EP1521814A1 - Heat storage means - Google Patents

Heat storage means

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Publication number
EP1521814A1
EP1521814A1 EP03763644A EP03763644A EP1521814A1 EP 1521814 A1 EP1521814 A1 EP 1521814A1 EP 03763644 A EP03763644 A EP 03763644A EP 03763644 A EP03763644 A EP 03763644A EP 1521814 A1 EP1521814 A1 EP 1521814A1
Authority
EP
European Patent Office
Prior art keywords
nitrate
water
mixtures
heat
zinc
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.)
Withdrawn
Application number
EP03763644A
Other languages
German (de)
French (fr)
Inventor
Mark Neuschuetz
Ralf Glausch
Dawen Zeng
Wolfgang Voigt
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.)
Merck Patent GmbH
Original Assignee
Merck Patent GmbH
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 Merck Patent GmbH filed Critical Merck Patent GmbH
Publication of EP1521814A1 publication Critical patent/EP1521814A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/085—Acids or salts thereof containing nitrogen in the anion, e.g. nitrites
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0071—Phase-change materials, e.g. latent heat storage materials used in concrete compositions

Definitions

  • the present invention relates to phase change materials (PCM) for storing thermal energy in the form of phase change heat based on ternary mixtures, composed of water and two salts from the group zinc nitrate, lithium nitrate, calcium nitrate, magnesium nitrate, potassium nitrate, sodium nitrate, their production and their use.
  • PCM phase change materials
  • Heat exchangers are usually used for this. They contain heat transfer media that transport heat from one place or medium to another. To dissipate heat peaks e.g. the heat is released into the air via a heat exchanger. However, this heat is then no longer available to compensate for heat deficits. The use of heat stores solves this problem.
  • Known storage media are e.g. Water or stones / concrete to store sensible (“sensitive”) heat or phase change materials (PCM) such as salts, salt hydrates or their mixtures to store heat in the form of heat of fusion (“latent" heat).
  • sensitive sensible
  • PCM phase change materials
  • a higher temperature is required for charging a heat store than can be obtained during unloading, since a temperature difference is required for the transport of heat.
  • the quality of the heat depends on the temperature at which it is available again: the higher the temperature, the more versatile the heat can be used. For this reason, it is desirable that the temperature level drop as little as possible during storage.
  • latent heat storage In the case of sensitive heat storage (e.g. by heating water), the entry of heat is associated with a constant heating of the storage material (and vice versa during unloading), while latent heat is stored and discharged at the melting temperature of the PCM. Compared to sensitive heat storage, latent heat storage therefore has the advantage that the temperature loss is limited to the loss during heat transport from and to the storage.
  • Inorganic salts and in particular their hydrates, are known to be substances with the highest specific heat of fusion and thus favored as latent heat storage (PCM).
  • PCM latent heat storage
  • their technical use depends on a number of other properties, such as supercooling and stratification, which greatly limits the use of the few PCMs known to date.
  • Paraffin is problematic in the construction sector due to its flammability.
  • the inorganic materials show strong stratification (incongruent
  • PCM Phase Change Materials
  • the present invention relates to an agent for storing heat, containing ternary mixtures, composed of water and two salts of the group lithium nitrate, sodium nitrate, magnesium nitrate, potassium nitrate, calcium nitrate, zinc nitrate.
  • the invention also relates to ternary mixtures selected from the group consisting of zinc nitrate-lithium nitrate-water, zinc nitrate-calcium nitrate-water, lithium nitrate-sodium nitrate-water or zinc nitrate-magnesium nitrate-water.
  • the invention also relates to a process for the preparation of these mixtures and the use, if appropriate with auxiliaries, as a storage medium in latent heat stores, for thermostatting buildings, in plaster or in or on blinds, and in air conditioning devices for motor vehicles, transport or storage devices.
  • auxiliaries as a storage medium in latent heat stores, for thermostatting buildings, in plaster or in or on blinds, and in air conditioning devices for motor vehicles, transport or storage devices.
  • TWD transparent thermal insulation systems
  • Thermostat in the sense of the present invention means both the thermal insulation and thus keeping a temperature constant, as well as the interception of short-term temperature fluctuations or peaks.
  • Applications can include heat storage and targeted delivery, as well as heat absorption and cooling.
  • a phase change material which contains water and two salts of the group lithium nitrate, sodium nitrate, magnesium nitrate, potassium nitrate, calcium nitrate, zinc nitrate is defined as the inventive means for storing heat.
  • the respective hydrates of these compounds can also be used.
  • the systems lithium nitrate-zinc nitrate-water are particularly preferred.
  • the agents according to the invention have their melting points in the desired temperature range around 25.degree.
  • composition of the mixtures is in the range from 1 to 70% by mass, preferably from 7 to 58% by mass.
  • the salts and water or their hydrates are melted and mixed well by vigorous stirring.
  • a protective tube can be placed on the equipment to prevent the water vapor from escaping. This allows the mixing ratio of the components to be kept constant.
  • the crystallization can also be initiated by acoustic or mechanical stress.
  • the mixtures according to the invention can also contain nucleating agents.
  • mixtures according to the invention can also be microencapsulated or macroencapsulated, if appropriate with the addition of further auxiliaries.
  • the following examples are intended to explain the invention in more detail without, however, restricting it.
  • the melting points of these mixtures are in the desired temperature range around 25 ° C.
  • the melting point of the mixture is 65 ° C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Building Environments (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

