CN108332438B - A kind of method and apparatus that the self-loopa of salt gradient solar pond proposes heat - Google Patents
A kind of method and apparatus that the self-loopa of salt gradient solar pond proposes heat Download PDFInfo
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- CN108332438B CN108332438B CN201810008444.8A CN201810008444A CN108332438B CN 108332438 B CN108332438 B CN 108332438B CN 201810008444 A CN201810008444 A CN 201810008444A CN 108332438 B CN108332438 B CN 108332438B
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- heat
- discharge device
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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
Abstract
The invention patent relates to the method and apparatus that salt gradient solar pond thermal extraction technical field more particularly to a kind of salt gradient solar pond self-loopa propose heat.It is characterized in that, circulation canal one end is connected with troposphere under salt gradient solar pond, under the driving of density contrast of the hot salt brine caused by the temperature difference, it flows into the hot charge and discharge device for being located at the circulation canal other end, salt water heat release in hot charge and discharge device, temperature reduce, and density increases, therefore the cool brine after heat release flows back to the lower troposphere of salt gradient solar pond along circulation canal bottom, so that completing self-loopa proposes heat；Heat exchanger is set in hot charge and discharge device, and the cold fluid inlet for user's heat extraction and the hot fluid outlet ports after heat exchange are set, so that the heat in hot charge and discharge device is constantly supplied to user.
Description
Technical field
The present invention relates to salt gradient solar pond thermal extraction technical fields more particularly to a kind of salt gradient solar pond self-loopa to mention
The method and apparatus of heat.
Background technique
With the problems such as fossil energy is consumed by a large amount of exploitations, this problem of shortage of resources is more and more prominent, environmental pollution
Also it is constantly suggested.Solar energy has many advantages, such as rich reserves as a kind of renewable energy, pollution-free.Salt gradient solar pond
It is a kind of Solar use mode for integrating and absorbing and storing solar energy, by higher troposphere, non-convection layer and lower troposphere
It constitutes, wherein higher troposphere is fresh water aquifer, and non-convection layer salinity change in gradient, and the density gradient as caused by concentration difference can be with
Inhibit the free convection because of caused by temperature difference, the high salt water of bottom temp will not float, and thermal convection can be effectively suppressed in this way, rise
To the effect of heat preservation, lower troposphere is reservoir, is made of strong brine, the solar energy into salt pond is changed into thermal energy storage under
In troposphere.Salt gradient solar pond has many problems to have as using a kind of form of solar energy although having many good qualities
It is to be solved.For large area solar pond, although total quantity of heat storage is big, the extraction of heat and using there is also much not
Foot, solar pond mentions hot mode mainly and has and directly proposes thermal method and propose thermal method indirectly at present, both modes have shortcoming.Directly
It connects and mentions tropospheric strong brine under thermal method directly extracts and exchange heat, this is very big to the disturbance of solar pond gradient layer.Heat is proposed indirectly
Method is that internal exchanger is arranged in salt gradient solar pond reservoir, and heat is transmitted to outside salt gradient solar pond by internal exchanger
Portion, this method cost is high, troublesome maintenance, and is only applicable to middle-size and small-size solar pond, and efficiency of heating- utilization is low.
Summary of the invention
In conclusion providing a kind of salt gradient solar pond self-loopa the purpose of the present invention is being directed to above situation and proposing heat
Method and apparatus, this method and device carry out heat transfer free convection and circulation using the temperature difference as circulation power under action of thermal difference,
Reach a kind of and continuously propose heat, stablizes the purpose of circulation, overcome the deficiency of present salt gradient solar pond heat extraction technology, and have
Have and continuously propose heat, small, the advantages that efficiency of heating- utilization is high is disturbed to solar pond.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of method that the self-loopa of salt gradient solar pond proposes heat:
This method includes salt gradient solar pond 1 and self-loopa proposes thermal modules, and self-loopa proposes thermal modules by 6 He of circulation canal
Hot charge and discharge device 8 forms, and hot charge and discharge device 8 is internally provided with phase-transition heat-storage unit 9 and heat exchanger 11, the circulation canal 6
The interface being connected with hot charge and discharge device 8 should be higher than that the interface that circulation canal 6 is connected with lower troposphere 4, i.e., circulation canal 6 is by oblique
Upwardly direction arranges that the liquid level in hot charge and discharge device 8 is lower than 1 upper surface of salt gradient solar pond；Wherein, by salt gradient solar pond
1 heat for absorbing and storing passes to hot charge and discharge device 8 by circulation canal 6, and passes through the heat exchanger 11 in hot charge and discharge device 8
Heat is constantly extracted, so that constituting self-loopa mentions hot systems.
Further, the working principle of this method is: the lower troposphere 4 of salt gradient solar pond 1 is logical with brine recycling
Road 6 under the driving of density contrast of the hot salt brine caused by the temperature difference, flows into the hot charge and discharge device 8 for being located at 6 other end of circulation canal
In, the heat release in hot charge and discharge device 8, temperature reduces, and density increases, therefore the cool brine after heat release is flowed back to along 6 bottom of circulation canal
The lower troposphere 4 of salt gradient solar pond 1, so in cycles, the salt water in lower troposphere 4 is with the side of heat transfer free convection
Formula brings heat in hot charge and discharge device 8 into, from salt gradient solar pond 1 constantly to realize the heat extraction of salt gradient solar pond 1.
Further, the hot charge and discharge device 8 increases thermmal storage density by phase change heat storage material, and has and mention to user
The heat exchange function of heating load.
Further, the liquid level in the hot charge and discharge device 8 can pass through free space 10 in hot charge and discharge device 8
Gas pressure is adjusted.
A kind of salt gradient solar pond self-loopa mentions the device of heat:
Circulation canal 6,6 one end of circulation canal and the salt gradient sun is arranged in lower 4 side wall of troposphere of salt gradient solar pond 1
The lower troposphere 4 in pond 1 is connected, and one end is connected with hot charge and discharge device 8, so that hot charge and discharge device 8 passes through circulation canal 6 and salt gradient
Solar pond 1 forms the salt water free air space communicated.Gas pipeline 13 is provided at the top of hot charge and discharge device 8, on gas pipeline 13
It is provided with valve 12,13 one end of gas pipeline is connected with the free space 10 in hot charge and discharge device 8, the other end and gas pressure
Controller 14 is connected.
Further, the salt gradient solar pond self-loopa proposes heat and refers under salt gradient solar pond 1 in troposphere 4
Hot salt brine is flowed into hot charge and discharge device 8 under the action of density contrast by circulation canal 6, and heat is discharged in hot charge and discharge device 8
Amount, the cool brine after temperature reduces flows into lower troposphere 4 along circulation canal 6 again, to realize heat constantly from lower right
Fluid layer 4 is transmitted in hot charge and discharge device 8.
It further, is the free space 10 with certain gas, the free space 10 at the top of the hot charge and discharge device 8
Wall surface be connected with gas pipeline 13, valve 12, the other end of gas pipeline 13 and pressure control are set on gas pipeline 13
Device 14 processed is connected, and pressure controller 14 is used to control the pressure of free space 10 in hot charge and discharge device 8, to control hot charge and discharge
Liquid level in device 8.
Further, phase-transition heat-storage unit 9 is added in hot 8 bottom of charge and discharge device, the phase-transition heat-storage unit 9 be equipped with
The solid encapsulation structure of phase-change heat-storage material.
Further, grid 7 is arranged in the interface that the circulation canal 6 is connected with hot charge and discharge device 8, to prevent heat from filling
The phase-transition heat-storage unit 9 put in device 8 flows into circulation canal 6.
Further, heat exchanger 11 is set in the hot charge and discharge device 8, and the cold flow for being used for user's heat extraction is set
Hot fluid outlet ports 16 after body import 15 and heat exchange, so that the heat in hot charge and discharge device 8 is constantly supplied to user.
This method and device overcome the deficiency for directly proposing thermal method and proposing thermal method indirectly, and inherit existing heat exchange mode
Advantage, heat exchange efficiency is high, disturbs to salt gradient solar pond small.
The invention patent the utility model has the advantages that
1. salt gradient solar pond self-loopa provided by the invention patent proposes hot method caused by the temperature difference of salt water itself
Free convection be driving force, heat extraction is come out, to 1 gradient layer stability influence very little of salt gradient solar pond.
2. the salt gradient solar pond self-loopa that the invention patent provides proposes hot method caused by the temperature difference of salt water itself
Free convection is driving force, transfers heat to external hot charge and discharge device 8, is not required to that interior displacement is arranged in salt gradient solar pond 1
Hot device, cost is few, easy to maintain, is not necessarily to external impetus.
3. the method and apparatus that a kind of salt gradient solar pond self-loopa that the invention patent provides proposes heat, hot charge and discharge device 8
Heat can be stored with high-energy density, and released during thermal extraction by middle setting phase-transition heat-storage unit 9.
4. the method and apparatus that a kind of salt gradient solar pond self-loopa that the invention patent provides proposes heat, hot charge and discharge device 8
In liquid level can be adjusted by the gas pressure of free space 10 in hot charge and discharge device 8, to control solar pond
In thermal extraction amount, achieve the purpose that control self-loopa propose heat.
It is arranged in hot charge and discharge device 8 described in hot method 5. the salt gradient solar pond self-loopa that the invention patent provides mentions
There are user's cold fluid inlet 15 and hot fluid outlet ports 16, can be realized by heat exchanger 11 and give user's continuous-stable heat supply.
Detailed description of the invention
Fig. 1 is the schematic diagram of the method for the present invention.
Fig. 2 is the schematic diagram of apparatus of the present invention.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail.
As shown in Figure 1, 2, this method includes salt gradient solar pond 1 and self-loopa proposes thermal modules, self-loopa mention thermal modules by
Circulation canal 6 and hot charge and discharge device 8 form, and phase-transition heat-storage unit 9 and heat exchanger 11 are arranged inside hot charge and discharge device 8, and circulation is logical
The interface that road 6 is connected with hot charge and discharge device 8 should be higher than that the interface that circulation canal 6 is connected with lower troposphere 4, i.e. circulation canal 6
By direction arrangement obliquely, the liquid level in hot charge and discharge device 8 is lower than 1 upper surface of salt gradient solar pond；In salt gradient solar pond
1 lower troposphere 4 is provided with brine recycling channel 6, and under the driving of density contrast of the hot salt brine caused by the temperature difference, inflow is located at
In the hot charge and discharge device 8 of 6 other end of circulation canal, the heat release in hot charge and discharge device 8, temperature is reduced, and density increases, therefore after heat release
Cool brine the lower troposphere 4 of salt gradient solar pond 1, so in cycles, lower convection current are flowed back to along 6 bottom of circulation canal
4 salt water of layer are constantly brought heat in hot charge and discharge device 8 into a manner of heat transfer free convection from salt gradient solar pond 1, and are led to
Heat exchanger 11 in overheat charge and discharge device 8 constantly extracts heat, so that constituting self-loopa mentions hot systems, realizes salt ladder
Spend the thermal extraction of solar pond 1.
As shown in Fig. 2, the course of work of the device is as follows: solar radiant energy enters the salt gradient sun by higher troposphere 2
Pond 1 is lost to a part of heat in environment in non-convection layer 3 by thermally conductive, and remaining solar radiant energy is transformed into thermal energy and exists
It is stored in lower troposphere 4, wherein non-convection layer 3 plays the role of insulating layer, porous with being arranged in troposphere 4 at present
Dielectric layer 5, porous media not only has good heating conduction and biggish specific heat capacity, also with accumulation of heat in certain time
Effect, to enhance the heat accumulation mean temperature of solar pond and effectively inhibit the salt diffusion phenomena of salt gradient solar pond 1.Lower convection current
Circulation canal 6 is arranged in 4 side wall of layer, and 6 one end of circulation canal is connected with the lower troposphere 4 of salt gradient solar pond 1, one end and heat
Charge and discharge device 8 is connected, so that hot charge and discharge device 8 forms the salt water communicated circulation sky with salt gradient solar pond 1 by circulation canal 6
Between.It is provided with gas pipeline 13 at the top of hot charge and discharge device 8, valve 12,13 one end of gas pipeline are provided on gas pipeline 13
It is connected with the free space 10 in hot charge and discharge device 8, the other end is connected with gas pressure regulator 14, and pressure controller 14 is used
In the gas pressure for controlling free space 10 in hot charge and discharge device 8, so that the liquid level in hot charge and discharge device 8 is controlled, to control
Thermal extraction amount in solar pond processed achievees the purpose that controlling self-loopa proposes heat.Meanwhile hot 8 bottom of charge and discharge device addition is equipped with phase
The phase-transition heat-storage unit 9 of change heat storage material increases thermmal storage density by phase change heat storage material to increase hot charge and discharge device 8
Heat exchange amount, and grid 7 is arranged in the interface being connected in circulation canal 6 with hot charge and discharge device 8, to prevent in hot charge and discharge device 8
Phase-transition heat-storage unit 9 flows into solar pond with salt water and solar pond is caused to disturb；The driving of density contrast of the hot salt brine caused by the temperature difference
Under, it flows into the hot charge and discharge device 8 for being located at 6 other end of circulation canal, the heat release in hot charge and discharge device 8, temperature reduces, and density increases
Greatly, the cool brine therefore after heat release flows back to the lower troposphere 4 of salt gradient solar pond 1, while pressure along 6 bottom of circulation canal
The also gas pressure in adjustable hot charge and discharge device 8 in free space 10 of controller 14, the cool brine after heat release is in density contrast
With under the driving of pressure flow into salt gradient solar pond 1 lower troposphere 4 in, so in cycles, under salt gradient solar pond 1
Hot salt brine in troposphere 4 is flowed into hot charge and discharge device 8 under the action of density contrast by circulating line 6, in hot charge and discharge device 8
Middle release heat, the salt water after temperature reduces flows into lower troposphere 4 along circulation canal 6 again, to realize heat is continuous
It is transmitted in hot charge and discharge device 8 from lower troposphere 4, heat exchanger 11 is set in hot charge and discharge device 8, and is arranged and mentions for user's heat
Hot fluid outlet ports 16 after the cold fluid inlet 15 and heat exchange that take, cold fluid enter heat exchanger 11 from cold fluid inlet 15,
Hot fluid after exchanging heat in heat exchanger 11 is flowed out from hot fluid outlet ports 16, so that the heat in hot charge and discharge device 8 constantly be mentioned
Supply user.
Heat exchanger 11 in hot charge and discharge device 8 described in the invention patent, which proposes heat, can propose heat using heat pipe, while heat is filled
It puts device 8 to be set as two layers, the condensation segment of heat pipe is placed by lower layer, and the evaporator section of heat pipe is placed on upper layer.
The phase change heat storage material in phase-transition heat-storage unit 9 in hot charge and discharge device 8 described in the invention patent can use
Paraffin.
It can be set according to the circulation canal 6 that devices discussed above is connected with salt gradient solar pond 1 and hot charge and discharge device 8
Mechanical device is set, its tilt angle is made to become adjustable, specific angle should be related to local solar radiation angle.
Settable temperature sensor in hot charge and discharge device 8 described in the invention patent, and pressure control is controlled by single-chip microcontroller
Device 14 processed when temperature is reduced to certain value, can control pressure controller 14, increase free space 10 in hot charge and discharge device 8
Gas pressure passes back into the salt water in hot charge and discharge device 8 in lower troposphere 4.
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 (8)
1. a kind of method that salt gradient solar pond self-loopa proposes heat, including salt gradient solar pond (1) and self-loopa propose thermal modules, from
Circulation proposes thermal modules and is made of circulation canal (6), hot charge and discharge device (8) and pressure control module, and hot charge and discharge device (8) is internally provided with
Phase-transition heat-storage unit (9) and heat exchanger (11)；Pressure control module is used to control the pressure in hot charge and discharge device (8), pressure control
Module includes valve (12), gas pipeline (13) and pressure controller (14)；The self-loopa proposes heat and refers to by the salt gradient sun
Pond (1) absorbs and the heat of storage passes through circulation canal (6) and passes to hot charge and discharge device (8), and passes through changing in hot charge and discharge device (8)
Hot device (11) constantly extracts heat；Wherein, the interface that the circulation canal (6) is connected with hot charge and discharge device (8) answers height
In the interface that circulation canal (6) is connected with lower troposphere (4), i.e., circulation canal (6) is by direction arrangement obliquely；Hot charge and discharge device
(8) liquid level in is lower than salt gradient solar pond (1) upper surface.
2. the method that a kind of salt gradient solar pond self-loopa according to claim 1 proposes heat, working principle is, in salt
The lower troposphere (4) of gradient solar pond (1) has circulation canal (6), i.e. circulation canal (6) one end is connected with lower troposphere (4),
Under the driving of density contrast of the hot salt brine caused by the temperature difference, flow into the hot charge and discharge device (8) for being located at circulation canal (6) other end,
The heat release in hot charge and discharge device (8), temperature reduce, and density increases, therefore the cool brine after heat release is flowed back to along circulation canal (6) bottom
The lower troposphere (4) of salt gradient solar pond (1), so in cycles, the salt water in lower troposphere (4) is with heat transfer free convection
Mode brings heat in hot charge and discharge device (8) into, from salt gradient solar pond (1) constantly to realize that the heat of salt gradient solar pond (1) mentions
It takes.
3. the method that a kind of salt gradient solar pond self-loopa according to claim 1 proposes heat, it is further characterized in that, it is described
Hot charge and discharge device (8) increases thermmal storage density by phase-transition heat-storage unit (9), and has the function that heat is discharged to user.
4. the method that a kind of salt gradient solar pond self-loopa according to claim 1 proposes heat, which is characterized in that hot charge and discharge device
(8) liquid level in is adjusted by the gas pressure of free space (10) in hot charge and discharge device (8).
5. the device that a kind of salt gradient solar pond self-loopa proposes heat, which is characterized in that troposphere (4) under salt gradient solar pond (1)
Circulation canal (6) are arranged in side wall, and circulation canal (6) one end is connected with troposphere (4) under salt gradient solar pond (1), the other end and
Hot charge and discharge device (8) is connected, so that hot charge and discharge device (8) forms the salt water communicated with salt gradient solar pond (1) by circulation canal (6)
Free air space；It is the free space (10) with certain gas, the free space (10) and gas pipeline at the top of hot charge and discharge device (8)
(13) it is connected, is provided on gas pipeline (13) valve (12), it is freely empty in gas pipeline (13) one end and hot charge and discharge device (8)
Between (10) be connected, the other end is connected with gas pressure regulator (14), pressure controller (14) be used for control in hot charge and discharge device (8)
The pressure of free space (10), to control the liquid level in hot charge and discharge device (8).
6. the device that a kind of salt gradient solar pond self-loopa according to claim 5 proposes heat, which is characterized in that the heat
Phase-transition heat-storage unit (9) are added in charge and discharge device (8) bottom, which is the solid envelope equipped with phase-change heat-storage material
Assembling structure.
7. the device that a kind of salt gradient solar pond self-loopa according to claim 5 proposes heat, which is characterized in that described follows
Grid (7) are arranged in the interface that ring channel (6) is connected with hot charge and discharge device (8), to prevent the phase-transition heat-storage list in hot charge and discharge device (8)
First (9) flow into circulation canal (6).
8. the device that a kind of salt gradient solar pond self-loopa according to claim 5 proposes heat, which is characterized in that the heat
Heat exchanger (11) are set in charge and discharge device (8), and the heat after cold fluid inlet (15) and heat exchange for user's heat extraction is set
Fluid outlet (16), so that the heat in hot charge and discharge device (8) is constantly supplied to user.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810008444.8A CN108332438B (en) | 2018-01-04 | 2018-01-04 | A kind of method and apparatus that the self-loopa of salt gradient solar pond proposes heat |
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| CN201810008444.8A CN108332438B (en) | 2018-01-04 | 2018-01-04 | A kind of method and apparatus that the self-loopa of salt gradient solar pond proposes heat |
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| CN108332438B true CN108332438B (en) | 2019-08-06 |
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| CN110159498A (en) * | 2019-06-24 | 2019-08-23 | 河南理工大学 | A kind of piston type hot-air engine device based on salt gradient solar pond |
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| US4244351A (en) * | 1978-11-06 | 1981-01-13 | Intertechnology/Solar Corporation | Solar collection system |
| US4429683A (en) * | 1982-09-29 | 1984-02-07 | The United States Of America As Represented By The United States Department Of Energy | Gradient zone boundary control in salt gradient solar ponds |
| JPS60251346A (en) * | 1984-05-29 | 1985-12-12 | Toshiba Corp | System utilizing solar heat by solar pond |
| CN2094547U (en) * | 1990-12-28 | 1992-01-29 | 国家海洋局天津海水淡化与综合利用研究所 | Honeycomb circulation solar pool sea water freshing device |
| CN102183096A (en) * | 2011-03-18 | 2011-09-14 | 上海电力学院 | Solar pond composite drying system |
| CN202470492U (en) * | 2011-12-06 | 2012-10-03 | 河南理工大学 | Device for maintaining stability of salt gradient solar pond |
-
2018
- 2018-01-04 CN CN201810008444.8A patent/CN108332438B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4244351A (en) * | 1978-11-06 | 1981-01-13 | Intertechnology/Solar Corporation | Solar collection system |
| US4429683A (en) * | 1982-09-29 | 1984-02-07 | The United States Of America As Represented By The United States Department Of Energy | Gradient zone boundary control in salt gradient solar ponds |
| JPS60251346A (en) * | 1984-05-29 | 1985-12-12 | Toshiba Corp | System utilizing solar heat by solar pond |
| CN2094547U (en) * | 1990-12-28 | 1992-01-29 | 国家海洋局天津海水淡化与综合利用研究所 | Honeycomb circulation solar pool sea water freshing device |
| CN102183096A (en) * | 2011-03-18 | 2011-09-14 | 上海电力学院 | Solar pond composite drying system |
| CN202470492U (en) * | 2011-12-06 | 2012-10-03 | 河南理工大学 | Device for maintaining stability of salt gradient solar pond |
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