)

Country Link
US (1) US3362176A (sl)
BE (1) BE686866A (sl)
CH (1) CH466345A (sl)
DE (1) DE1501297C3 (sl)
GB (1) GB1141715A (sl)
NL (1) NL6612855A (sl)
SE (1) SE314222B (sl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704597A (en) * 1969-12-08 1972-12-05 Hymatic Eng Co Ltd Cooling apparatus
DE2922066A1 (de) * 1978-06-08 1979-12-13 Aga Ab Dewar-gefaess zum aufbewahren kryogener fluessigkeiten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008505300A (ja) * 2004-07-05 2008-02-21 コモンウェルス サイエンティフィック アンド インダストリアル リサーチ オーガニゼイション 気体環境中で低温装置を動作させるための方法および装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US966076A (en) * 1905-09-20 1910-08-02 Gabriel A Bobrick Refrigerating apparatus.
US2470228A (en) * 1942-06-05 1949-05-17 Hartford Empire Co Apparatus for cooling hollow glassware
US2892250A (en) * 1954-11-03 1959-06-30 Hupp Corp Method of producing photocells
US2939938A (en) * 1953-10-30 1960-06-07 Hupp Corp Infra red cell methods and applications
US2973434A (en) * 1957-12-26 1961-02-28 Texas Instruments Inc Infrared detecting cell and a mounting therefor
US3016716A (en) * 1959-08-27 1962-01-16 Harold R Walker Liquid oxygen cooler for airborne infrared cells
US3064451A (en) * 1960-01-14 1962-11-20 Union Carbide Corp Cooling head for small chambers
US3201947A (en) * 1963-09-06 1965-08-24 Little Inc A Cryogenic transport tube incorporating liquefaction apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US966076A (en) * 1905-09-20 1910-08-02 Gabriel A Bobrick Refrigerating apparatus.
US2470228A (en) * 1942-06-05 1949-05-17 Hartford Empire Co Apparatus for cooling hollow glassware
US2939938A (en) * 1953-10-30 1960-06-07 Hupp Corp Infra red cell methods and applications
US2892250A (en) * 1954-11-03 1959-06-30 Hupp Corp Method of producing photocells
US2973434A (en) * 1957-12-26 1961-02-28 Texas Instruments Inc Infrared detecting cell and a mounting therefor
US3016716A (en) * 1959-08-27 1962-01-16 Harold R Walker Liquid oxygen cooler for airborne infrared cells
US3064451A (en) * 1960-01-14 1962-11-20 Union Carbide Corp Cooling head for small chambers
US3201947A (en) * 1963-09-06 1965-08-24 Little Inc A Cryogenic transport tube incorporating liquefaction apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704597A (en) * 1969-12-08 1972-12-05 Hymatic Eng Co Ltd Cooling apparatus
DE2922066A1 (de) * 1978-06-08 1979-12-13 Aga Ab Dewar-gefaess zum aufbewahren kryogener fluessigkeiten
DE2922066C2 (de) * 1978-06-08 1983-03-10 Pharos AB, 18181 Lidingö Vakuumisoliertes Kühlgefäß zur kryogenen Kühlung tragbarer Geräte

Also Published As

Publication number Publication date
DE1501297C3 (de) 1975-10-30
NL6612855A (sl) 1967-03-17
CH466345A (de) 1968-12-15
BE686866A (sl) 1967-03-14
SE314222B (sl) 1969-09-01
DE1501297A1 (de) 1969-12-04
DE1501297B2 (de) 1975-03-06
GB1141715A (en) 1969-01-29

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