DE4404780A1 - Heat storage system for solar or other heat energy - Google Patents

Heat storage system for solar or other heat energy

Info

Publication number
DE4404780A1
DE4404780A1 DE4404780A DE4404780A DE4404780A1 DE 4404780 A1 DE4404780 A1 DE 4404780A1 DE 4404780 A DE4404780 A DE 4404780A DE 4404780 A DE4404780 A DE 4404780A DE 4404780 A1 DE4404780 A1 DE 4404780A1
Authority
DE
Germany
Prior art keywords
heat
storage
latent
heat storage
storage system
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
DE4404780A
Other languages
German (de)
Inventor
Rudolf Weber
Thilo Lehmann
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.)
LEHMANN MASCHBAU GmbH
Original Assignee
LEHMANN MASCHBAU 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 LEHMANN MASCHBAU GmbH filed Critical LEHMANN MASCHBAU GmbH
Priority to DE4404780A priority Critical patent/DE4404780A1/en
Publication of DE4404780A1 publication Critical patent/DE4404780A1/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Abstract

A heat storage system for storing solar energy or other heat energy comprises a pref. cubic housing contg. a latent heat storage material (I). The heat to be stored is introduced via heat exchangers with a large surface area, arranged in a stack so that, as far as possible, the same amt. of heat is supplied to (I) at every point in the housing, even in the absence of convection.

Description

Die Erfindung betrifft eine Wärmespeicheranordnung, bei der die ther­ mische Energie überwiegend als latente Wärme vorzugsweise in einem Salzhydrat gespeichert wird.The invention relates to a heat storage arrangement in which the ther Mix energy mainly as latent heat, preferably in one Salt hydrate is stored.

Um Wärmeenergie, insbesondere die diskontinuierlich anfallende Solar­ energie, die meist dann in ausreichendem Maße zur Verfügung steht, wenn der Bedarf am geringsten ist, vorteilhaft nutzen zu können, ist es notwendig, diese bis zum Verbrauch zu speichern, wobei in der Regel Wasser als Speichermedium Verwendung findet. Trotz der hohen spezifi­ schen Wärme des Wassers nehmen aber derartige Wärmespeicher bei größe­ ren Kapazitäten ziemliche Ausmaße an, insbesondere dann, wenn zur Überbrückung von Schlechtwetterperioden der Wärmebedarf für mehrere Tage gespeichert werden soll.About thermal energy, especially discontinuous solar energy that is usually available to a sufficient extent, when the need is least to be able to be used advantageously it is necessary to save this until consumption, as a rule Water is used as a storage medium. Despite the high spec But heat of the water takes such heat storage at size capacities, especially when bridging from bad weather periods the heat requirement for several days should be saved.

Es ist bekannt, daß man Wärmeenergie auch als latente Wärme in geeig­ neten Medien speichern kann, die bei einer nutzbaren Temperatur ihren Aggregatzustand ändern und dabei zum Teil erhebliche Wärmemengen auf­ nehmen bzw. abgeben. Das ist z. B. bei bestimmten Salzhydraten oder Fettsäuren der Fall. Dabei läßt sich mit geeigneten Speichermassen in einem bestimmten Volumen innerhalb eines begrenzten Temperaturin­ tervalles theoretisch die bis zu 5fache Wärmemenge gegenüber Wasser speichern. It is known that heat energy is also suitable as latent heat neten media that can be stored at a usable temperature Change state of matter and, in some cases, considerable amounts of heat take or deliver. That is e.g. B. with certain salt hydrates or Fatty acids the case. Suitable storage masses can be used in a certain volume within a limited temperature theoretically up to 5 times the amount of heat compared to water to save.  

Tatsächlich hatte jedoch die Wärmespeicherung in Latentspeichermedien bisher nur wenig Bedeutung, da sie in der Praxis mit erheblichen Schwierigkeiten verbunden ist. Dabei ist in erster Linie die völlig fehlende Konvektion und die geringe Wärmeleitfähigkeit im festen bzw. kristallinen Zustand zu nennen, was die Verwendung der allgemein üblichen Rohrwärmetauscher, deren Funktion allein von der Nutzung der Konvektion abhängt, ausschließt, da die Wärmeabnahme dabei völlig ungenügend ist.In fact, however, the heat storage had in latent storage media So far, it has been of little importance, as it has considerable Difficulties. In the first place, that is completely lack of convection and the low thermal conductivity in the fixed or crystalline state to call what the use of the general usual tube heat exchanger, the function of which depends solely on the use depends on the convection, because the heat loss completely is insufficient.

