CN114061352A - Electric heat energy storage heating device, heating system based on phase change material - Google Patents
Electric heat energy storage heating device, heating system based on phase change material Download PDFInfo
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- CN114061352A CN114061352A CN202111346415.0A CN202111346415A CN114061352A CN 114061352 A CN114061352 A CN 114061352A CN 202111346415 A CN202111346415 A CN 202111346415A CN 114061352 A CN114061352 A CN 114061352A
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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
- 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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
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- 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
- F24D13/00—Electric heating systems
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- 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
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- 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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1096—Arrangement or mounting of control or safety devices for electric heating systems
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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
- F28D20/028—Control arrangements therefor
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- 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
- F24D2200/08—Electric heater
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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
- F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
- F28D2020/0078—Heat exchanger arrangements
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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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
- 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
- Y02B10/40—Geothermal heat-pumps
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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
- 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
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Central Heating Systems (AREA)
Abstract
The invention discloses an electric heating energy storage and heat supply device and system based on phase change materials, which comprise a phase change energy storage unit, wherein the phase change energy storage unit comprises an energy storage box and the phase change materials stored in the energy storage box, a heating unit, a power supply unit and a heat supply unit, the heating unit is used for heating the phase change materials, the power supply unit is used for supplying electric energy to the heating unit, the heat supply unit comprises an air compressor, a heat exchange pipeline and a heat dissipation terminal which are connected, and the control unit is respectively and electrically connected with the heating unit, the power supply unit and the heat supply unit and is used for controlling the heating unit and the heat supply unit to work. The invention has the beneficial effects that: clean electric energy is converted into heat energy by adopting an electric heating phase-change energy storage material, so that the energy is saved and the environment is protected; the water-free heat supply is adopted, so that the heat supply pipeline cannot be blocked, the hot air directly reaches the heat dissipation terminal, the heat loss is small, and the heat supply efficiency is high; the device has simple structure, convenient installation and maintenance, wide application range and wide application range, and can be suitable for various places and is beneficial to popularization and use.
Description
Technical Field
The invention relates to the technical field of heating, in particular to an electric heating energy storage heating device and system based on phase-change materials.
Background
At present, the existing heat supply and heating modes mainly adopt water heating or electric heating. The heating radiator for heating by water is usually a steel product, and the steel radiator can generate rust, corrode and dirt under the effect of perennial water, cause pipeline blockage to influence heating, and in a room with poor heat preservation, the steel radiator is easy to freeze in winter, causes pipeline blockage and damages to influence heating. The electric heating mainly depends on the national power grid for power supply, and the existing power station mainly adopts thermal power generation as the main part and has the defects of air pollution, high carbon emission and the like. With the continuous increase of energy demand and the increasing enhancement of environmental protection, the popularization and application of clean energy such as wind energy, solar energy and the like have become necessary trends, and heat supply and heating through the clean energy are also a utilization form of the clean energy.
The phase-change energy storage material has the characteristics of high heat storage density, long service life, good cycle stability and easiness in control, absorbs and releases heat in the phase-change process to store and release energy, can store the heat, releases the stored heat as required, and can realize heating by utilizing the phase-change energy storage. The existing phase change energy storage heat supply is combined with a solar energy and water circulation system, and the problems of low heat utilization and high maintenance cost exist.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a waterless compressed hot air heating device and a waterless compressed hot air heating system which are safe, environment-friendly, high in heating efficiency, capable of adapting to different weather conditions, simple to install and low in use cost and are based on phase-change materials.
The invention provides an electric heating energy storage heating device based on a phase-change material, which comprises:
the phase change energy storage unit comprises an energy storage box and a phase change material stored in the energy storage box;
the heating unit comprises an electric heating tube and a sleeve sleeved on the periphery of the electric heating tube, and the electric heating tube sleeved with the sleeve extends into the phase-change material and is used for heating the phase-change material;
the heating unit is used for heating the solar energy and supplying electric energy to the solar energy and the solar energy;
the heat supply unit comprises an air compressor, a heat exchange pipeline and a heat dissipation terminal, the heat exchange pipeline is arranged in the energy storage box and is in contact with the phase-change material, an air inlet of the heat exchange pipeline penetrates through the wall of the energy storage box to be connected with the air compressor, and an air outlet of the heat exchange pipeline penetrates through the wall of the energy storage box to be connected with the heat dissipation terminal;
and the control unit is respectively electrically connected with the heating unit, the power supply unit and the heat supply unit and is used for controlling the heating unit and the heat supply unit to work.
