WO2009065182A1 - Heat storage - Google Patents

Heat storage Download PDF

Info

Publication number
WO2009065182A1
WO2009065182A1 PCT/AU2008/001730 AU2008001730W WO2009065182A1 WO 2009065182 A1 WO2009065182 A1 WO 2009065182A1 AU 2008001730 W AU2008001730 W AU 2008001730W WO 2009065182 A1 WO2009065182 A1 WO 2009065182A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
reservoir
heat exchanger
outlet
inlet
Prior art date
Application number
PCT/AU2008/001730
Other languages
French (fr)
Inventor
David Bernard Neuwen
Original Assignee
Cool Or Cosy Energy Technology Pty Ltd
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
Priority claimed from AU2007906431A external-priority patent/AU2007906431A0/en
Application filed by Cool Or Cosy Energy Technology Pty Ltd filed Critical Cool Or Cosy Energy Technology Pty Ltd
Publication of WO2009065182A1 publication Critical patent/WO2009065182A1/en

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
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0221—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0235—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy
    • F24D11/0242—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy contained in exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
    • F24H7/04—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid
    • 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
    • F28D20/028—Control arrangements therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/14—Solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • F24D2200/22—Ventilation air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/10—Heat storage materials, e.g. phase change materials or static water enclosed in a space
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

