CN110631264A - Flat plate type heat collection system and heat collection method - Google Patents

Flat plate type heat collection system and heat collection method Download PDF

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Publication number
CN110631264A
CN110631264A CN201910663715.8A CN201910663715A CN110631264A CN 110631264 A CN110631264 A CN 110631264A CN 201910663715 A CN201910663715 A CN 201910663715A CN 110631264 A CN110631264 A CN 110631264A
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CN
China
Prior art keywords
heat
metal
flat plate
ventilation opening
shell
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Pending
Application number
CN201910663715.8A
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Chinese (zh)
Inventor
李志永
赵飞
孙鹏程
齐月松
岳玉亮
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China State Construction Engineering Corp Ltd CSCEC
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China State Construction Engineering Corp Ltd CSCEC
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Application filed by China State Construction Engineering Corp Ltd CSCEC filed Critical China State Construction Engineering Corp Ltd CSCEC
Priority to CN201910663715.8A priority Critical patent/CN110631264A/en
Publication of CN110631264A publication Critical patent/CN110631264A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/70Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00Arrangements for controlling solar heat collectors
    • F24S50/80Arrangements for controlling solar heat collectors for controlling collection or absorption of solar radiation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00Arrangements for storing heat collected by solar heat collectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00Details of absorbing elements
    • F24S70/10Details of absorbing elements characterised by the absorbing material
    • F24S70/12Details of absorbing elements characterised by the absorbing material made of metallic material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S90/00Solar heat systems not otherwise provided for
    • F24S90/10Solar heat systems not otherwise provided for using thermosiphonic circulation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems

Abstract

The invention discloses a flat plate type heat collecting system and a heat collecting method, and relates to the technical field of solar heat utilization, wherein the system comprises a flat plate type heat collector, a first valve, a first fan, a second valve, a second fan, a heat reservoir and a heat output device; the flat plate type heat collectors are mutually connected in series and/or in parallel, a total inlet after the series connection and/or the parallel connection is connected with an outlet of the heat reservoir through a pipeline, and the total outlet is sequentially connected with the inlet of the heat reservoir through a first valve and a first fan through the pipeline; the inlet of the heat outputting device is connected with the outlet of the heat reservoir through a pipeline, the outlet of the heat outputting device is connected with the heat reservoir through a second valve through a pipeline, and the second fan is connected to the two ends of the second valve in parallel. The invention has the advantages of high photo-thermal conversion efficiency and strong heat storage capacity.

Description

Flat plate type heat collection system and heat collection method
Technical Field
The invention relates to the technical field of solar heat utilization, in particular to a flat plate type heat collecting system and a heat collecting method.
Background
Solar energy is a renewable new energy source, has the advantages of environmental protection and long-term use, is one of important choices for coping with energy shortage and climate change, and is more and more strongly concerned by people in the world. The solar energy utilization technology mainly refers to technology for converting solar energy into heat energy, mechanical energy, electric energy, chemical energy and the like, wherein the solar energy is most widely developed and has the longest history of heat energy conversion, and is called solar heat utilization.
At present, the heat collector of a popular flat plate type solar heat collecting system is provided with a heat absorbing body which is a heat absorbing plate made of metal, plastic, rubber, ceramic and the like, and the heat absorbing plate is structurally provided with a calandria and a header pipe.
The coating material of the absorber plate plays a very important role in absorbing solar radiation energy. Because the wavelength of solar radiation is mainly concentrated in the range of 0.3-2.5um, and the thermal radiation of the absorber plate is mainly concentrated in the wavelength range of 2-20um, a selective coating is needed to enhance the absorption capacity of the absorber plate for solar radiation, reduce heat loss and reduce the thermal radiation of the absorber plate. The selective coating has high absorptivity to solar short-wave radiation and low emissivity to long-wave radiation, and most of the current home and abroad production plants adopt a magnetron sputtering method to manufacture the selective coating, so that the absorptivity can reach 0.93-0.95, the emissivity can reach 0.12-0.04, and the heat absorption performance is greatly improved.