The invention relates to phase change materials (PCM) for storing heat in the form of phase change heat and to the use of said materials.

Description

Mittel zur Speicherung von Wärme Means for storing heat
Die vorliegende Erfindung betrifft Phase Change Materialien (PCM) zur Speicherung von Wärmeenergie in Form von Phasenumwandlungswärme auf Basis von ternären Gemischen, zusammengesetzt aus Wasser und zwei Salzen der Gruppe Zinknitrat, Lithiumnitrat, Calciumnitrat, Magnesiumnitrat, Kaliumnitrat, Natriumnitrat, deren Herstellung sowie deren Verwendung.The present invention relates to phase change materials (PCM) for storing thermal energy in the form of phase change heat based on ternary mixtures, composed of water and two salts from the group zinc nitrate, lithium nitrate, calcium nitrate, magnesium nitrate, potassium nitrate, sodium nitrate, their production and their use.
In technischen Prozessen müssen oft Wärmespitzen oder -defizite vermieden werden, d.h. es muss thermostatisiert werden. Üblicherweise werden dazu Wärmeaustauscher verwendet. Sie enthalten Wärmeübertragungsmittel die Wärme von einem Ort oder Medium zu einem anderen transportieren. Um Wärmespitzen abzuführen wird z.B. die Abgabe der Wärme über einen Wärmetauscher an die Luft genutzt. Diese Wärme steht dann allerdings nicht mehr zum Ausgleich von Wärmedefiziten zur Verfügung. Dieses Problem löst der Einsatz von Wärmespeichern.In technical processes, heat peaks or deficits often have to be avoided, i.e. it must be thermostatted. Heat exchangers are usually used for this. They contain heat transfer media that transport heat from one place or medium to another. To dissipate heat peaks e.g. the heat is released into the air via a heat exchanger. However, this heat is then no longer available to compensate for heat deficits. The use of heat stores solves this problem.
Als Speichermedien bekannt sind z.B. Wasser oder Steine/Beton um fühlbare ("sensible") Wärme zu speichern oder Phasenwechselmaterialien (Phase Change Materials, PCM) wie Salze, Salzhydrate oder deren Gemische um Wärme in Form von Schmelzwärme ("latenter" Wärme) zu speichern.Known storage media are e.g. Water or stones / concrete to store sensible ("sensitive") heat or phase change materials (PCM) such as salts, salt hydrates or their mixtures to store heat in the form of heat of fusion ("latent" heat).
Es ist bekannt, dass beim Schmelzen einer Substanz, d.h. beim Übergang von der festen in die flüssige Phase, Wärme verbraucht, d.h. aufgenommen wird, die, solange der flüssige Zustand bestehen bleibt, latent gespeichert wird, und dass diese latente Wärme beim Erstarren, d.h. beim Übergang von der flüssigen in die feste Phase, wieder frei wird.It is known that when a substance is melted, i.e. in the transition from the solid to the liquid phase, heat is consumed, i.e. is recorded, which is stored latently as long as the liquid state remains, and that this latent heat during solidification, i.e. in the transition from the liquid to the solid phase, is released again.
Grundsätzlich ist für das Laden eines Wärmespeichers eine höhere Temperatur erforderlich als beim Entladen erhalten werden kann, da für den Transport Fluss von Wärme eine Temperaturdifferenz erforderlich ist. Die Qualität der Wärme ist dabei von der Temperatur, bei der sie wieder zur Verfügung steht, abhängig: Je höher die Temperatur ist, desto vielseitiger kann die Wärme eingesetzt werden. Aus diesem Grund ist es erstrebenswert, dass das Temperaturniveau bei der Speicherung so wenig wie möglich absinkt.Basically, a higher temperature is required for charging a heat store than can be obtained during unloading, since a temperature difference is required for the transport of heat. The quality of the heat depends on the temperature at which it is available again: the higher the temperature, the more versatile the heat can be used. For this reason, it is desirable that the temperature level drop as little as possible during storage.