Definitions

  • This invention relates to a heat store.
  • the heat store according to the invention is one which utilises a phase change material which is capable of changing from a liquid to solid phase and in so able to release its latent heat.
  • phase change material which is commonly used comprises sodium acetate tri-hydrate which will melt at 58 0 C into a solution of water and sodium acetate. It is characteristic of such a phase change material that it is able to super cool below the crystallisation temperature and then crystallise as a result of some event which causes nucleation which in turn will trigger crystallisation of the medium. This triggering can be caused by lowering the phase change material to its nucleation temperature which is in the region 253 0 K or by providing a nucleation site from which seed crystals will generate.
  • phase change material in heat packs which are heated by placing them in hot water and then are allowed to cool.
  • the heat packs will cool below the crystallisation temperature of the phase change material and usually a means is provided which will trigger nucleation in order that the medium will crystallise and release its heat.
  • Such heat packs can be used to selectively provide heat and have the advantage that they will not rise above the crystallisation temperature. While such an arrangement would seem to lend itself to larger scale situations such as providing heat for heating water and other like low temperature situations there have been problems in the past in putting the phase change material into use in such applications.. Disclosure of the Invention
  • the invention resides in a heat stores comprising a reservoir, the interior of the reservoir accommodating a first heat exchanger, said first heat exchanger having a first fluid path connected to a first inlet and first outlet located to the exterior of the reservoir, said first inlet and first outlet being intended in use to be connected to a further heat exchanger associated with a heat source, the reservoir being in thermal communication with a second heat exchanger having a second inlef and second outlet located to the exterior of the reservoir said second inlet being intended in use to be connected to a source of a supply liquid and the second outlet being intended in use to be connected to a delivery outlet, the interior of the reservoir accommodating a phase change material capable of changing phase between a liquid and a solid phase, the interior of the reservoir accommodating a nucleation activation means adapted to cause nucleation of the phase change material on the phase change material being at a temperature below its melting point.
  • the fluid pressure of the supply fluid in the second heat exchanger is in use to be greater than the fluid pressure within the reservoir.
  • the first heat exchanger comprises a convoluted fluid conduit having a set of closely spaced fins mounted to the exterior of the first fluid conduit.
  • the fluid path is of a serpentine nature comprising a plurality of interconnected lengths which are in closely spaced parallel relationship to each other and wherein the fins extend across the first heat exchanger between the lengths.
  • the nucleation activation means comprises an activation element having a portion located within the phase change medium which is capable of being cooled to the nucleation temperature of the phase change material.
  • the nucleation means comprises a flexible member defining a surface provided with small cracks or cavities or like deformations, said surface being adapted to be able to flex.
  • the nucleation means comprises a nucleation additive which is mixed with the phase change material.
  • the nucleation means comprises a treatment applied to the surface of the first and/or second heat exchanger which is to be in contact with the phase change material in a manner which will promote the formation of seed crystals.
  • the fins of the first and/or second heat exchanger at least are formed of an aluminium or aluminium alloy, the surface of which has been oxidised prior to location of the heat exchanger into the reservoir.
  • the invention resides in a heat battery comprising a plurality of heat stores of the form as described above in which the first heat exchangers are interconnected in series and/or parallel to each other and the battery has a third inlet and outlet which are intended in use to be connected to the heat source and wherein the second heat exchangers are interconnected in series, the battery having a fourth inlet and outlet which are connected to the source of supply fluid and the delivery outlet respectively.
  • Figure 1 is a part sectional view of a heat store which is utilised in the first embodiment
  • Figure 2 is a circuit diagram of a hot water system according to the first embodiment.
  • Figure 2 is a circuit diagram of a hot water system according to the second.
  • the embodiment is directed to a hot water system which uses as its heating means a number of heat stores 11 which are interconnected to provide a heat battery 51.
  • the heat battery is connected to a number of heat sources which comprise a solar collector 55, the condenser 57 of an air conditioning system and a heat pump 59.
  • Each heat store 11 (as shown at Figure 1 ) comprises a reservoir 13 which accommodates a phase change material which is able to change from a solid to a liquid phase on application of the appropriate amount of heat and which on cooling will change from a liquid to a solid phase to generate latent heat.
  • the phase change material comprises sodium acetate tri-hydrate which will melt at 58 0 C degrees to form an aqueous sodium acetate solution.
  • the reservoir 13 takes the form of a rectangular cube in which the longitudinal axis is generally upright such that one end face 15 is uppermost.
  • first heat exchanger 17 which comprises a convoluted conduit which defines a serpentine path comprising a plurality of interconnected lengths 19 which are in closely spaced parallel relationship to each other. Fins 21 extend across the first heat exchanger between the lengths 19. The lengths 19 are substantially upright.
  • the conduit carries a heat exchange fluid which is circulated through the heat exchanger in order to deliver heat into the reservoir.
  • the first heat exchanger 17 further comprises an inlet header 23, an outlet header 25 which are provided with an inlet conduit 27 and outlet conduit 29 respectively.
  • the inlet conduit 49 is associated with a first inlet 31 provided on the outer face of the one end 15 of the reservoir while the outlet conduit 29 is associated with a first outlet 33 located on the outer face of the one end of the reservoir.
  • the reservoir supports a second heat exchanger 35 from the inner face of the one end 15.
  • the second heat exchanger 35 comprises a substantially cubic enclosure which is mounted to the inner face of the one end to extend inwardly into the interior of the reservoir 13.
