US20080128112A1 - Methods and apparatus for electronic cooling unit with unique features - Google Patents

Methods and apparatus for electronic cooling unit with unique features Download PDF

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Publication number
US20080128112A1
US20080128112A1 US11/947,174 US94717407A US2008128112A1 US 20080128112 A1 US20080128112 A1 US 20080128112A1 US 94717407 A US94717407 A US 94717407A US 2008128112 A1 US2008128112 A1 US 2008128112A1
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US
United States
Prior art keywords
heat exchanger
cooling unit
ambient air
heat
opening
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.)
Abandoned
Application number
US11/947,174
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English (en)
Inventor
William G. Wyatt
James A. Pruett
Carl Libby
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.)
Raytheon Co
Original Assignee
Raytheon Co
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 Raytheon Co filed Critical Raytheon Co
Priority to US11/947,174 priority Critical patent/US20080128112A1/en
Assigned to RAYTHEON COMPANY reassignment RAYTHEON COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WYATT, WILLIAM G., LIBBY, CARL, PRUETT, JAMES A.
Publication of US20080128112A1 publication Critical patent/US20080128112A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
    • F28D2021/0031—Radiators for recooling a coolant of cooling systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/08—Fluid driving means, e.g. pumps, fans

Definitions

  • Cooling may be as simple as using a fan to move relatively cooler air over a component that has experienced heating.
  • Typical fin-tube heat exchangers can accept water impingement during operation but they cannot operate while submerged. Also, fin-tube heat exchangers tend to suffer damage from small arms fire or shrapnel. Accordingly, there exists a need to address these and other deficiencies associated with conventional techniques.
  • the present invention includes a system and method for convection cooling for electronics.
  • the system comprises a fin-tube heat exchanger and/or the like.
  • the system may provide cooling for equipment located adjacent to and/or equipment located away from the cooling unit with a reduced likelihood of clogging due to ingestion of foreign matter such as sand.
  • FIG. 1 representatively illustrates an electronic cooling unit in accordance with a representative embodiment of the present invention
  • FIG. 2 representatively illustrates a possible installation of an electronic cooling unit in accordance with a representative embodiment of the present invention
  • FIG. 3 representatively illustrates an operational schematic of an electronic cooling unit in accordance with a representative embodiment of the present invention
  • FIG. 4 representatively illustrates additional elements that may be incorporated with an electronic cooling unit in accordance with a representative embodiment of the present invention.
  • the present invention may be described herein in terms of conventional fin-tube heat exchangers, environmental control units, and/or air conditioning systems in conjunction with one or more cooling fluids.
  • the cooling unit may comprise any number of conventional materials including but not limited to ceramics, metals, plastics, fiberglass, glass, and various other inorganic and/or organic materials.
  • fins, tubes, and/or ducting may comprise various forms, layers, sizes, thicknesses, textures and dimensions and/or the like.
  • the cooling fluid in accordance with various aspects of the present invention, may comprise any fluid, liquid/vapor or liquid/gas mixture suitable for cooling, stabilizing temperature, and/or the like.
  • fluids used in an electronic cooling unit system in accordance with various aspects of the present invention may include R134a and/or a 50/50 Propylene Glycol/Water solution.
  • an electronic cooling unit system 100 in accordance with various aspects of the present invention may be implemented in conjunction with a series closed-loop fluid cooling sections and a forced air system such as a heat exchanger and/or a fan.
  • the electronic cooling unit 100 comprises a condenser 110 , a fan 112 , an expansion valve 114 , an evaporator 116 , a compressor 118 , a pump 120 , and one or more cooling loops, such as a refrigerant loop 122 , and a coolant loop 124 .
  • the electronic cooling unit 100 may further comprise additional elements for the application and/or environment, such as fins 126 , a mounting plate, a protective covering, and/or an electronics assembly 128 .
  • the condenser 110 may comprise any system that converts a fluid from a gaseous state to a liquid state and/or may be substantially configured to exchange heat with another medium.
  • the condenser 110 may comprise a fin-tube heat exchanger such as a conventional radiator and/or air conditioning unit.
  • the condenser 110 may be set at any orientation in order to have ambient air passed through it.
  • the fins 126 may also be configured in any manner to affect heat transfer.
  • the condenser 110 may be positioned at least one of non-vertically and non-horizontally in relation to gravity and an inlet 210 in order to facilitate the passage of foreign object debris, such as sand, through the electronic cooling unit 100 without clogging.