Bei sensibler Wärmespeicherung (z.B. durch Erhitzen von Wasser) ist mit dem Eintrag von Wärme eine stetige Erhitzung des Speichermaterials verbunden (und umgekehrt beim Entladen), während latente Wärme bei der Schmelztemperatur des PCM gespeichert und entladen wird. Latente Wärmespeicherung hat daher gegenüber sensibler Wärmespeicherung den Vorteil, dass sich der Temperaturverlust auf den Verlust beim Wärmetransport vom und zum Speicher beschränkt.In the case of sensitive heat storage (e.g. by heating water), the entry of heat is associated with a constant heating of the storage material (and vice versa during unloading), while latent heat is stored and discharged at the melting temperature of the PCM. Compared to sensitive heat storage, latent heat storage therefore has the advantage that the temperature loss is limited to the loss during heat transport from and to the storage.
Bislang werden als Speichermedium in Latentwärmespeichern üblicherweise Substanzen eingesetzt, die im für die Anwendung wesentlichen Temperaturbereich einen fest-flüssig-Phasenübergang aufweisen, d.h. Substanzen, die bei der Anwendung schmelzen.So far, substances have been used as the storage medium in latent heat storage devices which have a solid-liquid phase transition in the temperature range essential for the application, i.e. Substances that melt when used.
Anorganische Salze und insbesondere deren Hydrate sind bekanntermaßen Stoffe mit den höchsten spezifischen Schmelzwärmen und damit als Latentwärmespeicher (PCM) favorisiert. Ihr technischer Einsatz hängt außer von einer geeigneten Schmelztemperatur und -wärme von einer Reihe weiterer Eigenschaften, wie Unterkühlung und Stratifikation ab, was die Anwendung der wenigen bisher bekannten PCMs sehr einschränkt.Inorganic salts, and in particular their hydrates, are known to be substances with the highest specific heat of fusion and thus favored as latent heat storage (PCM). In addition to a suitable melting temperature and heat, their technical use depends on a number of other properties, such as supercooling and stratification, which greatly limits the use of the few PCMs known to date.
Es sind nur wenige PCMs für den Temperaturbereich um 25°C bekannt. Dieser Bereich ist jedoch für den Baubereich sehr interessant. Bekannt sind Paraffine und Lithiumnitrat Trihydrat mit einem Schmelzpunkt von 29°C, Kaliumfluorid Tetrahydrat mit einem Schmelzpunkt von 18°C und Glaubersalz mit 24°C.Only a few PCMs are known for the temperature range around 25 ° C. However, this area is very interesting for the construction area. Paraffins and lithium nitrate trihydrate with a melting point of 29 ° C, potassium fluoride tetrahydrate with a melting point of 18 ° C and Glauber's salt with 24 ° C are known.
Paraffin ist aufgrund seiner Brennbarkeit problematisch im Baubereich. Die anorganischen Materialien weisen starke Stratifikation (inkongruentesParaffin is problematic in the construction sector due to its flammability. The inorganic materials show strong stratification (incongruent
Schmelzverhalten) und/oder eine große Neigung zur Unterkühlung auf. Aufgabe war es, zyklenstabile Phase Change Materials (PCM) zur Wärmespeicherung und -pufferung im Temperaturbereich um 25°C bereitzustellen.Melting behavior) and / or a great tendency to hypothermia. The task was to provide cycle-stable Phase Change Materials (PCM) for heat storage and buffering in the temperature range around 25 ° C.
