NL2004246C2 - Heat storage material and its method of manufacturing. - Google Patents

Heat storage material and its method of manufacturing. Download PDF

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Publication number
NL2004246C2
NL2004246C2 NL2004246A NL2004246A NL2004246C2 NL 2004246 C2 NL2004246 C2 NL 2004246C2 NL 2004246 A NL2004246 A NL 2004246A NL 2004246 A NL2004246 A NL 2004246A NL 2004246 C2 NL2004246 C2 NL 2004246C2
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NL
Netherlands
Prior art keywords
heat storage
pcm
storage material
woven material
dome
Prior art date
Application number
NL2004246A
Other languages
Dutch (nl)
Inventor
Laurentius Gerardus Johannes Wolters
Kormelink Marloes Groot
Original Assignee
L G J Wolters Beheer Lichtenvoorde B V
Groot Kormelink
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 L G J Wolters Beheer Lichtenvoorde B V, Groot Kormelink filed Critical L G J Wolters Beheer Lichtenvoorde B V
Priority to NL2004246A priority Critical patent/NL2004246C2/en
Application granted granted Critical
Publication of NL2004246C2 publication Critical patent/NL2004246C2/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • 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
    • F28D20/023—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 being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
    • 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
    • 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
    • F28D2020/0013—Particular heat storage apparatus the heat storage material being enclosed in elements attached to or integral with heat exchange conduits
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Building Environments (AREA)