  • the second heat exchanger 35 comprises a plate heat exchanger (not shown).
  • the second heat exchanger has a second inlet 37 and a second outlet 39 whereby fluid entering the second heat exchanger 35 through the second inlet 37 will be caused to flow between the plates of the second heat exchanger to exit the second heat exchanger at the second outlet 39.
  • the interior of the reservoir 13 accommodates a phase change material in the form of a sodium acetate tri-hydrate which is in contact with the first heat exchanger 17 and he walls of the enclosure of the second heat exchanger 35.
  • the reservoir accommodates a nucleation trigger 41 which is capable of being activated to cause nucleation to cause the creation of seed crystals within the phase change material whereby on the phase change material being at a temperature below its crystallisation temperature the activation of the nucleation trigger 41 will cause crystallisation of the phase change material within the reservoir.
  • the nucleation trigger is sensitive to the temperature within the second reservoir 35 and is activated as a result of changes of temperature within the second heat exchanger 45 whereby on temperature being at a temperature above the temperature of crystallisation of the phase change material the nucleation trigger is not activated and on the temperature falling below the crystallisation temperature the nucleation trigger is activated
  • the heat battery of the first embodiment and as shown at Figure 2 comprises a number of heat stores 11 which are located in side by side relationship to define a heat battery 51 and are subdivided into two sets of heat stores 11.
  • the first inlets 31 and first outlets 33 of each heat store 11 in each set are connected in parallel and the sets are connected in series.
  • the second inlets 37 and second outlets 39 each heat store 11 are connected in series .
  • the battery 51 has a primary inlet 61 and a primary outlet 63 which are connected to a set of heat sources through a pump 53.
  • the heat sources comprise a heat exchanger 65 associated with a solar collector, a heat exchanger 67 associated with the condenser of an air conditioning system and a heat exchanger 69 associated with the condenser of a heat pump which may comprise a refrigerator or the like.
  • the fluid from each of the heat sources is caused to be circulated through the battery 51 and the respective heat sources by means of a pump 53.
  • the delivery of fluid from each of the heat sources to the inlet of the battery is controlled in accordance with the heat available from each source and the heat demands of the battery.
  • the second inlets and outlets of each of the heat stores 11 of the battery 51 are connected in to each other series and the battery has a water inlet 71 which is connected to a water supply whereby cold water enters the second inlet 37 of the first heat stores of the series and pass sequentially though each heat store to depart from a hot water outlet 39 of the final heat store of the battery to be delivered to a delivery outlet 73 of the battery 51.
  • heat is collected and stored in the battery from the various heat sources as a result of a heat exchange fluid being caused to circulate through the battery 52 under the influence of the pump 53.
  • the nucleation trigger of the heat store closest to the water inlet 61 will be activated to cause crystallisation of the phase change material and thus raise the temperature of the water passing through the respective second heat exchanger.
  • This action will be repeated sequentially in each of the subsequent heat stores through which the water passes until the temperature of the water has been raised to the crystallisation temperature of the phase change material. Once the temperature of the water has attained the crystallisation temperature of the phase change material it will continue to pass through the remaining heat store without triggering the phase change in those remaining heart stores.
  • the proportion of the battery which is caused to be activated or crystallised will be limited. The amount of heat being generated by the heat store will be dependent upon the amount of hot water being drawn from the battery.
  • a heat store is provided which is capable of extracting heat from a variety of heat sources such as solar collectors, air conditioning systems, heat pumps and the like and which can have a significant capacity and relatively rapid restoration capacity.
  • the heat battery will only generate heat as the need arises.
  • a second embodiment is illustrated at Figure 3.
  • the second heat exchanger 35 is located to the exterior of the reservoir and the heat exchanger is connected to the flow circuit provided between the heat sources and the first heat exchanger.
  • the second inlet 37 and outlet 39 of the second heat exchanger are connected to the water supply line such that the second heart exchanger is in parallel with the water supply.
  • the connection of the second outlet 39 into the water supply line is through a mixer valve 75 which enables the heated water from the second heat exchanger to be mixed with the cold water of the water supply line to deliver water from the delivery outlet at a desired temperature.
  • the flow circuit which accommodates the further heat exchanger 69 and the second heat exchanger 35 and is connected to the first heat exchanger 17 also includes a pump 53 to provide for a flow of the heat exchange medium through the respective heart exchangers.
  • the pump is activated when water is being delivered from the delivery outlet in order that secondary heat exchanger is provided with heat from the first heat exchanger and in order that the water flowing through the second heat exchanger is heated thereby.
  • the pump 53 when the battery is in a cooled condition at which it can accommodate more latent heat and when at least one of the heat sources is active enough to be able to deliver heat to the battery.
  • the further heat exchangers 65 and 69 are connected in parallel.
  • the heat battery 51 of the second embodiment and as shown at Figure 3 comprises a number of heat stores 11 are located in side by side relationship to define a heat battery 51.
  • the heart stores are divided into two sets of heat stores 11 and the first inlets 31 and first outlets 33 of the heat stores 11 in each set are connected in parallel and the sets are connected in series.
  • a third embodiment of the invention which is not illustrated comprises one which is similar to the first embodiment with the exception that the second heat exchanger of the heat store means 11 is located to the exterior of the heat store
  • the second heat exchange is in thermal communication with the reservoir through a flow circuit which includes a third heat exchange within the reservoir whereby fluid is circulated by means of a pump through the third heat exchanger to extract the heat therefrom.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Secondary Cells (AREA)

