US3124940A - Guelton - Google Patents

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US3124940A
US3124940A US3124940DA US3124940A US 3124940 A US3124940 A US 3124940A US 3124940D A US3124940D A US 3124940DA US 3124940 A US3124940 A US 3124940A
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plates
gas
evaporator
air
brushes
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    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/065—Removing frost by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
    • B01D1/222—In rotating vessels; vessels with movable parts
    • 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/10—Arrangements for preventing freezing
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/011—Oxygen
    • 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
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/0393—Localisation of heat exchange separate using a vaporiser
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • F17C2260/032—Avoiding freezing or defrosting

Definitions

  • Gases liquefied under pressure at low temperature, more especially liquid oxygen, are generally evaporated and heated in atmospheric evaporators capable of dealing with rates of flow of some hundreds of cubic metres per hour.
  • These evaporators generally consist of a number of parallel vertical plates to which are secured coils in which there flows the fluid to be evaporated.
  • the invention is characterized in that the frost deposited on the external surface of the evaporator is eliminated as it is formed by a continuous sweeping. This is effected by means of a system of continuously moving brushes which are constantly maintained at least partly in frictional contact with the surface to be defrosted. The temperature difference between the ambient air and the gas, on the delivery side of the evaporator, is thus reduced to about C.
  • Another advantage of the invention is that it permits of obtaining better stability of the delivery temperature of the gas in the course of the filling of one bank.
  • This variation of the delivery temperature which is about 22 C. in the case of oxygen when employing an evaporator operating without the sweeping, is reduced to only 7 C. in the case of the evaporator provided with sweeping means, which is a reduction in the variation of
  • the abovedescribed brushing device additionally comprises an original device for the automatic or manual regulation of the air delivery of the fan.
  • This regulation is hereinafter described, and it permits of further reducing the variation of the delivery temperature of the gas which, in the case of oxygen, then 3,124,940 Patented Mar. 17, 1964 does not exceed 2 C. In addition, it is possible with this regulation to adjust the said temperature to a predetermined value, regardless of the ambient temperature and humidity conditions.
  • a further advantage of the invention resides in that it is possible by means of the automatic regulation to ellect this stabilisation of the delivery temperature of the oxygen in only a few minutes, independently of the delivery pressure, while with the evaporators of the prior art the temperature of the oxygen leaving the evaporator at, for example, kg./cm. is regularly reduced, whereas it can be stabilised only after a very long time when the accumulation of frost on the plates is sufiicient to stop the formation of further layers.
  • FIGURE 1 is a view in perspective of the atmospheric evaporator.
  • FIGURE 2 illustrates a heat exchange plate with its coil.
  • FIGURE 3 is a side View of the heat exchange plates of the evaporator.
  • FIGURE 4 illustrates the details of a construction according to the invention of a brush holder 11 with its various brushes 12.
  • FIGURE 5 illustrates the mode of action exerted by the brushes on the plates and on the coils of the atmospheric evaporator.
  • FIGURE 6 diagrammatically illustrates the principle of the sweeping of the frost formed on the coil plates.
  • the atmospheric evaporator is provided with a jacket 1 containing a series of parallel plates 2, to which are secured the coils 3 in which there flows the liquefied gas to be evaporated.
  • the inlets and outlets of the various coils 3 are connected to the inlet and output collectors 4 and 5 respectively of the heater.
  • the atmospheric air is sent by the fan 6 between the plates 2.
  • a driving and reduction unit 3 shown in FIGURE 6 drives a double system of toothed pinions 9 with which there mesh the two endless chains ill.
  • the spindles of the horizontal brush holders 11 are fixed at their ends to each of the endless chains 10. In principle, there are four brush holders, but this number may vary in accordance with the desired rate of flow of gas.
  • the brush holders 11 thus circulate in each of the successive intervals between the plates, thus detaching and clearing the frost formed on the plates 2 of the heater and on the coils 3.
  • a compartment 13 illustrated in FIGURE 1, disposed between the air fan 6 and the coil plates 2, comprises the device for the automatic regulation of the delivery temperature of the gas.
  • the said device comprises a regulator 14 which controls through a system of rods 15, in accordance with the fixed adjustment, the opening or closing of the flaps 16, whereby the useful air delivery rate of the fan 6 is appropriately adjusted.
  • Regulator 14 is governed by a thermostat 20, the temperaturesensitive portion of which is in termal relation with the flow of evaporated gas leaving the evaporator.
  • the temperature-sensitive portion of thermostat Zll may be located inside the outlet collector 5 in the manner illustrated by FIGURE 2.
  • An evaporator for gas liquefied at low temperature by heat exchange with a flow of ambient air said evaporator comprising heat-exchange surfaces between which said ambient air flow passes and means for defrosting said heat-exchange surfaces which are swept by the ambient air flow, wherein the heat-exchange surfaces are formed by a plurality of tubes containing said liquefied gas and parallel metal plates afllxed to said tubes, and wherein said defrosting means comprises brushes, means for moving said brushes continuously in a single direction along a closed path at a substantially constant speed, and means for maintaining said brushes in frictional contact with said heat-exchange surfaces at least during the major part of their travel, the brush-moving means comprising at least one endless chain, to which said brushes are affixed, disposed along said closed path, and means for driving said chain in said single direction to constrain said brushes to pass successively through the intervals between said plates.