As a further improvement of the present invention, the air compressor is a silent compressor, the silent compressor is connected to the air inlet of the heat exchange pipeline, the air inlet of the heat exchange pipeline is located at the bottom of the energy storage box, and the air outlet of the heat exchange pipeline is located at the top of the energy storage box.
As a further improvement of the invention, the phase change material is sodium acetate trihydrate.
As a further improvement of the invention, the heat exchange pipeline is a spiral pipe, and the spiral pipe is arranged around the electric heating pipe.
As a further improvement of the present invention, there are a plurality of the heat dissipation terminals, and the plurality of the heat dissipation terminals are connected in series or in parallel.
As a further improvement of the present invention, the heat dissipation terminal includes: the device comprises a main air pipe, a spray pipe, a branch pipe, a valve and a pressure regulator, wherein the branch pipe is connected with the main air pipe and the spray pipe; the main air pipe is communicated with an air outlet of the heat exchange pipeline, and a plurality of air outlet holes are formed in the spray pipe.
As a further improvement of the invention, the heat dissipation terminal further comprises a heat insulation plate and a heat conduction metal plate, the heat insulation plate and the heat conduction metal plate form a hollow cavity, and the spray pipe is placed in the hollow cavity.
As a further improvement of the invention, the electric heating tube is an alternating current and direct current double-voltage electric heating tube.
As a further improvement of the present invention, the heating unit further includes a temperature control probe, the temperature control probe is disposed on the sleeve and close to the air outlet of the heat exchange pipeline, and the temperature control probe is connected to the control unit and is used for controlling the heating temperature of the electric heating tube.
As a further improvement of the present invention, the air compressor is a silent compressor.
The invention further provides a heating system, the heating system is used for the agricultural greenhouse, the heating system adopts any one of the phase-change-material-based electric heating energy-storage heating devices, and a heat dissipation terminal of the phase-change-material-based electric heating energy-storage heating device is arranged in soil in the agricultural greenhouse and used for directly heating the plant root system.
As a further improvement of the invention, the electric heating energy storage and heat supply device based on the phase change material comprises:
the phase change energy storage unit comprises an energy storage box and a phase change material stored in the energy storage box;
the heating unit comprises an electric heating tube and a sleeve sleeved on the periphery of the electric heating tube, and the electric heating tube sleeved with the sleeve extends into the phase-change material and is used for heating the phase-change material;
the power supply unit is used for providing electric energy for the heating unit and comprises one or more of a photovoltaic power generation unit, a wind power generation unit and a power grid power supply unit;
the heat supply unit comprises an air compressor, a heat exchange pipeline and a heat dissipation terminal, the heat exchange pipeline is arranged in the energy storage box and is in contact with the phase-change material, an air inlet of the heat exchange pipeline penetrates through the box wall of the energy storage box to be connected with the air compressor, and an air outlet of the heat exchange pipeline penetrates through the box wall of the energy storage box to be connected with the heat dissipation terminal; the heat dissipation terminal is arranged on the ground surface or below the ground in the agricultural greenhouse;
and the control unit is respectively electrically connected with the heating unit, the power supply unit and the heat supply unit and is used for controlling the heating unit and the heat supply unit to work.
As a further improvement of the invention, the phase change material is sodium acetate trihydrate.
As a further improvement of the invention, the heat exchange pipeline is a spiral pipe, and the spiral pipe is arranged around the electric heating pipe.
As a further improvement of the present invention, the heat dissipation terminal includes: the device comprises a main air pipe, a spray pipe, a branch pipe, a valve and a pressure regulator, wherein the branch pipe is connected with the main air pipe and the spray pipe; the main air pipe is communicated with an air outlet of the heat exchange pipeline, and a plurality of air outlet holes are formed in the spray pipe.
As a further improvement of the present invention, there are a plurality of the heat dissipation terminals, and the plurality of the heat dissipation terminals are connected in series or in parallel.
As a further improvement of the invention, the heat dissipation terminal further comprises a heat insulation plate and a heat conduction metal plate, a hollow cavity is formed by the heat insulation plate and the heat conduction metal plate, and the spray pipe is placed in the hollow cavity.
As a further improvement of the invention, the electric heating tube is an alternating current and direct current double-voltage electric heating tube.
As a further improvement of the present invention, the heating unit further includes a temperature control probe, the temperature control probe is disposed on the sleeve and close to the air outlet of the heat exchange pipeline, and the temperature control probe is connected to the control unit and is used for controlling the heating temperature of the electric heating tube.
As a further improvement of the present invention, the air compressor is a silent compressor.