Desweiteren sind viele der zum Speichern geeigneten Salzhydrate ge­ genüber Metallen aggressiv, so daß entweder ein Kunststoff als Be­ hälter und Wärmetauschermaterial verwendet werden müßte, was wie­ derum Probleme bezüglich Wärmefestigkeit und Wärmeleitfähigkeit macht oder andere Maßnahmen zur Vermeidung von Korrosion getroffen werden müßten.Furthermore, many of the salt hydrates suitable for storage are ge aggressive towards metals, so that either a plastic as Be Containers and heat exchanger material should be used, what how therefore problems regarding heat resistance and thermal conductivity makes or other measures to avoid corrosion should be.

Die Erfindung betrifft einen Wärmespeicher, der allein oder in Verbindung mit einem üblichen Wasserspeicher genutzt werden kann und dessen Wärme in einem Medium gespeichert wird, welches durch Ände­ rung seines Aggregatzustandes die zugeführte Wärme als latente Wärme aufnimmt und als solche auch wieder abgibt, wobei die Schwie­ rigkeiten, die bisher einer praktischen Nutzung im Wege waren, durch besondere konstruktive Maßnahmen und geeigneter Materialwahl umgangen werden. The invention relates to a heat accumulator that alone or in Connection with a conventional water storage can be used and the heat of which is stored in a medium which can be changed his aggregate state, the heat supplied as latent Absorbs heat and as such releases it again, the Schwie that previously hindered practical use bypassed special design measures and a suitable choice of materials become.  

Da das im kalten, also festen Zustand befindliche Speichermedium keine Konvektion zuläßt, wird die zu speichernde Wärme über mehrere große Flächen eines gut wärmeleitenden Materials, z. B. Aluminium, eingebracht, die wiederum von Solekreislauf der Solaranlage oder einer sonstigen Heizeinrichtung durchströmt werden.Since the storage medium is in the cold, i.e. solid, state no convection allows the heat to be stored over several large areas of a good heat-conducting material, e.g. B. aluminum, introduced, which in turn by brine circuit of the solar system or flow through another heating device.

Die Flächen, zwischen denen sich das Speichermedium befindet, sind in geringem Abstand nebeneinander angeordnet und füllen weitgehend den Innenraum des vorzugsweise kastenförmigen Speichers aus. Da­ durch wird eine gute Verteilung der einzubringenden Wärme über das ganze Speichervolumen erreicht und die durch Wärmeleitung zu über­ brückenden Strecken sehr klein gehalten.The areas between which the storage medium is located are arranged close to each other and largely fill the interior of the preferably box-shaped memory. There is a good distribution of the heat to be introduced over the entire storage volume is reached and that through heat conduction bridging routes kept very small.

Der Wärmeaustrag erfolgt vorzugsweise über die gleichen Wärmetau­ scherflächen, kann aber auch durch andere geeignete Maßnahmen, z. B. durch einen innerhalb des Speichers befindlichen separaten Wärmetauschers, erfolgen.The heat is preferably discharged through the same heat accumulation shear areas, but can also be taken by other suitable measures, e.g. B. by a separate located within the memory Heat exchanger take place.

Durch die Verwendung ausgesuchter geeigneter Materialien sowohl für den Speicherbehälter, die Wärmetauscher als auch des Latent­ speichermediums ist es möglich, bei guten Wärme- und Speicher­ eigenschaften eine hohe Korrosionsfestigkeit zu erreichen.By using selected suitable materials both for the storage tank, the heat exchanger and the latent storage medium, it is possible with good heat and storage properties to achieve high corrosion resistance.