Abstract

A heat store (11) comprising a reservoir (13), the interior of the reservoir accommodating a first heat exchanger (17) in which the first heat exchanger have a first fluid path connected to a first inlet (31) and first outlet (33) located to the exterior of the reservoir, the first inlet and first outlet being intended in use to be connected to a further heat exchanger (65, 67, 69) associated with a heat source (55, 57, 59) the reservoir being in thermal communication with a second heat exchanger (35) having a second inlet (37) and second outlet (39). The second inlet being intended in use to be connected to a source of a supply liquid and the second outlet being intended in use to be connected to a delivery outlet, the interior of the reservoir accommodating a phase change material capable of changing phase between a liquid and a solid phase, the interior of the reservoir accommodating a nucleation activation means (41) adapted to cause nucleation of the phase change material on the phase change material being at a temperature below its melting point. A heat battery comprising a plurality of heat stores is also claimed

Description

"Heat Storage"
Field of the Invention
This invention relates to a heat store.
Background
The heat store according to the invention is one which utilises a phase change material which is capable of changing from a liquid to solid phase and in so able to release its latent heat. A known form of phase change material which is commonly used comprises sodium acetate tri-hydrate which will melt at 580C into a solution of water and sodium acetate. It is characteristic of such a phase change material that it is able to super cool below the crystallisation temperature and then crystallise as a result of some event which causes nucleation which in turn will trigger crystallisation of the medium. This triggering can be caused by lowering the phase change material to its nucleation temperature which is in the region 2530K or by providing a nucleation site from which seed crystals will generate. It has been known to use such phase change material in heat packs which are heated by placing them in hot water and then are allowed to cool. The heat packs will cool below the crystallisation temperature of the phase change material and usually a means is provided which will trigger nucleation in order that the medium will crystallise and release its heat. Such heat packs can be used to selectively provide heat and have the advantage that they will not rise above the crystallisation temperature. While such an arrangement would seem to lend itself to larger scale situations such as providing heat for heating water and other like low temperature situations there have been problems in the past in putting the phase change material into use in such applications.. Disclosure of the Invention
Throughout the specification and claims, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.
According to one aspect the invention resides in a heat stores comprising a reservoir, the interior of the reservoir accommodating a first heat exchanger, said first heat exchanger having a first fluid path connected to a first inlet and first outlet located to the exterior of the reservoir, said first inlet and first outlet being intended in use to be connected to a further heat exchanger associated with a heat source, the reservoir being in thermal communication with a second heat exchanger having a second inlef and second outlet located to the exterior of the reservoir said second inlet being intended in use to be connected to a source of a supply liquid and the second outlet being intended in use to be connected to a delivery outlet, the interior of the reservoir accommodating a phase change material capable of changing phase between a liquid and a solid phase, the interior of the reservoir accommodating a nucleation activation means adapted to cause nucleation of the phase change material on the phase change material being at a temperature below its melting point.
According to a preferred feature of the invention the fluid pressure of the supply fluid in the second heat exchanger is in use to be greater than the fluid pressure within the reservoir.
According to a preferred feature of the invention the first heat exchanger comprises a convoluted fluid conduit having a set of closely spaced fins mounted to the exterior of the first fluid conduit. According to one embodiment, the fluid path is of a serpentine nature comprising a plurality of interconnected lengths which are in closely spaced parallel relationship to each other and wherein the fins extend across the first heat exchanger between the lengths.
According to one embodiment the nucleation activation means comprises an activation element having a portion located within the phase change medium which is capable of being cooled to the nucleation temperature of the phase change material.
According to an alternative embodiment the nucleation means comprises a flexible member defining a surface provided with small cracks or cavities or like deformations, said surface being adapted to be able to flex.
According to another embodiment of the invention the nucleation means comprises a nucleation additive which is mixed with the phase change material.
According to another embodiment the nucleation means comprises a treatment applied to the surface of the first and/or second heat exchanger which is to be in contact with the phase change material in a manner which will promote the formation of seed crystals. According to a preferred feature of the embodiment the fins of the first and/or second heat exchanger at least are formed of an aluminium or aluminium alloy, the surface of which has been oxidised prior to location of the heat exchanger into the reservoir.
According to another aspect the invention resides in a heat battery comprising a plurality of heat stores of the form as described above in which the first heat exchangers are interconnected in series and/or parallel to each other and the battery has a third inlet and outlet which are intended in use to be connected to the heat source and wherein the second heat exchangers are interconnected in series, the battery having a fourth inlet and outlet which are connected to the source of supply fluid and the delivery outlet respectively. The invention will be more fully understood in the light of the following description of several specific embodiments.
Brief Description of the Drawings
The description is made with reference to the accompanying drawings of which:
Figure 1 is a part sectional view of a heat store which is utilised in the first embodiment;
Figure 2 is a circuit diagram of a hot water system according to the first embodiment; and
Figure 2 is a circuit diagram of a hot water system according to the second.
Detailed Description of Specific Embodiment
The embodiment is directed to a hot water system which uses as its heating means a number of heat stores 11 which are interconnected to provide a heat battery 51. As illustrated at Figure 2 the heat battery is connected to a number of heat sources which comprise a solar collector 55, the condenser 57 of an air conditioning system and a heat pump 59.
Each heat store 11 (as shown at Figure 1 ) comprises a reservoir 13 which accommodates a phase change material which is able to change from a solid to a liquid phase on application of the appropriate amount of heat and which on cooling will change from a liquid to a solid phase to generate latent heat. In the case of the first embodiment the phase change material comprises sodium acetate tri-hydrate which will melt at 580C degrees to form an aqueous sodium acetate solution. The reservoir 13 takes the form of a rectangular cube in which the longitudinal axis is generally upright such that one end face 15 is uppermost. In addition the interior of the reservoir accommodates a first heat exchanger 17 which comprises a convoluted conduit which defines a serpentine path comprising a plurality of interconnected lengths 19 which are in closely spaced parallel relationship to each other. Fins 21 extend across the first heat exchanger between the lengths 19. The lengths 19 are substantially upright. The conduit carries a heat exchange fluid which is circulated through the heat exchanger in order to deliver heat into the reservoir. The first heat exchanger 17 further comprises an inlet header 23, an outlet header 25 which are provided with an inlet conduit 27 and outlet conduit 29 respectively. The inlet conduit 49 is associated with a first inlet 31 provided on the outer face of the one end 15 of the reservoir while the outlet conduit 29 is associated with a first outlet 33 located on the outer face of the one end of the reservoir.