Description

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Hi CD en H 2' 3 2 an object of the invention can be to increase the heat storage capacity of the heat storage material, while the PCM material remains stabilised in its position.
These and/or other objects are achieved by A heat 5 storage material, comprising an immobilised phase change material (PCM), wherein the PCM is contained in at least on pouch, comprising at least one substantially flat face.
By this arrangement, the heat storage material can be attached to a building material or structure. Thus the 10 PCM can only be located as a cladding on the outside of the construction material. This provides an improved heat transfer and an improved exposure of the PCM, while the heat storage capacity remains high and while the structural integrity of the construction materials remains intact.
15 The heat storage material can further comprise a first sheet material, a second sheet material, wherein the first sheet material comprises a first portion, wherein the first portion is substantially flat, wherein the first sheet material comprises at least one second portion, wherein the 20 at least one second portion is embossed or thermoformed in order to create a preferably dome shaped chamber which is suitable for containing material, wherein the first portion surrounds the at least one second portion, wherein the capsulated PCM is inserted in the second portion and the 25 second sheet material is configured to cover and seal the first sheet material comprising the at least one second embossed or thermoformed portion, thus forming at least one PCM containing pouch.
Since the obtained pouches are substantially flat 30 on one surface, they can practically be attached to any suitable surface. The attachment can be performed by applying a glue or, alternatively, the heat storage material itself can be provided with an attachment layer.
3
The heat storage material can comprise tear lines in the first portion of the first sheet material and/or the thereto attached first portion of the second sheet material.
Thus the separate pouches can easily be separated, 5 without rupture of the pouches themselves. Additionally, by these perforated lines, the material can be torn in predetermined portions of heat storage material. Thus, the size of the individual portions can be designed and adapted to the specific sizes of the relevant construction material. 10 If for instance a gypsum board is to be provided with the heat storage material, the size of a perforation dye can be adapted such that the width and the length of the heat storage material fits on the gypsum board without leaving uncovered spaces and without extending over the outer edges 15 of the gypsum board.
The pressure of the PCM containing chambers of the heat storage material can be reduced to sub-atmospheric or can even as low as substantially vacuum. By applying a reduced pressure, the shape of the pouches is more stable 20 and the conductive heat transfer can be optimised.
The invention further relates to a method for the manufacture of a heat storage material as described hereinabove, comprising the following steps, to be executed in any suitable sequence: a) providing a first sheet of 25 material; b) vacuum forming or embossing a multitude of dome shaped cups in a first portion of the first sheet material; c) filling the dome shaped cups with an encapsulated phase change material (PCM); d) providing a second sheet of material; e) covering the open sides of the dome shaped cups 30 in the first sheet material with the second sheet material; f) applying a reduced pressure to the sheet materials and the PCM contained therein; g) sealing a second portion of the first sheet material surrounding the dome shaped cups to 4 the second sheet material, such that pouches are formed, with at least one substantially flat surface.
By this method, the heat storage material as above described can be obtained. In order to attach the heat 5 storage material, the substantially flat face of the heat storage material can be provided with an affixing layer. The affixing layer can be covered by a protective covering layer. The protective covering layer can be provided with an embossed pattern. Thus, the protective covering layer can be 10 peeled off more practically.
In order to further elucidate the invention, exemplary embodiments will be described with reference to the drawing. In the drawing:
Figure 1 represents a schematic cross sectional 15 side view of the heat storage material according to a first embodiment of the invention;
Figure 2 represents a schematic perspective view of a heat storage material according to a further embodiment of the invention; 20 Figure 3 represents a schematic perspective view of the lay out of the heat storage material according to figure 2;
Figure 4 represents a schematic perspective view of a continuous strip of heat storage material according to 25 the embodiment shown in figure 2 and
Figure 5 represents a schematic sectional side view of a panel comprising the heat storage material according to the embodiment shown in figures 2-4.
The figures represent specific exemplary 30 embodiments of the inventions and should not be considered limiting the invention in any way or form. Throughout the description and the figures the same or corresponding 5 reference numerals are used for the same or corresponding elements .
The expression "cladding" used herein is to be understood as, though not to be considered limited to a 5 covering or overlaying material or composition, having a two dimensions, a length and a width that are considerably larger that its thickness.
The expression "heat storage material" used herein is to be understood as, though not to be considered limited 10 to a substance or a composition with a relative high heat of fusion or dehydration which, is capable of reversible storing and releasing relative large amounts of energy. By choosing the appropriate composition of the heat storage material, a specific melting/fusion or dehydration 15 temperature or a specific melting/fusion hydration/dehydration temperature range can be obtained. The heat storage capacity of PCM can be up to 14 times the heat storage capacity of conventional building materials such as brick, concrete or wood.