Erfindungsgemäß wird als Speicher- und Wärmetauschermaterial Rein­ aluminium oder eine Al-Mg-Legierung verwendet. Das Speichermedium ist Natriumazetat CH₃ COO Na * 3 H₂O. Reinaluminium oder mit Magne­ sium legiertes Aluminium ist gegen Natriumazetat weitgehend be­ ständig. Die normalerweise leicht basische Reaktion der Lösung kann durch einen Überschuß an freier Essigsäure CH₃-COOH neutralisiert werden. Da CH₃-COONa eine starke Pufferlösung ist, stellt sich auch bei extrem hohem CH₃-COOH-Überschuß ein PH-Wert nahe 7 ein. Natriumazetat * 3 H₂O hat einen Schmelzpunkt von 55°C und nimmt dabei 0,11 kWh/kg Wärme auf, die beim Erstarren wieder abgegeben wird. Es ist außerdem physiologisch weitgehend unbedenklich und bereitet keine außergewöhnlichen Entsorgungsprobleme.According to the invention, pure aluminum or an Al-Mg alloy is used as the storage and heat exchange material. The storage medium is sodium acetate CH₃COO Na * 3 H₂O. Pure aluminum or aluminum alloyed with magnesium is largely resistant to sodium acetate. The normally slightly basic reaction of the solution can be neutralized by an excess of free acetic acid CH₃-COOH. Since CH₃-COONa is a strong buffer solution, a pH value close to 7 is established even with an extremely high CH₃-COOH excess. Sodium acetate * 3 H₂O has a melting point of 55 ° C and absorbs 0.11 kWh / kg of heat, which is released again when it solidifies. It is also largely physiologically safe and does not cause any extraordinary disposal problems.

Durch die folgenden Darstellungen soll der Erfindungsgedanke näher erläutert werden.The following representations are intended to illustrate the inventive concept are explained.

In einem, vorzugsweise kubischem, von einer Isolation A umgebenen Gehäuse B befinden sich mehrere nebeneinander angeordnete Flächen C aus Aluminium, die mit Kanälen oder Rohren D versehen sind, durch die ein Wärmeübertragungsmedium, vorzugsweise ein Wasser-Glykolge­ misch fließt und seine Wärme auf die Flächen überträgt.In a, preferably cubic one, surrounded by insulation A. Housing B has a plurality of surfaces C arranged side by side made of aluminum, which are provided with channels or pipes D, through which is a heat transfer medium, preferably a water glycol sequence mix flows and transfers its heat to the surfaces.

Der gesamte Innenraum E ist mit dem Latentspeichermedium CH₃-COONa * 3 H₂O ausgefüllt. Werden die Flächen C von einem Wärmeübertragungsmedium mit einer Temperatur < 55°C durchflossen, beginnt das Latentspeichermedium zu schmelzen und nimmt die einge­ tragene Wärme als latente Wärme auf. Ist die Temperatur des Über­ tragungsmediums < 55°C erstarrt das Speichermedium und gibt die gespeicherte Wärme an das Übertragungsmedium wieder ab.The entire interior E is filled with the latent storage medium CH₃-COONa * 3 H₂O. If the surfaces C are flowed through by a heat transfer medium with a temperature <55 ° C, the latent storage medium begins to melt and absorbs the heat entered as latent heat. If the temperature of the transmission medium is <55 ° C, the storage medium solidifies and releases the stored heat to the transmission medium again.

Claims (3)