In addition the reservoir supports a second heat exchanger 35 from the inner face of the one end 15. The second heat exchanger 35 comprises a substantially cubic enclosure which is mounted to the inner face of the one end to extend inwardly into the interior of the reservoir 13. The second heat exchanger 35 comprises a plate heat exchanger (not shown). The second heat exchanger has a second inlet 37 and a second outlet 39 whereby fluid entering the second heat exchanger 35 through the second inlet 37 will be caused to flow between the plates of the second heat exchanger to exit the second heat exchanger at the second outlet 39.
The interior of the reservoir 13 accommodates a phase change material in the form of a sodium acetate tri-hydrate which is in contact with the first heat exchanger 17 and he walls of the enclosure of the second heat exchanger 35. In addition the reservoir accommodates a nucleation trigger 41 which is capable of being activated to cause nucleation to cause the creation of seed crystals within the phase change material whereby on the phase change material being at a temperature below its crystallisation temperature the activation of the nucleation trigger 41 will cause crystallisation of the phase change material within the reservoir. The nucleation trigger is sensitive to the temperature within the second reservoir 35 and is activated as a result of changes of temperature within the second heat exchanger 45 whereby on temperature being at a temperature above the temperature of crystallisation of the phase change material the nucleation trigger is not activated and on the temperature falling below the crystallisation temperature the nucleation trigger is activated
The heat battery of the first embodiment and as shown at Figure 2, comprises a number of heat stores 11 which are located in side by side relationship to define a heat battery 51 and are subdivided into two sets of heat stores 11. The first inlets 31 and first outlets 33 of each heat store 11 in each set are connected in parallel and the sets are connected in series. The second inlets 37 and second outlets 39 each heat store 11 are connected in series . The battery 51 has a primary inlet 61 and a primary outlet 63 which are connected to a set of heat sources through a pump 53. The heat sources comprise a heat exchanger 65 associated with a solar collector, a heat exchanger 67 associated with the condenser of an air conditioning system and a heat exchanger 69 associated with the condenser of a heat pump which may comprise a refrigerator or the like.
The fluid from each of the heat sources is caused to be circulated through the battery 51 and the respective heat sources by means of a pump 53. In addition the delivery of fluid from each of the heat sources to the inlet of the battery is controlled in accordance with the heat available from each source and the heat demands of the battery. The second inlets and outlets of each of the heat stores 11 of the battery 51 are connected in to each other series and the battery has a water inlet 71 which is connected to a water supply whereby cold water enters the second inlet 37 of the first heat stores of the series and pass sequentially though each heat store to depart from a hot water outlet 39 of the final heat store of the battery to be delivered to a delivery outlet 73 of the battery 51..
In operation heat is collected and stored in the battery from the various heat sources as a result of a heat exchange fluid being caused to circulate through the battery 52 under the influence of the pump 53. On a flow of cold water into the heat battery 51 the nucleation trigger of the heat store closest to the water inlet 61 will be activated to cause crystallisation of the phase change material and thus raise the temperature of the water passing through the respective second heat exchanger. This action will be repeated sequentially in each of the subsequent heat stores through which the water passes until the temperature of the water has been raised to the crystallisation temperature of the phase change material. Once the temperature of the water has attained the crystallisation temperature of the phase change material it will continue to pass through the remaining heat store without triggering the phase change in those remaining heart stores. On there being only being a small draw of hot water from the battery 51 , the proportion of the battery which is caused to be activated or crystallised will be limited. The amount of heat being generated by the heat store will be dependent upon the amount of hot water being drawn from the battery.
As a result of the embodiment a heat store is provided which is capable of extracting heat from a variety of heat sources such as solar collectors, air conditioning systems, heat pumps and the like and which can have a significant capacity and relatively rapid restoration capacity. In addition the heat battery will only generate heat as the need arises.
A second embodiment is illustrated at Figure 3. In the case of the second embodiment the second heat exchanger 35 is located to the exterior of the reservoir and the heat exchanger is connected to the flow circuit provided between the heat sources and the first heat exchanger. The second inlet 37 and outlet 39 of the second heat exchanger are connected to the water supply line such that the second heart exchanger is in parallel with the water supply. The connection of the second outlet 39 into the water supply line is through a mixer valve 75 which enables the heated water from the second heat exchanger to be mixed with the cold water of the water supply line to deliver water from the delivery outlet at a desired temperature.
The flow circuit which accommodates the further heat exchanger 69 and the second heat exchanger 35 and is connected to the first heat exchanger 17 also includes a pump 53 to provide for a flow of the heat exchange medium through the respective heart exchangers. The pump is activated when water is being delivered from the delivery outlet in order that secondary heat exchanger is provided with heat from the first heat exchanger and in order that the water flowing through the second heat exchanger is heated thereby. The pump 53 when the battery is in a cooled condition at which it can accommodate more latent heat and when at least one of the heat sources is active enough to be able to deliver heat to the battery.
The second embodiment as shown in the drawings as having only two further heat exchangers 65 and 69 which is associated with a solar collector 55 and the condenser of a heat pump 59 respectively. It should be appreciated that this is for illustration purposes only and that any number of further heat exchangers can be provided as in the case of the first embodiment. The further heat exchangers 65 and 69 are connected in parallel.
As in the case of the first embodiment the heat battery 51 of the second embodiment and as shown at Figure 3 comprises a number of heat stores 11 are located in side by side relationship to define a heat battery 51. The heart stores are divided into two sets of heat stores 11 and the first inlets 31 and first outlets 33 of the heat stores 11 in each set are connected in parallel and the sets are connected in series.
A third embodiment of the invention which is not illustrated comprises one which is similar to the first embodiment with the exception that the second heat exchanger of the heat store means 11 is located to the exterior of the heat store
11. In the third embodiment the second heat exchange is in thermal communication with the reservoir through a flow circuit which includes a third heat exchange within the reservoir whereby fluid is circulated by means of a pump through the third heat exchanger to extract the heat therefrom.
The present invention is not to be limited in scope by the specific embodiment described herein. The embodiment is intended for the purpose of exemplification only. Functionally equivalent products, formulations and methods are clearly within the scope of the invention as described herein.