However, despite these technical measures, the flat plate solar thermal collector still cannot overcome the problems of relatively small heat absorption area and relatively large heat loss. The heat absorption area is limited, the area of the heat absorption plate is limited by the volume of the heat collector, the heat absorption area is further limited, and the volume of the solar heat collector cannot be increased infinitely. Although the selective coating improves the heat absorption efficiency of the heat absorption plate, the heat loss is increased when the temperature of the heat absorption plate is increased, and the heat loss can be reduced only by improving the material of the heat insulation layer, or thickening the glass cover plate, and adding the transparent honeycomb. Therefore, the photothermal conversion efficiency is greatly influenced by the heat absorption plate material and structure, in order to improve the conversion efficiency, only expensive materials and complex mechanisms can be selected, the processing cost is very high, and the processing difficulty is very large.
Disclosure of Invention
Therefore, the technical problem to be solved by the embodiments of the present invention is that the light-heat conversion efficiency of the heat collecting system in the prior art is low.
To this end, a flat plate heat collecting system according to an embodiment of the present invention includes: the heat collector comprises a flat plate type heat collector, a first valve, a first fan, a second valve, a second fan, a heat reservoir and a heat output device;
the flat plate type heat collectors are mutually connected in series and/or in parallel, a total inlet after the series connection and/or the parallel connection is connected with an outlet of the heat reservoir through a pipeline, and the total outlet is sequentially connected with the inlet of the heat reservoir through a first valve and a first fan through the pipeline;
the inlet of the heat outputting device is connected with the outlet of the heat reservoir through a pipeline, the outlet of the heat outputting device is connected with the heat reservoir through a second valve through a pipeline, and the second fan is connected to the two ends of the second valve in parallel.
Preferably, the flat plate type heat collector includes: the glass plate, the metal mesh component, the heat preservation layer, the shell, the first ventilation opening and the second ventilation opening;
the glass plate is covered on the upper part of the cavity surrounded by the shell and is connected with the shell in a sealing way;
at least two metal reticular components are connected in the cavity in a laminated array mode and have the functions of heat storage and convection limitation;
the heat preservation layer is connected with the inner wall of the shell;
the first ventilation opening is arranged on a first side wall of the shell, the second ventilation opening is arranged on a second side wall of the shell, wherein the second side wall is opposite to the first side wall, and the first ventilation opening and the second ventilation opening are arranged in a non-coaxial staggered mode.
Preferably, the metal mesh member is a steel mesh.
Preferably, the wire of the steel wire mesh is a hollow tube, and the interior of the hollow tube is filled with heat absorption liquid.
Preferably, the flat plate type heat collector includes: the glass plate, the metal mesh component, the heat preservation layer, the shell, the first ventilation opening and the second ventilation opening;
the glass plate is covered on the upper part of the cavity surrounded by the shell and is connected with the shell in a sealing way;
at least two metal mesh members are connected in a stacked array within the cavity with adjustable heat storage and convection limiting;
the heat preservation layer is connected with the inner wall of the shell;
the first ventilation opening is arranged on a first side wall of the shell, the second ventilation opening is arranged on a second side wall of the shell, wherein the second side wall is opposite to the first side wall, and the first ventilation opening and the second ventilation opening are arranged in a non-coaxial staggered mode.
Preferably, the metal mesh member comprises a first metal tube sheet and a second metal tube sheet;
the first metal tube plate and the second metal tube plate respectively comprise metal tubes which are arranged in parallel, the metal tubes which are arranged in parallel form a plate shape, each metal tube is provided with a tube cover, and the tube covers and the tube walls of the metal tubes are rotatably connected through a rotating shaft and are used for adjusting heat storage and limiting convection according to changes of illumination and temperature;
the first metal tube plates and the second metal tube plates are alternately stacked and arranged, and the metal tube arrangement directions of the adjacent tube plates are mutually crossed or vertical.
Preferably, the metal mesh member comprises a metal sheet in a mesh structure and a transmission mechanism;
one end of the metal sheet is connected with the transmission mechanism, and the metal sheet moves under the driving of the transmission mechanism and is used for adjusting heat storage and limiting convection according to the change of illumination and temperature.
The heat collection method of the flat plate type heat collection system comprises the following steps:
s1, heating the gas by a flat plate type heat collector;
s2, opening a first valve and a first fan, transmitting the gas heated by the flat plate type heat collector to the heat reservoir, and enabling the gas to circularly flow between the flat plate type heat collector and the heat reservoir for a period of time;
and S3, after a period of time, opening a second valve or opening the second valve and a second fan together, transmitting hot gas from the heat reservoir to the heat output device for use, and transmitting cooling gas output by the heat output device to the heat reservoir.