1. Wärmespeicheranordnung zum Speichern von Solarstrahlungs- oder anderer Wärmeenergie, bestehend aus einem, eine La­ tentspeichermasse enthaltenden vorzugsweise quaderförmigen Gehäuse, dadurch gekennzeichnet, daß die zu speichernde Wärme über großflächige Wärmetauscher eingebracht wird, die paketartig so angeordnet sind, daß der Latentspeichermasse an jeder Stelle im Gehäuse auch bei fehlender Konvektion möglichst die gleiche Wärmemenge zugeführt wird.1. Heat storage arrangement for storing solar radiation or other thermal energy, consisting of a, preferably a rectangular storage mass containing a La storage mass, characterized in that the heat to be stored is introduced via large-area heat exchangers, which are arranged in packets such that the latent storage mass at any point the same amount of heat is supplied as possible in the housing even in the absence of convection. 2. Wärmespeicheranordnung nach Anspruch 1, dadurch gekennzeich­ net, daß als Wärmetauschermaterial Aluminium oder eine Al-Mg-Legierung und als Latentspeichermasse Natriumazetat CH₃-COONa * 3 H₂O verwendet wird.2. Heat storage arrangement according to claim 1, characterized in that aluminum or an Al-Mg alloy is used as the heat exchanger material and sodium acetate CH₃-COONa * 3 H₂O is used as the latent storage material. 3. Wärmespeicheranordnung nach Anspruch 1 und 2, dadurch gekenn­ zeichnet, daß durch einen Überschuß freier Essigsäure CH₃-COOH ein Ph-Wert der Latentspeichermasse nahe 7 einge­ stellt wird.3. Heat storage arrangement according to claim 1 and 2, characterized records that by an excess of free acetic acid CH₃-COOH a Ph value of the latent storage mass close to 7 is posed.
DE4404780A 1994-02-09 1994-02-09 Heat storage system for solar or other heat energy Ceased DE4404780A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4404780A DE4404780A1 (en) 1994-02-09 1994-02-09 Heat storage system for solar or other heat energy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4404780A DE4404780A1 (en) 1994-02-09 1994-02-09 Heat storage system for solar or other heat energy

Publications (1)

Publication Number Publication Date
DE4404780A1 true DE4404780A1 (en) 1995-08-10

Family

ID=6510292

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4404780A Ceased DE4404780A1 (en) 1994-02-09 1994-02-09 Heat storage system for solar or other heat energy

Country Status (1)

Country Link
DE (1) DE4404780A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236960A1 (en) * 2001-02-28 2002-09-04 High Technology Participation S.A. Preservation apparatus particularly for perishable products at a preset temperature
US6652770B2 (en) * 1995-09-07 2003-11-25 Claude Q. C. Hayes Heat absorbing temperature control devices and method
DE102017124401A1 (en) * 2017-10-19 2019-04-25 Thomas Friedrich Method and device for the air conditioning of rooms via thermally activated concrete elements

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2054777A5 (en) * 1969-07-25 1971-05-07 Renaux Emile Eutectic plaque units
DE2602530B1 (en) * 1976-01-23 1977-05-18 Inst Fuer Kerntechnik & Energ LATENTHEAT STORAGE
AT365325B (en) * 1978-08-09 1982-01-11 Hinterberger Unternehmen Fuer LATENT HEAT STORAGE
DE3034608A1 (en) * 1980-09-13 1982-04-29 Helmut Dr.-Ing. 7261 Gechingen Wiedmann Heat transfer from source to consumer by melt storage medium - to increase distance covered
DE3215012A1 (en) * 1981-04-22 1982-12-16 Thermal Energy Storage, Inc., 92121 San Diego, Calif. DEVICE FOR STORING ENERGY
DE3302324A1 (en) * 1983-01-25 1984-08-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Heat storage arrangement for buildings, in particular for storing solar energy
DE3411399A1 (en) * 1984-03-28 1985-10-10 Philips Patentverwaltung Gmbh, 2000 Hamburg LATENT HEAT STORAGE, METHOD FOR PRODUCING A NUCLEAR IMAGER AND LATENT HEAT STORAGE
WO1989009375A1 (en) * 1988-03-26 1989-10-05 Nikolaos Malatidis Heat accumulator for storing latent heat of transformation based on the heat circulation principle, in particular for use as an automobile heating unit
US5072789A (en) * 1989-12-08 1991-12-17 Showa Aluminum Corporation Heat exchanger made of aluminum
SU1723088A1 (en) * 1990-03-05 1992-03-30 Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции Heat transfer medium for heat pipes made of aluminum and its alloys
DE4133360A1 (en) * 1990-10-19 1992-04-23 Volkswagen Ag Latent heat store - has storage element with single hose cover, located in linear and parallel manner