Gegenstand der vorliegenden Erfindung ist ein Mittel zur Speicherung von Wärme, enthaltend ternäre Gemische, zusammengesetzt aus Wasser und zwei Salzen der Gruppe Lithiumnitrat, Natriumnitrat, Magnesiumnitrat, Kaliumnitrat, Calciumnitrat, Zinknitrat. Gegenstand der Erfindung sind auch ternäre Gemische ausgewählt aus der Gruppe Zinknitrat- Lithiumnitrat- Wasser, Zinknitrat-Calciumnitrat-Wasser, Lithiumnitrat-Natriumnitrat-Wasser oder Zinknitrat-Magnesiumnitrat-Wasser. Gegenstand der Erfindung ist ebenso ein Verfahren zur Herstellung dieser Gemische und die Verwendung, gegebenenfalls mit Hilfsstoffen, als Speichermedium in Latentwärmespeichern, zur Thermostatisierung von Gebäuden, im Putz oder in bzw. auf Jalousien, sowie in Klimatisierungsvorrichtungen für Kraftfahrzeuge, Transport- oder Lagervorrichtungen. Ein Einsatz in transparenten Wärmedämmsystemen (TWD) ist möglich, aber auch in Innen- und Außenwänden und Decken zur Erhöhung der „thermischen Masse".The present invention relates to an agent for storing heat, containing ternary mixtures, composed of water and two salts of the group lithium nitrate, sodium nitrate, magnesium nitrate, potassium nitrate, calcium nitrate, zinc nitrate. The invention also relates to ternary mixtures selected from the group consisting of zinc nitrate-lithium nitrate-water, zinc nitrate-calcium nitrate-water, lithium nitrate-sodium nitrate-water or zinc nitrate-magnesium nitrate-water. The invention also relates to a process for the preparation of these mixtures and the use, if appropriate with auxiliaries, as a storage medium in latent heat stores, for thermostatting buildings, in plaster or in or on blinds, and in air conditioning devices for motor vehicles, transport or storage devices. Use in transparent thermal insulation systems (TWD) is possible, but also in interior and exterior walls and ceilings to increase the "thermal mass".
Thermostatisierung im Sinne der vorliegenden Erfindung meint dabei sowohl die thermische Isolation und damit das konstant Halten einer Temperatur, wie auch das Abfangen kurzzeitiger Temperaturschwankungen oder - spitzen. Anwendungen können dabei sowohl in einer Wärmespeicherung und gezielten Abgabe, als auch in einer Aufnahme von Wärme und damit verbunden einer Kühlung bestehen.Thermostat in the sense of the present invention means both the thermal insulation and thus keeping a temperature constant, as well as the interception of short-term temperature fluctuations or peaks. Applications can include heat storage and targeted delivery, as well as heat absorption and cooling.
Als erfindungsgemäßes Mittel zur Speicherung von Wärme wird ein Phase- Change-Material (PCM) definiert, das Wasser und zwei Salze der Gruppe Lithiumnitrat, Natriumnitrat, Magnesiumnitrat, Kaliumnitrat, Calciumnitrat, Zinknitrat enthält. Es können auch die jeweiligen Hydrate dieser Verbindungen eingesetzt werden.A phase change material (PCM) which contains water and two salts of the group lithium nitrate, sodium nitrate, magnesium nitrate, potassium nitrate, calcium nitrate, zinc nitrate is defined as the inventive means for storing heat. The respective hydrates of these compounds can also be used.
Besonders bevorzugt sind die Systeme Lithumnitrat-Zinknitrat-Wasser,The systems lithium nitrate-zinc nitrate-water are particularly preferred,
Lithiumnitrat-Natriumnitrat-Wasser, Calciumnitrat-Zinknitrat-Wasser undLithium nitrate sodium nitrate water, calcium nitrate zinc nitrate water and
Magnesiumnitrat-Zinknitrat-Waser.Magnesium nitrate zinc nitrate Waser.
Es wurde gefunden, daß die erfindungsgemäßen Mittel ihre Schmelzpunkte im gewünschten Temperaturbereich um 25°C haben.It has been found that the agents according to the invention have their melting points in the desired temperature range around 25.degree.
Weitere geeignete Gemische sind in der folgenden Tabelle zusammengefasst.Other suitable mixtures are summarized in the following table.
1010
1515
2020
2525
30 30
Tabelle 1: Mischungen Der Phasenübergang fest/flüssig wird durch die Zusammensetzung der Mischungen bestimmt.Table 1: Mixtures The solid / liquid phase transition is determined by the composition of the mixtures.