20 The expression "phase change material (PCM)" is to be considered a heat storage material as hereinabove defined.
The latent heat storage in PCM's can be achieved by the heat of transformation from one phase into another.
25 Examples for such phase changes are solid-solid, solid- liquid, solid-gas, liquid-gas and hydrated solid-dehydrated solid and water.
The material can be stabilized by encapsulation such that e.g. the PCM cannot migrate in the molten state or 30 e.g. water cannot escape from a salt hydrate in its dehydrated state. Such materials re e.g. sold under the brand name Thermusol (c) by the company Capzo, based in Ootmarsum (Ov), the Netherlands. These materials are in 6 further detail described in the international application WO-A-2008153378, which is incorporated herein by reference in its entirety.
In figure 1, a cross sectional side view of a 5 detail of a pouch 1 with encapsulated heat storage material 2 is presented. In this figure, the pouch 1 comprises a first sheet material 3 and a second sheet material 4, being sealed or glued together in a first portion 5 of the sheet material 3 and 4 and forming a pouch shaped chamber, in a 10 second portion 6 of the sheet material 3 and 4. In the pouch section 6, an encapsulated phase change material 2 is contained. This van be a heat storage material as is described in WO-A-2008153378.
In figure 2, a band of heat storage material 7, 15 comprising a multitude of pouches 1 is depicted. The band 7 comprises sections 10A-10L, each comprising an array of two pouches 1 wide and 12 pouches tall. In between the sections 10A-10L tear lines 8 and 9 are provided for a practical separation of the individual sections 10A-10L.
20 The tear lines are provided in the first portion 5 of the first 3 and/or the second 4 sheet material, such that after the applications of a tension force, a rupture of the material only occurs at the tear lines 8 and 9, leaving the sealed pouches in tact.
25 In figure 3 a schematic lay out plan for a perforation dye is presented. This lay out coincides with the pattern of tear lines 8 and 9 as presented in figure 2.
In figure 4 an endless band of heat storage material 7 is presented.
30 In figure 5 a cross sectional side view of an plate material such as an aluminium plate 11 is depicted.
The plate 11 is provided with a first pouch layer 14 on a first side A of the plate and a second pouch layer 15 on a 7 second side B of the plate 11. The first pouch layer 14 comprises the pouches 1A and IB, formed by the first sheet material 3A and the second sheet material 4A. The second pouch layer 15 comprises the pouches 1C and ID, formed by 5 the first sheet material 3B and the second sheet material 4B.
The pouches are glued on the flat side of the substantially flat layers 4A and 4B.
During manufacturing, the sheet material 3 can be 10 for instance be vacuum formed, embossed, or blown.
The invention is to be understood not to be limited to the exemplary embodiments shown in the figures and described in the specification. For instance the arrays of pouches can be in any width-length combination, even such 15 that every single pouch is surrounded by tear lines.
These and other modifications are considered to be variations that are part of the framework, the spirit and the scope of the invention outlined in the claims.
8
Clauses 1. A heat storage material, comprising: - an immobilised phase change material (PCM); 5 wherein the PCM is contained in at least on pouch, comprising at least one substantially flat surface.
2. A heat storage material according to claus 1, comprising - a first sheet material; 10 - a second sheet material; wherein the first sheet material comprises a first portion, wherein the first portion is substantially flat; wherein the first sheet material comprises at 15 least one second portion; wherein the at least one second portion is embossed or thermoformed in order to create a chamber and is suitable for containing material; wherein the first portion surrounds the at least 20 one second portion; wherein the immobilised PCM is inserted in the embossed portion; and the second sheet material is configured to cover and seal the first sheet material comprising the at 25 least one second embossed or thermoformed portion, thus forming at least one PCM containing pouch.
3. A heat storage material according to any of the preceding clauses, wherein the first portion of the first sheet material and/or the thereto attached first portion of 30 the second sheet material comprise tear lines.
4. A heat storage material according to any of the preceding clauses, wherein in the PCM containing chamber a sub-atmospheric pressure resides.
9 5. A heat storage material according to claus 4, wherein the sub-atmospheric pressure is substantially vacuum.
5 6. Method for the manufacture of a heat storage material according to any of clauses 1-5, comprising the following steps, to be executed in any suitable sequence: a) providing a first sheet of material; b) vacuum forming or embossing a multitude of dome 10 shaped cups in a first portion of the first sheet material; c) filling the dome shaped cups with an encapsulated phase change material (PCM); d) providing a second sheet of material; e) covering the open sides of the dome shaped cups 15 in the first sheet material with the second sheet material; f) applying a reduced pressure to the sheet materials and the PCM contained therein; g) sealing a second portion of the first sheet material surrounding the dome shaped cups to the second 20 sheet material, such that pouches are formed, with a substantially flat surface.
7. Method according to claus 6, wherein the substantially flat face of the heat storage material is provided with a affixing layer.
25 8. Method according to clauses 6 or 7, wherein the affixing layer is covered by a protective covering layer.
9. Method according to claus 8, wherein the protective covering layer is provided with an embossed pattern.
30 10. Method according to any of clauses 6-9, comprising a step of providing at least one tear line in the first portion of the first and second sheet material in between the dome shaped cups.