Claims

ClaimsThe Claims Defining the Invention is as Follows:
1. A heat store comprising a reservoir, the interior of the reservoir accommodating a first heat exchanger, said first heat exchanger having a first fluid path connected to a first inlet and first outlet located to the exterior of the reservoir, said first inlet and first outlet being intended in use to be connected to a further heat exchanger associated with a heat source, the reservoir being in thermal communication with a second heat exchanger having a second inlet and second outlet said second inlet being intended in use to be connected to a source of a supply liquid and the second outlet being intended in use to be connected to a delivery outlet, the interior of the reservoir accommodating a phase change material capable of changing phase between a liquid and a solid phase, the interior of the reservoir accommodating a nucleation activation means adapted to cause nucleation of the phase change material on the phase change material being at a temperature below its melting point.
2. A heat store as claimed at claim 1 wherein the second heat exchanger is accommodated within an enclosure supported within the reservoir having walls which are in heat exchange relationship with the phase change material.
3. A heat store as claimed at claim 1 wherein the second heat exchanger is located to the exterior of the reservoir and is connected to a flow circuit which provides the thermal communication with the reservoir.
4. A heat store as claimed at claim 3 wherein the flow circuit includes a third heat exchanger within the reservoir.
5. A heat store as claimed at claim 3 wherein the flow circuit incorporates the first inlet and the outlet and includes a pump which is arranged to induce a fluid flow though the second and further heat exchanger.
6. A heat store as claimed at any one of the preceding claims wherein the fluid pressure of the supply fluid in the second heat exchanger is in use to be greater than the fluid pressure within the reservoir.
7. A heat store as claimed at any one of the preceding claims wherein the first heat exchanger comprises a convoluted fluid conduit having a set of closely spaced fins mounted to the exterior of the first fluid conduit.
8. A heat store as claimed at claim 3 wherein the fluid path is of a serpentine nature comprising a plurality of interconnected lengths which are in closely spaced parallel relationship to each other and wherein the fins extend across the first heat exchanger between the lengths.
9. A heat store as claimed at any one of the preceding claims wherein nucleation activation means comprises an activation element having a portion located within the phase change medium which is capable of being cooled to the nucleation temperature of the phase change material.
10.A heat store as claimed at any one of claims 1 to 9 wherein the nucleation means comprises a flexible member defining a surface provided with small cracks or cavities or like deformations, said surface being adapted to be able to flex.
11.A heat store as claimed at any one of claims 1 to 8 wherein the nucleation means comprises a nucleation additive which is mixed with the phase change material.
12.A heat store as claimed at any one of claims 1 to 8 wherein the nucleation means comprises a treatment applied to the surface of the first heat exchanger which is to be in contact with the phase change material in a manner which will promote the formation of seed crystals.
13.A heat store as claimed at any one of claims 1 to 8 wherein the fins of the first heat exchanger at least are formed of an aluminium or aluminium alloy, the surface of which has been oxidised prior to location of the heat exchanger into the reservoir.
14.A heat store substantially as herein described.
15.A heat battery comprising a plurality of heat stores, each of the heat stores comprising a reservoir, the interior of the reservoir accommodating a first heat exchanger, said first heat exchanger having a first fluid path connected to a first inlet and first outlet located to the exterior of the reservoir, said first inlet and first outlet being intended in use to be connected to a further heat exchanger associated with a heat source, the reservoir being in thermal communication with a second heat exchanger having a second inlet and second outlet said second inlet being intended in use to be connected to a source of a supply liquid and the second outlet being intended in use to be connected to a delivery outlet, the interior of the reservoir accommodating a phase change material capable of changing phase between a liquid and a solid phase, the interior of the reservoir accommodating a nucleation activation means adapted to cause nucleation of the phase change material on the phase change material being at a temperature below its melting point wherein the first heat exchangers are interconnected in series and/or parallel to each other and the battery has a third inlet and outlet which are intended in use to be connected to the heat source and wherein the second heat exchangers are interconnected in series, the battery having a fourth inlet and outlet which are connected to the source of supply fluid and the delivery outlet respectively.
16.A heat battery as claimed at claim 15 wherein the second heat exchanger is accommodated within an enclosure supported within the reservoir having walls which are in heat exchange relationship with the phase change material.
17.A heat battery comprising a plurality of heat stores, each of the heat stores comprising a reservoir, the interior of the reservoir accommodating a first heat exchanger, said first heat exchanger having a first fluid path connected to a first inlet and first outlet located to the exterior of the reservoir, said first inlet and first outlet being intended in use to be connected to a further heat exchanger associated with a heat source, the reservoir being in thermal communication with a second heat exchanger having a second inlet and second outlet said second inlet being intended in use to be connected to a source of a supply liquid and the second outlet being intended in use to be connected to a delivery outlet, the interior of the reservoir accommodating a phase change material capable of changing phase between a liquid and a solid phase, the interior of the reservoir accommodating a nucleation activation means adapted to cause nucleation of the phase change material on the phase change material being at a temperature below its melting point wherein the first heat exchangers are interconnected in series and/or parallel to each other and the battery has a third inlet and outlet which are intended in use to be connected to the heat source and wherein the second heat exchangers are interconnected in series, the battery having a fourth inlet and outlet which are connected to the source of supply fluid and the delivery outlet respectively.
18.A heat battery as claimed at claim 17 wherein the second heat exchanger is located to the exterior of the reservoir and is connected to a flow circuit which provides the thermal communication with the reservoir.
19.A heat battery as claimed at claim 18 wherein the flow circuit includes a third heat exchanger within the reservoir.
20.A heat battery store as claimed at claim 18 wherein the flow circuit incorporates the first inlet and the outlet and includes a pump which is arranged to induce a fluid flow though the second and further heat exchanger.
21. A heat battery as claimed at any one of 15 to 21 wherein the fluid pressure of the supply fluid in the second heat exchanger is in use to be greater than the fluid pressure within the reservoir.
22. A heat battery substantially as herein described with reference to the accompanying drawings
PCT/AU2008/001730 2007-11-23 2008-11-21 Heat storage WO2009065182A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2007906431 2007-11-23
AU2007906431A AU2007906431A0 (en) 2007-11-23 Heat Storage