Die Zusammensetzung der Mischungen liegt im Bereich von 1 bis 70 Massen%, bevorzugt von 7 bis 58 Massen%. Die Salze und Wasser oder ihre Hydrate werden aufgeschmolzen und durch kräftiges Rühren gut durchmischt. Es kann ein Schutzrohr auf die Apparatur gesetzt werden, um zu verhindern, dass der entstehende Wasserdampf entweicht. Dadurch kann das Mischungsverhältnis der Komponenten konstant gehalten werden.The composition of the mixtures is in the range from 1 to 70% by mass, preferably from 7 to 58% by mass. The salts and water or their hydrates are melted and mixed well by vigorous stirring. A protective tube can be placed on the equipment to prevent the water vapor from escaping. This allows the mixing ratio of the components to be kept constant.
Ebenso können andere geeignete Ausgangsmaterialien, wie z.B. Hydroxide, Oxide, Carbonate usw., mit Salpetersäure zu den gewünschten Nitratsalzen umgesetzt werden.Other suitable starting materials, e.g. Hydroxides, oxides, carbonates, etc., are reacted with nitric acid to give the desired nitrate salts.
Nach Abkühlung unterhalb des Schmelzpunktes kann die Kristallisation zusätzlich durch akustische oder mechanische Belastung initiiert werden. Die erfindungsgemäßen Mischungen können neben den Salzmischungen auch Keimbildner enthalten.After cooling below the melting point, the crystallization can also be initiated by acoustic or mechanical stress. In addition to the salt mixtures, the mixtures according to the invention can also contain nucleating agents.
Die erfindungsgemäßen Mischungen können außerdem, gegebenenfalls unter Zusatz von weiteren Hilfsstoffen, mikro- oder makroverkapselt werden. Die nachfolgenden Beispiele sollen die Erfindung näher erläutern, ohne sie jedoch zu beschränken. The mixtures according to the invention can also be microencapsulated or macroencapsulated, if appropriate with the addition of further auxiliaries. The following examples are intended to explain the invention in more detail without, however, restricting it.
BeispieleExamples
Beispiel 1 :Example 1 :
NaNO3-UN03-WasserNaNO 3 -UN0 3 -water
228,5 g Lithiumnitrat und 26,76 g Natriumnitrat werden mit 156,45 g VE- Wasser (voll entsalztes Wasser) in einem Rundhalskolben eingewogen und in einem Heizpilz bei ca. 40°C aufgeschmolzen. Es wird eine klare, leicht gelbliche Schmelze gewonnen. Das Gemisch hat einen Schmelzpunkt von 27,7°C.228.5 g of lithium nitrate and 26.76 g of sodium nitrate are weighed out with 156.45 g of demineralized water (fully demineralized water) in a round-necked flask and melted in a heating element at approx. 40 ° C. A clear, slightly yellowish melt is obtained. The mixture has a melting point of 27.7 ° C.
In analoger Weise werden folgende Gemische dargestellt:The following mixtures are presented in an analogous manner:
Die Schmelzpunkte dieser Gemische liegen im gewünschten Temperaturbereich um 25°C.The melting points of these mixtures are in the desired temperature range around 25 ° C.
Beispiel 2:Example 2:
Mg(N03)2* 6 H20-NaNO3-KN03 Mg (N0 3 ) 2 * 6 H 2 0 -NaNO 3 -KN0 3
Es werden 34,25 g Magnesiumnitrat Hexahydrat mit 3,5 g Natriumnitrat und 12,25 g Kaliumnitrat in einem Rundhalskolben eingewogen. Bei einer Ölbadtemperatur von 90°C werden die Salze unter ständigem Rühren homogen aufgeschmolzen. Es wird eine klare und leicht gelbliche Schmelze gewonnen. Sie kristallisiert durch anschließendes kneten besonders gut.34.25 g of magnesium nitrate hexahydrate with 3.5 g of sodium nitrate and 12.25 g of potassium nitrate are weighed into a round-necked flask. At an oil bath temperature of 90 ° C, the salts are melted homogeneously with constant stirring. A clear and slightly yellowish melt is obtained. It crystallizes particularly well through subsequent kneading.
Der Schmelzpunkt des Gemisches liegt bei 65°C. The melting point of the mixture is 65 ° C.

