WO2003091356A1 - Milieu de stockage de la chaleur, procede de production d'un milieu de stockage de la chaleur et systeme de stockage de la chaleur comprenant un milieu de stockage de la chaleur. - Google Patents

Milieu de stockage de la chaleur, procede de production d'un milieu de stockage de la chaleur et systeme de stockage de la chaleur comprenant un milieu de stockage de la chaleur. Download PDF

Info

Publication number
WO2003091356A1
WO2003091356A1 PCT/JP2003/005143 JP0305143W WO03091356A1 WO 2003091356 A1 WO2003091356 A1 WO 2003091356A1 JP 0305143 W JP0305143 W JP 0305143W WO 03091356 A1 WO03091356 A1 WO 03091356A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat storage
dispersion
oily substance
storage body
dispersant
Prior art date
Application number
PCT/JP2003/005143
Other languages
English (en)
Japanese (ja)
Inventor
Yasuhiro Matsuda
Tomomi Ieuji
Original Assignee
Nippon Shokubai Co., 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 JP2002325874A external-priority patent/JP2004161794A/ja
Application filed by Nippon Shokubai Co., Ltd. filed Critical Nippon Shokubai Co., Ltd.
Priority to AU2003231447A priority Critical patent/AU2003231447A1/en
Publication of WO2003091356A1 publication Critical patent/WO2003091356A1/fr

Links

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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
    • 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
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
    • C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the present invention relates to a heat storage body, a method for manufacturing the heat storage body, and a heat storage system using the heat storage body.
  • the present invention relates to a heat storage body, a method for manufacturing the heat storage body, and a heat storage device or a heat storage system using the heat storage body.
  • a heat storage body contains a water dispersion containing an oily substance that has heat storage properties due to phase change as an essential component, and is used for heat storage systems in large buildings such as office buildings and factories, and in cooling and heating equipment for home use. You can do this. Background art
  • Aliphatic hydrocarbons, fatty acids, and fatty acid esters are known as oil-based heat storage substances using latent heat.
  • Such oil-based heat storage materials have the property of releasing heat when the phase changes from solid to liquid, and absorbing heat when changing from the phase of liquid to solid. Attention is focused on technologies that can be used for efficiency and environmental protection. For example, as a heat storage device using a heat storage material containing an oil-based heat storage material, the heat storage material is cooled and solidified by circulating the heat storage material between a heat storage tank and a refrigerator, and the heat absorbing effect at the time of melting is cooled. Something that will be used in the future is used.
  • an oil-in-water emulsion of the oil-based heat storage material and water is prepared using a surfactant and used.
  • an emulsion type heat storage element in which an oily substance having heat storage properties due to phase change is dispersed in water, the emulsion collapses due to repeated solidification / melting due to the phase change of the heat storage element (separation of oily substance and water)
  • Japanese Patent Application Laid-Open No. 57-48082 discloses a heat storage material comprising an emulsion comprising paraffin, water and a surfactant.
  • Japanese Patent Application Laid-Open No. 2000-3303650 discloses a heat storage material comprising an emulsion using a saturated hydrocarbon with phase change, water, a surfactant and a specific nucleating agent. It has been disclosed.
  • these heat storage materials do not take into account the surfactant concentration at the heat storage temperature in water and surfactants.For example, when the heat storage material is circulated between the heat storage tank and the refrigerator In addition, there is room for contrivance to reduce the load on the circulation pump and improve the stability of the emulsion.
  • such a heat storage material is easy to adjust the freezing point, that is, to improve the heat storage efficiency by freezing and coagulating according to the heat storage device, and because the freezing temperature and the melting temperature are close to each other, it is easy to solidify during heat storage.
  • Japanese Patent Application Laid-Open No. 9-2555954 discloses a heat storage material comprising a mixture of a hydrocarbon, a surfactant, and water.
  • This heat storage material was composed of hydrocarbons, surfactants, and water.
  • the inventors of the present invention tried additional tests of the examples and confirmed that they did not fall within a specific viscosity range. Therefore, there was room for improvement to improve the fluidity and stability of the emulsion.
  • the viscosity at 25 ° C. is in a specific range, and the heat storage material dispersion is used for temperature-stratified heat storage.
  • a dispersion of fine particles of the heat storage material used is disclosed.
  • fine particles of the heat storage material are dispersed using a dispersing agent.
  • a water-soluble polymer is used as a dispersing agent, and there is room for contriving to improve the stability of the emulsion.
  • oleaginous substances are used for heat transfer media in which specific lipophilic polymer particles are held inside.
  • a heat transfer medium was obtained by adding a mixed solution of an oily substance and a monomer component containing a crosslinkable monomer to an aqueous solution containing a surfactant and polymerizing the mixture. ing.
  • Such a heat transfer medium is suitable as a heat transfer medium used in an air-conditioning system and the like because it can sufficiently prevent the oily substance from seeping out of the polymer during use.
  • suspension polymerization may be performed in the presence of a protective colloid agent.
  • phase change Japanese Patent Application Laid-Open No. 5-237373 discloses that a microcapsule containing a compound is used as a heat storage material and that a heat storage material dispersion can be obtained by adding a solvent or an additive as needed. No. 68 (pages 2-3).
  • Japanese Patent Application Laid-Open No. 422,894 (Heisei 2), regarding a medium for a heat transfer system, water as a continuous phase is mixed with tetradecane, which is one of paraffins as a heat storage material.
  • a dressing is disclosed, in which tetradecane is dispersed using a homogenizer.
  • Japanese Patent Application Laid-Open No. 2000-336365 (pages 2 and 3) discloses a heat storage material comprising an emulsion using a saturated hydrocarbon, and normal hexadecane as a saturated hydrocarbon with a phase change.
  • Japanese Patent Application Laid-Open No. 6-249587 discloses a regenerative storage system including an emulsion heat storage material, a heat storage tank, piping, a circulation pump, and a heat pump.
  • a thermal storage system When the dispersion in the heat storage material collapses and separates into an oil layer and an aqueous layer, it is necessary to use a plurality of circulation pumps to re-emulsify the collapsed dispersion, which is inefficient. There was room for ingenuity to re-emulsify the emulsion heat storage material simply and efficiently.
  • the heat storage element of this heat storage system has room for devising such points as preventing overcooling, solidifying and sufficiently improving heat storage efficiency.
  • the present invention has been made in view of the above-mentioned circumstances, and has a high fluidity at a heat storage temperature, an improved heat transfer performance, and excellent stability as a dispersion, and such a heat storage. It is an object of the present invention to provide a production method of It is another object of the present invention to provide a heat storage device or a heat storage system that can be suitably used for purposes such as labor saving and efficiency of cooling and heating energy and environmental protection.
  • the present inventors have conducted various studies on a heat storage body using an oily substance having heat storage properties due to a phase change.As a result, it has been found that a dispersion of an oily substance in an aqueous medium has high safety and is widely used in various heat storage systems. Focusing on the fact that an oily substance having a heat storage property due to a phase change can be dispersed in an aqueous medium with a dispersant to form an emulsion, it has been found suitable as a heat storage body.
  • the present invention relates to a heat storage element obtained by dispersing a mixture essentially including an oily substance having a heat storage property by a phase change, an aqueous medium, and a dispersant in an oil-in-water type. Repeated coagulation / dissolution 50 times This is a heat storage material whose volume average particle size change is within 50% of the volume average particle size before repeated solidification and dissolution.
  • the present invention also relates to a method for producing the heat accumulator, which is obtained by dispersing a mixture essentially including a crystal nucleating agent, the oily substance, the aqueous medium and the dispersant in an oil-in-water type.
  • This is also a method for manufacturing a heat storage material, which comprises changing the phase of the heat storage material and then dispersing it again.
  • the present invention also relates to a method for manufacturing the heat storage element, the method including a step of dispersing the oily substance by using a line mixer.
  • the present invention further provides a method for producing the above-mentioned heat storage material, wherein the heat storage material obtained by dispersing a mixture essentially containing the oily substance, the aqueous medium and the dispersant in an oil-in-water type.
  • This is also a method for producing a heat storage material, which comprises dispersing again using a static mixer after the phase change.
  • the present invention also provides a heat storage device or a heat storage system using the heat storage element or the heat storage element manufactured by the method for manufacturing a heat storage element.
  • the heat storage body of the present invention comprises a dispersion obtained by dispersing a mixture essentially including an oily substance having a heat storage property by a phase change, an aqueous medium, and a dispersant in an oil-in-water type.
  • the dispersion was repeatedly subjected to solidification and dissolution by phase change 50 times, and the change in the volume average particle diameter of the dispersion was within ⁇ 50% of the volume average particle diameter before the repeated solidification and dissolution.
  • the heat storage body of the present invention in the above embodiment is a heat storage body comprising an oily substance having a heat storage property by a phase change, an aqueous medium, and a dispersion containing a dispersant as essential components. It specifies the change in volume average particle size due to repeated melting.
  • the repetition of the solidification and melting means that the operation of storing heat as latent heat in an oily substance having a heat storage property due to a phase change and releasing the stored heat is repeated.
  • the volume average particle size change of the dispersion after 50 times of repetition of coagulation and melting due to the phase change of the oily substance is within 50% of that before the repetition.
  • the volume average particle diameter change is within the above range when the number of repetitions of coagulation and melting due to the phase change of the heat storage oily substance is 100 or more, more preferably , 200 times or more.
  • the number of repetitions of coagulation and melting due to the phase change of the heat storage oily substance is 100 or more, more preferably , 200 times or more.
  • the regenerator As the repetition test of the solidification Z-melting due to the phase change of the oily substance, it is preferable to put the regenerator in a sample bottle and perform the cycle test at a temperature at which the solidification Z-melting due to the phase change can be repeated.
  • a temperature at which the solidification Z-melting due to the phase change can be repeated.
  • pentadecane having a melting point of 1 ° C is used as an oily substance
  • the heat storage can be adjusted to 5 to 7 ° C.
  • the temperature of the heat storage body can be adjusted to 12 to 15 ° C.
  • the amount of change (%) in the volume average particle diameter is calculated as follows.
  • the volume average particle diameter is measured using a laser diffraction type particle size distribution measuring apparatus S ALD-30000 manufactured by Shimadzu Corporation.
  • ion exchange water is used as the measurement medium.
  • the heat storage body of the present invention preferably has a form in which the concentration of the dispersant at the heat storage temperature of the aqueous dispersant solution comprising the aqueous medium and the dispersant is 0.01 to 4 times the saturation temperature of the dispersant. ,.
  • the heat storage element of the present invention in such a preferred embodiment is obtained by dispersing an oily substance having heat storage property by a phase change in an aqueous medium using a dispersant, and the amount of the dispersant used is specified.
  • the heat storage temperature of the aqueous dispersant solution is calculated based on the dispersant concentration of the saturated solution in the above. For example, when a dispersant having a saturation concentration of 30% by mass at the heat storage temperature is used, if the amount of the dispersant used is 3% by mass, the dispersant concentration is higher than the saturation concentration. 0.1 times.
  • the dispersant concentration of the aqueous dispersant solution at the heat storage temperature is 0.01 to 4 times that of the saturated solution at the heat storage temperature of the aqueous dispersant solution.
  • the amount of dispersant used will be set.
  • the saturated solution refers to a solution in which the maximum amount of dispersant that can be dissolved in an aqueous medium is dissolved. It was done.
  • a saturated solution also includes a solution in which a maximum amount of gelling (when fluidity is lost) before reaching saturation when the dispersant is dissolved in an aqueous medium is dissolved.
  • the heat storage temperature refers to a temperature range of the heat storage body from a temperature used for storing heat to an oily substance having heat storage properties by a phase change to a temperature used for releasing heat.
  • the dispersant concentration is used in a range of 0.01 to 4 times the saturation concentration of the dispersant over the entire temperature range of the heat storage element used.
  • the concentration is less than 0.01 times the saturation concentration, the oily substance having heat storage properties cannot be sufficiently dispersed due to phase change, and if it is more than 4 times, the dispersant will precipitate and the oil It may not be involved in drop formation, and the stability of the emulsion may be reduced.
  • the concentration is 0.01 to 1 times the saturation concentration.
  • the fluidity in the heat storage temperature range is reduced, and the heat transfer performance is prevented from being reduced, and the load on the circulating pump that sends the emulsion is prevented from being increased, and the operation and effect of the present invention is suppressed. It is possible to exert more fully. More preferably, it is 0.05 times or more and 1 time or less with respect to the saturation concentration. More preferably, it is 0.1 times or more, and 0.5 times or less.
  • the dispersant When using a dispersant that has solubility in an aqueous medium, the dispersant is added in excess of the saturation concentration to form an emulsion. As a result, problems such as a decrease in heat transfer performance and an increase in the load of a circulation pump for feeding the emulsion occur.
  • the saturation concentration is significantly higher than the saturation concentration in the heat storage temperature range even if the concentration is below the saturation concentration, when the dispersant forming oil droplets comes off and migrates to the water side, it precipitates and forms oil droplets. And the stability of the emulsion is reduced.
  • the heat storage body of the present invention comprises: an oily substance having heat storage property by the phase change; an aqueous medium; and an oil-in-water droplet dispersion for heat storage, which essentially includes the dispersant.
  • the viscosity of the dispersion at a temperature of 4 ° C. is 5 to 200 O m Pa ⁇ s, when the content of is 50 mass%.
  • the dispersion when the content of the oily substance in the dispersion is 50% by mass, the dispersion has a viscosity of 5 to 200 OmPas at a temperature of 4 ° C. In a preferred embodiment, the dispersion has a viscosity of 5 to 100 OmPas, more preferably a viscosity of 5 to 500 mPas. If the viscosity exceeds 200 OmPas, the fluidity will decrease and a load may be applied to the pump that sends the heat storage material. In addition, the increase in viscosity may cause a decrease in heat conductivity.
  • the viscosity is less than 5 mPa ⁇ s, it is necessary to adjust the content of the oily substance contained in the dispersion to less than 50% by mass. As the amount of the oily substance decreases, the amount of heat storage decreases, and the performance of the heat storage body decreases, which is also a preferable form for the heat storage body.
  • the measurement of the viscosity in the present invention is performed at 4 ° C. using a B 8 L type (manufactured by Tokimec) viscometer.
  • the heat storage body of the present invention comprises an oily substance having heat storage property by the phase change, the aqueous medium, and an oil-in-water drop type storage medium for heat storage which essentially contains the dispersant.
  • an oil-in-water dispersion for heat storage that requires an oily substance, an aqueous medium, and a dispersant, the content of the oily substance in the dispersion is reduced to 50 mass after the solidification and melting of the oily substance in the dispersion is changed. %, And the viscosity of the dispersion at a temperature of 4 ° C. is preferably 5 to 200 OmPa ⁇ s.
  • the heat storage body of the present invention is an oil-in-water dispersion for heat storage essentially including an oily substance having a heat storage property by a phase change, an aqueous medium, and a dispersant.
  • the viscosity after the operation is specified.
  • Solidification Z-melting phase change refers to the work of storing heat as latent heat in an oily substance having heat storage properties by phase change and radiating the stored heat.In the present invention, solidification / melting is performed only once. This includes cases in which such activities are performed.
  • the phase change of the solidification Z-melting of the oily substance can be carried out using the same method as the method described for the repetition test of the solidification-no-melting.
  • the heat storage can be performed in a heat storage water tank for storing the heat storage provided in the heat storage device or the heat storage system, in a pipe for transmitting the heat storage, or in a heat exchanger.
  • phase change of the solidification Z melting of the oily substance may be repeatedly performed.
  • the number of repetitions of the phase change due to solidification Z melting of the oily substance having heat storage properties is preferably 50 times or more, and more preferably 100 times or more.
  • the smaller the viscosity change due to the deterioration of the heat storage body the more stable the use over a long period of time.
  • the heat storage body of the present invention is used in the presence or coexistence of metal.
  • metal Normally, when a dispersion is dispersed in an aqueous medium and is stabilized in the form of an emulsion with a surfactant, it is considered that the presence of a metal reduces the surfactant activity and makes the dispersion unstable.
  • the dispersion is stabilized under metal contact and / or coexistence of metal.
  • the heat storage body is used in a pipe or a heat exchanger formed of metal parts, for example, so that the aqueous medium and Z or the dispersion contain metal. More preferably, it is used for a heat storage device or a heat storage system.
  • the heat storage system is equipped with a heat storage device in which the heat storage material is stored, a heat exchanger, and piping for circulation between the heat exchanger.
  • Pipes and heat exchangers that the heat storage body contacts are made of metal parts such as iron, copper, stainless steel, zinc, and aluminum.
  • the aqueous medium and Z or the dispersion contain the metal.
  • the amount of the metal present is, for example, 1 ppm or more, more preferably 100 ppm or more, and 500 ppm or less.
  • the present invention also provides an oil-in-water dispersion for heat storage, which essentially comprises an oily substance having a heat storage property due to a phase change, an aqueous medium, and a dispersant, wherein the oil-in-water dispersion is in contact with a metal component used in a heat storage system.
  • the dispersant preferably has a cloud point higher than the heat storage temperature.
  • the dispersant contains a nonionic surfactant as an essential component
  • an aqueous dispersant solution is formed by the aqueous medium and the dispersant that constitute the heat storage body.
  • the cloud point of the dispersant is higher than the heat storage temperature.
  • the cloud point means the temperature at which the transparent aqueous solution starts to become cloudy when the temperature of the aqueous solution of the nonionic surfactant is increased.
  • a nonionic surfactant as an emulsifier, it is important that the heat storage temperature range be below the cloud point.
  • the dispersant is prevented from separating and the stability of the emulsion is reduced, and the fluidity of the heat storage material is improved, and the heat transfer of the heat storage material is improved.
  • the performance can be improved, and the load on the circulating pump that sends the heat storage material can be further reduced.
  • the cloud point of the aqueous solution of the dispersant is higher by 5 ° C. or more than the heat storage temperature. More preferably, the temperature is 10 ° C. or higher.
  • the heat storage body of the present invention preferably does not include a crosslinked gel body containing an oily substance having a heat storage property due to a phase change or a substance encapsulated in a capsule coating.
  • a crosslinked gel of an oily substance or a substance encapsulated by a force capsule coating By not including such a crosslinked gel of an oily substance or a substance encapsulated by a force capsule coating, the fluidity of the heat storage body in the heat storage temperature region is improved, and as a result, the transfer of the heat storage body is caused. It is possible to improve the thermal performance and further reduce the load on the circulation pump that sends the heat storage material.
  • the crosslinked gel body containing an oily substance having heat storage property due to the phase change is an oily substance A mixture of an oily substance having heat storage property due to phase change and a monomer component containing a crosslinkable monomer in an aqueous solution containing a dispersant, that is, a substance retained inside a lipophilic polymer particle. And polymerization.
  • the one encapsulated by the capsule coating includes the encapsulation method by the composite emulsion method, the method of spraying the thermoplastic resin on the surface of the heat storage material particles, the method of forming the thermoplastic resin in the liquid on the surface of the heat storage material particles, Examples thereof include those obtained by methods such as a method of polymerizing and coating a monomer on the surface of the heat storage material particles and a method of manufacturing a polyamide film microcapsule by an interfacial polycondensation reaction.
  • the oily substance in the present invention has heat storage properties due to a phase change.
  • it has latent heat storage utilizing latent heat at the time of phase change or phase transition as heat storage, has a high heat storage density, and is capable of storing and releasing heat near a certain temperature. This makes it possible to store and release thermal energy such as sensible heat storage, latent heat storage, and chemical reaction storage.
  • components constituting the oily substance hydrocarbon compounds such as paraffin or ⁇ - old Refuin; higher fatty acids; higher fatty acid esters; a suitable compound such as higher alcohols, specifically, C 14 Intermediate paraffin which is liquid at normal temperature, such as paraffin, C 15 paraffin, C 16 paraffin; c 17 paraffin, c 18 paraffin, C 19 paraffin, C 20 paraffin, C 21 paraffin, C 22 paraffin, C 23 paraffin, C Higher paraffin such as 24 paraffin and C 25 paraffin which is solid at about normal temperature; higher alcohol such as 1-decanol is preferable.
  • hydrocarbon compounds such as paraffin or ⁇ - old Refuin
  • higher fatty acids such as C 15 paraffin, C 16 paraffin
  • c 17 paraffin, c 18 paraffin C 19 paraffin
  • C 20 paraffin C 21 paraffin, C 22 paraffin, C 23 paraffin
  • C Higher paraffin such as 24 paraffin and C 25 paraffin which is solid at about normal temperature
  • higher alcohol such as 1-decanol is
  • the heat storage for building air-conditioning uses liquids at normal temperature (25 ° C) and normal pressure (approximately 101.3 kPa) due to phase change. It is preferable to use it as a component constituting an oily substance having heat storage properties.
  • paraffin is preferred because it is easily available and can easily and stably produce a heat storage medium that can be used in a wide temperature range. It preferably contains pentadecane.
  • the melting point can be adjusted to the heat storage temperature to be used by arbitrarily adjusting the type and the mixing ratio of the oily substance having heat.
  • an oily substance having heat storage properties due to a phase change having a melting point of about 5 to 20 ° C may be selected.
  • an oily substance having a heat storage property by a phase change having a melting point of about 40 to 60 ° C may be selected.
  • the oily substance constituting the heat storage body of the present invention comprises: (1) three or more components, and the dispersion of the mass fraction of each component is 0.3 or more and 0.5 or less; or (2) It is preferable that the composition be composed of two or more components, and that the dispersion of the mass fraction of each component be 0.9 or more and less than 1.0.
  • the dispersion of the mass fraction of each component is preferably 0.35 or more and 0.45 or less, and in the case of (2), it is preferably 0.3. 920 or more and 0.998 or less.
  • the dispersion (V) of the mass fraction of each of the above components is a value determined by the following equation.
  • ⁇ represents the number of components constituting the oily substance.
  • X represents the mass fraction of each component when the total mass of the oily substance is set to 1.
  • the variance (V) obtained by the above equation is 0, it means that all the components constituting the oily substance are the same amount, and if the variance (V) is 1.0, the oily substance is formed. It means that the component is a single component (one component makes up 100% of the oily substance).
  • the variance is calculated by the following formula. ⁇ ⁇ 2- ( ⁇ ⁇ , 2
  • n (n- ⁇ ) In the formula, n and x are the same as above.
  • the case where there is no dispersion irrespective of the number of components constituting the oily substance (when one component constitutes 100% of the oily substance) is 1.0
  • the case where the dispersion is the maximum (oil (When all the components that make up the active substance are the same amount) is set to 0, so that the calculation formula of the VAR function is multiplied by the number of components n so that it becomes 0 to 1.0. Therefore, the formula for calculating the variance (V) of the mass fraction of each component is obtained by multiplying the VAR function formula by the number of components n.
  • one compound constitutes one component.
  • each compound has one component. Ingredients.
  • the oily substance in the above-mentioned form (1) is preferably at least three components, each of which is a homolog of a hydrocarbon compound, because it is inexpensive, easily available, and easy to adjust the phase change temperature. .
  • a mixture of C 14 paraffin, C 15 paraffin and a paraffin having 6 or more carbon atoms; a mixture of C 14 paraffin, C 16 paraffin and C 18 paraffin is preferable.
  • the oily substance in the form (2) is preferably a substance containing as a main component at least one hydrocarbon compound selected from the group consisting of 14, 15, 17 and 19 carbon atoms. More preferably, the main component is a hydrocarbon compound having 14 and / or 15 carbon atoms. Also, the hydrocarbon compound is preferably paraffin.
  • the “main component” means a component that constitutes 50% by mass or more when all components constituting the oily substance are 100% by mass, and the main component is composed of one component. And may be composed of two or more components. If the main component is composed of two or more components, It suffices that the total of each component constituting the component is 50% by mass or more.
  • the amount of the above-mentioned oily substance to be used may be appropriately set according to the type of the oily substance having heat storage due to the phase change, the use form of the heat storage, and the required heat storage efficiency. It is preferably at least 100% by mass, and more preferably less than 100% by mass. If it is less than 10% by mass, the heat storage efficiency / heat storage performance may be reduced. More preferably, the content is 20% by mass or more and 75% by mass or less.
  • the crystal nucleating agent may be any substance that can become a crystal nucleus when the heat storage material is solidified, but is preferably a substance having a crystal structure similar to an oily substance having heat storage property due to phase change, and Preferably, the substance has a higher melting point than oily substances and solidifies from an early stage. Further, it is more preferable that the substance has a phase change temperature higher by 10 to 10 ° C. than the melting point of the oily substance.
  • the melting point of the nucleating agent is lower than 10 ° C or higher than 10 ° C than the melting point of the oily substance, the function as the nucleating agent is reduced, and the melting temperature of solidification deviates (supercooling). Phenomenon) cannot be sufficiently prevented.
  • normal pentadecane When normal pentadecane is used as the oily substance having a heat storage property due to a phase change as the crystal nucleating agent, normal heptadecane, normal octadecane, normal nonadecane, nonoremaleicosane, nonoremaldocosan, normanoleto Saturated hydrocarbons such as lycosan, normal tetracosane and normal pentacosane, unsaturated hydrocarbons such as 1-octadecene, higher fatty acids such as stearic acid, higher alcohols such as octadecanol, sorbitan such as sonolebitan tristearate Fatty acid esters, polyoxyethylene sorbitan esters such as polyoxyethylene sorbitan tristearate, sucrose fatty acid esters such as sucrose stearic acid ester, glycerin fatty acid esters such as tristearin, and stearic acid amide
  • the amount of the crystal nucleating agent to be added is preferably 0.5% by mass or more and 100% by mass or less based on 100% by mass of the oily substance. 0. If the amount is less than 5% by mass, supercooling cannot be sufficiently prevented, and the mass is 20% by mass. If the heat storage capacity is exceeded, the content of the oily substance having heat storage properties in the heat storage body decreases, so that the heat storage efficiency cannot be sufficiently improved. More preferably, it is 1% by mass or more and 10% by mass or less.
  • the aqueous medium contains water as an essential component, but a mixture of water and a solvent that dissolves in water can be used.
  • water and methanol, ethanol, isopropyl alcohol, acetone , Acetonitrile, ethylene glycol, diethylene glycol and the like are preferable.
  • the proportion of water in the aqueous medium is preferably at least 50% by mass, more preferably at least 80% by mass. More preferably, only water is used.
  • the amount of the aqueous medium to be used is preferably 5.0% by mass or more, and 900% by mass or less based on 100% by mass of the oily substance having heat storage property due to phase change. Is preferred.
  • a nonionic surfactant As the dispersant in the present invention, it is preferable to use a nonionic surfactant as an essential component.
  • a nonionic surfactant a polyoxyalkyl ester compound; a sucrose fatty acid ester; a polyoxyethylene alkyl ether Nore; polyoxyethylene phenol phenol enolate; polyoxyethylene phenol alkyl ester; polyglycerin alkyl ester; fatty acid ester; fatty acid stone; alkylamine ethylene oxide adduct; sterolone such as cholesterol are preferable. It is. These may be used alone or in combination of two or more.
  • polyoxyethylene (additional number of moles of ethylene oxide: 20 or more) alkyl (total carbon number: 15 or more) ether is an essential component.
  • the number of moles of ethylene oxide to be added is 20 or more, preferably 100 or less, more preferably 50 or less.
  • the total carbon number is 15 or more, preferably 40 or less, more preferably 30 or less.
  • polyoxyethylene stearyl ether having an ethylene oxide addition mole number of 20 or more.
  • dispersant examples include amphoteric surfactants, anionic surfactants, and nonionic surfactants.
  • An ion-based surfactant and a cationic surfactant may be used as appropriate.
  • surfactants include alkyl sulfate salts such as sodium alkyl sulfonate; alkyl benzene sulfonic acids and salts thereof such as sodium alkyl benzene sulfonate; alkyl (phenyl) ether sulfate such as polyoxyethylene lauryl ether sodium sulfate; Salts; ⁇ -olefin sulfonates such as sodium tetradecene sulfonate; sulfosuccinates; ether sulfonates; ether carboxylic acids and salts thereof; betaines such as amidopropyl betaine laurate; dialkylammonium chloride A quaternary ammonium such as cadmium is preferred.
  • a polymer dispersant described below is preferably used in combination with the surfactant.
  • dispersants can be appropriately used as long as the amount of change in the volume average particle diameter of the above-mentioned dispersion does not deviate from the above-mentioned preferable range when mixed.
  • the dispersant comprises a surfactant
  • the surfactant has a hydrophilic-lipophilic balance index of less than 12 and a hydrophilic-lipophilic balance index of 12 or more. It is preferable that these are essential. More preferably, one having less than 9 and one having 12 or more is essential. More preferably, one having less than 3 and one having 12 or more is essential.
  • the synergistic effect of the combination of the low and high hydrophilic-lipophilic balance indicators prevents overcooling more effectively than using a single surfactant. However, it becomes easier to solidify and the heat storage efficiency is improved.
  • the above-mentioned index of the hydrophilic-lipophilic balance indicates the balance between the hydrophilic portion and the lipophilic portion of the surfactant, and is usually referred to as HLB (hydrophilipe-lipipophilebabalance).
  • HLB hydrophilipe-lipipophilebabalance
  • HLB of a surfactant whose molecular structure is clear can be determined by the following formulas: Griffin and Davies. Even for a surfactant whose molecular structure is not clear, HLB can be experimentally determined by performing an emulsification experiment using an oily substance and a surfactant whose HLB is known.
  • the surfactant in the present invention has at least one kind of hydrophilic-lipophilic balance index.
  • Each of the surfactants constituting the surfactant in the present invention contains less than 12 surfactants and at least one kind of surfactant having a hydrophilic lipophilic balance index of 12 or more.
  • the index of the hydrophilic-lipophilic balance of the entire surfactant obtained from the mass fraction of the surfactant is preferably 5 or more and 15 or less. If it is less than 5, the stability of the emulsion may be reduced. If it exceeds 15, supercooling may not be prevented. More preferably, it is 5 or more, and 12 or less, and still more preferably 11 or less.
  • the index of the hydrophilic-lipophilic balance of the entire surfactant is obtained from the sum of the values obtained by multiplying the mass fraction of each surfactant constituting the surfactant by the index of the hydrophilic-lipophilic balance. Will be.
  • X i is the mass fraction of surfactant i having an index of hydrophilic lipophilic balance of less than 12, assuming that the mass of the entire surfactant is 1, and Y j is the surfactant.
  • the index of hydrophilic-lipophilic balance is the mass fraction of surfactant j with an average of 12 or more, where the mass of the entire agent is 1, and HX i is the surface activity with an index of hydrophilic-lipophilic balance of less than 12.
  • HY j is an index of the hydrophilic-lipophilic balance of surfactant j, which has an index of hydrophilic-lipophilic balance of 12 or more.
  • nonionic surfactant As the surfactant used in the heat storage of the present invention, as described above, it is preferable to use a nonionic surfactant, and among the above-described nonionic surfactants, those having an HLB of less than 12 are preferred. Preferred are sorbitan alkyl esters and sucrose or sucrose fatty acid esters. In addition, as for 12 or more, polyoxy
  • polyoxyethylene additional mole number of ethylene oxide 20 or more
  • sorbitan alkyl total carbon number 15 or more
  • Ester and / or polyoxyethylene additional mole number of ethylene oxide 20 or more alkyl (total Ethers are more preferred.
  • the amount of the surfactant used is appropriately set so that the above-mentioned variation in the volume average particle diameter can be set in a preferable range. %, Preferably at least 0.1% by mass, and more preferably at most 30% by mass. More preferably, 1.0 mass. / 0 or more and 20% by mass or less.
  • the amount of the surfactant having the hydrophilic-lipophilic balance index of less than 12 is 100 mass of the surfactant. / 0 , preferably at least 5.0% by mass, and more preferably at most 95% by mass. More preferably, 10 mass. And 50 mass% or less.
  • the amount of the surfactant having an index of hydrophilic lipophilic balance of 12 or more is 5.0 mass with respect to 100 mass% of the surfactant. / 0 or more, and preferably 95% by mass or less. More preferably, the content is 50% by mass or more and 90% by mass or less.
  • the heat storage element of the present invention preferably includes a dispersion obtained by dispersing an oily substance having heat storage property by a phase change in an aqueous medium by essentially using a polymer dispersant together with a surfactant.
  • a surfactant and a polymer monodispersant together as a dispersant the stability of the emulsion can be sufficiently improved by a synergistic effect of these.
  • one kind of each of these production raw materials constituting the heat storage body may be used, or two or more kinds thereof may be used in combination.
  • the polymer dispersant in the present invention is not particularly limited as long as it is a polymer substance that is easily wetted by water or easily dissolved in water.
  • the nonionic polymer dispersant preferably has a weight average molecular weight of 5,000 to 300,000, more preferably 50,000 to 200,000, and has such a weight average molecular weight.
  • the nonionic polymer dispersant polyvinyl alcohol, polyvinyl pyrrolidone, hydroxypropyl methinoresenolerose and the like are preferable.
  • the ionic polymer dispersant preferably has a weight average molecular weight of 5,000 to 300,000, more preferably 50,000 to 300,000, and still more preferably 100,000 to 200,000.
  • sodium polyacrylate or the like is preferable.
  • the amount of the polymer dispersant used is preferably 0.01% by mass or more, and 5% by mass or less, based on 100% by mass of the oily substance having heat storage property due to phase change. Is preferred. More preferably, it is 0.01% by mass or more, and 3% by mass or less.
  • the nonionic surfactant when used as an essential component as a dispersant, the nonionic surfactant may be used alone, but as described above, the nonionic surfactant and another dispersant are used. May be used together. Specific examples of the combination include nonionic surfactants and anionic surfactants, nonionic surfactants and ionic surfactants, nonionic surfactants and nonionic-anionic surfactants.
  • Nonionic surfactants cationic surfactants and poly A combination of a dispersant and the like can be mentioned.
  • the heat storage body of the present invention may further contain an additive having the functions described below. These may be used alone or in combination of two or more.
  • Metal powders such as iron and copper: metal fibers; metal oxides; carbon;
  • the flame retardancy includes reduction of flammability, prevention of fire spread, extinction of flash point by steam, reduction of combustion calorie, etc.
  • antioxidants such as phenol, thio, and phosphorus.
  • the amount of the additive used is, for example, when calcium carbonate is used in order to reduce the flammability, the additive is used in an amount of 10 to the oil-based substance having a heat storage property due to a phase change.
  • It is preferably set to ⁇ ⁇ ⁇ 40% by mass.
  • An inclusion compound for adjusting the latent heat property may be added to the oily substance.
  • Examples of the clathrate compound C 4 H 8 ⁇ O ⁇ 1 7H 2 0, (CH 3) 3 ⁇ 1 0. 25 H 2 0, (C 4 H 9) 4 NCH_ ⁇ 2 ⁇ 32 H 2 0, ( C 4 H 9 ) 4 NCH 3 C0 2
  • H 2 0 is preferred. These may be used alone or in combination of two or more.
  • the heat storage material of the present invention include a method in which an oily substance having heat storage property by phase change is added to an aqueous solution in which a dispersant is dissolved in an aqueous medium, and emulsification is performed by stirring or the like. It is preferable to add an aqueous substance dissolved in a medium to an aqueous solution in which a surfactant is dissolved and add an oily substance having a heat storage property by a phase change, and emulsify the mixture by stirring or the like. Such a manufacturing method is one of preferred embodiments of the present invention.
  • the heat storage body of the present invention may also be obtained by dispersing a mixture including a crystal nucleating agent, an oily substance having a heat storage property by a phase change, an aqueous medium and a dispersant in an oil-in-water type. It is preferable that the obtained heat storage medium is manufactured by a method of changing the phase and then re-dispersed. Such a manufacturing method is also one of preferred embodiments of the present invention.
  • the method for manufacturing a heat storage element of the present invention is a method for manufacturing a heat storage element by dispersing a mixture essentially including an oily substance having an energy storage property by a phase change, an aqueous medium, and a dispersant in an oil-in-water type.
  • the method for manufacturing a heat storage body includes a step of dispersing an oily substance having heat storage properties by phase change by using a line mixer.
  • the heat storage body is obtained by dispersing a production raw material essentially including a crystal nucleating agent, an oily substance having heat storage properties by phase change, an aqueous medium, and a dispersant in an oil-in-water type.
  • the obtained heat storage material in a heat storage device or the like, the solidification / melting is repeated by phase change, and then the heat storage material is dispersed again.
  • the oil-based substance is sufficiently dispersed by stirring the heat-storage body in which the oil-based substance is already dispersed, by maintaining the dispersed state of the oil-based substance, or by re-dispersing the heat-storage body from which the oil-based substance is separated.
  • the manufacturing method of the present invention is applied to any of the above-mentioned, misaligned, or combined forms.
  • a form in which a dispersion of an oily substance is produced from production raw materials (2) a form in which the dispersion state of the dispersion of the oily substance is maintained, (3) a dispersion of the oily substance
  • a form in which the dispersed dispersion is redispersed may be applied to any of these forms or a form in which these are combined.
  • the above embodiment is carried out in the step of dispersing an oily substance having heat storage properties by phase change using a line mixer.
  • the step of dispersing the oily substance means not only the step of obtaining a dispersion of the oily substance by stirring the raw material using a line mixer, but also the heat storage element in which the oily substance is already dispersed.
  • the oily substance is maintained in a dispersed state by stirring the oily substance with a line mixer, and the oily substance is sufficiently dispersed by re-dispersing the heat storage material from which the oily substance is separated.
  • the heat storage body obtained by the production method of the present invention may be used as the heat storage body in which the oily substance is already in a sufficiently dispersed state or the heat storage body in which the oily substance is separated.
  • the obtained heat storage body may be used.
  • the heat storage body is usually stored in a tank.
  • the line mixer according to the present invention does not directly stir the raw materials in the tank, but rather by means of baffles, protrusions, and mechanical stirring installed in the piping through which the raw materials in the tank pass. It means a dispersing device that performs dispersion.
  • the line mixer there are a type having a stirring drive unit such as a motor capable of dispersing an oily substance having a heat storage property by a phase change in the mixer itself, and a type having no stirring drive unit in the mixer itself.
  • a stirring drive unit such as a motor capable of dispersing an oily substance having a heat storage property by a phase change in the mixer itself
  • a type having no stirring drive unit in the mixer itself When a mixer without a stirring drive unit is used, a circulating pump for feeding the raw materials for production and the like is required.
  • the line mixer of the type having the stirring drive section not only a mixer but also a pump having the ability as a pump is preferable. In this case, it is not necessary to install a pump in the pipe, which is preferable in terms of simplification of manufacturing equipment. However, if the capacity as a pump is insufficient, an additional pump may be installed.
  • line mixers include an in-line mixer with a high-speed rotating rotor, Model 450S (Silverson) and a TK Pipeline Homomixer, PL-2S (Sekisui Kika Kogyo). Is mentioned.
  • Such a line mixer for example, agitates and disperses the raw materials and the like by a strong suction force, a centrifugal force, and a shear force due to the high-speed rotation of the rotor.
  • a line mixer that stirs using a flow of a fluid generated by a pump or the like is preferable.
  • line mixers include static mixers such as OHR (Original Hydrodynic Acid Reaction) line mixer MX-8 (manufactured by Seika Industry), static mixers (manufactured by Noritake Company Limited), Dispersion (Fujikin Co., Ltd.), line mixer SMX type, SMV type (Coke Gridge Co., Ltd.) and the like.
  • Such a line mixer has, for example, an element ⁇ in which a rectangular plate is twisted by 180 °, and a mushroom-shaped collision body in the line mixer. Will be stirred and dispersed.
  • stirring is performed using a line mixer.
  • a pipe is connected to a tank into which the raw materials for production and the like are charged, and a line mixer is provided in the middle of the pipe.
  • the number and location of the line mixer may be appropriately set according to the production scale, the characteristics of the production raw material, the speed of the production raw material passing through the piping, the flow rate per unit time, and the like.
  • a line mixer is provided.
  • the mixture or dispersion in the tank may be supplied to the line mixer by piping, and the pipes for supplying the respective raw materials are connected to the line mixer. In this way, the raw material may be supplied.
  • the mixture or dispersion when the line mixer is installed in the middle of the pipe, the mixture or dispersion may be dispersed by passing the mixture or dispersion only once in the pipe in which the line mixer is installed, and may be passed two or more times. It may be dispersed by letting it. Further, the mixture or dispersion in the tank may be dispersed by circulating through a pipe provided with a line mixer.
  • the step of dispersing the oily substance can be performed simply and inexpensively.
  • the production mode in the present invention may be any mode in which stirring is performed using a line mixer.
  • a pipe is connected to a tank for charging the raw materials for production, and a line mixer is provided in the middle of the pipe. Is preferably installed.
  • the number of installations and the installation position may be appropriately set according to the production scale, the characteristics of the heat storage material, the speed of the heat storage material passing through the pipe, the flow rate per unit time, etc. It is preferable that a line mixer is installed in the vicinity.
  • the heat storage material or the like in the tank may be supplied to the line mixer through a pipe, or the heat storage material may be connected by connecting a plurality of pipes to the line mixer. Etc. may be supplied.
  • FIG. 1 shows an embodiment using a manufacturing apparatus 1 in the manufacturing method of the present invention. It is a schematic diagram.
  • the manufacturing apparatus 1 includes a tank 2 for supplying a raw material and a heat storage body, a line mixer 3 having a pumping function itself, and pipes 4 and 5 connected via the line mixer 3. And a discharge pipe 6 for extracting the dispersion.
  • the pipe 4 is connected to the bottom of the tank 2, and is connected to the line mixer 3.
  • the pipe 5 is connected to the line mixer 3 and to the tank 2.
  • a production raw material is charged into a tank 2 and sent to a line mixer 3 through a pipe 4 as a mixed liquid.
  • This mixed solution is dispersed by stirring in the line mixer 3 and returns to the tank 2 through the pipe 5 as a dispersion.
  • the dispersion returned to the tank 2 is stirred by convection in the tank 2 and is again sent to the line mixer 3 through the pipe 4.
  • the dispersion is produced by the time for circulating the dispersion, or by charging the heat storage material in which the oily substance is already dispersed into the tank 2, but also the dispersion is produced. Can be maintained. Further, even when the oily substance is separated, the dispersion can be redispersed and maintained.
  • FIG. 2 is a schematic diagram showing an embodiment using the manufacturing apparatus 11 in the manufacturing method of the present invention.
  • This manufacturing apparatus 11 includes a tank 12 for supplying a heat storage body, a line mixer 13 having a pumping capability itself, and pipes 14 and 15 connected via the line mixer 13. And the extracted dispersion pipe 16.
  • the pipe 14 is connected to the bottom of the tank 12 and is connected to the line mixer 13.
  • the pipe 15 is connected to the line mixer 13 and to the tank 12.
  • the heat storage medium in the tank 12 is phase-changed and then sent to the line mixer 13 through the pipe 14.
  • This heat storage material is dispersed by stirring in the line mixer 13 and returns to the tank 12 through the pipe 15 as a dispersion material.
  • the dispersion returned to the tank 12 is sent to the line mixer 13 again through the pipe 14.
  • the dispersion state of the dispersion can be maintained by charging the heat storage body in which the oily substance is already dispersed in the tank 12. Further, even when the oily substance is separated, the dispersion can be redispersed and maintained.
  • a dispersing means may be used, only a line mixer should be used as the dispersing means, since the step of dispersing the oily substance having heat storage property by the phase change in the aqueous medium is performed easily and equipment investment is suppressed. Is preferred. If other dispersing means are used, ordinary machines can be used. Examples include propeller stirrers, high-speed rotary stirrers, homomixers, high-pressure homogenizers, colloid dominoles, roll mills, roller mills, sand mills, ball mills, ultrasonic emulsifiers, vacuum kneaders, vacuum emulsifiers, open emulsifiers, etc. Can be
  • the heat accumulator was used to obtain a heat accumulator obtained by dispersing a mixture including a crystal nucleating agent, an oily substance having heat accumulating property by phase change, an aqueous medium and a dispersant in an oil-in-water type. After the phase change of the heat storage material in the same water tank or dispersion tank, the dispersion may be performed again. In addition, after extracting the heat storage material from the water tank or dispersion tank used to obtain the heat storage material dispersed in the oil-in-water type, put it into another water tank or dispersion tank used for the heat storage system, etc., and change the phase of the heat storage material.
  • the dispersion may be performed again. Further, after the heat storage medium dispersed in the oil-in-water type is changed in phase, the heat storage medium may be dispersed again in the same water tank or dispersion tank.After the heat storage medium is extracted from the water tank or dispersion tank, another water tank or dispersion tank may be used. It is also possible to re-disperse by putting it in
  • the present invention also provides a method of dispersing a mixture essentially including an oily substance having a heat storage property by a phase change, an aqueous medium, and a dispersant in an oil-in-water type, and then subjecting the heat storage body to a static type It is also a method for producing a heat storage material that is dispersed again using a mixer.
  • the heat storage material obtained by dispersing a mixture essentially comprising an oily substance having a heat storage property due to the above phase change, an aqueous medium and a dispersant in an oil-in-water type is obtained by the production method of the present invention.
  • a heat storage medium is used in a heat storage device or the like to change the phase, and then dispersed again using a static mixer.
  • the present invention also relates to a method for producing a heat storage element comprising a dispersion obtained by dispersing an oily substance having heat storage property by phase change in an aqueous medium in the presence of a dispersant, comprising the steps of:
  • the production method includes a step of adjusting the amount of the dispersant used based on the dispersant saturation concentration at the heat storage temperature of the aqueous dispersant solution obtained by mixing the aqueous medium and the dispersant.
  • the method is also a method for producing a heat storage body, wherein the concentration of the dispersant is 0.01 to 4 times the saturation concentration of the aqueous solution of the dispersant.
  • Such a manufacturing method is a preferable manufacturing method of the heat storage body of the present invention.
  • the method for converting an oily substance having heat storage property by phase change into a water dispersion includes, for example, an oily substance having heat storage property by phase change in an aqueous solution in which a dispersant is dissolved in water. And emulsifying the mixture by stirring or the like.
  • the step of adjusting the concentration of the dispersant under the heat storage temperature of the aqueous solution of the dispersant is performed by dissolving the dispersant in an aqueous medium such as water by specifying the amount of the dispersant used as described above. Will be performed.
  • the use form of the heat storage body of the present invention is preferably in the form of an aqueous dispersion in the form of an emulsion, or may be used as a heat storage body in a form filled in a packaging material.
  • a heat storage body will be used in a heat storage temperature range. It is preferable that such a heat storage body is stored and used in a heat storage tank constituting a heat storage device.
  • a method of using a heat storage body in which the dispersant concentration is set within the above range at the heat storage temperature of the aqueous solution of the dispersant in the heat storage temperature range is one of preferred embodiments of the present invention.
  • the heat storage temperature range is, for example, 0 to 20 ° C. when used for cooling, and 40 to 60 ° C. when used for heating, and may be set to a preferable temperature depending on use conditions.
  • the heat storage material of the present invention is used in various heat storage devices in the form of an emulsified product, a packaged state, or the like.
  • a heat storage device (1) the heat storage material is used as a heat transfer medium. Examples include a type that performs heat exchange, and (2) a type that includes a heat storage tank in which a heat storage body is stored and that can perform heat exchange of a heat medium.
  • a heat storage device using a water storage material dispersed in water is preferable, and the heat storage device circulates between the heat storage tank and the heat exchanger, or is provided outside the heat storage tank.
  • a heat storage device or the like that exchanges heat by circulating heat is used.
  • Such a heat storage device forms a heat storage system that is a heat transfer medium system for a district cooling / heating system or a building air conditioning system.
  • the heat storage device of (2) is provided with a heat storage tank in which the heat storage material is stored, and can perform heat exchange of the heat medium.
  • the heat storage device in which the heat storage material is stored is preferable.
  • a heat storage system is formed by such a heat storage device.
  • a heat storage device storing the heat storage body a heat storage device provided with heat exchange means so that heat energy can be transferred to and from a heat medium circulating outside the heat storage device is preferable.
  • a heat storage device or a heat storage system using such a heat storage body of the present invention is also one of the present invention.
  • a heat storage device in the form of an aqueous dispersion in the form of an emulsion is used, and a heat storage device or a heat storage system provided with a line mixer, A heat storage device or a heat storage system to which the manufacturing method of the present invention is applied.
  • a heat storage device or a heat storage system that can maintain the dispersed state of the heat storage body and can be suitably used for purposes such as energy saving and efficiency of cooling and heating energy and environmental protection. You can do it.