Publications (1)

Publication Number Publication Date
WO2009065182A1 true WO2009065182A1 (en) 2009-05-28

Family

ID=40667058

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2008/001730 WO2009065182A1 (en) 2007-11-23 2008-11-21 Heat storage

Country Status (1)

Country Link
WO (1) WO2009065182A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2458299A3 (en) * 2010-11-24 2012-08-15 Zenex Technologies Limited A heater
AT12877U1 (en) * 2009-07-20 2013-01-15 Michael Plasch SYSTEM FOR SAVING AND REUSE OF HEAT
WO2012021111A3 (en) * 2010-08-10 2013-11-14 Fkkp, S.R.O. Tempering system
FR2995668A1 (en) * 2012-09-18 2014-03-21 Electricite De France Heat pump installation for use in e.g. thermodynamic water-heater in dwelling house, has evaporator arranged upstream of container, where fluid is directed to evaporator for removing calories during circulation of fluid in circulation path
CN105757982A (en) * 2016-04-27 2016-07-13 江苏启能新能源材料有限公司 Composite phase-change heat storage device
CN106958854A (en) * 2016-01-12 2017-07-18 熊建湘 A kind of hot water supply system of intelligent expansible heater
FR3072765A1 (en) * 2017-10-24 2019-04-26 Commissariat A L'energie Atomique Et Aux Energies Alternatives DEVICE FOR HEATING A CIRCULATING FLUID IN A PIPING AND THERMAL INSTALLATION COMPRISING SUCH A DEVICE
CN110770524A (en) * 2017-06-01 2020-02-07 松耐普有限公司 Active crystallization control in phase change material thermal storage systems
CN110984424A (en) * 2019-12-13 2020-04-10 信阳师范学院 Be used for building outer wall heat preservation energy-conservation and arrange watertight fittings
CN111412515A (en) * 2019-10-23 2020-07-14 河北耀伏储能电器有限公司 Integrated intelligent household electric phase-change heat storage heating system and method
CN112594769A (en) * 2020-12-24 2021-04-02 三峡大学 Multi-energy supply device and method based on aluminum micro-channel heat pipe technology

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258696A (en) * 1978-04-05 1981-03-31 Johnson Controls, Inc. Passive thermal energy phase change storage apparatus
GB2237629A (en) * 1989-10-27 1991-05-08 Clulow Malcom George Thermal storage medium
US6400896B1 (en) * 1999-07-02 2002-06-04 Trexco, Llc Phase change material heat exchanger with heat energy transfer elements extending through the phase change material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258696A (en) * 1978-04-05 1981-03-31 Johnson Controls, Inc. Passive thermal energy phase change storage apparatus
GB2237629A (en) * 1989-10-27 1991-05-08 Clulow Malcom George Thermal storage medium
US6400896B1 (en) * 1999-07-02 2002-06-04 Trexco, Llc Phase change material heat exchanger with heat energy transfer elements extending through the phase change material

