CN110307655A - A kind of salt gradient solar pond experimental method and device - Google Patents
A kind of salt gradient solar pond experimental method and device Download PDFInfo
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- CN110307655A CN110307655A CN201910691949.3A CN201910691949A CN110307655A CN 110307655 A CN110307655 A CN 110307655A CN 201910691949 A CN201910691949 A CN 201910691949A CN 110307655 A CN110307655 A CN 110307655A
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- salt gradient
- solar pond
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- side wall
- gradient solar
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/90—Arrangements for testing solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/10—Arrangements for storing heat collected by solar heat collectors using latent heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/10—Details of absorbing elements characterised by the absorbing material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/20—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption
- F24S70/225—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption for spectrally selective absorption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/60—Details of absorbing elements characterised by the structure or construction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Building Environments (AREA)
Abstract
The invention patent relates to a kind of not by side wall surface shadow effect and has a high proportion of salt gradient solar pond experimental method of reasonable length and width and device.The frame of salt gradient sun pool device uses metal structure in the present invention, the outer layer and internal layer of its four side wall surfaces are made of transmissivity and all higher resistant material of intensity, certain vacuum degree is taken out between two-ply, or fills the inert gases such as clean air or nitrogen.Bottom surface is made of stainless steel plate, insulating layer and stainless steel plate with selective coating from top to bottom.The invention patent effectively reduces salt gradient solar pond heat and passes through scattering and disappearing in side wall Environment Oriented, simultaneously, reasonable salt gradient solar pond length, width and height geometric dimension ratio is provided, the generation of middle layer convection current of the level due to salt gradient solar pond experimental provision with height ratio caused by unreasonable is effectively avoided.
Description
Technical field
The invention patent relates to a kind of salt gradient sun pool technologies, more particularly to one kind is not by side wall surface shadow effect and tool
There are a high proportion of salt gradient solar pond experimental method of reasonable length and width and device.
Background technique
Salt gradient solar pond, which is one, has salinity is gradually increased from top to bottom brine pit, it be one kind have both absorption and
Store the Solar use mode of solar radiation.According to the difference of salinity, mainly by up of three-layer, top layer is higher troposphere,
This layer relatively thin, and generally fresh water or light salt brine composition, middle layer is made of the salt water that salinity from top to bottom gradually increases, and the layer is again
Referred to as salt gradient layer, lowest level are lower troposphere, this layer is made of the strong brine of even concentration.Its working principle is: irradiation
Solar radiation to higher troposphere surface passes through higher troposphere and middle layer reaches lower troposphere, by the strong brine in lower troposphere
It absorbs, is converted to heat storage and gets off, since middle layer has the density gradient from top to bottom gradually increased, this density gradient
Convection action caused by the tropospheric temperature difference up and down is inhibited, therefore middle layer does not generate convection current, the heat in lower troposphere is only
It can be communicated up by way of heat transfer, and since the thermal coefficient of water is lower, middle layer is thicker in addition, therefore lower troposphere is logical
It is less to cross the upward thermal loss of middle layer, to outwardly provide heat storage to heat in lower troposphere.
Often area is larger for the salt gradient solar pond of actual motion, and depth is smaller, therefore side wall exists to the barrier of solar radiation
The shadow effects generated in pond can be ignored, but when carrying out the experiment of salt gradient solar pond, due to the general ruler of experimental provision
Very little smaller, often in length, width and height generally at 1 meter or so, the shade of side wall surface is to the shadow for entering solar radiation in pond in this case
Sound is relatively large, and it is bad to often lead to experiment effect；On the other hand, from the angle of dynamic stability, to guarantee middle layer shape
At stable non-convection system, avoid this layer that convection current volume Xi Zuoyong occurs from geometric dimension, middle layer there should be certain water
Gentle height ratio.The above problem is unresolved in existing salt gradient solar pond research, leads to existing small-sized salt
The experiment of gradient solar pond often differs larger with actual conditions.
Summary of the invention
The present invention proposes that a kind of salt gradient solar pond is real for the above problem present in salt gradient solar pond experimental study
Test method and device.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of salt gradient solar pond experimental method, it is characterised in that: the side wall surface 9 of salt gradient solar pond 1 is higher by transmissivity
Material composition, and side wall surface 9 has the structure of two layers of transparent material intermediate hollow, frame 8 is used to fix the side wall of double-layer structure
Face 9, higher troposphere 5 be fresh water or light salt brine, with a thickness ofl ucz, middle layer 6 be salt gradient layer, it is assumed that its with a thickness ofl ncz,
Lower troposphere 7 is strong brine, with a thickness ofl lcz, the height 2 of salt gradient solar pond 1 ish, andh=l ucz+ +l lcz, salt gradient is too
The width 3 in positive pond 1 isa, the length 4 of salt gradient solar pond 1 isb, then the geometric dimension of salt gradient solar pond 1 meets following pass
System: a >=2.1298 l ncz And b >=2.1298 l ncz ；The upper layer of bottom surface 10 is the selective coating with absorptivity close to 1；
A kind of salt gradient solar pond experimental method, working principle are: solar radiation passes through the upper convection current of salt gradient solar pond 1
5 water surface of layer are directly incident in the water of salt gradient solar pond 1；Solar radiation from side is entered by transparent side wall surface 9
It is mapped in the water of salt gradient solar pond 1, falls on bottom surface 10, thus, all solar radiations from upper surface and side can
Enough effectively to be absorbed by bottom surface 10, solar radiation is converted to strong brine quilt of the heat storage in lower troposphere 7, in lower troposphere 7
Heat from bottom surface 10 generates free convection, and middle layer 6 is the salt gradient layer that salinity gradually increases from top to bottom,
Top is higher troposphere 5 of the temperature close to environment temperature, and bottom is the higher lower troposphere 7 of temperature, which is produced
The trend of raw thermal convection density gradient caused by salt gradient that middle layer 6 gradually increases from top to bottom inhibits, therefore
Guarantee not generate convection current in middle layer 6, the heat in lower troposphere 7 can only be by thermally conductive mode to upper layer in middle layer 6
Transmitting, spatially to guarantee that middle layer 6 forms stable non-convection system, the length 4 and width 3 of salt gradient solar pond 1 are all
Not less than 2.1298 times of 6 thickness of middle layer.
A kind of salt gradient sun pool device, structure feature are: salt gradient solar pond 1 is the open cuboid in upper surface
Structure, frame 8 with heat-blocking action metal structure by forming, and four side wall surfaces 9 are from the outside to the core by 11 hollow layer 13 of outer layer
And internal layer 12 forms, bottom surface 10 is made of stainless steel plate, insulating layer and stainless steel plate with selective coating from top to bottom.
Further, the frame 8 of the salt gradient solar pond 1 can use bridge cut-off constructed of aluminium, to reduce the salt gradient sun
Heat loss in pond 1.
Further, the outer layer 11 and internal layer 12 of the side wall surface 9 of the salt gradient solar pond 1 can be using light transmittances and strong
All higher high-boron-silicon glass is spent, to reduce influence of the side wall shade to the solar radiation being incident in salt gradient solar pond 1.
Further, the hollow layer 13 of the side wall surface 9 can be air, nitrogen or vacuumize, to reduce salt gradient too
Heat in positive pond 1 is scattered and disappeared by side wall surface 9.
The invention patent the utility model has the advantages that
1, side wall surface 9 is overcome using the higher material composition of light transmittance since 1 experimental provision size of salt gradient solar pond is smaller
The influence of generated side wall shade.
2, side wall surface 9 is made of two layers of transparent panel and hollow layer 13, and hollow layer 13 is gas or Vacuuming structure, is effectively subtracted
Weak 1 heat of salt gradient solar pond scattering and disappearing into environment by side wall surface 9.
3, from dynamic stability angle, reasonable 1 length, width and height geometric dimension ratio of salt gradient solar pond is provided, is effectively avoided
The generation of 6 convection current of middle layer due to the horizontal of 1 experimental provision of salt gradient solar pond and caused by 2 ratios of height are unreasonable.
4, the sun spoke for reaching 1 bottom surface 10 of salt gradient solar pond is effectively ensured in 10 structure of bottom surface with selective coating
It penetrates and is fully absorbed by salt gradient solar pond 1.
Detailed description of the invention
Fig. 1 is the invention patent overall appearance figure.
Fig. 2 is 9 structural schematic diagram of A-A cross section sidewall face in Fig. 1.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing, the present invention is made into one
Step ground detailed description.
The frame 8 of 1 device of salt gradient solar pond uses bridge cut-off constructed of aluminium, the outer layer 11 and internal layer 12 of four side wall surfaces 9
It is made of all higher corrosion-resistant high-boron-silicon glass of transmissivity and intensity, takes out certain vacuum between two layers of high-boron-silicon glass plate
Degree, or fill the inert gases such as clean air or nitrogen.Bottom surface 10 is from top to bottom by the stainless steel with selective coating
Plate, insulating layer and stainless steel plate composition.
In terms of geometric dimension, with the following method: assuming that middle layer 6 with a thickness of 0.5 meter, then salt gradient solar pond 1
Length 4 and width 3 should all be no less than 0.5 × 2.1299=1.0649 meters, the lower perfusion of troposphere 7 is with a thickness of 0.5 meter of dense salt
Water；The salt water that salinity gradually decreases to 0 is successively perfused in middle layer 6 from below to up, forms the salt gradient layer of 0.5 meter of thickness, specifically
Middle layer 6 slowly is perfused with by diffuser using the salt water of pre-configured concentration in method；Finally, being perfused using diffuser
The fresh water of 0.1 meter of thickness constitutes higher troposphere 5.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (5)
1. a kind of salt gradient solar pond experimental method, it is characterised in that: the side wall surface (9) of salt gradient solar pond (1) is by transmissivity
Higher material composition, and side wall surface (9) has the structure of two layers of transparent material intermediate hollow, frame (8) is for fixed double-deck
The side wall surface (9) of structure, higher troposphere (5) be fresh water or light salt brine, with a thickness ofl ucz, middle layer (6) is salt gradient layer,
Assuming that its with a thickness ofl ncz, lower troposphere (7) is strong brine, with a thickness ofl lcz, the height (2) of salt gradient solar pond (1) ish,
Andh=l ucz+ l ncz +l lcz, the width (3) of salt gradient solar pond (1) isa, the length (4) of salt gradient solar pond (1) isb, then
The geometric dimension of salt gradient solar pond (1) meets following relationship:a≥2.1298×l nczAndb≥2.1298×l ncz；Bottom surface
(10) upper layer is the selective coating with absorptivity close to 1；
A kind of salt gradient solar pond experimental method, working principle are: solar radiation is upper right by salt gradient solar pond (1)
Fluid layer (5) water surface is directly incident in the water of salt gradient solar pond (1)；Solar radiation from side passes through transparent side wall
Face (9) is incident in the water of salt gradient solar pond (1), is fallen on bottom surface (10), thus, from upper surface and side it is all too
Sun radiation can effectively be absorbed by bottom surface (10), and solar radiation is converted to heat storage in lower troposphere (7), lower troposphere
(7) strong brine in is come from the heat of bottom surface (10), generates free convection, middle layer (6) be salinity from top to bottom by
Gradually increased salt gradient layer, top are higher troposphere (5) of the temperature close to environment temperature, and bottom is that temperature is higher lower right
The trend of fluid layer (7), thermal convection caused by the upper and lower temperature difference is produced by the salt gradient that middle layer (6) gradually increases from top to bottom
Raw density gradient is inhibited, therefore guarantees not generate convection current in middle layer (6), and the heat in lower troposphere (7) is in middle layer
It (6) can only be by thermally conductive mode to upper layer transfers, spatially to guarantee that middle layer (6) form stable non-convection system in
System, the length (4) and width (3) of salt gradient solar pond (1) are all not less than 2.1298 times of middle layer (6) thickness.
2. a kind of salt gradient solar pond experimental provision, structure feature are: salt gradient solar pond (1) is the open length in upper surface
Cube structure, frame (8) are made of the metal structure with heat-blocking action, and four side wall surfaces (9) are from the outside to the core by outer layer
(11) hollow layer (13) and internal layer (12) composition, bottom surface (10) are from top to bottom by the stainless steel plate with selective coating, heat preservation
Layer and stainless steel plate are constituted.
3. according to claim 1 with a kind of salt gradient solar pond experimental method as claimed in claim 2 and device, the salt gradient sun
The frame (8) in pond (1) can use bridge cut-off constructed of aluminium, to reduce the heat loss in salt gradient solar pond (1).
4. according to claim 1 with a kind of salt gradient solar pond experimental method as claimed in claim 2 and device, the salt gradient sun
The outer layer (11) and internal layer (12) of the side wall surface (9) in pond (1) can use light transmittance and all higher high-boron-silicon glass of intensity, with
Reduce influence of the side wall shade to the solar radiation being incident in salt gradient solar pond (1).
5. according to claim 1 with a kind of salt gradient solar pond experimental method as claimed in claim 2 and device, side wall surface (9)
Hollow layer (13) side wall surface can be passed through to reduce the heat in salt gradient solar pond (1) air, nitrogen or to vacuumize
(9) it scatters and disappears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910691949.3A CN110307655A (en) | 2019-07-30 | 2019-07-30 | A kind of salt gradient solar pond experimental method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910691949.3A CN110307655A (en) | 2019-07-30 | 2019-07-30 | A kind of salt gradient solar pond experimental method and device |
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| Publication Number | Publication Date |
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| CN110307655A true CN110307655A (en) | 2019-10-08 |
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| CN201910691949.3A Pending CN110307655A (en) | 2019-07-30 | 2019-07-30 | A kind of salt gradient solar pond experimental method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654248A (en) * | 2021-08-16 | 2021-11-16 | 燕山大学 | Salt gradient solar pond with automatic light capturing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103371070A (en) * | 2012-04-23 | 2013-10-30 | 喜诺克斯株式会社 | Solar heat utilizing planter |
| CN105588345A (en) * | 2014-11-17 | 2016-05-18 | 河南理工大学 | Salt gradient solar pond technology for accumulating heat by using latent heat |
-
2019
- 2019-07-30 CN CN201910691949.3A patent/CN110307655A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103371070A (en) * | 2012-04-23 | 2013-10-30 | 喜诺克斯株式会社 | Solar heat utilizing planter |
| CN105588345A (en) * | 2014-11-17 | 2016-05-18 | 河南理工大学 | Salt gradient solar pond technology for accumulating heat by using latent heat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654248A (en) * | 2021-08-16 | 2021-11-16 | 燕山大学 | Salt gradient solar pond with automatic light capturing device |
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