Abstract

951,136. Revaporizing liquefied gas. AIR LIQUIDE S.A. POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE. Sept. 29, 1961 [Oct. 12, 1960], No. 35325/61. Heading F4P. A method of defrosting the external surface area of an ambient air-heated evaporator for liquefied gas comprises continuously sweeping the surface to remove the frost as it is formed. The evaporator comprises a series of spacedparallel plates 2 to which are secured coils (not shown) through which flows the gas. Holders 11 carrying brushes 12 are fixed at their ends to endless chains 10 which are driven by a reduction unit 8; the brushes thus circulate in the spaces between the plates to remove frost forming on the latter. The plates are enclosed in a jacket, Fig. 1 (not shown), and atmospheric air is impelled between the plates by a fan, the delivery temperature of the gas being auto. matically regulated by movable flaps arranged to deflect from the plates a variable fraction of the air delivered by the fan.

Description

March17, 1964 Y. GUELTON 3,124,940
I DEFROSTING DEVICE FOR A LIQUEFIED GAS EVAPORATOR Filed Sept. 28, 1961 2 Sheets-Sheet 1 1 YI/A'J 605170 I March 17, 1964 Y. GUELTON 3,124,940
DEFROSTING DEVICE FOR A LIQUEFIED GAS EVAPORATOR Filed Sept. 28, 1961 2 Sheets-Sheet 2 Fl q 5 f O O O O BYJWKW United States Patent 3,124,940 DEFRUSTING DEVICE FUR A LIQUEFED GAS EVORATOR Yves Guelton, Iaris, France, assignor to LAir Liquide Societe Anonyme pour IEtude et lExploitation tles Proeetles Georges Claude Filed Sept. 23, I961, Ser. No. 141,362 Claims priority, application France Oct. 12, 1960 1 Claim. (Cl. 622-434) The present invention concerns an evaporator for liquefied gases and apparatus for carrying out the defrosting of the external surface of the evaporator.
Gases liquefied under pressure at low temperature, more especially liquid oxygen, are generally evaporated and heated in atmospheric evaporators capable of dealing with rates of flow of some hundreds of cubic metres per hour.
These evaporators generally consist of a number of parallel vertical plates to which are secured coils in which there flows the fluid to be evaporated.
Fans of several horse power send the ambient air on to the coil plates to effect the evaporation and heating of the liquid gas under good conditions.
These evaporators are disposed, more especially, in chains for the filling of pressure gas bottles, between the pumps which suck the liquid oxygen into its storage container and the banks of bottles into which these pumps force it under a pressure of, for example 150 kg./cm. Investigations made under practical conditions of utilisation indicate that with the various liquefied gases these evaporators produce a gas whose delivery temperature differs by several tens of degrees from the ambient temperature, this difference varying as a function of time and also of the humidity of the ambient air. This disadvantage is troublesome under the usual operating conditions and is explained by the low output of the evaporator, which is due to the accumulation of frost on the plates, whereby the heat exchange is very rapidly reduced.
The invention is characterized in that the frost deposited on the external surface of the evaporator is eliminated as it is formed by a continuous sweeping. This is effected by means of a system of continuously moving brushes which are constantly maintained at least partly in frictional contact with the surface to be defrosted. The temperature difference between the ambient air and the gas, on the delivery side of the evaporator, is thus reduced to about C.
Another advantage of the invention is that it permits of obtaining better stability of the delivery temperature of the gas in the course of the filling of one bank. This variation of the delivery temperature, which is about 22 C. in the case of oxygen when employing an evaporator operating without the sweeping, is reduced to only 7 C. in the case of the evaporator provided with sweeping means, which is a reduction in the variation of In a preferred embodiment of the invention, the abovedescribed brushing device additionally comprises an original device for the automatic or manual regulation of the air delivery of the fan.
This regulation is hereinafter described, and it permits of further reducing the variation of the delivery temperature of the gas which, in the case of oxygen, then 3,124,940 Patented Mar. 17, 1964 does not exceed 2 C. In addition, it is possible with this regulation to adjust the said temperature to a predetermined value, regardless of the ambient temperature and humidity conditions.
