WO2010147457A2 - Container filled with heat accumulating phase change material - Google Patents

Container filled with heat accumulating phase change material Download PDF

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Publication number
WO2010147457A2
WO2010147457A2 PCT/NL2010/000094 NL2010000094W WO2010147457A2 WO 2010147457 A2 WO2010147457 A2 WO 2010147457A2 NL 2010000094 W NL2010000094 W NL 2010000094W WO 2010147457 A2 WO2010147457 A2 WO 2010147457A2
Authority
WO
WIPO (PCT)
Prior art keywords
phase change
change material
container
heat accumulating
distance
Prior art date
Application number
PCT/NL2010/000094
Other languages
French (fr)
Other versions
WO2010147457A3 (en
Inventor
Herman Reezigt
Hendrik Glastra
Gradus Hendrikus Maria Oortman
Bart Winters
Original Assignee
Capzo International B.V.
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 Capzo International B.V. filed Critical Capzo International B.V.
Publication of WO2010147457A2 publication Critical patent/WO2010147457A2/en
Publication of WO2010147457A3 publication Critical patent/WO2010147457A3/en

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
    • 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
    • F28D2020/0004—Particular heat storage apparatus
    • F28D2020/0008—Particular heat storage apparatus the heat storage material being enclosed in plate-like or laminated elements, e.g. in plates having internal compartments
    • 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

Abstract

The invention provides a solution for the well known problem that the known containers filled with heat accumulating material transfer this heat only with delay. To obviate this drawback the invention proposes a container filled with heat accumulating material with a generally flat configuration, delimited by two distant main surfaces, the mean value (d) of this distance being smaller than 20 mm, while the phase change material is present in powder or granular form. In this way the distance between the material present in the centre of the container and the outer surface of the container remains limited.

Description

Title: Container filled with heat accumulating phase change material
The invention relates to a container filled with a heat accumulating phase change material.
Such containers are known from practice. The heat accumulating material used therein is commonly a phase change material, more particularly a salt hydrate of which the phase change temperature can lie between 200C and 120°C. The containers as used in practice commonly have a spherical configuration which is indeed the most obvious one.
Of course' it has been contemplated, knowing the possible uses of this material and a container filled therewith, to use same in water heaters, indirectly heated by solar collectors.
It was thought that in this way the heat accumulating capacity thereof could be significantly improved. However tests have shown that the obtained improvements were not as great as might be expected on the basis of the properties of the used materials .
It came to applicant, and it was also ascertained by applicant, that this is a result of the fact that the time necessary for the transfer of heat from the innermost part of such a spherical container filled with heat accumulating material to the outer circumference thereof, increases, starting from an initial value thereof, significantly with the increase of the distance to- this outer circumference, and this more than proportional. The result is that the amount of heat, accumulated in such a container, can eventually be extracted therefrom but only after the lapse of a very long time.
In other applications, too, this effect is troublesome.
To obviate this effect the invention proposes that a container as defined hereinbefore has a generally flat configuration and is bounded by two main surfaces at a distance form each other, of which distance the mean value (d) is smaller than 20 mm, while the phase change material is provided in this container in powder- or granular form. By limiting the distance between the main surfaces it is ensured that there is only a certain minimum mean distance between the material which is present in the centre of the container and the main surfaces so that a fast heat transfer, also from this centre, is possible, while the fact that the phase change material is present in this container in powder or granular form makes it possible to fill these containers on an industrial scale, for instance using the same machines as used with the common "pads", which are mostly filled with a nutrient or a stimulant. A suitable heat accumulating material in powder or granular form is "Thermusol" . Extensive documentation thereof can be found on the following web sites on the Internet: www.thermusol.nl / www.capzo.nl / www.salcabv.nl.
Preferably the mean distance (d) mentioned hereinbefore, is smaller than 10 mm.
The configuration of the main surface can be a circle shape or a polygonal shape.
A preferred embodiment is such that a first main surface continues, via an upstanding edge part, in a circumferential edge which is sealingly connected to the circumferential edge of the second main surface. This is thus, in fact, the configuration as one finds in the commonly known "pads".
It is observed that JP 63178191 discloses a flat, rigid sheet-shaped heat storing element with a thickness of 10-20 mm containing in its interior a polymeric material to which electrically conducting particles (metal or carbon black) is added, and which has heat-storage properties by the addition of latent heat storage material which is dispersed in and bounded to, the polymeric material. It is provided on opposite end surfaces with plate shaped electrical elements so that the interior and the heat storing material can be heated by sending an electrical current flowing therethrough. The problem for which the invention provides a solution does not even arise here and the solution itself is not known from, non obvious after, this prior art.
US 2003/124318 Al discloses a generally flat sheet-shaped insulating article of which no dimensions are given, filled with non-encapsulated phase change material which is impregnated with a foam-like base layer divided into a number of regions, each bounded by two opposite barrier layers and separated from each other by boundary lines. The aim is to prevent migration of the phase change material which is held immobile in the respective base layers. There is in this disclosure nothing that could lead to the inventive proposal. EP 0003442 discloses a flat heat absorbing panel with two relatively thick outer walls which houses a container from metal foil, divided by a central wall into two chambers, each filled with phase change material such as an incongruent aqueous mixture of glauber salts. Nothing in this disclosure points to the specific structure proposed by . the invention.
A powder-like mixture of silica particles and a phase change material is known from US 5254380. The idea is to use the silica particles as a suspension medium for the phase change material. This publication has no bearing on the present invention.
US 6230444 Bl relates to the positioning of phase change material at the ceiling and the floor of a room respectively and does not have any bearing on the invention.
US 462516 describes a hollow plate-like panel with two opposite end walls between which is fitted with a honeycomb structure in which phase change material is enclosed.
Finally JP 62 124182 describes a heat storage element useful as a pocket heater comprising granular heat storage material uniformly distributed into a curable carrier substance covered by an outer coating. There is no bearing on the present invention.
The invention is elucidated on the hand of the drawing. Therein shows: fig. Ia an upper view of a container according to the "invention; fig. 2 a cross-section of this container over the line Ib-Ib in fig. Ia.
The container as shown in the drawings and denoted therein with reference numeral 2 has two main surfaces: the upper surface 4 and the lower surface 6. .The mean distance between these main surfaces is indicated in fig. Ib by "d".
In the shown embodiment these two main surfaces have a circular configuration but it is clear that a polygonal configuration is also possible.
The main surface 4 continues via and upstanding edge 8 into the circumferential edge 10 which is, in a suitable way
(gluing, welding) connected to the outer edge part 12 of the lower main surface 6. The space between the main surface 4, the upstanding edge 8 and the main surface 6 is filled with phase change material 14. According to the invention the mean distance d is smaller than 20 mm and particularly smaller than
10 mm. In this way the distance between the middle plane 4 of the container 2 and each of the respective main surfaces 4, 6 is not greater than 10 and 5 mm respectively and the aimed effect is thus obtained.
It is clear that within the scope of the invention many changes are possible. Particularly the main surfaces can be corrugated to increase the effective surface thereof, or can be provided with pressed-through parts.

