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WO2015083169A1 - Dispositif d'accumulation d'énergie thermique - Google Patents

Dispositif d'accumulation d'énergie thermique Download PDF

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Publication number
WO2015083169A1
WO2015083169A1 PCT/IL2014/051060 IL2014051060W WO2015083169A1 WO 2015083169 A1 WO2015083169 A1 WO 2015083169A1 IL 2014051060 W IL2014051060 W IL 2014051060W WO 2015083169 A1 WO2015083169 A1 WO 2015083169A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
pipe
separating surface
cover
pcm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IL2014/051060
Other languages
English (en)
Inventor
Gennady ZISKIND
Yoram KOZAK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US15/100,373 priority Critical patent/US20160298910A1/en
Publication of WO2015083169A1 publication Critical patent/WO2015083169A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
    • 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
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
    • 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 invention relates to a thermal energy storing device that comprises phase- change materials.
  • PCMs Phase-change materials
  • the absorption of heat can be used for thermal energy storage, and in the case of PCMs a relatively large amount of thermal energy can be absorbed in relation to the mass and volume of the PCMs.
  • a device that comprises a PCM can be used as a "thermal battery", since heat can be discharged when the use of thermal energy is required.
  • a common way for charging a PCM battery is by exposing it to heat that originates from sun radiation, thus storing the solar energy.
  • PCMs with high latent heat usually have low thermal conductivity.
  • a possible solution for increasing the thermal conductivity in devices that contain PCMs is the use of separating surfaces (fins) with high thermal conductivity between PCM layers, which provides a better conductivity within the device.
  • Such surfaces create a separation between layers of PCMs and each volume between two surfaces acts as a separate cell of a PCM battery.
  • Most surfaces, according to the prior art, are circular or longitudinal, but in each case the surfaces prevent a continuity of the PCM along the device.
  • PCM-comprising devices Another disadvantage of PCM-comprising devices is that the volume of PCMs changes according to the amount of absorbed or discharged heat.
  • the heated material expands.
  • the expansion of materials inside a device can cause stress on different components of the device that are in contact with the expanding material, and as a result can sometimes cause mechanical failure.
  • PCMs undergo solidification and as a result the volume of the material decreases, creating air voids that redefine the shape of the material inside the device, which can result in an uneven solidification and reduced heat transfer area.
  • each cell When using separate cells of PCM batteries, as suggested in the prior art, each cell must be provided with a void in which the material can expand during melting. In addition, any adjustment, such as replacing the material inside the device, has to be performed on each cell separately, which obviously complicates the use of the device and increases operation costs.
  • the invention relates to a heat-storage battery device, comprising a cover, closing components, and an inner separating surface that along with the cover, defines an inner volume that provides a continuous pathway for materials inside the inner volume of the device.
  • materials are usually PCMs that are suitable for heat storage.
  • the separation surface can be shaped as a helix or as any other surface suitable to permit close-contact melting (CCM), while (1) providing a continuous inner pathway for materials that are positioned inside the device, and (2) having a large surface area comparable to that of circular or longitudinal fins.
  • close-contact melting is achieved using an inner separating surface, which is a helical surface coiled around an inner core, such as a pipe, which surface has an inclination that is as small as possible that the mechanical configuration permits.
  • a quasi-horizontal surface, when possible, provides the best results for CCM.
  • the invention can further comprise a pipe that is located within the device, for example, the separating surface can be provided around the pipe.
  • the inner volume of the pipe is suitable to allow a fluid (liquid or gas, including steam) to flow therein.
  • the closing components are adapted to seal the inner volume of the device from the environment, and the cover and the separating surface are in contact to prevent any leak of material from the sides of the surface.
  • Fig. 1 is a perspective view of a separating surface and a pipe, according to one embodiment of the invention.
  • Fig. 2A is a front view of the separating surface of Fig. 1, showing a vertical cross-sectional axis A- A; 3.
  • Fig. 2B is a view of the section of Fig. 2 A taken along the AA plane;
  • Fig. 3 is an exploded view of the separating surface of Fig. 1 and the other components of the device, according to one embodiment of the invention.
  • Fig. 4 is a front view of the assembled device of Fig. 3.
  • phase-change materials in which the density of the material changes when absorbing or discharging heat.
  • An exemplary PCM used for heat storage is NaN03 because of its high volumetric heat capacity, which indicates a high ability for heat storage.
  • the change of the volume of the materials when absorbing heat (expanding) or when discharging heat (shrinking) requires a suitable void within the device that hosts the material that can accommodate the material in all phases.
  • Fig. 1 is a perspective view of separating surface 101 and pipe 102, according to one embodiment of the invention.
  • Separating surface 101 which can also be referred to as a "fin”
  • Pipe 102 is suitable to allow a flow of materials through its inner volume, such as heated water, and it can be used for heat transfer between the PCM and the material that flows through pipe 102.
  • Pipe 102 can be connected to other components or to a water source, for example.
  • separating surface 101 provides a one-cell battery device wherein all of the material that is located within the device is in contact with the continuous surface, thus significantly improving heat transfer to the PCM.
  • the shape of surface 101 provides an increased heat transfer area, which also increases the rate of heat transfer, which in turn results in faster charging (when the material is heated) and discharging (when the material releases heat during solidification). It is also possible to use convection to increase the heat transfer rate.
  • the continuous volume within the device allows the PCM to easily expand and shrink during different thermal processes. According to this embodiment there is a need for only one void for future expansion since there is only one "cell" that contains the PCM. During melting, all of the material concentrates at the bottom, due to gravity, so there is no separation of the material.
  • Fig. 2A is a front view of separating surface 101 and pipe 102 of Fig. 1, showing a vertical cross-sectional axis A-A
  • Fig. 2B is a view of the section of Fig. 2A, taken along the AA plane, both showing the pathway through which materials can flow.
  • Surface 101 is not provided along the whole length of pipe 102 in order to leave a void for the material that is located within the device for when it expands, and because pipe 102 can be connected at its edges to other components, such as sealing component, as will be shown in Figs. 3 and 4.
  • the device comprises other components, as shown in Fig. 3 in an exploded view, such as cover 301.
  • Cover 301 can be made of any material that is suitable to be in contact with the specific PCM that is used in a specific device, and insulated from outside. Moreover, as shown in Fig. 4, the outer edge of surface 101 and cover 301 may be in contact, thus causing the material to flow along the continuous formed pathway while utilizing the largest possible heat transfer area.
  • Fig. 3 also shows sealing components (flanges) 302a, 302b, 303a, and 303b.
  • Components 302a and 302b are suitable to be connected to cover 301 by a screw mechanism, and components 303a and 303b are suitable to connect to component 302a and 302b by screws that can be positioned inside holes such as hole 304.
  • Pipe 102 is also suitable to be connected or to be in contact with sealing components 302a, 302b, 303a, and 303b, which can be replaced with any other closing (and not necessarily sealing) components that have the ability to connect to the other components of the device and separate the inner volume of the device from the environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un dispositif de batterie à accumulation thermique, comprenant un couvercle, des composants de fermeture et une surface de séparation intérieure qui définit avec le couvercle un volume intérieur. Le volume intérieur permet le passage continu de matériaux dans ce dernier, et d'améliorer simultanément la fusion.
PCT/IL2014/051060 2013-12-05 2014-12-04 Dispositif d'accumulation d'énergie thermique Ceased WO2015083169A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/100,373 US20160298910A1 (en) 2013-12-05 2014-12-04 Thermal energy storage device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361912035P 2013-12-05 2013-12-05
US61/912,035 2013-12-05