A further advantage of the invention resides in that it is possible by means of the automatic regulation to ellect this stabilisation of the delivery temperature of the oxygen in only a few minutes, independently of the delivery pressure, while with the evaporators of the prior art the temperature of the oxygen leaving the evaporator at, for example, kg./cm. is regularly reduced, whereas it can be stabilised only after a very long time when the accumulation of frost on the plates is sufiicient to stop the formation of further layers.
An embodiment of the invention will now be described.
FIGURE 1 is a view in perspective of the atmospheric evaporator.
FIGURE 2 illustrates a heat exchange plate with its coil.
FIGURE 3 is a side View of the heat exchange plates of the evaporator.
FIGURE 4 illustrates the details of a construction according to the invention of a brush holder 11 with its various brushes 12.
FIGURE 5 illustrates the mode of action exerted by the brushes on the plates and on the coils of the atmospheric evaporator.
FIGURE 6 diagrammatically illustrates the principle of the sweeping of the frost formed on the coil plates.
In accordance with the construction of FIGURES 1, 2 and 5, the atmospheric evaporator is provided with a jacket 1 containing a series of parallel plates 2, to which are secured the coils 3 in which there flows the liquefied gas to be evaporated. The inlets and outlets of the various coils 3 are connected to the inlet and output collectors 4 and 5 respectively of the heater.
The atmospheric air is sent by the fan 6 between the plates 2.
A driving and reduction unit 3 shown in FIGURE 6 drives a double system of toothed pinions 9 with which there mesh the two endless chains ill. The spindles of the horizontal brush holders 11 are fixed at their ends to each of the endless chains 10. In principle, there are four brush holders, but this number may vary in accordance with the desired rate of flow of gas. The brush holders 11 thus circulate in each of the successive intervals between the plates, thus detaching and clearing the frost formed on the plates 2 of the heater and on the coils 3.
A compartment 13 illustrated in FIGURE 1, disposed between the air fan 6 and the coil plates 2, comprises the device for the automatic regulation of the delivery temperature of the gas. The said device comprises a regulator 14 which controls through a system of rods 15, in accordance with the fixed adjustment, the opening or closing of the flaps 16, whereby the useful air delivery rate of the fan 6 is appropriately adjusted. Regulator 14 is governed by a thermostat 20, the temperaturesensitive portion of which is in termal relation with the flow of evaporated gas leaving the evaporator. For example, the temperature-sensitive portion of thermostat Zll may be located inside the outlet collector 5 in the manner illustrated by FIGURE 2.
In practice, the various advantages of the invention can be summarised by stating that an installation of evaporators equipped with the said mechanical sweeping system requires only half the number of evaporators of a system of like hourly capacity constructed in accordance with the prior art, which does not afford stability even when employed in parallel.
What I claim is:
An evaporator for gas liquefied at low temperature by heat exchange with a flow of ambient air, said evaporator comprising heat-exchange surfaces between which said ambient air flow passes and means for defrosting said heat-exchange surfaces which are swept by the ambient air flow, wherein the heat-exchange surfaces are formed by a plurality of tubes containing said liquefied gas and parallel metal plates afllxed to said tubes, and wherein said defrosting means comprises brushes, means for moving said brushes continuously in a single direction along a closed path at a substantially constant speed, and means for maintaining said brushes in frictional contact with said heat-exchange surfaces at least during the major part of their travel, the brush-moving means comprising at least one endless chain, to which said brushes are affixed, disposed along said closed path, and means for driving said chain in said single direction to constrain said brushes to pass successively through the intervals between said plates.
References Cited in the file of this patent UNITED STATES PATENTS 192,233 Cook June 19, 1877 204,200 Cook May 28, 1878 237,236 Bigelew Feb. 1, 1881 331,530 Nehrlich Dec. 1, 1885 1,027,875 Mathesius May 28, 1912 2,359,219 Jones Sept. 26, 1944 2,446,498 Underwood Aug. 3, 1948 2,998,801 Edelberg Sept. 5, 1961 FOREIGN PATENTS 237,257 Switzerland Apr. 15, 1945 676,506 Germany June 5, 1939
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FR840964A FR1276751A (en) 1960-10-12 1960-10-12 Defrost device improving the operation of atmospheric vaporizers for liquefied gases

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727651A (en) * 1971-03-17 1973-04-17 R Biever Portable high volume gas supply system
US4126015A (en) * 1976-08-20 1978-11-21 Hitachi, Ltd. Air cooling apparatus
US4226605A (en) * 1978-10-23 1980-10-07 Airco, Inc. Flameless vaporizer
US4399660A (en) * 1981-02-10 1983-08-23 Union Carbide Corporation Atmospheric vaporizer
US4438729A (en) * 1980-03-31 1984-03-27 Halliburton Company Flameless nitrogen skid unit
US4479359A (en) * 1980-10-01 1984-10-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Atmospheric heaters
GB2171191A (en) * 1985-02-19 1986-08-20 Starfrost Systems Ltd Evaporator mechanical defrost system
EP0612966A1 (en) * 1993-02-26 1994-08-31 The Boc Group, Inc. Impingement heating or cooling apparatus and method therefore
US20070012050A1 (en) * 2005-07-18 2007-01-18 Cryoquip, Inc. Thermal method for ice removal under ambient air cryogenic vaporizers
US20070017231A1 (en) * 2005-07-21 2007-01-25 Cryoquip, Inc. Method for ice removal under ambient air cryogenic vaporizers
US20070022760A1 (en) * 2005-07-27 2007-02-01 Cryoquip, Inc. Flow stability in massively parallel cryogenic vaporizers
US7493772B1 (en) * 2006-03-20 2009-02-24 Cryoquip, Inc. Enhanced natural draft vaporizer for cryogenic fluids
US7870747B1 (en) 2005-05-13 2011-01-18 Cryoquip, Inc. Fogless ambient air vaporizer
US20110030391A1 (en) * 2009-08-06 2011-02-10 Woodside Energy Limited Mechanical Defrosting During Continuous Regasification of a Cryogenic Fluid Using Ambient Air
US8662149B1 (en) 2012-11-28 2014-03-04 Robert E. Bernert, Jr. Frost free cryogenic ambient air vaporizer
CN114738822A (en) * 2022-05-10 2022-07-12 江西中聚宏新材料科技有限公司 Energy-saving air heat pump system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766952A (en) * 1985-11-15 1988-08-30 The Furukawa Electric Co., Ltd. Waste heat recovery apparatus
DE10008780A1 (en) * 2000-02-04 2001-08-09 Krytem Gmbh Method and apparatus for deliberately influencing heat exchange on evaporators for cryogenic liquids uses vertical evaporator pipes with metal ribs on outside tightly adjoining
CN112747503B (en) * 2020-12-14 2022-12-23 镇江市威胜电气有限公司 Fin evaporator and production process thereof

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US192233A (en) * 1877-06-19 Improvement in ice and refrigerating machines
US204200A (en) * 1878-05-28 Improvement in operating boiler-brooms
US237236A (en) * 1881-02-01 Air drying and refrigerating apparatus
US331530A (en) * 1885-12-01 The-main
US1027875A (en) * 1911-10-16 1912-05-28 Walther Mathesius Economizer, regenerator, and the like.
DE676506C (en) * 1937-12-25 1939-06-05 Otto & Co Gmbh Dr C Device for cleaning the support surface of metallic seals on door frames of chamber stoves
US2359219A (en) * 1943-03-26 1944-09-26 Green S Fuel Inc Means for using liquefied petroleum gases for engine fuel
CH237257A (en) * 1942-12-01 1945-04-15 Rossel Werner Device for the mechanical removal of frost on air cooler batteries.
US2446498A (en) * 1945-07-27 1948-08-03 George T Underwood Liquid air boiler
US2998801A (en) * 1958-06-23 1961-09-05 Kamco Products Inc Device for painting flagpoles, suspension cables and the like