Claims

Patentansprüche claims
1. Mittel zur Speicherung von Wärme, enthaltend ternäre Gemische, zusammengesetzt aus Wasser und zwei Salzen der Gruppe Lithiumnitrat, Natriumnitrat, Magnesiumnitrat, Kaliumnitrat, Calciumnitrat, Zinknitrat.1. means for storing heat, containing ternary mixtures, composed of water and two salts of the group lithium nitrate, sodium nitrate, magnesium nitrate, potassium nitrate, calcium nitrate, zinc nitrate.
2. Mittel zur Speicherung von Wärme gemäß Anspruch 1 , dadurch gekennzeichnet, daß in den Gemischen der Anteil der einzelnen Komponeneten im Bereich von 1-70 Massen% liegt.2. Means for storing heat according to claim 1, characterized in that the proportion of the individual components in the mixtures is in the range of 1-70 mass%.
3. Mittel zur Speicherung von Wärme gemäß Anspruch 2, dadurch gekennzeichnet, daß in den Gemischen der Anteil der einzelnen Komponeneten im Bereich von 7-58 Massen% liegt.3. Means for storing heat according to claim 2, characterized in that the proportion of the individual components in the mixtures is in the range of 7-58 mass%.
4. Mittel zur Speicherung von Wärme gemäß Anspruch 1 , dadurch gekennzeichnet, daß die Gemische zusammengesetzt sind aus4. Means for storing heat according to claim 1, characterized in that the mixtures are composed of
Zinknitrat- Lithiumnitrat-Wasser, Zinknitrat-Calciumnitrat-Wasser, Lithiumnitrat-Natriumnitrat-Wasser oder Zinknitrat-Magnesiumnitrat- Wasser.Zinc nitrate-lithium nitrate water, zinc nitrate-calcium nitrate water, lithium nitrate-sodium nitrate water or zinc nitrate-magnesium nitrate water.
5. Mittel zur Speicherung von Wärme gemäß Anspruch 1 , dadurch gekennzeichnet, daß das Mittel verkapselt ist.5. Means for storing heat according to claim 1, characterized in that the agent is encapsulated.
6. Verfahren zur Herstellung eines Mittels nach Anspruch 1 , dadurch gekennzeichnet, daß die Gemische von zwei Verbindungen ausgewählt aus der Gruppe Lithiumnitrat, Natriumnitrat, Magnesiumnitrat, Kaliumnitrat, Calciumnitrat, Zinknitrat oder ihre Hydrate und Wasser aufgeschmolzen werden, wobei in der Mischung der Anteil der einzelnen Komponenten im Bereich von 10 bis 90 Mol% liegt, und gegebenenfalls anschließend zur Kristallisation gebracht werden.6. A process for the preparation of an agent according to claim 1, characterized in that the mixtures of two compounds selected from the group lithium nitrate, sodium nitrate, magnesium nitrate, potassium nitrate, calcium nitrate, zinc nitrate or their hydrates and water are melted, the proportion of the individual components is in the range of 10 to 90 mol%, and optionally then brought to crystallization.
7. Verwendung eines Mittels gemäß Anspruch 1 , gegebenenfalls zusammen mit Hilfsstoffen, als Speichermedium in Latentwärmespeichern. 7. Use of an agent according to claim 1, optionally together with auxiliaries, as a storage medium in latent heat stores.
8. Verwendung eines Mittels gemäß Anspruch 1 zur Thermostatisierung von Gebäuden, im Putz oder in bzw. auf Jalousien.8. Use of an agent according to claim 1 for thermostatting buildings, in plaster or in or on blinds.
9. Verwendung eines Mittels gemäß Anspruch 1 in Klimatisierungsvorrichtungen für Kraftfahrzeuge, Transport- oder Lagervorrichtungen.9. Use of an agent according to claim 1 in air conditioning devices for motor vehicles, transport or storage devices.
10. Verwendung eines Mittels gemäß Anspruch 1 in transparenten Wärmedämmsystemen . 10. Use of an agent according to claim 1 in transparent thermal insulation systems.
EP03763644A 2002-07-12 2003-06-17 Heat storage means Withdrawn EP1521814A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10231844 2002-07-12
DE10231844A DE10231844A1 (en) 2002-07-12 2002-07-12 Means for storing heat
PCT/EP2003/006372 WO2004007635A1 (en) 2002-07-12 2003-06-17 Heat storage means

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EP1521814A1 true EP1521814A1 (en) 2005-04-13

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US (1) US20050247906A1 (en)
EP (1) EP1521814A1 (en)
JP (1) JP2005533142A (en)
CN (1) CN1668718A (en)
AU (1) AU2003242718A1 (en)
CA (1) CA2492695A1 (en)
DE (1) DE10231844A1 (en)
WO (1) WO2004007635A1 (en)

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WO2004007635A1 (en) 2004-01-22
JP2005533142A (en) 2005-11-04

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