  • the fins 126 may also be configured with a spacing that reduces the probability of foreign object debris clogging in the fin area of the condenser 110 .
  • the condenser 110 may further comprise an air duct 212 to facilitate the movement of air flow through the condenser 110 .
  • the air duct 212 may be made of any material such as ceramics, metals, plastics, fiberglass, glass, various other inorganic and organic materials and/or the like.
  • the condenser 110 may also be configured to transfer heat through multiple mediums.
  • the condenser may dissipate heat from the fluid to passing air and to another fluid such as water if the electronic cooling unit 100 was submerged during the crossing of a river.
  • the fan 112 may comprise any system that moves air through the electronic cooling unit 100 and over the condenser 110 .
  • the fan 112 may pull air through the condenser 110 and air duct 212 and/or push air through the condenser 110 and air duct 212 .
  • the fan 112 may be further configured to pull ambient air in via an inlet 210 in the electronic cooling unit 100 , through the fins 126 of the condenser 110 , and then move the air down the air duct 212 before exhausting the air through an outlet 216 on the back side of the fan 112 .
  • the fan 112 may also be adapted to cease operation on the occurrence of a specified event.
  • Specified events may include, for example, extremely cold conditions and/submersion of the cooling unit in water. Any system may be used to signal the fan 112 to stop operating, such as a moisture sensor, a thermocouple and/or the like.
  • the fan may be configured to temporarily deactivate if the electronic cooling unit 100 is submerged allowing the condenser 110 to dissipate heat directly to the surrounding water. Once the electronic cooling unit 100 is no longer submerged, the fan 112 may be reactivated and the condenser 110 may dissipate heat to the ambient air.
  • the expansion valve 114 may be configured to convert high pressure fluid into a relatively lower pressure fluid.
  • the expansion valve 114 may be configured in any manner to cause a change in pressure of the fluid, such as through a block type expansion valve and/or an internally equalized expansion valve.
  • the expansion valve 114 comprises a thermostatic expansion valve that reduces the pressure of the fluid while regulating the mass flow of the fluid.
  • the evaporator 116 may comprise any system that converts a fluid from a liquid state to a gaseous state for the purpose of exchanging heat with another medium.
  • the evaporator 116 may comprise a fin-tube heat exchanger such as a conventional radiator, an air conditioning unit, and/or a coldplate.
  • the evaporator 116 may comprise a coldplate with one or more fluid loops flowing through it.
  • the evaporator 116 may comprise a refrigerant loop 122 further comprising the fluid that passes through the condenser 110 and expansion valve 114 .
  • the fluid in the refrigerant loop 122 may comprise any fluid, liquid/vapor or liquid/gas mixture suitable for cooling, stabilizing temperature and/or the like.
  • the refrigerant may comprise R134a.
  • the refrigerant loop 122 may be used to absorb heat from a coolant loop 124 that is used to remove heat from nearby or remote sources.
  • the coolant loop 124 may be used to cool remote sources such as a radar unit.
  • the coolant loop 124 may also be configured to absorb heat from multiple sources by partitioning the fluid among several heat sources through various pipes, tubes, coldwalls, and/or the like.
  • the coolant loop 124 may further be configured to provide heating to nearby or remote sources through the addition or use of a heat source.
  • the fluid in the coolant loop may comprise a combination of a water/glycol solution.
  • the evaporator 116 may also act as a coldplate for nearby electronic assemblies.
  • the evaporator may be mounted directly to an electronics assembly and act as a coldplate.
  • the refrigerant loop 122 of the evaporator 116 may be configured to absorb heat from the electronics assembly in addition to the heat transferred by the coolant loop 124 .
  • the compressor 118 in accordance with various aspects of the present invention, converts low pressure fluid into a relatively higher pressure fluid.
  • the compressor 118 may be configured in any manner to cause a change in pressure of the fluid, e.g., a centrifugal, rotary, and/or axial compressor.
  • the pump 120 in accordance with various aspects of the present invention, converts a low pressure fluid into a relatively higher pressure fluid.
  • the pump 120 may comprise any system that causes an increase in the pressure of a fluid, e.g., a centrifugal, kinetic, or positive displacement pump.
  • the pump 120 may be configured to increase the head pressure in the coolant loop 124 .
  • the electronic cooling unit 100 may further comprise a mounting plate 410 .
  • the mounting plate 410 may be made of any material such as ceramics, metals, plastics, fiberglass, glass, various other inorganic and organic materials and/or the like.
  • the mounting plate 410 may be used to mount the electronic cooling unit 100 and other nearby components such as a projectile tube launcher 412 to a larger system such as a vehicle.
  • mounting plate 410 may also perform any appropriate function for the application of the electronic cooling unit 100 such as providing protection from small arms fire and/or shrapnel.
  • the electronic cooling unit 100 may additionally comprise a protective cover.
  • the protective cover may be made of any material such as ceramics, metals, plastics, fiberglass, glass, various other inorganic and organic materials and/or the like.
  • the protective cover may act to protect the individual elements of the electronic cooling unit 100 from external damage from sources such as small arms fire or shrapnel.
  • the protective cover may comprise an opening to facilitate air movement into and/or out of the electronic cooling unit 100 .
  • the opening may be configured in any manner that allows air to pass through the electronic cooling unit 100 .
  • the opening may comprise an opening near the inlet of the condenser 110 and a second opening near the fan 112 outlet.
  • the openings may further comprise a chevron design that allows air movement through the electronic cooling unit 100 while also hindering a direct air path from the outside the protective cover to the internal elements of the electronic cooling unit 100 .
  • the openings may also comprise a series of alternating holes in multiple layers of protective material.
  • the first layer may comprise a one-half inch thick layer of steel with one-half inch holes spaced one inch apart.
  • the second layer may be positioned at a short distance away from the first layer providing an air gap between the two layers and comprise one-half inch thick steel with similar one-half inch holes that are offset from the holes in the first layer of steel such that there is no direct line of sight between the two layers.
  • the protective cover may also be configured to be accessible to allow for the inspection, repair, cleaning, or replacement of the electronic cooling unit 100 or its individual elements.
  • the protective cover may be completely removable, hinged at one end, or comprise a removable interlocking piece of protective material.
  • the electronic cooling unit 100 may be implemented to remove heat via a coolant loop 124 and exchange heat to a refrigerant loop 122 in the evaporator 116 .
  • the heat absorbed by the refrigerant loop 122 may then be mixed with ambient air through a condenser 110 .
  • the condenser 110 may be configured to operate with a reduced likelihood of clogging from foreign object debris due to its fin 126 spacing and/or its orientation in relation to gravity.
  • an internal fan 112 may be configured to facilitate air movement into the electronic cooling unit 100 and/or through the condenser 110 .
  • the fan 112 may be deactivated if the electronic cooling unit 100 is at least partially submerged in water, such as when a vehicle is crossing a river.
  • the condenser 110 may the adapted to dissipate heat directly to the water while the electronic cooling unit 100 is at least partially submerged. The fan 112 is reactivated once the electronic cooling unit 100 is no longer submerged.
  • the electronic cooling unit 100 may include a protective cover capable of protecting internal components from damage resulting from shrapnel and/or small arms fire.
  • the electronic cooling unit 100 may be further adapted for use in an airborne application through the removal, reconfiguration, and/or addition of internal elements.
  • the fan 112 may be removed from an airborne application and RAM air used instead to facilitate heat transfer.
  • any method or process claims may be executed in any order and are not limited to the specific order presented in the claims.
  • the components and/or elements recited in any apparatus claims may be assembled or otherwise operationally configured in a variety of permutations and are accordingly not limited to the specific configuration recited in the claims.
  • the terms “comprise”, “comprises”, “comprising”, “having”, “including”, “includes” or any variation thereof are intended to reference a non-exclusive inclusion, such that a process, method, article, composition or apparatus that comprises a list of elements does not include only those elements recited, but may also include other elements not expressly listed or inherent to such process, method, article, composition or apparatus.
  • Other combinations and/or modifications of the above-described structures, arrangements, applications, proportions, elements, materials or components used in the practice of the present invention, in addition to those not specifically recited, may be varied or otherwise particularly adapted to specific environments, manufacturing specifications, design parameters or other operating requirements without departing from the general principles of the same.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
US11/947,174 2006-11-29 2007-11-29 Methods and apparatus for electronic cooling unit with unique features Abandoned US20080128112A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/947,174 US20080128112A1 (en) 2006-11-29 2007-11-29 Methods and apparatus for electronic cooling unit with unique features

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86773206P 2006-11-29 2006-11-29
US11/947,174 US20080128112A1 (en) 2006-11-29 2007-11-29 Methods and apparatus for electronic cooling unit with unique features

Publications (1)

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US20080128112A1 true US20080128112A1 (en) 2008-06-05

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US11/947,174 Abandoned US20080128112A1 (en) 2006-11-29 2007-11-29 Methods and apparatus for electronic cooling unit with unique features

Country Status (3)

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US (1) US20080128112A1 (fr)
EP (1) EP2100203B1 (fr)
WO (1) WO2008067434A2 (fr)

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748866A (en) * 1971-04-23 1973-07-31 Owens Illinois Inc Method and apparatus for chilling mold elements
US3901124A (en) * 1970-11-26 1975-08-26 Rheinstahl Henschel Ag Tank grating
US4034804A (en) * 1971-09-23 1977-07-12 U.S. Philips Corporation Motor-car radiator
US4076072A (en) * 1975-10-09 1978-02-28 Caterpillar Tractor Co. Modular heat exchanger with pivotal cores
US4144933A (en) * 1973-10-31 1979-03-20 U.S. Philips Corporation Heat exchanger
US4186817A (en) * 1977-10-14 1980-02-05 Bauer Russell E Air inlet for armored car
US4696361A (en) * 1984-03-23 1987-09-29 Owatonna Manufacturing Company Swing-up radiator and oil cooler assembly
US4832116A (en) * 1987-12-02 1989-05-23 Deere & Company Heat exchanger with pressurized plenum
US4975803A (en) * 1988-12-07 1990-12-04 Sundstrand Corporation Cold plane system for cooling electronic circuit components
US5496154A (en) * 1994-04-18 1996-03-05 General Motors Corporation Fan drive with high torque release
US5753847A (en) * 1997-03-24 1998-05-19 United Defense Lp Grille armor applique'
US5823248A (en) * 1995-10-06 1998-10-20 Nippondenso Co., Ltd. Cooling apparatus using boiling and condensing refrigerant
US6170281B1 (en) * 1999-03-02 2001-01-09 Karl Vernon Lee Barnett Weather shield solar heat collector per reflector
US6205803B1 (en) * 1996-04-26 2001-03-27 Mainstream Engineering Corporation Compact avionics-pod-cooling unit thermal control method and apparatus
US6206085B1 (en) * 1998-06-22 2001-03-27 Carrier Corporation Mounting of a heat exchanger in an air conditioner
US6504719B2 (en) * 2001-03-30 2003-01-07 Intel Corporation Computer system that can be operated without a cooling fan
US6832407B2 (en) * 2000-08-25 2004-12-21 The Hoover Company Moisture indicator for wet pick-up suction cleaner
US6923107B2 (en) * 2002-01-26 2005-08-02 Krauss-Maffei Wegmann Gmbh & Co. Kg Armored vehicle, especially combat tank
US20060180301A1 (en) * 2000-03-21 2006-08-17 Liebert Corporation Method and apparatus for cooling electronic enclosures
US20060260562A1 (en) * 2004-05-21 2006-11-23 Gemini Energy Technologies, Inc. System and method for the co-generation of fuel having a closed-loop energy cycle
US20070272396A1 (en) * 2006-05-25 2007-11-29 Levi A Campbell Heat Exchanger With Angled Fin
US20080017360A1 (en) * 2006-07-20 2008-01-24 International Business Machines Corporation Heat exchanger with angled secondary fins extending from primary fins

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901124A (en) * 1970-11-26 1975-08-26 Rheinstahl Henschel Ag Tank grating
US3748866A (en) * 1971-04-23 1973-07-31 Owens Illinois Inc Method and apparatus for chilling mold elements
US4034804A (en) * 1971-09-23 1977-07-12 U.S. Philips Corporation Motor-car radiator
US4144933A (en) * 1973-10-31 1979-03-20 U.S. Philips Corporation Heat exchanger
US4076072A (en) * 1975-10-09 1978-02-28 Caterpillar Tractor Co. Modular heat exchanger with pivotal cores
US4186817A (en) * 1977-10-14 1980-02-05 Bauer Russell E Air inlet for armored car
US4696361A (en) * 1984-03-23 1987-09-29 Owatonna Manufacturing Company Swing-up radiator and oil cooler assembly
US4832116A (en) * 1987-12-02 1989-05-23 Deere & Company Heat exchanger with pressurized plenum
US4975803A (en) * 1988-12-07 1990-12-04 Sundstrand Corporation Cold plane system for cooling electronic circuit components
US5496154A (en) * 1994-04-18 1996-03-05 General Motors Corporation Fan drive with high torque release
US5823248A (en) * 1995-10-06 1998-10-20 Nippondenso Co., Ltd. Cooling apparatus using boiling and condensing refrigerant
US6205803B1 (en) * 1996-04-26 2001-03-27 Mainstream Engineering Corporation Compact avionics-pod-cooling unit thermal control method and apparatus
US5753847A (en) * 1997-03-24 1998-05-19 United Defense Lp Grille armor applique'
US6206085B1 (en) * 1998-06-22 2001-03-27 Carrier Corporation Mounting of a heat exchanger in an air conditioner
US6170281B1 (en) * 1999-03-02 2001-01-09 Karl Vernon Lee Barnett Weather shield solar heat collector per reflector
US20060180301A1 (en) * 2000-03-21 2006-08-17 Liebert Corporation Method and apparatus for cooling electronic enclosures
US6832407B2 (en) * 2000-08-25 2004-12-21 The Hoover Company Moisture indicator for wet pick-up suction cleaner
US6504719B2 (en) * 2001-03-30 2003-01-07 Intel Corporation Computer system that can be operated without a cooling fan
US6923107B2 (en) * 2002-01-26 2005-08-02 Krauss-Maffei Wegmann Gmbh & Co. Kg Armored vehicle, especially combat tank
US20060260562A1 (en) * 2004-05-21 2006-11-23 Gemini Energy Technologies, Inc. System and method for the co-generation of fuel having a closed-loop energy cycle
US20070272396A1 (en) * 2006-05-25 2007-11-29 Levi A Campbell Heat Exchanger With Angled Fin
US20080017360A1 (en) * 2006-07-20 2008-01-24 International Business Machines Corporation Heat exchanger with angled secondary fins extending from primary fins

Also Published As

Publication number Publication date
WO2008067434A3 (fr) 2008-09-12
EP2100203B1 (fr) 2014-03-26
EP2100203A2 (fr) 2009-09-16
WO2008067434A2 (fr) 2008-06-05
EP2100203A4 (fr) 2012-08-01

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AS Assignment

Owner name: RAYTHEON COMPANY, MASSACHUSETTS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WYATT, WILLIAM G.;PRUETT, JAMES A.;LIBBY, CARL;REEL/FRAME:020522/0022;SIGNING DATES FROM 20080206 TO 20080212

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION