CN113091330A - Phase change heat storage device based on solar energy - Google Patents
Phase change heat storage device based on solar energy Download PDFInfo
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- CN113091330A CN113091330A CN202110401569.9A CN202110401569A CN113091330A CN 113091330 A CN113091330 A CN 113091330A CN 202110401569 A CN202110401569 A CN 202110401569A CN 113091330 A CN113091330 A CN 113091330A
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/10—Arrangements for storing heat collected by solar heat collectors using latent heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/60—Thermal insulation
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- 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
The application relates to the technical field of heat storage equipment, in particular to a phase change heat storage device based on solar energy, which comprises a solar vacuum heat collector, a heat storage water tank, a phase change heat reservoir, a three-way switching valve A and a three-way switching valve B; the solar vacuum heat collector is provided with a first water inlet pipe; the solar vacuum heat collector is connected with the heat storage water tank through a first connecting pipe; a first outlet of the three-way switching valve A is connected with a first port of the phase change heat reservoir, a second outlet of the three-way switching valve A is connected with the heat storage water tank through a second connecting pipe, and a third outlet of the three-way switching valve A is connected with the heat storage water tank through a fourth connecting pipe; a first outlet of the three-way switching valve B is connected with a second outlet of the phase change heat reservoir, a second outlet of the three-way switching valve B is connected with the outside through a second water inlet pipe, and a third outlet of the three-way switching valve B is connected with the first water inlet pipe through a third connecting pipe. The application solves the technical problem of low solar energy conversion and utilization efficiency in the prior art.
Description
Technical Field
The application relates to the technical field of heat storage equipment, in particular to a phase change heat storage device based on solar energy.
Background
Energy is an important material basis for the survival and development of human society and is vital to the competition of national civilian life and national strategy. China has abundant solar energy resources, can fully utilize the energy conversion of solar energy, and promotes the sustainable development of clean energy. However, most of heat storage devices related to solar photo-thermal conversion carry out primary heat storage only through a water storage tank, and generally have the defects of small heat storage quantity, low heat exchange rate, intermittent operation, poor stability and the like. Therefore, how to effectively utilize the energy of solar photo-thermal conversion in multiple stages becomes a problem which needs to be solved urgently.
Disclosure of Invention
In view of this, an object of the present application is to provide a phase change heat storage device based on solar energy, which effectively solves the technical problem in the prior art that the solar energy conversion and utilization efficiency is low.
In order to achieve the purpose, the application provides the following technical scheme:
a phase change heat storage device based on solar energy comprises a solar vacuum heat collector, a heat storage water tank, a phase change heat reservoir, a three-way switching valve A and a three-way switching valve B;
the solar vacuum heat collector is provided with a first water inlet pipe, and the heat storage water tank is provided with a first water outlet pipe;
the solar vacuum heat collector is connected with the heat storage water tank through a first connecting pipe;
a first outlet of the three-way switching valve A is connected with a first port of the phase change heat reservoir, a second outlet of the three-way switching valve A is connected with the heat storage water tank through a second connecting pipe, and a third outlet of the three-way switching valve A is connected with the heat storage water tank through a fourth connecting pipe;
the first outlet of the three-way switching valve B is connected with the second port of the phase change heat reservoir, the second outlet of the three-way switching valve B is connected with the outside through a second water inlet pipe, and the third outlet of the three-way switching valve B is connected with the first water inlet pipe through a third connecting pipe.
Preferably, in the phase change heat storage device, the phase change liquid storage device includes a sealed housing, a phase change material unit and a heat conductive silica gel plate;
the phase change material unit with the heat conduction silica gel board all set up in the inside of sealed housing, just the phase change material unit inlay in the inside of heat conduction silica gel board.
Preferably, in the phase change heat storage device, the phase change material unit is cylindrical, and the surface of the phase change material unit is in contact fit with the inner wall of the heat conducting silica gel plate.
Preferably, in the phase change heat storage device, the heat conductive silica gel plate is provided with a plurality of through holes; the through hole on the first side of the heat-conducting silica gel plate is connected with the first port of the phase change heat reservoir through a pipeline; and the through hole on the second side of the heat-conducting silica gel plate is connected with the second port of the phase change heat reservoir through a pipeline.
Preferably, in the phase change heat storage device, a U-shaped pipe is connected between two adjacent through holes, so that the pipeline on the heat-conducting silica gel plate forms an S-shaped pipeline.
Preferably, in the phase change heat storage device, the sealed housing is filled with a thermal insulation material.
Preferably, in the phase change heat storage device, the first water inlet pipe, the second water inlet pipe, the first connecting pipe, the second connecting pipe, the third connecting pipe, the fourth connecting pipe, and the first water outlet pipe are all provided with electromagnetic valves.
Preferably, in the phase change heat storage device, the first water inlet pipe, the second water inlet pipe and the first water outlet pipe are all provided with a filter.
Preferably, in the phase change heat storage device, a thermometer and a flowmeter are disposed on each of the first connection pipe, the second connection pipe, and the fourth connection pipe.
Preferably, in the phase change heat storage device, the phase change heat storage device further includes a solar panel and a power supply system, and the solar panel is connected to the power supply system and is used for providing electric energy for the power supply system.
Compared with the prior art, the beneficial effects of this application are:
the application provides a phase transition heat-retaining device based on solar energy, during the operation in the daytime, the hot water that solar energy vacuum heat collector heated can be stored to the heat storage water tank, then can carry out the heat exchange with the hot water of heat storage water tank to the phase transition heat reservoir and realize the heat and store, and can also mix the cold water of the low temperature hot water that the phase transition heat reservoir flows and first inlet tube, thereby improve the cold water initial temperature of solar energy vacuum heat collector, further improve solar energy vacuum heat collector's light and heat conversion efficiency, the technical problem that has solar energy conversion utilization efficiency to hang down among the prior art has been solved effectively. During night work, on the one hand, the heat storage water tank can directly provide hot water for the user, and on the other hand can also heat cold water through phase change heat reservoir release heat to carry to the heat storage water tank, thereby guarantee to continuously provide sufficient life hot water for the user at night in order to satisfy the heat demand of user night.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a phase change heat storage device based on solar energy according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a phase change heat storage device of a phase change heat storage apparatus based on solar energy according to an embodiment of the present disclosure;
fig. 3 is a schematic connection diagram of a phase change material unit and a heat conduction silica gel plate of a phase change heat storage device based on solar energy according to an embodiment of the present application.
In the figure:
1 is a sealed shell, 2 is a straight-through pipe, 3 is a U-shaped pipe, 4 is an aerogel heat preservation felt, 5 is a phase change material unit, 6 is a heat conduction silica gel plate, 7 is a solar vacuum heat collector, 8 is a heat storage water tank, 9 is a solar panel, 10 is a first water inlet pipe, 11 is a first connecting pipe, 12 is a second connecting pipe, 13 is a third connecting pipe, 14 is a fourth connecting pipe, 15 is a second water inlet pipe, 16 is a first water outlet pipe, 17 is a first electromagnetic valve, reference numeral 18 denotes a second electromagnetic valve, 19 denotes a third electromagnetic valve, 20 denotes a fourth electromagnetic valve, 21 denotes a fifth electromagnetic valve, 22 denotes a sixth electromagnetic valve, 23 denotes a first filter, 24 denotes a second filter, 25 denotes a third filter, 26 denotes a first thermometer, 27 denotes a second thermometer, 28 denotes a third thermometer, 29 denotes a first flowmeter, 30 denotes a second flowmeter, 31 denotes a third flowmeter, 32 denotes a three-way switching valve a, and 33 denotes a three-way switching valve B.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
Energy is an important material basis for the survival and development of human society and is vital to the competition of national civilian life and national strategy. China has abundant solar energy resources, can fully utilize the energy conversion of solar energy, and promotes the sustainable development of clean energy. However, most of heat storage devices related to solar photo-thermal conversion carry out primary heat storage only through a water storage tank, and generally have the defects of small heat storage quantity, low heat exchange rate, intermittent operation, poor stability and the like. Therefore, how to effectively utilize the energy of solar photo-thermal conversion in multiple stages becomes a problem which needs to be solved urgently.
Referring to fig. 1 to 3, an embodiment of the present application provides a phase change heat storage device based on solar energy, including a solar vacuum heat collector 7, a heat storage water tank 8, a phase change heat storage, a three-way switching valve a32, and a three-way switching valve B33; the solar vacuum heat collector 7 is provided with a first water inlet pipe 10, and the heat storage water tank 8 is provided with a first water outlet pipe 16; the solar vacuum heat collector 7 is connected with the heat storage water tank 8 through a first connecting pipe 11; a first outlet of the three-way switching valve a32 is connected with a first port of the phase change heat reservoir, a second outlet of the three-way switching valve a32 is connected with the heat storage water tank 8 through a second connecting pipe 12, and a third outlet of the three-way switching valve a32 is connected with the heat storage water tank 8 through a fourth connecting pipe 14; a first outlet of the three-way switching valve B33 is connected to a second outlet of the phase change heat reservoir, a second outlet of the three-way switching valve B33 is connected to the outside through a second water inlet pipe 15, and a third outlet of the three-way switching valve B33 is connected to the first water inlet pipe 10 through a third connecting pipe 13.
More specifically, the three-way switching valve a32 functions to switch between the second connection pipe 12 and the fourth connection pipe 14 so that the first port of the phase-change reservoir selectively communicates with the second connection pipe 12 or the fourth connection pipe 14; the three-way switching valve B33 is used to switch between the second inlet tube 15 and the third connecting tube 13 so that the second opening of the phase change reservoir is selectively communicated with the second inlet tube 15 or the third connecting tube 13.
The effective effect of this embodiment: (1) during the operation in the daytime, hot water that solar energy vacuum heat collector 7 was heated can be stored to heat storage water tank 8, then can carry the hot water of heat storage water tank 8 to the phase change heat reservoir and carry out the heat exchange and realize the heat and store, and can also mix the low temperature hot water that the phase change heat reservoir flows with the cold water of first inlet tube 10, thereby improve the cold water initial temperature of solar energy vacuum heat collector 7, further improve the light and heat conversion efficiency of solar energy vacuum heat collector 7, the technical problem that has solar energy conversion utilization efficiency low among the prior art has been solved effectively. During operation at night, on the one hand, heat storage water tank 8 can directly provide hot water for the user, and on the other hand can also heat cold water through phase change heat reservoir release heat to carry to heat storage water tank 8, thereby guarantee to last to provide sufficient life hot water for the user at night in order to satisfy the heat demand at user night. (2) The whole phase-change heat storage device fully utilizes the characteristic that the solar vacuum heat collecting tube can effectively absorb solar radiation and convert the solar radiation into heat energy, and the phase-change material can store heat, thereby solving the problems of space-time asymmetry of solar radiation and unstable energy conversion. The phase change heat reservoir is used as a secondary heat storage device, a composite phase change material with excellent heat conduction performance and high heat storage density is selected as a heat storage unit, and heat exchange is carried out by utilizing phase change latent heat through water flowing through a coiled pipe in the heat conduction silica gel plate 6 in uniform distribution, so that the multistage storage and release of heat are realized, the energy utilization rate is further improved, and the working load of the solar heat collector is reduced.
Further, in the present embodiment, the phase change liquid reservoir includes a sealed case 1, a phase change material unit 5, and a heat conductive silicone plate 6; phase change material unit 5 and heat conduction silica gel plate 6 all set up in the inside of sealed housing 1, and phase change material unit 5 inlays in the inside of heat conduction silica gel plate 6. The phase change material unit 5 can perform conjugate heat transfer with hot water from the solar vacuum heat collector 7, and the heat in the hot water is stored in the phase change material through latent heat storage, so that the effective multi-stage utilization of solar energy is realized; and the heat-conducting silica gel plate 6 is used as a medium for heat exchange of the phase-change material unit 5, so that the heat exchange rate of hot water in the pipe and the phase-change material unit 5 is further improved.
More specifically, sealed casing 1 is sealed cavity all around, and sealed casing 1 can be by 4 aluminum plates or 6 aluminum plates group, and the aluminum plate junction has the buckle, makes things convenient for equipment dismantlement and maintenance in the future on the basis of reinforcing casing compactness.
Further, in the present embodiment, referring to fig. 3, the phase change material unit 5 is cylindrical, and the surface of the phase change material unit 5 is in contact with the inner wall of the heat conductive silicone rubber plate 6. The heat-conducting silica gel plate 6 is connected with the phase change material unit 5 in a nested manner by utilizing the curved surface with the circular arc, so that the contact area between the heat-conducting silica gel plate 6 and the phase change material unit 5 can be increased, and the heat exchange efficiency is improved.
Further, in the present embodiment, referring to fig. 2, a plurality of through holes are formed on the heat-conducting silicone plate 6; the through hole on the first side of the heat-conducting silica gel plate 6 is connected with the first port of the phase change heat reservoir through a pipeline; the through hole on the second side of the heat-conducting silica gel plate 6 is connected with the second port of the phase change heat reservoir through a pipeline. The pipeline includes through pipe 2, and through pipe 2 can pass in the round hole of reserving on the heat conduction silica gel board 6, and the first opening of phase change reservoir specifically is the pipeline that each through pipe 2 of first side converged and forms and is to the interface, and the second opening of phase change reservoir specifically is the pipeline that each through pipe 2 of second side converged and forms and is to the interface.
Further, in the present embodiment, referring to fig. 2, a U-shaped pipe 3 is connected between two adjacent through holes, so that the pipeline on the heat-conducting silica gel plate 6 forms an S-shaped pipeline. The U-shaped pipe 3 is connected with other straight-through pipes 2 in the same group, and a snake-shaped pipeline formed by the straight-through pipes 2 and the U-shaped pipe 3 can prolong a hot water circulation path and achieve the purpose of improving the heat exchange rate of hot water and phase change materials.
Further, in the present embodiment, please refer to fig. 2 and fig. 3, the interior of the sealed housing 1 is filled with a thermal insulation material. The insulation material specifically is aerogel heat preservation felt 4, and aerogel heat preservation felt 4 is used for filling the space between sealed casing 1, phase change material unit 5, the 6 three of heat conduction silica gel board respectively, reduces heat-conduction and promotes the heat-retaining efficiency of phase change heat reservoir, and heat conduction silica gel board 6 and phase change material unit 5 all do not all contact with sealed casing 1 inner wall.
More specifically, referring to fig. 2 and 3, when there are three groups of phase change material units 5, each group is composed of three cylindrical solid phase change material monomers, and the aerogel insulation blanket 4 is filled around the three groups; the copper pipes are divided into three groups, and each group comprises three straight pipes and two specially-made U-shaped pipes 3. Each group of copper pipes is connected with three straight pipes and two specially-made U-shaped pipes 3 in a series connection mode to form a serpentine coil pipe, so that a hot water circulation path can be prolonged, and the heat exchange rate of hot water and the phase change material unit 5 is further improved.
Further, in the present embodiment, referring to fig. 1, the first water inlet pipe 10, the second water inlet pipe 15, the first connecting pipe 11, the second connecting pipe 12, the third connecting pipe 13, the fourth connecting pipe 14 and the first water outlet pipe 16 are all provided with electromagnetic valves. Through the arrangement of the electromagnetic valve, workers can select each pipeline to close or access according to actual needs, so that the requirements of each workplace are met.
More specifically, referring to fig. 1, a first electromagnetic valve 17 is disposed on the first water inlet pipe 10, a second electromagnetic valve 18 is disposed on the first connecting pipe 11, a third electromagnetic valve 19 is disposed on the second connecting pipe 12, a fourth electromagnetic valve 20 is disposed on the fourth connecting pipe 14, a fifth electromagnetic valve 21 is disposed on the first water outlet pipe 16, and a sixth electromagnetic valve 22 is disposed on the second water inlet pipe 15.
Further, in the present embodiment, referring to fig. 1, the first water inlet pipe 10, the second water inlet pipe 15 and the first water outlet pipe 16 are all provided with a filter. The first water inlet pipe 10 is provided with a first filter 23 for filtering cold water entering the solar vacuum heat collector 7 so as to reduce the influence of impurities on the normal operation of the solar vacuum heat collector 7; the first water outlet pipe 16 is provided with a second filter 24 for filtering hot water discharged from the hot water storage tank 8, so as to reduce impurities and ensure that a user uses hot water with higher quality; the second water inlet pipe 15 is provided with a third filter 25 for filtering cold water entering the phase change heat reservoir, so as to reduce the influence of impurities on the normal operation of the phase change heat reservoir.
Further, in the present embodiment, referring to fig. 1, a thermometer and a flowmeter are disposed on the first connecting pipe 11, the second connecting pipe 12 and the fourth connecting pipe 14. A first thermometer 26 and a first flowmeter 29 are arranged on the first connecting pipe 11, the first thermometer 26 is used for measuring the temperature of the hot water output by the solar vacuum heat collector 7, so that the hot water reaching the corresponding temperature can be timely conveyed into the hot water storage tank 8; the first flow meter 29 is used for monitoring the flow of hot water passing through the first connecting pipe 11 in real time and reasonably controlling the amount of hot water conveyed to the hot water storage tank 8 by the solar vacuum heat collector 7.
The second connecting pipe 12 is provided with a second thermometer 27 and a second flowmeter 30, the second thermometer 27 is used for measuring the temperature of the hot water output by the heat storage water tank 8, so that the hot water reaching the corresponding temperature can be timely delivered to the phase change heat reservoir, and the second flowmeter 30 is used for monitoring the flow of the hot water passing through the second connecting pipe 12 in real time, and reasonably controlling the amount of the hot water delivered to the phase change heat reservoir from the heat storage water tank 8.
A third thermometer 28 and a third flow meter 31 are arranged on the fourth connecting pipe 14, the third thermometer 28 is used for measuring the temperature of hot water output by the phase change heat reservoir so as to timely convey the hot water reaching the corresponding temperature into the heat storage water tank 8, and the third flow meter 31 is used for monitoring the flow of the hot water passing through the fourth connecting pipe 14 in real time and reasonably controlling the amount of the hot water conveyed to the heat storage water tank 8 by the phase change heat reservoir.
More specifically, the three flow meters are embodied as vortex flow meters; the first thermometer 26 and the first flowmeter 29 are both arranged on one side of the second electromagnetic valve 18 close to the solar vacuum heat collector 7; the second thermometer 27 and the second flowmeter 30 are both arranged on one side of the third electromagnetic valve 19 close to the hot water storage tank 8; the third thermometer 28 and the third flow meter 31 are both provided on the side of the fourth electromagnetic valve 20 close to the three-way switching valve a 32.
Further, in the present embodiment, please refer to fig. 1, further comprising a solar panel 9 and a power supply system (not shown in the figure), wherein the solar panel 9 is connected to the power supply system for providing electric energy to the power supply system. Solar photovoltaic power supply can be utilized to supply power through the arrangement of the solar panel 9, solar energy is utilized in multiple stages, power loss is reduced, and the solar energy water heater is energy-saving and environment-friendly.