Publications (1)

Publication Number Publication Date
WO2015083169A1 true WO2015083169A1 (fr) 2015-06-11

Family

ID=53272987

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2014/051060 Ceased WO2015083169A1 (fr) 2013-12-05 2014-12-04 Dispositif d'accumulation d'énergie thermique

Country Status (2)

Country Link
US (1) US20160298910A1 (fr)
WO (1) WO2015083169A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3032028B1 (fr) * 2015-01-26 2019-05-17 Valeo Systemes Thermiques Batterie thermique a materiau a changement de phase encapsule.
USD1025325S1 (en) * 2022-04-06 2024-04-30 Arkema Inc. Heat transfer element for heat exchanger tube

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299274A (en) * 1979-05-01 1981-11-10 Pipe Systems, Incorporated Thermal energy storage device and method for making the same
US6624349B1 (en) * 2000-11-08 2003-09-23 Hi-Z Technology, Inc. Heat of fusion phase change generator
CN201945225U (zh) * 2010-12-20 2011-08-24 许益凡 螺旋螺纹弹性管束相变蓄热器
US20120055661A1 (en) * 2010-09-03 2012-03-08 Peter Feher High temperature thermal energy storage system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299274A (en) * 1979-05-01 1981-11-10 Pipe Systems, Incorporated Thermal energy storage device and method for making the same
US6624349B1 (en) * 2000-11-08 2003-09-23 Hi-Z Technology, Inc. Heat of fusion phase change generator
US20120055661A1 (en) * 2010-09-03 2012-03-08 Peter Feher High temperature thermal energy storage system
CN201945225U (zh) * 2010-12-20 2011-08-24 许益凡 螺旋螺纹弹性管束相变蓄热器

Also Published As

Publication number Publication date
US20160298910A1 (en) 2016-10-13

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