Claims

1. Container filled with heat accumulating phase change material, characterised in that it has a generally flat configuration and is bounded by two distant main surfaces, this distance having a mean value (d) smaller than 20 mm, while the phase change material is present therein in powder or granular form.
2. Container according to claim 1, characterised in that the mean distance is smaller than 10 mm.
3. Container according to claims 1-2, characterised in that the configuration of the main surfaces is a circle shape or a polygonal .
4. Container according to claims 1-3, characterised in that a first main surface continues via an upstanding edge part in a circumferential edge which is sealingly connected to the circumferential edge of the second main surface.
5. Container according to claims 1-4, characterised in that the diameter of the main surfaces lies between 40 and 60 mm and the distance therebetween lies between 6 and 8 mm.
PCT/NL2010/000094 2009-06-19 2010-06-08 Container filled with heat accumulating phase change material WO2010147457A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1037049A NL1037049C2 (en) 2009-06-19 2009-06-19 HOLDER FILLED WITH HEAT ACCUMULATING PHASE TRANSITION MATERIAL.
NL1037049 2009-06-19

Publications (2)

Publication Number Publication Date
WO2010147457A2 true WO2010147457A2 (en) 2010-12-23
WO2010147457A3 WO2010147457A3 (en) 2011-11-03

Family

ID=41650364

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2010/000094 WO2010147457A2 (en) 2009-06-19 2010-06-08 Container filled with heat accumulating phase change material

Country Status (2)

Country Link
NL (1) NL1037049C2 (en)
WO (1) WO2010147457A2 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US462516A (en) 1891-11-03 Railway-ticket
EP0003442A1 (en) 1978-02-01 1979-08-08 Architectural Research Corporation Heat absorbing panel
JPS62124182A (en) 1985-11-26 1987-06-05 Matsushita Electric Ind Co Ltd Production of heat storage element
JPS63178191A (en) 1987-01-16 1988-07-22 Nok Corp Composite heat storage article
US5254380A (en) 1985-11-22 1993-10-19 University Of Dayton Dry powder mixes comprising phase change materials
US6230444B1 (en) 1997-03-26 2001-05-15 Outlast Technologies, Inc. Building conditioning technique using phase change materials
US20030124318A1 (en) 2002-01-02 2003-07-03 Magill Monte C. Thermal barriers with reversible enhanced thermal properties

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618597A (en) * 1984-06-21 1986-01-16 Sumitomo Chem Co Ltd Hollow planar body for heat accumulating panel and manufacture thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US462516A (en) 1891-11-03 Railway-ticket
EP0003442A1 (en) 1978-02-01 1979-08-08 Architectural Research Corporation Heat absorbing panel
US5254380A (en) 1985-11-22 1993-10-19 University Of Dayton Dry powder mixes comprising phase change materials
JPS62124182A (en) 1985-11-26 1987-06-05 Matsushita Electric Ind Co Ltd Production of heat storage element
JPS63178191A (en) 1987-01-16 1988-07-22 Nok Corp Composite heat storage article
US6230444B1 (en) 1997-03-26 2001-05-15 Outlast Technologies, Inc. Building conditioning technique using phase change materials
US20030124318A1 (en) 2002-01-02 2003-07-03 Magill Monte C. Thermal barriers with reversible enhanced thermal properties

Also Published As

Publication number Publication date
NL1037049C2 (en) 2010-12-21
WO2010147457A3 (en) 2011-11-03

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