Claims (10)

1. Een warmteopslagmateriaal omvattend: - een geïmmobiliseerd faseveranderingsmateriaal 5 (PCM, Phase Change Material); waarbij het PCM in ten minste één kussentje wordt gehouden omvattende ten minste één in hoofdzaak vlak oppervlak.A heat storage material comprising: - an immobilized phase change material 5 (PCM, Phase Change Material); wherein the PCM is held in at least one pad comprising at least one substantially flat surface. 2. Een warmteopslagmateriaal volgens conclusie 1, 10 omvattend: - een eerste vliesmateriaal; - een tweede vliesmateriaal; waarbij het eerste vliesmateriaal een eerste deel omvat, 15 waarbij het eerste deel in hoofdzaak vlak is; waarbij het eerste vliesmateriaal ten minste één tweede deel omvat; waarbij het ten minste één tweede deel ingedrukt of onder warmtebehandeling is gevormd om een kamer te 20 creëren en welk tweede deel geschikt is voor het houden van materiaal; waarbij het eerste deel het ten minste ene tweede deel omsluit; waarbij het geïmmobiliseerde PCM in het ingeperste 25 deel wordt ingevoegd; en het tweede vliesmateriaal is ingericht om het eerste vliesmateriaal omvattend het ten minste ene tweede ingeperste of onder warmtebehandeling gevormde deel zodanig dat ten minste één PCM houdend kussen is gevormd.A heat storage material according to claim 1, comprising: - a first non-woven material; - a second non-woven material; wherein the first non-woven material comprises a first part, wherein the first part is substantially flat; wherein the first non-woven material comprises at least one second part; wherein the at least one second portion is depressed or heat-formed to create a chamber and which second portion is suitable for holding material; wherein the first part encloses the at least one second part; wherein the immobilized PCM is inserted in the pressed-in part; and the second non-woven material is arranged around the first non-woven material comprising the at least one second pressed-in or heat-treated part such that at least one PCM-containing pad is formed. 3. Een warmteopslagmateriaal volgens één van de voorgaande conclusies, waarbij het eerste deel van het eerste vliesmateriaal en/of het daaraan verbonden deel van het tweede vliesmateriaal scheurlijnen omvat.A heat storage material according to any one of the preceding claims, wherein the first part of the first non-woven material and / or the part of the second non-woven material connected thereto comprises tear lines. 4. Een warmteopslagmateriaal volgens één van de voorgaande conclusies, waarbij in de PCM omvattende kamer een druk heerst beneden de atmosferische druk.A heat storage material according to any one of the preceding claims, wherein in the chamber comprising PCM, there is a pressure below atmospheric pressure. 5. Een warmteopslagmateriaal volgens de conclusie 5 4, waarbij de verlaagde druk in hoofdzaak vacuüm is.A heat storage material according to claim 5, wherein the reduced pressure is substantially vacuum. 6. Werkwijze voor de fabricage van een warmteopslagmateriaal volgens één van de conclusies 1-5, omvattende de volgende in geschikte volgorde uit te voeren stappen: 10 a) het verschaffen van een eerste vliesmateriaal/ b) het vacuüm vormen of indrukken van een veelvoud van koepelvormige cups in een eerste deel van het eerste vliesmateriaal; c) het vullen van de koepelvormige cups met een 15 ingekapselde fase veranderingsmateriaal (PCM, Phase Change Material); d) het verschaffen van een tweede vliesmateriaal; e) het bedekken van de open zijden van de koepelvormige cups in het eerste vliesmateriaal met het 20 tweede vliesmateriaal; f) het toepassen van een gereduceerde druk op de vliesmaterialen en de PCM die daarin wordt gehouden; g) het afsluiten van een tweede deel van het eerste vliesmateriaal dat de koepelvormige cups omsluit aan 25 het tweede vliesmateriaal, zodanig dat kussentjes worden gevormd, met een in hoofdzaak vlak oppervlak.6. A method for manufacturing a heat storage material according to any one of claims 1-5, comprising the following steps to be carried out in suitable order: a) providing a first non-woven material / b) vacuum forming or pressing a plurality of dome-shaped cups in a first part of the first web material; c) filling the dome-shaped cups with an encapsulated phase change material (PCM, phase change material); d) providing a second web material; e) covering the open sides of the dome-shaped cups in the first web material with the second web material; f) applying a reduced pressure to the web materials and the PCM held therein; g) sealing a second part of the first non-woven material enclosing the dome-shaped cups to the second non-woven material such that pads are formed with a substantially flat surface. 7. Werkwijze volgens conclusie 6, waarbij het in hoofdzaak vlakke oppervlak van het warmteopslagmateriaal is voorzien van een bevestigingslaag.Method according to claim 6, wherein the substantially flat surface of the heat storage material is provided with a fixing layer. 8. Werkwijze volgens de conclusies 6 of 7, waarbij de bevestigingslaag is bedekt met een beschermende deklaag.A method according to claim 6 or 7, wherein the fixing layer is covered with a protective covering layer. 9. Werkwijze volgens conclusie 8, waarbij de beschermende deklaag is voorzien van een ingeperst patroon.The method of claim 8, wherein the protective cover layer is embossed. 10. Werkwijze volgens één van de conclusie 6-9, omvattend de stap van het verschaffen van ten minste één scheurlijn in een eerste deel van het eerste en het tweede vliesmateriaal tussen de koepelvormige cups.The method of any one of claims 6-9, comprising the step of providing at least one tear line in a first portion of the first and second web material between the dome-shaped cups.
NL2004246A 2010-02-15 2010-02-15 Heat storage material and its method of manufacturing. NL2004246C2 (en)

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