  • the dispersion of the oily substance in the heat storage tank collapses due to repeated phase change, it can be re-dispersed by using a line mixer attached to the heat storage device.
  • the present invention is also a heat storage system including a heat storage device using a heat storage material having an oily substance having a heat storage property by a phase change, an aqueous medium, and a dispersant, wherein the heat storage device is provided with a line mixer. It is also a thermal storage system.
  • the heat storage material used in the heat storage system is not particularly limited, but is preferably manufactured by the manufacturing method of the present invention. By adopting such a form, the same effect as the above-described heat storage system can be sufficiently exhibited.
  • the heat storage body of the present invention has high fluidity at the heat storage temperature, has stability and durability, and is easy to adjust the freezing point to improve the heat storage efficiency, or because the freezing temperature and the melting temperature are close to each other.
  • Heat storage device for the purpose of energy saving and efficiency of cooling and heating energy, and environmental protection. It is an excellent material for the heat storage system.
  • FIG. 1 is a schematic diagram showing an embodiment using a manufacturing apparatus 1 in the manufacturing method of the present invention.
  • FIG. 2 is a schematic diagram showing an embodiment using the manufacturing apparatus 11 in the manufacturing method of the present invention.
  • FIG. 3 is a schematic view showing a conventional mixing tank for producing a heat storage material. Explanation of reference numerals
  • paraffins and distilled from kerosene as an oily substance (tetradecane 1 9.4 mass 0/0, pentadecane 73.5 wt%, to hexadecane 6.9 wt%, heptadecanoic 0.2% by weight, component number 4, the dispersion 0 .44) 50.0 parts sucrose fatty acid ester (Daiichi Kogyo Seiyaku Co., Ltd.) Manufactured by Sugar Wax A-10E) 0.5 part was dissolved, the above aqueous solution was added, and emulsified using a stirrer (TK homomixer manufactured by Tokushu Kika Co., Ltd.).
  • TK homomixer manufactured by Tokushu Kika Co., Ltd.
  • aqueous dispersion in which paraffin was dispersed was obtained.
  • a heat storage body (aqueous dispersion) 1 according to the present invention was obtained.
  • the volume average particle diameter of the heat storage body 1 was measured using a particle size distribution meter.
  • the particle size distribution analyzer used was a laser diffraction particle size analyzer SALD-3000 manufactured by Shimadzu Corporation, and ion exchanged water was used as the measurement medium.
  • a regenerator was added to ion-exchanged water so as to be within the measurement region, the measurement concentration was adjusted, and the volume average particle diameter was measured.
  • the heat storage body 1 had a volume average particle size of 2.97 m.
  • the solidification temperature was obtained by performing differential scanning calorimetry (DSC) on the obtained heat storage body 1 under predetermined conditions.
  • DSC differential scanning calorimetry
  • a differential scanning calorimeter DSC-3100S manufactured by Mac Science was used.
  • the temperature was raised from 20 ° C to 25 at a rate of 2 ° CZ.
  • the solidification temperature (solidification start temperature) was 7.4 ° C.
  • the water dispersion which is a heat storage material
  • the saturated solution of the polyoxyethylene (20) stearyl ether used in Example 1 in water at 4 ° C in water is used.
  • the concentration was 27% by mass, and the aqueous solution of the surfactant prepared in Example 1 was at or below the saturation concentration. Therefore, the fluidity of the heat storage body 1 at 4 ° C was good.
  • the cloud point was 60 ° C or higher.
  • the heat storage body 2 had a volume average particle size of 3 ⁇ m.
  • the solidification temperature was determined by performing differential scanning calorimetry (DSC) on the obtained heat storage body 2 under predetermined conditions.
  • DSC differential scanning calorimetry
  • DSC-3100S of Mac Science was used.
  • the temperature was raised from 120 ° C to 25 ° C at a rate of 2 ° CZ.
  • the solidification temperature (solidification start temperature) was 7.6 ° C.
  • the concentration of the saturated solution of polyoxyethylene sorbitan alkyl ester used in Example 2 at 4 ° C. in water was 18% by mass, and the aqueous solution of the surfactant prepared in Example 2 was less than the saturated concentration. Therefore, the fluidity of the heat storage body 2 at 4 ° C was good.
  • the cloud point was 60 ° C or higher.
  • the heat storage body 2 was similarly evaluated by repeating solidification and melting 50 times, and it was found that the change in the volume average particle diameter was within 50%.
  • Example 3
  • Differential scanning calorimetry was performed on the obtained heat storage body 3 under predetermined conditions. To determine the coagulation temperature.
  • DSC differential scanning calorimetry
  • a differential scanning calorimeter DSC-3100S manufactured by Mac Science was used. As measurement conditions, after cooling from 25 ° C to ⁇ 20 ° C at a rate of 2 ° C, the temperature was raised from 120 ° C to 25 at a rate of 2 ° CZ. As a result, the solidification temperature (solidification start temperature) was 6.5 ° C. The fluidity of the heat storage body 3 at 5 ° C was good.
  • the volume average particle size of the heat storage body 3 was measured using a particle size distribution meter.
  • a particle size distribution analyzer a laser diffraction particle size distribution analyzer SALD-30000 manufactured by Shimadzu Corporation was used.
  • the heat storage body 1 had a volume average particle size of 2.94 ⁇ m.
  • the heat storage material 3 was solidified at 5 ° C and solidified at 12 ° C. The solidification was repeated 50 times and evaluated.The change in volume average particle diameter was within 50%. Met. Further, the solidification Z-melting was repeated 250 times, and the volume average particle diameter was measured to be 2.90 m. The change in the volume average particle size of the dispersion was as small as 11%, and the heat storage material was stable even after repeated coagulation and melting.
  • sucrose fatty acid ester manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd. sugar wax A- 1 0 E
  • aqueous dispersion in which paraffin was dispersed was obtained. Thereby, the heat storage body (aqueous dispersion) 4 according to the present invention was obtained.
  • the solidification temperature was obtained by performing differential scanning calorimetry (DSC) on the obtained heat storage body 4 under predetermined conditions. As a result, the solidification temperature (solidification start temperature) was 7.2 ° C. The fluidity of the heat storage body 2 at 5 ° C was good.
  • the volume average particle diameter of the heat storage body 4 was similarly measured using a particle size distribution meter. Thermal storage 4 Had a volume average particle size of 3.02 im.
  • the heat storage material 4 was solidified at 5 ° C and solidified at 12 ° C.
  • the solidification Z was repeated 50 times and the melting was evaluated 50 times.As a result, the change in the volume average particle diameter was within 50%. Was. Further, coagulation and melting were repeated 140 times, and the volume average particle diameter was measured to be 2.99 ⁇ .
  • the change in the volume average particle size of the dispersion was as small as 11%, and the heat storage material was stable even after repeated solidification and melting.
  • the solidification temperature was determined by performing differential scanning calorimetry (DSC) on the obtained heat storage body 5 under predetermined conditions. As a result, the solidification temperature (solidification start temperature) was 6.5 ° C. The fluidity of the heat storage body 5 at 5 ° C was good.
  • the volume average particle diameter of the heat storage body 5 was similarly measured using a particle size distribution meter.
  • the volume average particle diameter of the heat storage body 5 was 3.16 ⁇ .
  • the oily substance was coagulated at 5 ° C, and the coagulation was performed at 12 ° C. Z was repeated 50 times and the melting was evaluated. The change in volume average particle diameter was within 50%. Was. Further, the solidification Z-melting was repeated 140 times, and the volume average particle diameter was measured to be 3.36 ⁇ . The change in the volume average particle size of the dispersion was as small as + 6%, and the heat storage material was stable even after repeated coagulation / melting.
  • sucrose fatty acid esters to 0 parts (Dai-ichi Kogyo Seiyaku Co., Ltd. sugar wax A- 1 0 E) 0. 5 parts of the solvent
  • the opened liquid was added.
  • the mixture was emulsified using a stirrer (TK homomixer manufactured by Tokushu Kika Co., Ltd.).
  • An aqueous dispersion in which paraffin was dispersed was obtained.
  • the heat storage body (water dispersion) 6 according to the present invention was obtained.
  • the solidification temperature of the obtained heat storage body 6 was determined by performing differential scanning calorimetry (DSC) under predetermined conditions. As a result, the solidification temperature (solidification start temperature) was 6.9 ° C. The fluidity of the heat storage body 6 at 5 ° C was good.
  • the volume average particle diameter of the heat storage property 6 was similarly measured using a particle size distribution analyzer.
  • the heat storage body 6 had a volume average particle size of 2.64 zm.
  • the heat storage material 6 was solidified at 5 ° C and melted at 12 ° C, and was evaluated by repeating solidification and melting 50 times.As a result, the change in the volume average particle diameter was within 50%. . Further, the solidification and melting were repeated 20 times, and the volume average particle diameter was measured to be 2.70 ⁇ m. The change in volume average particle diameter of the dispersion was as small as + 2%, and the heat storage material was stable even after repeated solidification and melting.
  • the solidification temperature was determined for the obtained heat storage body 7 by performing differential scanning calorimetry (DSC) under predetermined conditions. As a result, the solidification temperature (solidification start temperature) was 6.9 ° C. The fluidity of the heat storage body 7 at 5 ° C was good.
  • the volume average particle diameter of the heat storage body 7 was similarly measured using a particle size distribution meter.
  • the volume average particle diameter of the heat storage body 7 was 2.6411.
  • the oily substance was coagulated at 5 ° C, and the coagulation / melting was repeated 50 times at 12 ° C.
  • the change in volume average particle diameter was within 50%.
  • the solidification and melting were repeated 20 times, and the volume average particle diameter was measured to be 2.71 ⁇ m.
  • the change in the volume average particle diameter of the dispersion was as small as + 3%, and the heat storage material was stable even after repeated solidification and melting.
  • the mixture was emulsified using a stirrer (TK homomixer manufactured by Tokushu Kika Co., Ltd.).
  • a paraffin-dispersed water dispersion was obtained.
  • a heat storage material (aqueous dispersion) 8 according to the present invention was obtained.
  • the solidification temperature of the obtained heat storage body 8 was determined by performing differential scanning calorimetry (DSC) under predetermined conditions. As a result, the solidification temperature (solidification start temperature) was 7.9 ° C.
  • the fluidity of the heat storage body 8 at 5 ° C was good.
  • the volume average particle diameter of the heat storage body 8 was similarly measured using a particle size distribution meter.
  • the volume average particle diameter of the heat storage body 8 was 3.09 ⁇ .
  • the heat storage material 8 was solidified at 5 ° C and melted at 12 ° C. The solidification was repeated 50 times and evaluated. The change in volume average particle diameter was within 50%. . Furthermore, the solidification and melting were repeated 100 times, and the heat storage body was stable even after the solidification and melting were repeated.
  • Example 9
  • Emulsification was carried out using a stirrer (TK homomixer manufactured by Tokushu Kika Co., Ltd.). An aqueous dispersion in which paraffin was dispersed was obtained. Thereby, the heat storage body (water dispersion body) 9 according to the present invention was obtained.
  • TK homomixer manufactured by Tokushu Kika Co., Ltd.
  • the volume average particle diameter of the heat storage body 9 was 2.9 ⁇ m.
  • the viscosity of the obtained heat storage material 9 was measured at 4 ° C. using a B8 L-type viscometer (manufactured by Tokimec Co.), and it was 1446 mPa ⁇ s, and the fluidity was good.
  • the heat storage material 9 was similarly evaluated by repeating solidification and melting 50 times, and it was found that the amount of change in the volume average particle diameter was within 50%.
  • the volume average particle diameter of the heat storage body 10 was 2.9 ⁇ m.
  • the viscosity of the obtained heat storage body 10 was measured at 4 ° C. using a B8 L-type viscometer, it was 96 mPa ⁇ s, and the fluidity was good.
  • the heat storage material 10 was coagulated at 4 ° C to solidify the oily substance, and melted at 12 ° C.Evaluation was performed by repeating 50 times of coagulation and melting.The change in volume average particle diameter was within 50%. Was. Furthermore, after repeating solidification Z-melting 70 times, the viscosity was measured at 4 ° C. and found to be 90 mPa ⁇ s, indicating good fluidity.
  • Example 9 The heat storage material 9 obtained in Example 9 was subjected to solidification of an oily substance at 4 ° C. in the presence of a copper plate, and was repeatedly subjected to solidification / melting at 12 ° C. When the solidification Z-melting was repeated 50 times, the change in the volume average particle diameter was within 50%. Next, the coagulation / melting was repeated 10 times, and the viscosity was measured at 4 ° C to find that it was 1190 mPa ⁇ s. The copper plate generated little ⁇ , and the water dispersion had almost no discoloration, and the fluidity was good.
  • Example 1 2 The heat storage material 9 obtained in Example 9 was subjected to solidification of an oily substance at 4 ° C. in the presence of a copper plate, and was repeatedly subjected to solidification / melting at 12 ° C. When the solidification Z-melting was repeated 50 times, the change in the volume average particle diameter was within 50%. Next, the coagulation / melting was repeated 10 times, and the visco
  • the mixture was emulsified using a stirrer (TK homomixer manufactured by Tokushu Kika Co., Ltd.) to obtain an aqueous dispersion in which paraffin was dispersed.
  • a heat storage body (aqueous dispersion) 12 according to the present invention was obtained.
  • the average particle diameter of the heat storage body 12 was 2.6 ⁇ .
  • Differential scanning calorimetry (DSC) was performed on the obtained heat storage body 12 under specified conditions. By doing so, the solidification temperature and the melting temperature were determined.
  • DSC differential scanning calorimetry
  • DSC-3100S manufactured by Mac Science was used. As measurement conditions, after cooling from 25 ° C to 120 ° C at a rate of 2 ° CZ, the temperature was raised from 120 ° C to 25 ° C at a rate of 2 ° CZ.
  • the solidification temperature (solidification start temperature) was 8.2 ° C
  • the melting temperature melting peak temperature
  • the oily substance was coagulated at 5 ° C, melted at 12 ° C, and then dispersed again.
  • the average particle diameter of the heat storage body 12 after the re-dispersion was 2.6 ⁇ .
  • Differential scanning calorimetry (DSC) was performed under specified conditions.
  • the solidification temperature (solidification onset temperature) was 8.2 ° C and the melting temperature (melting peak temperature) was 10.1 ° C. Was.
  • the heat storage body 12 was evaluated by repeating the solidification Z-melting 50 times in the same manner, and the change amount of the volume average particle diameter was within 50%.
  • a container 1.5 parts of polyoxyethylene stearyl ether (Nonion S-220, manufactured by Nippon Oil & Fats Co., Ltd.) was added as a nonionic surfactant to 48.0 parts of water, and dissolved in a water solution. Pentadecane, an oily substance, was dissolved in 50.0 parts. A solution prepared by dissolving 0.5 part of sorbitan tristearate (manufactured by Kao Corporation: Leodol SP-S30, melting point 54 ° C) as a nucleating agent was added to the part.
  • sorbitan tristearate manufactured by Kao Corporation: Leodol SP-S30, melting point 54 ° C
  • the mixture was emulsified using a stirrer (TK homomixer manufactured by Tokushu Kika) to obtain an aqueous dispersion in which paraffin was dispersed.
  • TK homomixer manufactured by Tokushu Kika
  • the average particle diameter of the heat storage body 13 was 2.6 ⁇ .
  • the obtained heat storage body 13 was subjected to differential scanning calorimetry (DSC) under predetermined conditions to obtain a solidification temperature and a melting temperature.
  • DSC differential scanning calorimetry
  • the solidification temperature solidification start temperature
  • the melting temperature melting peak temperature
  • a heat storage body (aqueous dispersion) 14 according to the present invention was obtained.
  • the average particle diameter of the heat storage body 14 was 3. ⁇ .
  • the obtained heat storage body 14 was subjected to differential scanning calorimetry (DSC) under predetermined conditions to obtain a solidification temperature and a melting temperature.
  • the solidification temperature solidification start temperature
  • the melting temperature melting peak temperature
  • the oily substance was coagulated at 5 ° C, melted at 12 ° C, and then dispersed again.
  • the average particle size of the regenerator 14 after redispersion was 2.6 ⁇ .
  • Differential scanning calorimetry (DSC) was performed under the specified conditions. there were.
  • the heat storage body 14 was similarly evaluated by repeating solidification and melting 50 times, and the change in volume average particle diameter was within 50%.
  • Example 15 Example 15
  • melting temperature (melting peak temperature) was 8.2 ° C.
  • the oily substance was coagulated at 5 ° C, melted at 12 ° C, and then dispersed again.
  • the average particle diameter of the regenerator 15 after redispersion was 2.9 m.
  • Differential scanning calorimetry (DSC) was performed under specified conditions.
  • the solidification temperature (solidification onset temperature) was 7.0 ° C, and the melting temperature (melting peak temperature) was 8.4 ° C. Was.
  • the heat storage body 15 was evaluated by repeating solidification and melting 50 times. The change in the volume average particle diameter was within 50%.
  • Circulation pump line mixer (type without stirring drive: OHR Fluid Engineering Laboratory design: OHR line mixer MX-8), and a mixing tank with piping and polyoxyethylene (20) stearyl as nonionic surfactant ether (NOF Corporation: nonionic S- 220) 1.
  • paraffin 5 parts were distilled from kerosene as an aqueous solution and an oily substance was added dissolved in water 48.0 parts (tetradecane 1 9.4 mass 0/0, pentadecane 73.5% by mass, hexadecane 6.9% by mass, heptadecane 0.2% by mass) 50.0 parts of sucrose fatty acid ester as a crystal nucleating agent (Daiichi Kogyo Yakuhin Co., Ltd .: Sugar wax A-10E) A solution in which 0.5 part was dissolved was added. The circulation pump was started and paraffin dispersion was started. After a predetermined time, the pump was stopped to obtain an aqueous dispersion in which paraffin was dispersed. Thus, a heat storage material (aqueous dispersion) 16 according to the present invention was obtained. The average particle diameter of the heat storage body 16 was 2.8 m.
  • the solidification temperature was determined by performing differential scanning calorimetry (DSC) on the obtained heat storage body 16 under predetermined conditions.
  • the solidification temperature (solidification onset temperature) was 7.7 ° C
  • the melting temperature (melting peak temperature) was 8.5 ° C.
  • the heat storage unit 16 is extracted from the mixing tank, and a circulation pump, a line mixer (type without stirring drive: OHR Fluid Engineering Laboratory Design: OHR Line Mixer MX-18), and a heat storage water tank with piping was put into.
  • the oily substance was coagulated at 5 ° C, and coagulated to melt at 12 ° C. Z was repeated five times, followed by re-dispersion.
  • the average particle size of the regenerator 16 after redispersion was 2.8 m.
  • Differential scanning calorimetry (DSC) under the specified conditions showed a solidification temperature (solidification onset temperature) of 7.9 ° C and a melting temperature (melting peak temperature) of 8.4 ° C. .
  • the heat storage body 16 was similarly evaluated by repeating solidification and melting 50 times, and the change in volume average particle diameter was within 50%.
  • the mixture was emulsified using a stirrer (TK homomixer manufactured by Tokushu Kika Co., Ltd.) to obtain an aqueous dispersion in which paraffin was dispersed.
  • a heat storage body (aqueous dispersion) 17 according to the present invention was obtained.
  • the average particle diameter of the heat storage body 17 was 2.8 m.
  • the differential scanning calorimetry (DSC) was performed under predetermined conditions to obtain the solidification temperature and the melting temperature.
  • the solidification temperature solidification start temperature
  • the melting temperature melting peak temperature
  • the regenerator 17 was taken out of the previous container, the oily substance was coagulated at 5 ° C in another container, melted at 12 ° C, and then dispersed again.
  • the average particle diameter of the regenerator 17 after redispersion was 2.7 ⁇ .
  • Differential scanning calorimetry (DSC) was performed under specified conditions.
  • the solidification temperature (solidification onset temperature) was 7.8 ° C and the melting temperature (melting peak temperature) was 8.4 ° C. Was.
  • the heat storage body 17 was similarly evaluated by repeating the coagulation / melting 50 times and found that the change in the volume average particle diameter was within 50%.
  • the mixture was emulsified using a stirrer (TK homomixer manufactured by Tokushu Kika Co., Ltd.) to obtain an aqueous dispersion in which paraffin was dispersed.
  • a heat storage body (aqueous dispersion) 18 according to the present invention was obtained.
  • the average particle size of the heat accumulator 18 was 2.7 ⁇ .
  • the obtained heat storage body 18 was subjected to differential scanning calorimetry (DSC) under predetermined conditions to obtain a solidification temperature and a melting temperature.
  • DSC differential scanning calorimetry
  • the heat storage body 18 was taken out of the previous container, the oily substance was coagulated at 5 ° C in another container, melted at 12 ° C, and then dispersed again.
  • the average particle size of the regenerator 18 after redispersion is 2.7 ⁇ .
  • Differential scanning calorimetry (DSC) was performed under specified conditions.
  • the solidification temperature (solidification onset temperature) was 7.7 ° C and the melting temperature (melting peak temperature) was 8.4 ° C. Was.
  • the heat storage material 18 was evaluated by repeating solidification and melting 50 times in the same manner. The change in the volume average particle diameter was within 50%.
  • Example 19
  • Example 20 An iron plate was immersed in the heat accumulator obtained in Example 9, and the solidification and melting were repeated 50 times. When the evaluation was performed, the amount of change in the volume average particle system was within 50%. Frozen The repeated evaluation of knot melting was further continued 500 times, but no separation of paraffin was observed. The iron content of the heat storage material after the evaluation was measured by ICP analysis (Induetively Coupled Plasma; model name: ULTI MA, manufactured by HORIBA, Ltd.) and found to be 176 ppm.
  • ICP analysis Induetively Coupled Plasma; model name: ULTI MA, manufactured by HORIBA, Ltd.
  • paraffin 5 parts were distilled from kerosene as an aqueous solution and an oil soluble substance added dissolved in water 48.0 parts (tetradecane 1 9.4 mass 0/0, pen Tadekan 73.
  • sucrose fatty acid ester (Sugar wax A-10E, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) was dissolved in 50.0 parts. The liquid was charged.
  • the circulation pump was started to start dispersing the phase change substance paraffin. After a predetermined time, the pump was stopped to obtain an aqueous dispersion in which paraffin was dispersed. As a result, a heat storage material (water dispersion) 20 according to the present invention was obtained.
  • the average particle diameter of the heat storage body 20 was 3 m.
  • the solidification temperature was obtained by performing differential scanning calorimetry (DSC) on the obtained heat storage body 20 under predetermined conditions.
  • the solidification temperature (solidification start temperature) was 7.3 ° C.
  • the heat storage body 20 was evaluated by repeating the coagulation / melting 50 times in the same manner. The change in the volume average particle diameter was within 50%. Comparative Example 1
  • Polyoxyalkylene (addition number of ethylene oxide: 8 to 13; addition number of propylene oxide: 3 to 8) Alkyl (alkyl chain: 12 to: 14) Ether (made by Kao Corporation: Emulgen MS 11) 0) 1. hexadecane 5 parts of water 48. added to 0 parts dissolved aqueous solution and distilled paraffin from kerosene as an oily substance (Te Toradekan 19.4 mass 0/0, pentadecane 73.5 mass 0/0, to 6 . 9 Wt%, heptadecanoic 0.2 wt%) 50.
  • Sucrose fatty acid esters to 0 parts (first Kogyo Seiyaku: Sugar Wax A_ l 0 E) solution prepared by dissolving 0.5 parts were charged and c stirrer (Tokushukika The emulsion was emulsified by using a TK homomixer (Kakosha).
  • the obtained comparative heat storage body 1 was subjected to differential scanning calorimetry (DSC) under predetermined conditions to obtain a solidification temperature.
  • DSC differential scanning calorimetry
  • a differential scanning calorimeter DSSC-3100S manufactured by Mac Science was used.
  • the temperature was raised from 120 ° C to 25 ° C at a rate of 2 ° CZ.
  • the solidification temperature solidification start temperature
  • Comparative Example 2 The surfactant used in Comparative Example 1 was arbitrarily soluble in water. Comparative Example 2
  • the obtained comparative heat storage body 2 was subjected to differential scanning calorimetry (DSC) under predetermined conditions to obtain a solidification temperature.
  • the solidification temperature solidification start temperature
  • the concentration of the saturated solution of polyoxyethylene (13) stearyl ether used in Comparative Example 2 in water was 0.08% by mass, and the aqueous solution of the surfactant prepared in Comparative Example 2 was Since the concentration was higher than the saturation concentration, the fluidity of the comparative heat storage material 2 at 4 ° C was poor, and was not suitable for use as a heat storage material.
  • Comparative Example 3 Comparative Example 3
  • polyvinylpyrrolidone Nippon Shokubai Co., Ltd .; molecular weight: about 120,000
  • a polymer dispersant 1.5 parts of water was added to 48.0 parts of water, and a dissolved aqueous solution and paraffin distilled from kerosene, which is an oily substance, were used.
  • sucrose fatty acid ester (Daiichi Kogyo Seiyaku Co., Ltd .: Sugar) Wax A—10E)
  • TK homomixer manufactured by Tokushu Kika Co., Ltd.
  • the heat storage body (aqueous dispersion) 20 obtained in Example 20 was charged into a circulating pump and a water tank provided with piping. After cooling the regenerator in the water tank, heat was released to change the phase of paraffin dispersed in the regenerator. After the phase change, a part of paraffin was also seen to be separated above the heat storage body in the water tank. The heat storage material in this water tank was re-dispersed using only the circulation pump, but separated paraffin was present above the heat storage material in the water tank.
  • the heat storage body of the present invention has the above-described configuration, and the volume average particle diameter change of the dispersion of the oily substance when the solidification / melting is repeated by the phase change is within a specific range. Therefore, it can be suitably used for the purpose of energy saving and efficiency of cooling and heating energy, environmental protection, etc., and by adjusting the dispersant concentration in the dispersant aqueous solution according to the purpose of use, the heat storage It is easy to use and has improved durability. In addition, the improved fluidity during heat storage improves system operation. Because it can be easily manufactured, it is an excellent heat storage device for cooling and heating energy for large buildings such as office buildings and factories, home use, etc. Things.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Central Heating Systems (AREA)

Abstract

L'invention concerne un milieu de stockage de la chaleur présentant une fluidité élevée à une température de stockage de la chaleur, une efficacité de transfert de chaleur améliorée et une excellente stabilité en tant que dispersion, ainsi qu'un procédé de production dudit milieu de stockage de chaleur. Une unité de stockage de la chaleur ou un système de stockage de la chaleur peuvent, de plus, être utilisés de façon avantageuse afin d'obtenir une réduction de coût et une plus grande efficacité quant à l'énergie de climatisation, afin de protéger l'environnement, etc. Le milieu de stockage de la chaleur est une dispersion de type huile dans l'eau d'un mélange comprenant comme ingrédients indispensables une substance huileuse pouvant stocker la chaleur par changement de phase, un milieu aqueux et un dispersant, se caractérisant en ce qu'après la répétition de la solidification/fusion par changement de phase de la dispersion à substance huileuse 50 fois, la dispersion présente un changement de diamètre particulaire volumique moyen de ?50 % ou moins par rapport au diamètre particulaire volumique moyen avant la répétition de la solidification/fusion.
PCT/JP2003/005143 2002-04-26 2003-04-23 Milieu de stockage de la chaleur, procede de production d'un milieu de stockage de la chaleur et systeme de stockage de la chaleur comprenant un milieu de stockage de la chaleur. WO2003091356A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003231447A AU2003231447A1 (en) 2002-04-26 2003-04-23 Heat storage medium, process for producing heat storage medium and heat storage system including heat storage medium

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2002-126418 2002-04-26
JP2002126418 2002-04-26
JP2002325874A JP2004161794A (ja) 2002-11-08 2002-11-08 蓄熱体並びに蓄熱体の製造方法及び蓄熱体を用いた蓄熱システム
JP2002-325874 2002-11-08

Publications (1)

Publication Number Publication Date
WO2003091356A1 true WO2003091356A1 (fr) 2003-11-06

Family

ID=29272369

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/005143 WO2003091356A1 (fr) 2002-04-26 2003-04-23 Milieu de stockage de la chaleur, procede de production d'un milieu de stockage de la chaleur et systeme de stockage de la chaleur comprenant un milieu de stockage de la chaleur.

Country Status (2)

Country Link
AU (1) AU2003231447A1 (fr)
WO (1) WO2003091356A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5740582A (en) * 1980-08-21 1982-03-06 Matsushita Electric Ind Co Ltd Regenerating material
JPH02207836A (ja) * 1989-02-06 1990-08-17 Technol Res Assoc Super Heat Pump Energ Accum Syst 蓄熱媒体充填方法および装置
JPH06313688A (ja) * 1993-04-27 1994-11-08 Matsushita Electric Works Ltd 蓄熱システム
JPH07126614A (ja) * 1993-11-05 1995-05-16 Sekisui Plastics Co Ltd 潜熱型蓄熱材料
JP2000129251A (ja) * 1998-10-27 2000-05-09 Mitsubishi Chemicals Corp 蓄熱材組成物及びそれを用いた蓄熱装置
JP2000336350A (ja) * 1999-06-01 2000-12-05 Mitsubishi Cable Ind Ltd 蓄熱材
JP2001089755A (ja) * 1999-09-21 2001-04-03 Nippon Shokubai Co Ltd 蓄冷材、及び該蓄冷材を含んでなる冷却媒

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5740582A (en) * 1980-08-21 1982-03-06 Matsushita Electric Ind Co Ltd Regenerating material
JPH02207836A (ja) * 1989-02-06 1990-08-17 Technol Res Assoc Super Heat Pump Energ Accum Syst 蓄熱媒体充填方法および装置
JPH06313688A (ja) * 1993-04-27 1994-11-08 Matsushita Electric Works Ltd 蓄熱システム
JPH07126614A (ja) * 1993-11-05 1995-05-16 Sekisui Plastics Co Ltd 潜熱型蓄熱材料
JP2000129251A (ja) * 1998-10-27 2000-05-09 Mitsubishi Chemicals Corp 蓄熱材組成物及びそれを用いた蓄熱装置
JP2000336350A (ja) * 1999-06-01 2000-12-05 Mitsubishi Cable Ind Ltd 蓄熱材
JP2001089755A (ja) * 1999-09-21 2001-04-03 Nippon Shokubai Co Ltd 蓄冷材、及び該蓄冷材を含んでなる冷却媒

Also Published As

Publication number Publication date
AU2003231447A1 (en) 2003-11-10

Similar Documents

Publication Publication Date Title
US6447692B1 (en) Nanometer sized phase change materials for enhanced heat transfer fluid performance
Cabaleiro et al. Review on phase change material emulsions for advanced thermal management: Design, characterization and thermal performance
JP7446225B2 (ja) 熱交換流体／冷却材の相変化材料
JPH05237368A (ja) 蓄熱材用マイクロカプセル
US9972412B2 (en) Cellulose capsules
CN102000536A (zh) 高囊芯含量聚脲复合囊壁胶囊及其制造方法
CN101480596A (zh) 一种相变储能纳米胶囊粉体的制备方法及其应用
WO2003091356A1 (fr) Milieu de stockage de la chaleur, procede de production d'un milieu de stockage de la chaleur et systeme de stockage de la chaleur comprenant un milieu de stockage de la chaleur.
JP5604834B2 (ja) 吸・放熱カプセル及び吸・放熱カプセル分散液
JP2007031597A (ja) 吸・放熱カプセル及びその製造方法並びに吸・放熱カプセル分散液及びその製造方法
JP2004300424A (ja) 蓄熱材、その製造方法、加温あるいは冷却システムおよび蓄熱性物品、および共重合体
JPH07126614A (ja) 潜熱型蓄熱材料
JPH1121577A (ja) 金型潤滑剤
JP2005298534A (ja) 蓄熱体及び蓄熱体を用いた蓄熱システム
JP2004211056A (ja) 蓄熱体及び蓄熱体を用いた蓄熱システム
JP6176780B2 (ja) 熱エネルギー貯蔵材料および熱エネルギー貯蔵材料の製造方法
JP2004143229A (ja) 潜熱蓄熱剤組成物
AU4162696A (en) Thermal energy storage composition
Liu et al. Microencapsulation of biobased phase change material by interfacial polycondensation for thermal energy storage applications
JP2004189843A (ja) 蓄熱用マイクロカプセル及び蓄熱材
JPH0931451A (ja) 蓄熱材及び蓄熱材分散液
JP2007330872A (ja) 水溶性相変化物質のマイクロカプセル化方法及び装置
JP2004161794A (ja) 蓄熱体並びに蓄熱体の製造方法及び蓄熱体を用いた蓄熱システム
JP2004210859A (ja) 蓄熱体の製造方法
JP2005146153A (ja) 蓄熱材用エマルションの製造方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase