WO2020191449A1 - Agent de refroidissement amélioré - Google Patents

Agent de refroidissement amélioré Download PDF

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Publication number
WO2020191449A1
WO2020191449A1 PCT/AU2020/050295 AU2020050295W WO2020191449A1 WO 2020191449 A1 WO2020191449 A1 WO 2020191449A1 AU 2020050295 W AU2020050295 W AU 2020050295W WO 2020191449 A1 WO2020191449 A1 WO 2020191449A1
Authority
WO
WIPO (PCT)
Prior art keywords
graphene
dispersing agents
coolant
mixing
combination
Prior art date
Application number
PCT/AU2020/050295
Other languages
English (en)
Inventor
Craig Nicol
David Pope
Ashok Nanjundan
Roberto Bran
Original Assignee
Graphene Manufacturing Australia Pty Ltd
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 claimed from AU2019901036A external-priority patent/AU2019901036A0/en
Application filed by Graphene Manufacturing Australia Pty Ltd filed Critical Graphene Manufacturing Australia Pty Ltd
Publication of WO2020191449A1 publication Critical patent/WO2020191449A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08—Materials not undergoing a change of physical state when used
    • C09K5/10—Liquid materials
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/15—Nano-sized carbon materials
    • C01B32/182—Graphene
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/15—Nano-sized carbon materials
    • C01B32/182—Graphene
    • C01B32/194—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2204/00—Structure or properties of graphene
    • C01B2204/20—Graphene characterized by its properties
    • C01B2204/24—Thermal properties
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2204/00—Structure or properties of graphene
    • C01B2204/20—Graphene characterized by its properties
    • C01B2204/28—Solid content in solvents
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2204/00—Structure or properties of graphene
    • C01B2204/20—Graphene characterized by its properties
    • C01B2204/32—Size or surface area
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/20—Antifreeze additives therefor, e.g. for radiator liquids

Definitions

  • the present invention relates to an enhanced coolant.
  • the present invention has particular, although not exclusive application to coolants for heat exchanger.
  • a heat exchanger is a device used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact.
  • An example of a heat exchanger is found in an internal combustion engine in which a circulating fluid, known as a coolant, flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.
  • a coolant circulating fluid
  • a coolant is a substance, typically gas, liquid and/or solid (two-phase), that is used to reduce or regulate the temperature of a system.
  • An ideal coolant has high thermal capacity, low viscosity, is low-cost, non-toxic, chemically inert and neither causes nor promotes corrosion of the cooling system.
  • the coolant can either keep its phase and stay liquid or gaseous, and/or can undergo a phase transition, with the latent heat adding to the cooling efficiency.
  • the latter when used to achieve below-ambient temperature, is more commonly known as refrigerant.
  • the preferred embodiment provides an enhanced coolant over known coolants.
  • a method for producing an enhanced coolant including:
  • the enhanced coolant may provide an increased heat transfer rate and subsequent reduction in cooling time up to 48% over existing coolants.
  • the graphene is in the form of graphene nano-particles and/or flakes added to said dispersing agents.
  • the graphene nanostructures may be manufactured from carbon gas, thereby being added in significantly lesser quantity (typically up to 100 times) than graphene otherwise manufactured from graphite to obtain a comparable result.
  • the combination may include graphene dosage rates as low as 0.001% up to 3.0%, by weight for ready to use and concentrate products.
  • the graphene nanostructures may be in the form of particles or platelets or flakes in the range of 2nm to 800nm.
  • the mixing process may involve mixing with a high shear mixer, with shear rates ranging from a minimum of 1/10,000 per second, to disperse and distribute the graphene nanostructures.
  • the mixing times may range from 9 minutes to 72 hours, dependent upon varying dispersion and distribution combinations.
  • the coolant compositions may include one or more coolants and water.
  • the method may involve adding water.
  • the water dosages may be from 0% up to 100%, by weight.
  • the coolant compositions may consist of one or more coolants.
  • the coolants may include any glycol based coolant - including one or more of Ethylene Glycol, Propylene Glycol and Glycerin.
  • the dispersing agents may include any one or more or a combination of a surfactant based dispersant, Sodium dodecyl sulphate (SDS), Cetyl trimethyl ammonium bromide (CTAB), Sodium deoxycholate (DOC) and Sodium dodecyl benzene sulphonate.
  • the dispersing agents may include any one or more of a cellulose based dispersant, Ethyl cellulose, Carboxy methyl cellulose (sodium salts included), and Dihydrolevoglucosenone.
  • the dispersing agents may include a Polyaromatic Hydrocarbon based dispersant, such as Pyrene sulfonic acid sodium salt.
  • the dispersing agents may include a Polymer based dispersant such as Polyvinyl pyrrolidone (PVP).
  • PVP Polyvinyl pyrrolidone
  • DYSPERBYK 199, DYSPERBYK 2013, DYSPERBYK 2015 and non-ionic surfactants such as Triton X-100, Brij L23, BrijOI O, Tween 20, ETHOQUAD and Adogen.
  • a manufacturing system for manufacturing an enhanced coolant including: combining means for combining graphene with one or more dispersing agents to form a combination; and
  • mixing means for mixing the combination with one or more coolant compositions.
  • a method for producing an enhanced coolant includes adding graphene nanostructures into one or more dispersing agents to form a combination.
  • the resultant combination is then high-shear mixed with one or more coolant compositions to form the graphene-enhanced coolant.
  • the graphene nanostructures are pre-manufactured from gases containing Carbon, thereby being added in significantly lesser quantity (typically up to 100 times) than graphene otherwise manufactured from graphite to obtain a comparable result.
  • the combination includes graphene dosage rates as low as 0.01 % up to 1.0%, by weight.
  • the graphene nano-particles are in the form of platelets in the range of 50nm to 200nm.
  • the mixing process may involve mixing with a high shear mixer.
  • the high- shear mixing is a process whereby fluid undergoes shear when one area of fluid travels with a different velocity relative to an adjacent area. This velocity difference creates the shear; wherein shear rates range from a minimum of 1/10,000 per second and disperse and distribute the graphene nano-particles.
  • the mixing times range from 9 minutes to 72 hours, dependent upon varying dispersion and distribution combinations required.
  • the coolant compositions can include one or more coolants and water.
  • the method may involve adding water as required.
  • the water dosages range from 0% up to 100%, by weight.
  • the coolants but not limited to Mono Ethylene Glycol, Propylene Glycol and glycerol.
  • the dispersing agents can include any one or more of a surfactant based dispersant; namely: Sodium dodecyl sulphate (SDS), Cetyl trimethyl ammonium bromide (CTAB), Sodium deoxycholate (DOC) and Sodium dodecyl benzene
  • SDS Sodium dodecyl sulphate
  • CAB Cetyl trimethyl ammonium bromide
  • DOC Sodium deoxycholate
  • BAC Sodium dodecyl benzene
  • the dispersing agents can include any one or more of a cellulose based dispersants, namely whether Ethyl cellulose, Carboxy methyl cellulose (sodium salts included), and Dihydrolevoglucosenone.
  • the dispersing agents can include a Polyaromatic Hydrocarbon based dispersant, such as a sodium salt of Pyrene sulfonic acid.
  • the dispersing agents can include a Polymer based dispersant, such as Polyvinyl pyrrolidone (PVP).
  • PVP Polyvinyl pyrrolidone
  • the dispersing agents can include any one or more of a commercially available dispersant, including but not limited to DYSPERBYK 194N, DYSPERBYK 192, DYSPERBYK 199, DYSPERBYK 2013, DYSPERBYK 2015 and non-ionic surfactants such as Triton X-100, Brij L23, BrijOI O, Tween 20, ETHOQUAD and Adogen.
  • DYSPERBYK 194N DYSPERBYK 194N
  • DYSPERBYK 192 DYSPERBYK 199
  • non-ionic surfactants such as Triton X-100, Brij L23, BrijOI O, Tween 20, ETHOQUAD and Adogen.
  • the enhanced coolant is suitable for use in heat transfer cooling processes including but not limited to:
  • HVAC Heating, Ventilation, Air Conditioning
  • Stationary power systems including gas turbines, diesel power generators,
  • Aerospace including any airplane, satellite and space rockets
  • a manufacturing system is also provided for manufacturing the enhanced coolant.
  • the system includes combining means for combining the graphene nano particles with one or more dispersing agents to form a combination.
  • the system further includes mixing means for mixing the combination with one or more coolant
  • each coolant composition consists of one or more coolants only, and no added water.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Nanotechnology (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Lubricants (AREA)

Abstract

La présente invention concerne un procédé de production d'un agent de refroidissement amélioré. Le procédé comprend la combinaison de graphène avec un ou plusieurs agents dispersants pour former une combinaison. Le procédé consiste en outre à mélanger la combinaison avec une ou plusieurs compositions de réfrigérant. Dans certains modes de réalisation, le liquide de refroidissement amélioré peut fournir un taux de transfert de chaleur accru et une réduction subséquente du temps de refroidissement allant jusqu'à 48 % par rapport à des agents de refroidissement existants.
PCT/AU2020/050295 2019-03-27 2020-03-27 Agent de refroidissement amélioré WO2020191449A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2019901036 2019-03-27
AU2019901036A AU2019901036A0 (en) 2019-03-27 Enhanced coolant

Publications (1)

Publication Number Publication Date
WO2020191449A1 true WO2020191449A1 (fr) 2020-10-01

Family

ID=72608360

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2020/050295 WO2020191449A1 (fr) 2019-03-27 2020-03-27 Agent de refroidissement amélioré

Country Status (1)

Country Link
WO (1) WO2020191449A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112852523A (zh) * 2021-03-09 2021-05-28 上海通原环保科技有限公司 一种基于石墨烯改性的可再生润滑油组合物

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110046026A1 (en) * 2009-08-18 2011-02-24 Gm Global Technology Operations, Inc. Nanographene layers and particles and lubricants incorporating the same
US20110046027A1 (en) * 2009-08-19 2011-02-24 Aruna Zhamu Nano graphene-modified lubricant
WO2017063024A1 (fr) * 2015-10-15 2017-04-20 The Australian National University Extraction de particules lamellaires d'un milieu aqueux à un milieu non aqueux
WO2017109558A1 (fr) * 2015-12-22 2017-06-29 Arcelormittal Procédé de transfert thermique entre un élément métallique ou non métallique et un fluide de transfert thermique
CN107603724A (zh) * 2017-09-22 2018-01-19 广西大学 一种石墨烯增效无需排放环保型水基切削液及其制备方法
CN109384219A (zh) * 2018-11-16 2019-02-26 新奥石墨烯技术有限公司 面向高效换热工质的纳米流体及其制备方法和换热设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110046026A1 (en) * 2009-08-18 2011-02-24 Gm Global Technology Operations, Inc. Nanographene layers and particles and lubricants incorporating the same
US20110046027A1 (en) * 2009-08-19 2011-02-24 Aruna Zhamu Nano graphene-modified lubricant
WO2017063024A1 (fr) * 2015-10-15 2017-04-20 The Australian National University Extraction de particules lamellaires d'un milieu aqueux à un milieu non aqueux
WO2017109558A1 (fr) * 2015-12-22 2017-06-29 Arcelormittal Procédé de transfert thermique entre un élément métallique ou non métallique et un fluide de transfert thermique
CN107603724A (zh) * 2017-09-22 2018-01-19 广西大学 一种石墨烯增效无需排放环保型水基切削液及其制备方法
CN109384219A (zh) * 2018-11-16 2019-02-26 新奥石墨烯技术有限公司 面向高效换热工质的纳米流体及其制备方法和换热设备

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112852523A (zh) * 2021-03-09 2021-05-28 上海通原环保科技有限公司 一种基于石墨烯改性的可再生润滑油组合物
CN112852523B (zh) * 2021-03-09 2022-12-06 山东莱克科技有限公司 一种基于石墨烯改性的可再生润滑油组合物

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