Preferably, the step of heating the gas by the flat plate collector comprises:
s11, the first layer of metal net component absorbs the light heat irradiated by the glass plate;
s12, the metal net-shaped member with the second layer or more absorbs the light heat irradiated by the glass plate and the light heat irradiated by the pores of the metal net-shaped member with the upper layer;
and S13, discharging the gas in the shell from the first ventilation opening or the second ventilation opening after heating.
S14, when the light is weak and/or the temperature is low, the tube cover is closed on the metal tube, so that the pores of the metal mesh component are large;
and S15, when the light is strong and/or the temperature is high, the tube cover rotates around the rotating shaft to open a certain angle, so that the pores of the metal mesh component are small.
Preferably, the step of heating the gas by the flat plate collector comprises:
s11', the first layer of metal mesh component absorbs the heat of the light irradiated by the glass plate;
s12' the metal mesh member of the second or more layers absorbs the heat of light irradiated through the glass plate and the heat of light irradiated through the pores of the metal mesh member of the upper layer;
s13', heating the air in the shell and then exhausting the air from the first vent or the second vent;
s14', when the light is weak and/or the temperature is low, the transmission mechanism drives the metal sheet to move, so that the pores of at least two metal reticular components are coaxially arranged;
s15', when the light is strong and/or the temperature is high, the transmission mechanism drives the metal sheet to move, so that the pores of at least two metal reticular components are arranged in a non-coaxial staggered manner.
The technical scheme of the embodiment of the invention has the following advantages:
according to the flat plate type heat collecting system provided by the embodiment of the invention, the heat absorbing capacity is improved by arranging the metal mesh-shaped component of the heat collector, and the flat plate type heat collecting system has stable or adjustable heat storage and convection limitation effects, so that the photo-thermal conversion efficiency is greatly improved. And the device has simple structure, reliable work and lower cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view illustrating a specific example of a flat plate type heat collecting system according to embodiment 1 of the present invention;
FIG. 2 is a schematic three-dimensional view showing a specific example of a flat plate type heat collector in embodiment 1 of the present invention;
FIG. 3 is a front view of the flat plate collector of FIG. 2;
fig. 4 is a schematic structural view of a specific example of a metal mesh member in embodiment 2 of the present invention;
FIG. 5 is a side view of the metal mesh component of FIG. 4;
fig. 6 is a schematic structural view of a specific example of the metal mesh member in embodiment 3 of the present invention.
Reference numerals: 1-glass plate, 2-metal net-shaped component, 21-first metal tube plate, 211-metal tube, 212-tube cover, 213-rotating shaft, 22-second metal tube plate, 23-metal sheet, 24-transmission mechanism, 3-heat insulation layer, 4-shell, 5-first ventilation opening, 6-second ventilation opening, 001-flat plate type heat collector, 002-first valve, 003-first fan, 004-second valve, 005-second fan, 006-heat reservoir and 007-heat output device.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
In describing the present invention, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and/or "comprising," when used in this specification, are intended to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The term "and/or" includes any and all combinations of one or more of the associated listed items. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The present embodiment provides a flat plate type heat collecting system, as shown in fig. 1, including: the flat plate type heat collector 001, the first valve 002, the first fan 003, the second valve 004, the second fan 005, the heat reservoir 006 and the heat output device 007. The flat plate heat collectors 001 are connected in series and/or in parallel, as shown in fig. 1, two sets of three flat plate heat collectors 001 are connected in series respectively, and two sets of the flat plate heat collectors 001 connected in series are connected in parallel. The total inlet after series connection and/or parallel connection passes through pipeline and heat reservoir 006 exit linkage, and the total outlet passes through pipeline and heat reservoir 006 inlet linkage through first valve 002 and first fan 003 in proper order. The inlet of the heat outputting device 007 is connected with the outlet of the heat reservoir 006 through a pipeline, the outlet of the heat outputting device is connected with the inlet of the heat reservoir 006 through a second valve 004 through a pipeline, and the second fan 005 is connected to the two ends of the second valve 004 in parallel. The first and second fans 003, 005 accelerate the flow of the gas and guide the direction of the flow of the gas. Gas circulates among the flat plate collector 001, the heat reservoir 006, and the heat output 007.
When the flat plate type heat collector 001 works, gas is heated; the heated gas is transmitted to the heat reservoir 006 through the first valve 002 and the first fan 003, and the gas is circulated between the flat plate type heat collector 001 and the heat reservoir 006; after a period of time, the hot gas is transferred from the heat reservoir 004 to the heat output device 007 for use by a user, the cooling gas output by the heat output device 007 is transferred to the heat reservoir 004 through the second valve 004 and the second fan 003, and the gas is continuously heated by mixing the cold gas and the hot gas.
Preferably, as shown in fig. 2 and 3, the flat plate collector 001 includes: glass plate 1, metal mesh member 2, heat preservation 3, shell 4, first ventilation opening 5 and second ventilation opening 6. The glass plate 1 covers the upper part of the cavity surrounded by the shell 4 and is connected with the shell 4 in a sealing way. Preferably, the glass plate 1 is a double-layer glass plate, so that better heat preservation and insulation effects are achieved. At least two metal mesh members 2 are connected in a stacked array within the cavity for heat storage and convection limiting. Fig. 2 and 3 show three metal mesh members 2, but are not limited to three, and may be two, four, five, etc., as long as the space inside the casing allows for the selective arrangement of a larger number to improve the heat efficiency. The ends of the metal mesh members 2 are connected to the insulating layer 3. The heat preservation layer 3 is connected and located on the inner wall of the shell 4, and plays a role in heat preservation and heat insulation. The first ventilation opening 5 is arranged on a first side wall of the shell 4, the second ventilation opening 6 is arranged on a second side wall, opposite to the first side wall, of the shell 4, as shown in fig. 2 and 3, the first ventilation opening 5 is located on the right side of the front wall of the shell 4, the second ventilation opening 6 is located on the left side of the rear wall of the shell 4 and is arranged in a staggered mode, and the first ventilation opening 5 and the second ventilation opening 6 are arranged in a non-coaxial staggered mode to reduce gas convection, reduce heat loss and improve heat storage capacity. Preferably, a vent (e.g., the first vent 5) as an inlet is provided at an upper portion, and a vent (e.g., the second vent 6) as an outlet is provided at a lower portion, so as to facilitate direct discharge of the gas after being heated from the top to the bottom.
The working principle of the flat plate type heat collector is as follows: light (such as sunlight) irradiates on the first layer of metal reticular component 2 through the glass plate 1, the metal reticular component 2 absorbs heat, the temperature rises, and due to the pores between the metal reticular components 2, the light penetrates through the pores to irradiate on the second layer of metal reticular component, the third layer of metal reticular component and the like, and the heat transferred to the lower side is discharged through the vent along with the continuous increase of the radiation quantity.
Preferably, the metal mesh member 2 is a steel mesh.
Preferably, the silk thread of wire net is the hollow tube, and hollow tube is inside to be filled with endothermic liquid, and the heat-retaining ability of endothermic liquid is superior to wire net itself to light and heat conversion efficiency and heat-retaining ability have further been improved.
The flat plate type heat collecting system increases the heat absorption capacity by arranging the metal mesh component of the flat plate type heat collector, has stable heat storage and convection limiting effects, and greatly improves the photo-thermal conversion efficiency. And the device has simple structure, reliable work and lower cost.
Example 2
The present embodiment provides a flat plate type heat collecting system, which is different from embodiment 1 in that a flat plate type heat collector in the flat plate type heat collecting system includes: glass plate 1, metal mesh member 2, heat preservation 3, shell 4, first ventilation opening 5 and second ventilation opening 6. The glass plate 1 covers the upper part of the cavity surrounded by the shell 4 and is connected with the shell 4 in a sealing way. At least two metal mesh members 2 are connected in a stacked array within the cavity with adjustable heat storage and convection limiting. The insulating layer 3 is connected and positioned on the inner wall of the shell 4. The first ventilation opening 5 is arranged on a first side wall of the shell 4, the second ventilation opening 6 is arranged on a second side wall of the shell 4 opposite to the first side wall, and the first ventilation opening 5 and the second ventilation opening 6 are arranged in a non-coaxial staggered mode.
In contrast to example 1, at least two metal mesh components 2 have an adjustable heat storage and convection limiting effect.
Preferably, as shown in fig. 4 and 5, the metal mesh member 2 includes a first metal tube plate 21 and a second metal tube plate 22. The first metal tube plate 21 and the second metal tube plate 22 both comprise metal tubes 211 which are arranged in parallel, the metal tubes 211 which are arranged in parallel form a plate shape, the cross section of each metal tube 211 can be circular, square, rectangular, trapezoidal and the like, each metal tube 211 is provided with a tube cover 212, and the tube covers 212 are rotatably connected with the tube wall of each metal tube 211 through rotating shafts and used for adjusting heat storage and limiting convection according to changes of illumination and temperature. The first metal tube plates 21 and the second metal tube plates 22 are alternately stacked and arranged, and the metal tube arrangement directions of the adjacent tube plates are mutually crossed or perpendicular.
In operation, in the morning or evening, when the illumination is weak and the temperature is low, the tube cover 212 is closed on the metal tube 211, so that the pores between the metal tubes 211 are large, the downward transmission capability of light is improved, the metal mesh members of the upper and lower layers can be sufficiently irradiated by light, and the photo-thermal conversion efficiency is improved.
When in noon, the illumination is strengthened, when the temperature rises, along with the gradual strengthening of illumination, the temperature is gradually increased, the tube cover 212 can be gradually and slowly opened (the opening process is a continuous process, and does not stay in the opening process) around the rotating shaft 213 or stay for a period of time after being opened to a preset angle every time, until the angle between the tube cover and the tube cover is 180 degrees, the preset angle is set according to the actual illumination intensity and the temperature, so that the holes between the metal tubes 211 are gradually shielded and reduced, the heat convection of the gas in the shell 4 between the holes is reduced, the gas is controlled in the metal mesh component, the natural heat convection loss of the gas is inhibited, and the heat storage capacity is improved.
Example 3
The present embodiment provides a flat plate type heat collecting system, which is different from embodiment 1 in that a flat plate type heat collector in the flat plate type heat collecting system includes: glass plate 1, metal mesh member 2, heat preservation 3, shell 4, first ventilation opening 5 and second ventilation opening 6. The glass plate 1 covers the upper part of the cavity surrounded by the shell 4 and is connected with the shell 4 in a sealing way. At least two metal mesh members 2 are connected in a stacked array within the cavity with adjustable heat storage and convection limiting. The insulating layer 3 is connected and positioned on the inner wall of the shell 4. The first ventilation opening 5 is arranged on a first side wall of the shell 4, the second ventilation opening 6 is arranged on a second side wall of the shell 4 opposite to the first side wall, and the first ventilation opening 5 and the second ventilation opening 6 are arranged in a non-coaxial staggered mode.
In contrast to example 1, at least two metal mesh components 2 have an adjustable heat storage and convection limiting effect.
Preferably, as shown in fig. 6, the metal mesh member 2 includes a metal sheet 23 in a mesh structure and a transmission mechanism 24. One end of the metal sheet 23 is connected with the transmission mechanism 24, and is driven by the transmission mechanism 24 to move, so that the heat storage and convection limitation effects can be adjusted according to the change of illumination and temperature. The rib of sheetmetal 23 has certain width, compares in the wire net, and heat absorption area is bigger, and heat absorption heat-retaining ability is stronger. Preferably, the transmission mechanism is a gear and rack transmission mechanism, the lower part of the metal sheet 23 is provided with a rack structure which is meshed with the gear, and the gear rotates to drive the metal sheet to move left and right.
When the solar cell panel works, in the morning or at night, the illumination is weak, and the temperature is low, the transmission mechanism 24 drives the metal sheets 23 to move, so that the pores of at least two layers of metal sheets 23 in the net structure are coaxially arranged, the blocking to light is small, more light can be transmitted to the lower layer, the downward transmission capability of the light is improved, the metal net members of the upper layer and the lower layer can be sufficiently irradiated, and the photo-thermal conversion efficiency is improved.
When the illumination is enhanced and the temperature is increased at noon, the transmission mechanism 24 drives the metal sheets 23 to move left/right along with the gradual enhancement of the illumination and the gradual increase of the temperature, so that the metal sheets 23 with at least two layers of net structures are staggered left and right, the holes are gradually shielded and reduced, the heat convection of the gas in the shell 4 between the holes is reduced, the gas is controlled in the metal net members, the natural heat convection loss of the gas is inhibited, and the heat storage capacity is improved.
Example 4
The embodiment provides a heat collection method of a flat plate type heat collection system, which comprises the following steps:
s1, the flat plate type heat collector 001 heats the gas.