The specific working process of this embodiment:
(1) during daytime work, the three-way switching valve A32 keeps the second connecting pipe 12 connected with the phase change liquid storage device, the three-way switching valve B33 keeps the third connecting pipe 13 connected with the phase change liquid storage device, the first electromagnetic valve 17 is opened, the sixth electromagnetic valve 22 is closed, the solar vacuum heat collector 7 heats cold water from the first water inlet pipe 10 by absorbing solar radiation through photo-thermal conversion, then the second electromagnetic valve 18 is opened, the heat storage water tank 8 stores hot water from the first connecting pipe 11, when the water level and the water temperature reach certain requirements, the third electromagnetic valve 19 is opened so that the heat storage water tank 8 conveys the stored hot water to the phase change heat storage device, heat storage is realized by heat exchange between the coiled pipe in the heat conduction silica gel plate 6 and the phase change material unit 5, the phase change heat storage device mixes the flowing low-temperature hot water with the cold water in the first water inlet pipe 10 through the third connecting pipe 13, thereby improving the initial temperature of cold water and further improving the photo-thermal conversion efficiency of the solar vacuum heat collector 7;
(2) when working at night, the three-way switching valve A32 keeps the fourth connecting pipe 14 connected with the phase change liquid storage device, the three-way switching valve B33 keeps the second water inlet pipe 15 connected with the phase change liquid storage device, the first electromagnetic valve 17 is closed, the solar vacuum heat collector 7 stops working, and the heat storage water tank 8 can start working to provide hot water for a user; the sixth electromagnetic valve 22 is opened, the phase change heat reservoir can introduce cold water and exchange heat with the phase change material unit 5 by using the serpentine coil in the heat conduction silica gel plate 6 to release heat, then the fourth electromagnetic valve 20 is opened, hot water output by the phase change heat reservoir is stored in the heat storage water tank 8 through the fourth connecting pipe 14, the fifth electromagnetic valve 21 is opened by the heat storage water tank 8, and domestic hot water is continuously provided for a user through the first water outlet pipe 16 and the second filter 24, so that the heat requirement of the user at night is met.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A phase change heat storage device based on solar energy is characterized by comprising a solar vacuum heat collector, a heat storage water tank, a phase change heat reservoir, a three-way switching valve A and a three-way switching valve B;
the solar vacuum heat collector is provided with a first water inlet pipe, and the heat storage water tank is provided with a first water outlet pipe;
the solar vacuum heat collector is connected with the heat storage water tank through a first connecting pipe;
a first outlet of the three-way switching valve A is connected with a first port of the phase change heat reservoir, a second outlet of the three-way switching valve A is connected with the heat storage water tank through a second connecting pipe, and a third outlet of the three-way switching valve A is connected with the heat storage water tank through a fourth connecting pipe;
the first outlet of the three-way switching valve B is connected with the second port of the phase change heat reservoir, the second outlet of the three-way switching valve B is connected with the outside through a second water inlet pipe, and the third outlet of the three-way switching valve B is connected with the first water inlet pipe through a third connecting pipe.
2. The phase-change thermal storage device according to claim 1, wherein the phase-change liquid reservoir includes a sealed case, a phase-change material unit, and a heat-conductive silicone plate;
the phase change material unit with the heat conduction silica gel board all set up in the inside of sealed housing, just the phase change material unit inlay in the inside of heat conduction silica gel board.
3. The phase-change heat storage device according to claim 2, wherein the phase-change material unit is cylindrical, and the surface of the phase-change material unit is in contact fit with the inner wall of the heat-conducting silica gel plate.
4. The phase-change heat storage device according to claim 2, wherein a plurality of through holes are provided on the heat-conducting silica gel plate; the through hole on the first side of the heat-conducting silica gel plate is connected with the first port of the phase change heat reservoir through a pipeline; and the through hole on the second side of the heat-conducting silica gel plate is connected with the second port of the phase change heat reservoir through a pipeline.
5. The phase-change heat storage device according to claim 4, wherein a U-shaped pipe is connected between two adjacent through holes, so that the pipeline on the heat-conducting silica gel plate forms an S-shaped pipeline.
6. The phase change heat storage device according to claim 2, wherein an inside of the sealed case is filled with a thermal insulation material.
7. The phase-change heat storage device according to claim 1, wherein electromagnetic valves are provided on the first water inlet pipe, the second water inlet pipe, the first connection pipe, the second connection pipe, the third connection pipe, the fourth connection pipe, and the first water outlet pipe.
8. The phase change heat storage device according to claim 1, wherein filters are provided on the first water inlet pipe, the second water inlet pipe, and the first water outlet pipe.
9. The phase change heat storage device according to claim 1, wherein a thermometer and a flowmeter are provided on each of the first connection pipe, the second connection pipe, and the fourth connection pipe.
10. The phase change thermal storage device according to any one of claims 1 to 9, further comprising a solar panel and a power supply system, wherein the solar panel is connected to the power supply system for supplying electric power to the power supply system.
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Application publication date: 20210709 |