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2054777A5 (en) * 1969-07-25 1971-05-07 Renaux Emile Eutectic plaque units
DE2602530B1 (en) * 1976-01-23 1977-05-18 Inst Fuer Kerntechnik & Energ LATENTHEAT STORAGE
AT365325B (en) * 1978-08-09 1982-01-11 Hinterberger Unternehmen Fuer LATENT HEAT STORAGE
DE3034608A1 (en) * 1980-09-13 1982-04-29 Helmut Dr.-Ing. 7261 Gechingen Wiedmann Heat transfer from source to consumer by melt storage medium - to increase distance covered
DE3215012A1 (en) * 1981-04-22 1982-12-16 Thermal Energy Storage, Inc., 92121 San Diego, Calif. DEVICE FOR STORING ENERGY
DE3302324A1 (en) * 1983-01-25 1984-08-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Heat storage arrangement for buildings, in particular for storing solar energy
DE3411399A1 (en) * 1984-03-28 1985-10-10 Philips Patentverwaltung Gmbh, 2000 Hamburg LATENT HEAT STORAGE, METHOD FOR PRODUCING A NUCLEAR IMAGER AND LATENT HEAT STORAGE
WO1989009375A1 (en) * 1988-03-26 1989-10-05 Nikolaos Malatidis Heat accumulator for storing latent heat of transformation based on the heat circulation principle, in particular for use as an automobile heating unit
US5072789A (en) * 1989-12-08 1991-12-17 Showa Aluminum Corporation Heat exchanger made of aluminum
SU1723088A1 (en) * 1990-03-05 1992-03-30 Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции Heat transfer medium for heat pipes made of aluminum and its alloys
DE4133360A1 (en) * 1990-10-19 1992-04-23 Volkswagen Ag Latent heat store - has storage element with single hose cover, located in linear and parallel manner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6652770B2 (en) * 1995-09-07 2003-11-25 Claude Q. C. Hayes Heat absorbing temperature control devices and method
EP1236960A1 (en) * 2001-02-28 2002-09-04 High Technology Participation S.A. Preservation apparatus particularly for perishable products at a preset temperature
DE102017124401A1 (en) * 2017-10-19 2019-04-25 Thomas Friedrich Method and device for the air conditioning of rooms via thermally activated concrete elements

Similar Documents

Publication Publication Date Title
DE2602530B1 (en) LATENTHEAT STORAGE
DE102009034772A1 (en) Latent heat storage device, useful for stationary and mobile applications for storage of excess heat from heating source, comprises corrosion-resistant storage container with external insulation, heat exchanger and heat storage materials
DE7730609U1 (en) HEATING AND / OR COOLING DEVICE
DE3242142C2 (en) Latent heat storage pack
DE102011107270A1 (en) Heat storage with a partially filled with fluid container
DE2054057C2 (en) Memory module for temperature control and temperature control of rooms
DE4404780A1 (en) Heat storage system for solar or other heat energy
DE3009623C2 (en) Process for storing and releasing heat
DE60211816T2 (en) Thermosiphon heat storage device
DE4345141A1 (en) Self-insulating latent heat store useful for large-scale heating
DE10108152A1 (en) Latent heat storage device used for storing latent heat comprises a heat exchanger for heating and cooling a latent storage medium arranged in a first storage container located within a second, outer storage container
DE3034608A1 (en) Heat transfer from source to consumer by melt storage medium - to increase distance covered
DE3102869A1 (en) Device for storing heat for heating installations
EP0702776A1 (en) Latent-heat accumulator
DE3910356A1 (en) PCM device
DE2720188C3 (en)
DE2911552A1 (en) Latent heat storage brick - is hollow and of impermele material and filled with heat storage material
DE202007012308U1 (en) Hybrid thermal storage
DE102007002797A1 (en) Use of filled with fusible materials hollow body as latent heat storage
DE2845865A1 (en) Latent heat storage system based on sodium hydroxide - formed as slurry or suspension in circulating heat transfer medium of lower density
DE3020983C2 (en) Latent heat storage means
DE2619514A1 (en) Heat pump thermal storage system - has salt or salt mixture heat storage mass of exothermic crystallisation character
DE3124021C2 (en) Heat storage for a heating system
WO2002012814A1 (en) Latent heat storage device
DE4122436A1 (en) Latent heat accumulator in automotive cooling system - uses two or more storage media contained in different vessels for transferring heat depending on engine temp.

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8131 Rejection