S2, the first valve 002 and the first fan 003 are turned on, so as to transfer the gas heated by the flat plate collector 001 to the heat reservoir 006, and circulate the gas between the flat plate collector 001 and the heat reservoir 006 for a period of time, so as to stabilize the temperature of the gas. The period of time can be set according to actual needs.
S3, after a period of time, the second valve 004 is opened or the second valve 004 and the second fan 005 are opened together, so as to transfer the hot gas from the heat reservoir 006 to the heat follower 007 for use, and transfer the cooling gas output by the heat follower 007 to the heat reservoir 006, so as to heat back the cooled gas.
Preferably, the step of heating the gas by the flat plate collector 001 includes:
s11, the first metal mesh member 2 absorbs the heat of the light irradiated through the glass plate 1.
S12, the metal mesh member 2 of the second or more layers absorbs the heat of the light irradiated through the glass plate 1 and the heat of the light irradiated through the pores of the metal mesh member 2 of the upper layer.
S13, the air in the shell 4 is heated and then discharged from the first ventilation opening 5 or the second ventilation opening 6.
S14, when the light is weak and/or the temperature is low, the tube cover 212 is closed on the metal tube 211, so that the pores of the metal mesh member 2 are large, the downward light transmission capability is improved, the metal mesh members of the upper and lower layers can be sufficiently irradiated by light, and the light-heat conversion efficiency is improved.
S15, when the light is strong and/or the temperature is high, the tube cover 212 rotates around the rotating shaft 213 to open a certain angle, so that the pores of the metal mesh component 2 are small, the heat convection of the gas in the shell 4 between the gaps is reduced, the gas is controlled in the metal mesh component, the natural heat convection loss of the gas is inhibited, and the heat storage capacity is improved.
Alternatively, preferably, the step of heating the gas by the flat plate collector 001 comprises:
s11', the first metal mesh member 2 absorbs heat of light irradiated through the glass plate 1.
S12' the metal mesh member 2 of the second or higher layer absorbs the heat of the light irradiated through the glass plate 1 and the heat of the light irradiated through the pores of the metal mesh member 2 of the upper layer.
S13', the air in the shell 4 is heated and then discharged from the first ventilation opening 5 or the second ventilation opening 6.
S14', when the illumination is weak and/or the temperature is low, the transmission mechanism 24 drives the metal sheet 23 to move, so that the pores of at least two metal reticular components 2 are coaxially arranged, the blocking to the light is small, more light can be transmitted to the lower layer, the capability of downward transmission of the light is improved, the metal reticular components of the upper layer and the lower layer can be fully irradiated by the light, and the photo-thermal conversion efficiency is improved.
S15', when the illumination is stronger and/or the temperature is higher, the transmission mechanism 24 drives the metal sheet 23 to move, so that the pores of at least two metal mesh components 2 are arranged in a non-coaxial staggered manner, the gap is reduced, the convective heat transfer of the gas in the shell 4 between the gaps is reduced, and the gas is controlled in the metal mesh components, thereby inhibiting the natural convective heat loss of the gas and improving the heat storage capacity.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A flat plate heat collecting system, comprising: the heat collector comprises a flat plate type heat collector (001), a first valve (002), a first fan (003), a second valve (004), a second fan (005), a heat reservoir (006) and a heat output device (007);
the flat plate type heat collectors (001) are connected in series and/or in parallel, a total inlet after the series connection and/or the parallel connection is connected with an outlet of the heat reservoir (006) through a pipeline, and a total outlet is connected with an inlet of the heat reservoir (006) through a first valve (002) and a first fan (003) in sequence;
the inlet of the heat output device (007) is connected with the outlet of the heat reservoir (006) through a pipeline, the outlet of the heat output device is connected with the inlet of the heat reservoir (006) through a second valve (004) through a pipeline, and the second fan (005) is connected to the two ends of the second valve (004) in parallel.