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PERRY ET AL.: "'PERRY'S CHEMICAL ENGINEER'S HANDBOOK'" *
PERRY ET AL.: "'PERRY'S CHEMICAL ENGINEER'S HANDBOOK", MCGRAW-HILL BOOK COMPANY *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT12877U1 (en) * 2009-07-20 2013-01-15 Michael Plasch SYSTEM FOR SAVING AND REUSE OF HEAT
WO2012021111A3 (en) * 2010-08-10 2013-11-14 Fkkp, S.R.O. Tempering system
EP2458299A3 (en) * 2010-11-24 2012-08-15 Zenex Technologies Limited A heater
FR2995668A1 (en) * 2012-09-18 2014-03-21 Electricite De France Heat pump installation for use in e.g. thermodynamic water-heater in dwelling house, has evaporator arranged upstream of container, where fluid is directed to evaporator for removing calories during circulation of fluid in circulation path
CN106958854A (en) * 2016-01-12 2017-07-18 熊建湘 A kind of hot water supply system of intelligent expansible heater
CN105757982A (en) * 2016-04-27 2016-07-13 江苏启能新能源材料有限公司 Composite phase-change heat storage device
CN110770524A (en) * 2017-06-01 2020-02-07 松耐普有限公司 Active crystallization control in phase change material thermal storage systems
CN110770524B (en) * 2017-06-01 2023-12-12 松耐普有限公司 Active crystallization control in phase change material thermal storage systems
EP3477211A1 (en) * 2017-10-24 2019-05-01 Commissariat à l'Energie Atomique et aux Energies Alternatives Device for heating a fluid flowing in a pipe and thermal installation comprising such a device
FR3072765A1 (en) * 2017-10-24 2019-04-26 Commissariat A L'energie Atomique Et Aux Energies Alternatives DEVICE FOR HEATING A CIRCULATING FLUID IN A PIPING AND THERMAL INSTALLATION COMPRISING SUCH A DEVICE
CN111412515A (en) * 2019-10-23 2020-07-14 河北耀伏储能电器有限公司 Integrated intelligent household electric phase-change heat storage heating system and method
CN111412515B (en) * 2019-10-23 2021-08-10 河北耀伏储能电器有限公司 Integrated intelligent household electric phase-change heat storage heating system and method
CN110984424A (en) * 2019-12-13 2020-04-10 信阳师范学院 Be used for building outer wall heat preservation energy-conservation and arrange watertight fittings
CN110984424B (en) * 2019-12-13 2021-04-30 信阳师范学院 Be used for building outer wall heat preservation energy-conservation and arrange watertight fittings
CN112594769A (en) * 2020-12-24 2021-04-02 三峡大学 Multi-energy supply device and method based on aluminum micro-channel heat pipe technology
CN112594769B (en) * 2020-12-24 2022-01-04 三峡大学 Multi-energy supply device and method based on aluminum micro-channel heat pipe technology

Similar Documents

Publication Publication Date Title
WO2009065182A1 (en) Heat storage
JP5204220B2 (en) COOLING SYSTEM AND METHOD USING THERMAL CAPACITOR UNIT
SE534695C2 (en) Accumulator
US20100287933A1 (en) Thermal energy storage apparatus
EP3732420A1 (en) Storage integrated heat exchanger
JP2010223537A (en) Heat pump hot water supply system
KR20090122157A (en) Air source heat exchange system and method utilizing temperature gradient and water
CN105783549A (en) Heat exchanger for a rankine cycle in a vehicle
JP5200461B2 (en) Steam generation system
WO2006137269A1 (en) Sterling cooling chamber
JP4626239B2 (en) Heat pump heat storage device
GB2467812A (en) Fluid conditioning arrangement
EP0042434B1 (en) Method of amplifying heat
SE523716C2 (en) Air conditioning
JP5169157B2 (en) Hot water system
JPH01263491A (en) Heat exchanger using heat pipe
JP5029039B2 (en) Hot water system
RU2154781C1 (en) Thermoelectric refrigerator
JPS5821195B2 (en) Open type sprinkler type evaporator
JP3516314B2 (en) Ice heat storage device using supercooled water
JP2000055520A (en) Liquefied natural gas cold using vaporizer
JP2004085008A (en) Hydrate slurry manufacturing system and its operation method
JP4427971B2 (en) Ice heat storage method
JP4767207B2 (en) Water heater
CN210088978U (en) Low-temperature workshop temperature control system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08852537

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08852537

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 08852537

Country of ref document: EP

Kind code of ref document: A1