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US192233A (en) * 1877-06-19 Improvement in ice and refrigerating machines
US204200A (en) * 1878-05-28 Improvement in operating boiler-brooms
US237236A (en) * 1881-02-01 Air drying and refrigerating apparatus
US331530A (en) * 1885-12-01 The-main
US1027875A (en) * 1911-10-16 1912-05-28 Walther Mathesius Economizer, regenerator, and the like.
DE676506C (en) * 1937-12-25 1939-06-05 Otto & Co Gmbh Dr C Device for cleaning the support surface of metallic seals on door frames of chamber stoves
CH237257A (en) * 1942-12-01 1945-04-15 Rossel Werner Device for the mechanical removal of frost on air cooler batteries.
US2359219A (en) * 1943-03-26 1944-09-26 Green S Fuel Inc Means for using liquefied petroleum gases for engine fuel
US2446498A (en) * 1945-07-27 1948-08-03 George T Underwood Liquid air boiler
US2998801A (en) * 1958-06-23 1961-09-05 Kamco Products Inc Device for painting flagpoles, suspension cables and the like

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727651A (en) * 1971-03-17 1973-04-17 R Biever Portable high volume gas supply system
US4126015A (en) * 1976-08-20 1978-11-21 Hitachi, Ltd. Air cooling apparatus
US4226605A (en) * 1978-10-23 1980-10-07 Airco, Inc. Flameless vaporizer
US4438729A (en) * 1980-03-31 1984-03-27 Halliburton Company Flameless nitrogen skid unit
US5551242A (en) * 1980-03-31 1996-09-03 Halliburton Company Flameless nitrogen skid unit
US4479359A (en) * 1980-10-01 1984-10-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Atmospheric heaters
US4399660A (en) * 1981-02-10 1983-08-23 Union Carbide Corporation Atmospheric vaporizer
GB2171191A (en) * 1985-02-19 1986-08-20 Starfrost Systems Ltd Evaporator mechanical defrost system
US5487908A (en) * 1993-02-26 1996-01-30 The Boc Group, Inc. Method and device for transmitting heating or cooling medium to a food product on a moving substrate
EP0612966A1 (en) * 1993-02-26 1994-08-31 The Boc Group, Inc. Impingement heating or cooling apparatus and method therefore
US7870747B1 (en) 2005-05-13 2011-01-18 Cryoquip, Inc. Fogless ambient air vaporizer
US20070012050A1 (en) * 2005-07-18 2007-01-18 Cryoquip, Inc. Thermal method for ice removal under ambient air cryogenic vaporizers
US20070017231A1 (en) * 2005-07-21 2007-01-25 Cryoquip, Inc. Method for ice removal under ambient air cryogenic vaporizers
US8402774B2 (en) 2005-07-21 2013-03-26 Cryoquip, Inc. Spraying water under ambient air cryogenic vaporizers
US20070022760A1 (en) * 2005-07-27 2007-02-01 Cryoquip, Inc. Flow stability in massively parallel cryogenic vaporizers
US7493772B1 (en) * 2006-03-20 2009-02-24 Cryoquip, Inc. Enhanced natural draft vaporizer for cryogenic fluids
US20110030391A1 (en) * 2009-08-06 2011-02-10 Woodside Energy Limited Mechanical Defrosting During Continuous Regasification of a Cryogenic Fluid Using Ambient Air
US8662149B1 (en) 2012-11-28 2014-03-04 Robert E. Bernert, Jr. Frost free cryogenic ambient air vaporizer
CN114738822A (en) * 2022-05-10 2022-07-12 江西中聚宏新材料科技有限公司 Energy-saving air heat pump system

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FR1276751A (en) 1961-11-24
GB951136A (en) 1964-03-04

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