2. A flat plate heat collector system according to claim 1, wherein the flat plate heat collector (001) comprises: the air-permeable heat-insulating glass plate comprises a glass plate (1), a metal mesh component (2), a heat-insulating layer (3), a shell (4), a first ventilation opening (5) and a second ventilation opening (6);
the glass plate (1) covers the upper part of a cavity enclosed by the shell (4) and is connected with the shell (4) in a sealing way;
at least two metal reticular components (2) are connected in the cavity in a laminated array mode and have the functions of heat storage and convection limitation;
the heat-insulating layer (3) is connected and positioned on the inner wall of the shell (4);
the first ventilation opening (5) is arranged on a first side wall of the shell (4), the second ventilation opening (6) is arranged on a second side wall, opposite to the first side wall, of the shell (4), and the first ventilation opening (5) and the second ventilation opening (6) are arranged in a non-coaxial staggered mode.
3. A flat plate heat collecting system according to claim 2, wherein the metal mesh member (2) is a steel mesh.
4. A flat plate type heat collecting system according to claim 3, wherein the wire of the wire mesh is a hollow tube, and the inside of the hollow tube is filled with heat absorbing liquid.
5. A flat plate heat collector system according to claim 1, wherein the flat plate heat collector (001) comprises: the air-permeable heat-insulating glass plate comprises a glass plate (1), a metal mesh component (2), a heat-insulating layer (3), a shell (4), a first ventilation opening (5) and a second ventilation opening (6);
the glass plate (1) covers the upper part of a cavity enclosed by the shell (4) and is connected with the shell (4) in a sealing way;
at least two metal mesh members (2) are connected in a stacked array inside the cavity, with adjustable heat storage and convection limiting effects;
the heat-insulating layer (3) is connected and positioned on the inner wall of the shell (4);
the first ventilation opening (5) is arranged on a first side wall of the shell (4), the second ventilation opening (6) is arranged on a second side wall, opposite to the first side wall, of the shell (4), and the first ventilation opening (5) and the second ventilation opening (6) are arranged in a non-coaxial staggered mode.
6. A flat plate heat collecting system according to claim 5, wherein the metal mesh member (2) comprises a first metal tube plate (21) and a second metal tube plate (22);
the first metal tube plate (21) and the second metal tube plate (22) respectively comprise metal tubes (211) which are arranged in parallel, the metal tubes (211) which are arranged in parallel form a plate shape, each metal tube (211) is provided with a tube cover (212), and the tube covers (212) are rotatably connected with the tube walls of the metal tubes (211) through rotating shafts and used for adjusting heat storage and limiting convection according to changes of illumination and temperature;
the first metal tube plates (21) and the second metal tube plates (22) are alternately stacked and arranged, and the metal tube arrangement directions of the adjacent tube plates are mutually crossed or vertical.
7. A flat plate heat collecting system according to claim 5, wherein the metal mesh member (2) comprises a metal sheet (23) having a mesh structure and a transmission mechanism (24);
one end of the metal sheet (23) is connected with the transmission mechanism (24) and moves under the drive of the transmission mechanism (24) so as to adjust the heat storage and limit the convection action according to the change of illumination and temperature.
8. A heat collection method of a flat plate type heat collection system is characterized by comprising the following steps:
s1, heating the gas by a flat plate type heat collector (001);
s2, a first valve (002) and a first fan (003) are started, gas heated by the flat plate type heat collector (001) is transmitted to the heat reservoir (006), and the gas circularly flows between the flat plate type heat collector (001) and the heat reservoir (006) for a period of time;
and S3, after a period of time, opening a second valve (004) or opening the second valve (004) and a second fan (005) together, transmitting the hot gas from the heat reservoir (006) to the heat exporter (007) for use, and transmitting the cooling gas output by the heat exporter (007) to the heat reservoir (006).
9. The heat collecting method as claimed in claim 8, wherein the step of heating the gas by the flat plate collector (001) comprises:
s11, the first layer of metal net-shaped component (2) absorbs the heat of the light irradiated by the glass plate (1);
s12, the metal net-shaped member (2) with more than the second layer absorbs the light heat irradiated by the glass plate (1) and the light heat irradiated by the pores of the metal net-shaped member (2) with the upper layer;
s13, heating the air in the shell (4) and then discharging the air from the first ventilation opening (5) or the second ventilation opening (6);
s14, when the light is weak and/or the temperature is low, the tube cover (212) is closed on the metal tube (211) to make the pores of the metal mesh component (2) larger;
s15, when the light is strong and/or the temperature is high, the tube cover (212) rotates around the rotating shaft (213) to open a certain angle, so that the pores of the metal mesh component (2) are smaller.