The invention has the beneficial effects that: clean electric energy is converted into heat energy by adopting an electric heating phase-change energy storage material, so that the energy is saved and the environment is protected; the compressed air is heated through heat energy to realize anhydrous heat supply, and the anhydrous heat supply can not generate rust, corrosion and dirt or ice, so that a heat supply pipeline can not be blocked, and the pipeline maintenance work is reduced; the material is safe, can be installed indoors, and the hot air directly reaches the heat dissipation terminal, so that the heat loss is small, and the heat supply efficiency is high; the device has the advantages of simple structure, convenient installation and maintenance, wide application range, easy popularization and suitability for various places, and is particularly suitable for non-central heating areas. The electric heating energy storage and heat supply device based on the phase change material is used for supplying heat to the agricultural greenhouse, soil (plant root system) is directly heated through the heat dissipation terminal, a good growing environment can be provided for plants, the output period is further shortened, the yield is improved, and the heat supply device is low in installation and maintenance cost, long in service life and beneficial to large-scale popularization and use.
Drawings
Fig. 1 is a schematic structural diagram of an electric heating energy storage and heat supply device based on a phase change material according to an embodiment of the present invention;
FIG. 2 is a structural diagram of an electrothermal energy-storage heating device of a phase-change material for photovoltaic power generation according to an embodiment of the present invention;
fig. 3 is a structural diagram of a multiple heating unit and a phase-change material electrothermal energy-storage heating device of the multiple heating unit according to an embodiment of the present invention.
In the figure, the position of the upper end of the main shaft,
1. an air compressor; 2. a spiral tube; 3. an outer case; 4. a thermal insulation material; 5. an inner box body; 6. a phase change material; 7. a sleeve; 8. an electric heating tube; 9. a photovoltaic panel; 10. a control unit; 11. a skirting line type hot air injector; 12. a valve; 13. a voltage regulator; 14. a nozzle; 15. a main air duct; 16. a temperature control probe; 17. a branch pipe; 18. novel geothermal energy; 19. a floor; 20. a heat conductive metal plate; 21. a geothermal nozzle; 22. a heat insulation plate; 23. a power supply unit; 24. a heat supply unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 disclosure.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, in the description of the present invention, the terms used are for illustrative purposes only and are not intended to limit the scope of the present disclosure. The terms "comprises" and/or "comprising" are used to specify the presence of elements, steps, operations, and/or components, but do not preclude the presence or addition of one or more other elements, steps, operations, and/or components. The terms "first," "second," and the like may be used to describe various elements, not necessarily order, and not necessarily limit the elements. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified. These terms are only used to distinguish one element from another. These and/or other aspects will become apparent to those of ordinary skill in the art in view of the following drawings, and the description of the embodiments of the present invention will be more readily understood. The drawings are used for the purpose of illustrating embodiments of the disclosure only. One skilled in the art will readily recognize from the following description that alternative embodiments of the illustrated structures and methods of the present invention may be employed without departing from the principles of the present disclosure.
An embodiment of the present invention provides an electric heating energy storage and heat supply device based on a phase change material, as shown in fig. 1, the device includes: a phase change energy storage unit, a heating unit, one or more power supply units 23, one or more heat supply units 24 and a control unit 10; the phase change energy storage unit comprises an energy storage box and a phase change material 6 stored in the energy storage box; the energy storage box includes outer box 3 and interior box 5, fills insulation material 4 between outer box 3 and the interior box 5, is equipped with the through-hole that supplies the heat exchange pipeline to run through on the tank wall of energy storage box, and through-hole and heat exchange pipeline junction sealing treatment.
The heating unit comprises an electric heating tube 8 and a sleeve 7 sleeved on the periphery of the electric heating tube 8, and the electric heating tube 8 sleeved with the sleeve 7 extends into the phase-change material 6 and is used for heating the phase-change material 6; the electrothermal tubes 8 can be arranged in a plurality, each electrothermal tube 8 is provided with a sleeve 7, the sleeves 7 have a protection effect on the electrothermal tubes 8, the electrothermal tubes 8 are prevented from directly contacting the phase-change materials 6, and the sleeves 7 made of different materials can be selected according to the different phase-change materials 6. In order to realize the uniform heating of the phase-change material 6, the electric heating tubes 8 are uniformly distributed in the energy storage box.
The power supply unit 23 is used for providing electric energy for the heating unit, and the power supply unit 23 includes one or more of a photovoltaic power generation unit, a wind power generation unit and a power grid power supply unit. The photovoltaic power generation unit generates photovoltaic electricity through the photovoltaic plate 9 and works through the photovoltaic electric drive electric heating tube 8. The wind power generation unit converts wind energy into electric energy, the electric energy generated by the wind power generation unit drives the electric heating tube 8 to work, and the power grid power supply unit supplies electric energy to the electric heating tube 8 by using the electricity of residents. The power supply unit of three kinds of differences provides the electric energy for the heating unit under the weather condition of difference, can the exclusive use, also can use in combination, through using in combination, can make the power supply of device guarantee to some extent, improves the stability of device. The power supply unit of different modes is used in combination with the phase-change material, the phase-change material can store heat generated by the electric heating tube when the power supply unit can generate electric energy to heat the electric heating tube (for example, the photovoltaic power generation unit generates electricity in the daytime, and the wind power generation unit generates electricity when wind exists), and cold air is introduced into the heat exchange pipeline through the air compressor when needed (for example, at night), so that the heat stored by the phase-change material is released in a heat exchange mode.
The heat supply unit 24 comprises an air compressor 1, a heat exchange pipeline and a heat dissipation terminal, the heat exchange pipeline is arranged inside the energy storage box and is in contact with the phase change material 6, an air inlet of the heat exchange pipeline penetrates through the box wall of the energy storage box to be connected with the air compressor 1, and an air outlet of the heat exchange pipeline penetrates through the box wall of the energy storage box to be connected with the heat dissipation terminal;
the control unit 10 is electrically connected with the heating unit, the power supply unit 23 and the heat supply unit 24 respectively, and is used for controlling the heating unit and the heat supply unit 24 to work.
In an alternative embodiment, the air compressor 1 is preferably a silent compressor to avoid noise pollution, the silent compressor is connected to the air inlet of the heat exchange pipeline, the air inlet of the heat exchange pipeline is located at the bottom of the energy storage box, the air outlet of the heat exchange pipeline is located at the top of the energy storage box, and hot air circulates from the bottom to the top of the energy storage box, so that the hot air can flow more conveniently.
In an alternative implementation manner, as shown in fig. 2, the electric heating energy storage and heat supply device based on the phase change material of this embodiment includes a plurality of phase change energy storage units, and each phase change energy storage unit is provided with a heating unit, a power supply unit 23, and a heat supply unit 24; the heating units are powered by the power supply unit 23, the power supply unit 23 is provided with a plurality of heating units, one heating unit can be correspondingly provided with one or more heating units 24, one phase change energy storage unit is provided with one or more heating units 24, and the plurality of heating units 24 can work simultaneously or alternatively; the control unit 10 can independently control one phase change energy storage unit and the heating unit, the power supply unit 23 and the heat supply unit 24 which are correspondingly arranged, and can also simultaneously control a plurality of heating units and a plurality of heat supply units to work simultaneously. For example, a plurality of electric heating tubes 8 are arranged in the energy storage box to heat the phase change material 6 in the energy storage box, the electric heating tubes 8 are powered by a plurality of power supply units 23, the plurality of power supply units 23 can be different forms of power supplies, two heat exchange pipelines are arranged in the energy storage box, and each heat exchange pipeline is provided with one air compressor 1 and is connected with different heat dissipation terminals. The electrical heating tube 8 and the air compressor 1 can be controlled by a control unit 10.
In an alternative embodiment, as shown in fig. 2, the photovoltaic power generation unit generates photovoltaic power through a photovoltaic panel 9, and operates by driving an electrothermal tube 8 with photovoltaic power. The photovoltaic panel 9 can be directly installed on a roof, for example, photovoltaic electricity is directly used for supplying power to the electric heating energy storage and heat supply device based on the phase change material, a large amount of photovoltaic electricity is consumed, firepower generated energy is reduced, and the electric heating energy storage and heat supply device has important values for energy conservation and emission reduction.
In an alternative embodiment, the power supply unit 23 further comprises a storage battery, different power generation devices are respectively and separately provided with the storage battery to store the generated electric energy, the storage battery is directly and electrically connected with the electric heating tube 8, and different types of power supply units 23 are provided with the electric heating tubes 8 matched with the power supply units. The control unit 10 is respectively connected with the photovoltaic power generation unit, the wind power generation unit and the power grid power supply unit, the power generation conditions of different power generation units are detected in real time, the different power generation units are adopted to provide electric energy for the electric heating tube 8 through timely adjustment and switching of the monitored power generation and power utilization conditions, and the stability of electric energy supply of the device is improved. And clean electric energy such as photovoltaic power, wind power and the like is adopted, so that carbon emission can be reduced. The power supply unit 23 includes one or more of a photovoltaic power generation unit, a wind power generation unit and a power grid power supply unit, the corresponding electric heating tube 8 may be, for example, an ac/dc dual-voltage electric heating tube, and due to the ac or dc power generated or provided by different power supply units, the ac/dc dual-voltage electric heating tube can be adapted to various power supply units 24, thereby improving the compatibility and stability of the device.
In an alternative embodiment, the phase change material 6 is a chemical energy phase change material, such as sodium acetate trihydrate. The sodium acetate trihydrate is used as a hydrated salt heat storage material, the latent heat value is more than 200kj/kg, the latent heat advantage is great, and the melting point of the sodium acetate trihydrate is about 58 ℃, so that the sodium acetate trihydrate is very suitable for application of heat storage engineering in a normal temperature range. The sodium acetate trihydrate has various different formulas, the heating temperature of the sodium acetate trihydrate selected by the invention can reach about 80 degrees, and the heat attenuation of the selected sodium acetate trihydrate is reduced, so that the temperature can be well maintained. Sodium acetate trihydrate is applied to the electric heating energy storage and heat supply device based on the phase change material, the size is small, the heat storage capacity is large, the latent heat value is dozens of times to hundreds of times of the specific heat value, 1 kilogram of chemical phase change material is equal to the heat storage capacity of 90 kilograms of water, 200 kilograms to 300 kilograms of phase change chemical material is the heat storage capacity of 18 tons to 27 tons of water, the heat efficiency is high, the price is low, the electric heating energy storage and heat supply device can be continuously used for more than 20 years, the service life is long, and the electric heating energy storage and heat supply device is food-grade non-toxic and harmless material, has no explosion hidden danger and is high in safety.
In an alternative embodiment, the heat exchange pipeline of the heating unit 24 employs a coil 2, and the coil 2 is disposed around the electric heating tube 8. The contact area between the heat exchange pipeline and the phase change material 6 can be increased by adopting the spiral pipe 2, the heat exchange rate is improved, the temperature around the electric heating pipe 8 is closer to the heating temperature set by the electric heating pipe 8, and the spiral pipe 2 is arranged around the electric heating pipe 8, so that the control of the air temperature in the spiral pipe 2 is facilitated. As shown in fig. 3, one or more coils 2 may be disposed in one energy storage tank, and a plurality of coils 2 may be disposed in parallel or in series. An air inlet of the spiral pipe 2 is connected with an air compressor 1, and an outlet of the spiral pipe 2 is connected with a heat dissipation terminal. The control unit 10 is connected to the air compressors 1 and controls the air compressors 1 to operate, and the control unit 10 may control the plurality of air compressors 1 to operate individually or simultaneously, and provide hot air as the heat supply unit 24 connected to the air compressors 1 by controlling the operation of the air compressors 1. A plurality of heating units 24 can be correspondingly arranged in one heating unit, and one heating unit comprises a plurality of electric heating pipes 8, wherein a spiral pipe 2 is arranged on the periphery of part of the electric heating pipes. The heat exchange pipes of the heating unit 24 may also be arranged by using serpentine pipes or other pipes which are advantageous for increasing the heat exchange area.
In an alternative embodiment, as shown in fig. 2, the heat dissipation terminal includes a main duct 15, a nozzle 14, a branch duct 17 connecting the main duct 15 and the nozzle 14, and a valve 12 and a pressure regulator 13 disposed on the branch duct 17, the main duct 15 is communicated with an air outlet of the heat exchange pipeline, and the nozzle 14 is provided with a plurality of air outlets. The valve 12 and the pressure regulator 13 can be manually or automatically controlled, the valve 12 and the pressure regulator 13 in an automatic control mode adopt electric control devices and are connected with the control unit 10, and the control unit 10 controls the opening of the valve 12 or the pressure regulator 13. The radiating terminal can be used as a skirting line type hot air injector 11, hot air flow from the lower part to the top space of a room naturally forms a large circulation optimal state, a heat source is saved, and the heat efficiency is high. The plurality of heat dissipation terminals can be arranged in series or in parallel, or connected in series and then in parallel, or connected in parallel and then in series. Compare in the heating methods of water heating or other medium, the heat dissipation terminal installation of this application is more convenient, and the limited degree of connected mode is littleer, can be according to indoor area, nimble increase and decrease heat dissipation terminal's quantity, and the adaptability is stronger, has favourable to popularize and quote.
In an alternative embodiment, as shown in fig. 2, the heat dissipation terminal includes a heat insulation board 22, a heat conductive metal plate 20, a main air pipe 15, a nozzle 14, a branch pipe 17 connecting the main air pipe 15 and the nozzle 14, and a valve 12 and a pressure regulator 13 disposed on the branch pipe 17, a hollow cavity is formed by the heat insulation board 22 and the heat conductive metal plate 20, the nozzle is disposed in the hollow cavity, the heat insulation board 22 can prevent heat dissipation, the heat conductive metal plate 20 serves as a heat dissipation surface, the heat dissipation surface can also be made of a non-metal material, and the heat dissipation surface has good heat conduction performance. The novel geothermal heat 18 may be formed by laying a floor, carpet, tile, or the like on the heat conductive metal plate 20, and the heat conductive metal plate 20 may be an aluminum plate or an iron plate. Different types of heat dissipation terminals (such as a skirting line type hot air ejector 11 and novel geothermal heat 18) can be used in a matched mode, and according to design requirements, a plurality of different types of heat dissipation terminals can be connected in series or in parallel, so that the connection modes are various, and different forms of heat supply requirements can be met.
In an alternative embodiment, the heating unit includes a temperature control probe 16, an electrical heating tube 8 and a sleeve 7 sleeved on the periphery of the electrical heating tube 8, the temperature control probe 16 is disposed on the sleeve and close to the air outlet of the heat exchange pipeline, and the temperature control probe 16 is connected to the control unit 10 for controlling the heating temperature of the electrical heating tube 8. The temperature control probe 16 detects the heating temperature of the electric heating tube 8 in real time, and the control unit 10 controls the electric heating tube 8 to be turned on or turned off according to the monitored real-time temperature of the electric heating tube 8, so that the heating temperature of the electric heating tube 8 is within a set working temperature range (for example, set to 45 ℃ -65 ℃), and the accurate regulation and control of the heating temperature are realized.
The electric heating energy storage and heat supply device based on the phase change material is suitable for markets, factories, schools, station airports, expressway service areas, commercial buildings, field work tents, Mongolian bags, pasture farms, vast rural residential houses and the like, is integrated with photovoltaic buildings, directly utilizes clean energy such as photovoltaic electricity, wind power electricity and the like to provide electric energy, is energy-saving and environment-friendly, can be used for designing heat supply devices with different sizes according to different heating areas, can be installed indoors, and has small heat loss; the device has low installation and use cost and easy maintenance, can be used for disaster relief and prevention, has high use value and economic value, and is favorable for large-scale popularization and use.
The embodiment of the invention also provides a heating system, which is applied to the agricultural greenhouse, the heating system adopts any one of the phase-change-material-based electric heating energy-storage heating devices in the optional embodiment of the invention, and a heat dissipation terminal of the heating device is arranged in soil in the agricultural greenhouse and is used for directly heating the plant root system.
In a preferred embodiment, the heating system comprises a phase change energy storage unit, a heating unit, a power supply unit 23, a heating unit 24 and a control unit 10.
The phase change energy storage unit comprises an energy storage box and a phase change material 6 stored in the energy storage box; the energy storage box includes outer box 3 and interior box 5, fills insulation material 4 between outer box 3 and the interior box 5, is equipped with the through-hole that supplies the heat exchange pipeline to run through on the tank wall of energy storage box, and through-hole and heat exchange pipeline junction sealing treatment. Optionally, the phase-change material 6 is sodium acetate trihydrate.
The power supply unit 23 includes one or more of a photovoltaic power generation unit, a wind power generation unit, or a grid power supply unit. The photovoltaic power generation unit generates photovoltaic electricity through the photovoltaic plate 9, the electric heating tube is driven to work through photovoltaic electricity, the wind power generation unit converts wind energy into electric energy, the electric heating tube 8 is driven to work through the electric energy generated by wind power generation, and the power grid power supply unit provides the electric energy for the electric heating tube 8 through residential electricity. The three different power supply units 23 provide electric energy for the heating units under different weather conditions, can be used independently or in combination, and can ensure that the power supply of the device is guaranteed and improve the stability of the device by using in combination.
The heating unit comprises an electric heating tube 8 and a sleeve 7 sleeved on the periphery of the electric heating tube 8, and the electric heating tube 8 sleeved with the sleeve 7 extends into the phase-change material 6 and is used for heating the phase-change material 6; the electrothermal tubes 8 can be arranged in a plurality, each electrothermal tube 8 is provided with a sleeve 7, the sleeves 7 have a protection effect on the electrothermal tubes 8, the electrothermal tubes 8 are prevented from directly contacting the phase-change materials 6, and the sleeves 7 made of different materials can be selected according to the different phase-change materials 6. In order to realize the uniform heating of the phase-change material 6, the electric heating tubes 8 are uniformly distributed in the energy storage box. Optionally, the heat exchange pipeline adopts a spiral pipe 2, the spiral pipe 2 is arranged around the electric heating pipe 8, the contact area between the heat exchange pipeline and the phase-change material 6 can be increased by adopting the spiral pipe 2, and the heat exchange rate is improved. Optionally, the electric heating tube 8 is an ac/dc dual-voltage electric heating tube, and the ac/dc dual-voltage electric heating tube can adapt to various power supply units, thereby improving the compatibility of the device.
The power supply unit 23 is used for providing electric energy for the heating unit, the heating unit comprises an air compressor 1, a heat exchange pipeline and a heat dissipation terminal, the heat exchange pipeline is arranged inside the energy storage box and is in contact with the phase-change material 6, an air inlet of the heat exchange pipeline penetrates through the box wall of the energy storage box and is connected with the air compressor 1, and an air outlet of the heat exchange pipeline penetrates through the box wall of the energy storage box and is connected with the heat dissipation terminal. The heat dissipation terminal comprises a heat insulation plate 22, a heat conduction metal plate 20, a main air pipe 15, a spray pipe 14, a branch pipe 17 connecting the main air pipe 15 and the spray pipe 14, a valve 12 and a pressure regulator 13 arranged on the branch pipe 17, wherein a hollow cavity is formed by the heat insulation plate 22 and the heat conduction metal plate 20, the geothermal spray pipe 21 is arranged in the hollow cavity, the heat insulation plate 22 can prevent heat dissipation, and the heat conduction metal plate 20 is used as a heat dissipation surface. The heat dissipation terminal is buried under soil in the agricultural greenhouse to form anhydrous compressed hot air geothermal heat, so that the root system of the plant is directly heated, the ground temperature is increased, the rise of hot air flow is increased, and the whole greenhouse is warm. The heat exchange pipeline does not need to be blocked for maintenance, a large amount of maintenance cost is saved, meanwhile, a good plant growth environment can be provided, the growth period is shortened (15 days to 1 month), the yield is improved (15 percent to 20 percent), and the energy is saved by more than 30 percent.
The control unit 10 is connected with the air compressor 1 and controls the air compressor 1 to work, the control unit 10 is respectively connected with the photovoltaic power generation unit, the wind power generation unit or the power grid power supply unit, the power generation conditions of different power generation units are detected in real time, and the different power generation units are adopted to provide electric energy for the electric heating pipe 8 through timely adjustment and switching of the monitored power generation and power utilization conditions; the valve 12 and the pressure regulator 13 are connected with the control unit 10, and the control unit 10 controls the opening of the valve 12 or the pressure regulator 13. The air outlet of the heat exchange pipeline is provided with a temperature control probe, the temperature control probe 16 is connected with the control unit 10 and used for controlling the heating temperature of the electric heating tube 8, the temperature probe 16 detects the heating temperature of the electric heating tube 8 in real time, and the control unit 10 controls the electric heating tube 8 to be opened or closed to work according to the monitored real-time temperature of the electric heating tube 8, so that the heating temperature of the electric heating tube 8 is in the set working temperature range, and the accurate regulation and control of the heat supply temperature in the agricultural greenhouse are realized.
Compared with the traditional greenhouse heating, if a coal, electricity, oil and natural gas radiator and a heat separation furnace product lamp are adopted, most of the temperature is concentrated in the ceiling space, the soil cannot be heated, the heat efficiency is low, the crop production is slow, and the cold weather is more serious (the frost damage and the yield reduction occur) if the cold weather occurs. The electric heating energy storage and heat supply device based on the phase change material is used for supplying heat to an agricultural greenhouse, soil (plant root systems) is directly heated through the heat dissipation terminal, the soil temperature is detected, the heat supply device is controlled to heat the soil to the temperature most beneficial to plant production, soil moisture loss caused by overhigh temperature is avoided, and the electric heating energy storage and heat supply device can be matched with a plastic film for moisture preservation and heat preservation, so that a good growth environment can be provided for plants, the output period is further shortened, and the yield is improved. And because the installation and maintenance cost of heating device itself is lower, long service life is favorable to using widely on a large scale.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those of ordinary skill in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
It will be understood by those skilled in the art that while the present invention has been described with reference to exemplary embodiments, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. An electric heating energy storage heating device based on phase change materials is characterized by comprising:
the phase change energy storage unit comprises an energy storage box and a phase change material stored in the energy storage box;
the heating unit comprises an electric heating tube and a sleeve sleeved on the periphery of the electric heating tube, and the electric heating tube sleeved with the sleeve extends into the phase-change material and is used for heating the phase-change material;
the heating unit is used for heating the solar energy and supplying electric energy to the solar energy and the solar energy;
the heat supply unit comprises an air compressor, a heat exchange pipeline and a heat dissipation terminal, the heat exchange pipeline is arranged in the energy storage box and is in contact with the phase-change material, an air inlet of the heat exchange pipeline penetrates through the wall of the energy storage box to be connected with the air compressor, and an air outlet of the heat exchange pipeline penetrates through the wall of the energy storage box to be connected with the heat dissipation terminal;
and the control unit is respectively electrically connected with the heating unit, the power supply unit and the heat supply unit and is used for controlling the heating unit and the heat supply unit to work.
2. An electrothermal energy-storage and heat-supply device based on phase-change material according to claim 1, wherein the air compressor is a silent compressor, the silent compressor is connected to the air inlet of the heat exchange pipeline, the air inlet of the heat exchange pipeline is located at the bottom of the energy-storage box, and the air outlet of the heat exchange pipeline is located at the top of the energy-storage box.
3. An electrothermal energy-storage and heat-supply device based on phase-change material according to claim 1, wherein the phase-change material is sodium acetate trihydrate.
4. An electrothermal energy-storage and heat-supply apparatus based on phase-change material according to claim 1, wherein the heat exchange tube is a spiral tube, and the spiral tube is disposed around the electrothermal tube.
5. An electrothermal energy-storage and heat-supply apparatus based on phase-change material according to claim 1, wherein the heat-dissipating terminals are plural, and the plural heat-dissipating terminals are connected in series or in parallel.
6. An electrothermal energy-storage and heat-supply apparatus based on phase-change material according to claim 1 or 5, wherein the heat-dissipating terminal comprises: the device comprises a main air pipe, a spray pipe, a branch pipe, a valve and a pressure regulator, wherein the branch pipe is connected with the main air pipe and the spray pipe; the main air pipe is communicated with an air outlet of the heat exchange pipeline, and a plurality of air outlet holes are formed in the spray pipe.
7. An electrothermal energy-storage and heat-supply apparatus based on phase-change material according to claim 6, wherein the heat-dissipating terminal further comprises a heat-insulating plate and a heat-conducting metal plate, the heat-insulating plate and the heat-conducting metal plate form a hollow chamber, and the spray pipe is disposed in the hollow chamber.
8. An electrothermal energy-storage and heat-supply device based on phase-change material according to claim 1, wherein the electrothermal tube is an AC/DC dual-voltage electrothermal tube.
9. The electrothermal energy-storage and heat-supply device based on phase-change material according to claim 1, wherein the heating unit further comprises a temperature control probe, the temperature control probe is disposed on the casing and close to the air outlet of the heat exchange pipeline, and the temperature control probe is connected to the control unit and is used for controlling the heating temperature of the electrothermal tube.
10. A heating system, which is used in an agricultural greenhouse, the heating system adopts the electric heating energy storage and supply device based on phase change materials as claimed in any one of claims 1 to 9, and the heat dissipation terminal is arranged in soil in the agricultural greenhouse and used for directly heating a plant root system.
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| CN202111346415.0A CN114061352A (en) | 2021-11-15 | 2021-11-15 | Electric heat energy storage heating device, heating system based on phase change material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865196A (en) * | 2022-06-10 | 2022-08-05 | 贵州电网有限责任公司 | Cold region self-temperature-control photovoltaic system battery box and temperature control method |
| CN115223436A (en) * | 2022-07-07 | 2022-10-21 | 西安热工研究院有限公司 | Experimental model device for simulating operation of gravity compressed air energy storage system |
-
2021
- 2021-11-15 CN CN202111346415.0A patent/CN114061352A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865196A (en) * | 2022-06-10 | 2022-08-05 | 贵州电网有限责任公司 | Cold region self-temperature-control photovoltaic system battery box and temperature control method |
| CN115223436A (en) * | 2022-07-07 | 2022-10-21 | 西安热工研究院有限公司 | Experimental model device for simulating operation of gravity compressed air energy storage system |
| CN115223436B (en) * | 2022-07-07 | 2023-11-17 | 西安热工研究院有限公司 | Experimental model device for simulating operation of gravity compressed air energy storage system |
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