10. The heat collecting method as claimed in claim 8, wherein the step of heating the gas by the flat plate collector (001) comprises:
s11', the first layer of metal reticular component (2) absorbs the light heat irradiated by the glass plate (1);
s12', the metal net member (2) of the second layer or more absorbs the light heat irradiated by the glass plate (1) and the light heat irradiated by the pores of the metal net member (2) of the upper layer;
s13', heating the air in the shell (4) and then discharging the air from the first ventilation opening (5) or the second ventilation opening (6);
s14', when the light is weak and/or the temperature is low, the transmission mechanism (24) drives the metal sheet (23) to move, so that the pores of at least two metal reticular components (2) are coaxially arranged;
s15', when the light is strong and/or the temperature is high, the transmission mechanism (24) drives the metal sheet (23) to move, so that the pores of at least two metal reticular components (2) are arranged in a non-coaxial staggered manner.
CN201910663715.8A 2019-07-22 2019-07-22 Flat plate type heat collection system and heat collection method Pending CN110631264A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111550865A (en) * 2020-04-23 2020-08-18 山东财经大学 Solar heat collection system and leakage detection method
CN111692766A (en) * 2020-05-06 2020-09-22 山东财经大学 Cloud remote monitoring solar heat collection system and leakage detection method

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201059798Y (en) * 2007-06-06 2008-05-14 喜春野 Building flat-plate shape split wall hanging vacuum solar energy superconductivity heat collection device
JP2008157483A (en) * 2006-12-21 2008-07-10 Kenji Umetsu Photovoltaic heat pump system
CN201407835Y (en) * 2009-05-21 2010-02-17 上海恩阳太阳能技术有限公司 Flat solar heat-collecting circulating system
CN101893333A (en) * 2009-05-21 2010-11-24 上海恩阳太阳能技术有限公司 Flat panel solar heat collecting and circulating system
CN102415606A (en) * 2011-11-23 2012-04-18 四季沐歌(洛阳)太阳能有限公司 Heat supply system for curing tobacco at three sections with solar energy
CN103075814A (en) * 2013-01-28 2013-05-01 山西明浩锦达新能源有限公司 Novel solar heat collector with net wires
CN103574916A (en) * 2013-11-29 2014-02-12 兰州理工大学 Multi-medium solar heat collection auxiliary heat pump system
CN104930729A (en) * 2015-06-26 2015-09-23 甘肃省建材科研设计院 Solar middle temperature hot air system storing heat by means of phase-change materials
CN106152562A (en) * 2015-03-30 2016-11-23 秦三根 A kind of phase-transition heat-storage, efficiently take pattern of fever solar water and heating system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008157483A (en) * 2006-12-21 2008-07-10 Kenji Umetsu Photovoltaic heat pump system
CN201059798Y (en) * 2007-06-06 2008-05-14 喜春野 Building flat-plate shape split wall hanging vacuum solar energy superconductivity heat collection device
CN201407835Y (en) * 2009-05-21 2010-02-17 上海恩阳太阳能技术有限公司 Flat solar heat-collecting circulating system
CN101893333A (en) * 2009-05-21 2010-11-24 上海恩阳太阳能技术有限公司 Flat panel solar heat collecting and circulating system
CN102415606A (en) * 2011-11-23 2012-04-18 四季沐歌(洛阳)太阳能有限公司 Heat supply system for curing tobacco at three sections with solar energy
CN103075814A (en) * 2013-01-28 2013-05-01 山西明浩锦达新能源有限公司 Novel solar heat collector with net wires
CN103574916A (en) * 2013-11-29 2014-02-12 兰州理工大学 Multi-medium solar heat collection auxiliary heat pump system
CN106152562A (en) * 2015-03-30 2016-11-23 秦三根 A kind of phase-transition heat-storage, efficiently take pattern of fever solar water and heating system
CN104930729A (en) * 2015-06-26 2015-09-23 甘肃省建材科研设计院 Solar middle temperature hot air system storing heat by means of phase-change materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111550865A (en) * 2020-04-23 2020-08-18 山东财经大学 Solar heat collection system and leakage detection method
CN111692766A (en) * 2020-05-06 2020-09-22 山东财经大学 Cloud remote monitoring solar heat collection system and leakage detection method
CN111692766B (en) * 2020-05-06 2021-03-23 山东财经大学 Cloud remote monitoring solar heat collection system and leakage detection method

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