CN206683251U - Effectively reduce the device of tower type solar heat dump thermal radiation loss - Google Patents
Effectively reduce the device of tower type solar heat dump thermal radiation loss Download PDFInfo
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- CN206683251U CN206683251U CN201720255983.2U CN201720255983U CN206683251U CN 206683251 U CN206683251 U CN 206683251U CN 201720255983 U CN201720255983 U CN 201720255983U CN 206683251 U CN206683251 U CN 206683251U
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- baffle plate
- heat dump
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- steel bar
- thermal radiation
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- 229910000831 Steel Inorganic materials 0.000 claims description 35
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
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- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
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- 239000010410 layer Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
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- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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Classifications
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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
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses the device for effectively reducing tower type solar heat dump thermal radiation loss, it includes supporting construction (2) and baffle plate (3) positioned at the top of heat dump (1), heat dump apical ring (11) is installed at the top of the heat dump (1), the heat dump apical ring (11) is welded with supporting construction (2), and the top of the supporting construction is connected with baffle plate (3)；The baffle plate (3) includes baffle plate connecting portion (31) and baffle plate enclosing portion (32), and baffle plate enclosing portion (32) is welded as whole baffle plate (3) with baffle plate connecting portion (31)；Baffle plate connecting portion (31) is connected with connection sheet (25) by bolt (4) and nut (5)；Baffle heat dump is to atmospheric radiation heat, while the radiation energy that baffle plate is reflected back can carry out reheating to heat dump, reduce the thermal radiation loss of vacuum heat collection pipe and sky, effectively improve the photo-thermal efficiency of trough type solar power generation collecting system.
Description
Technical field
The utility model belongs to solar energy thermal-power-generating technical field, more particularly to effectively reduces tower type solar heat dump heat
The device of radiation loss.
Background technology
In recent years, the sharp increase with world population and industrial fast development, a large amount of utilize of fossil energy cause
Serious energy crisis, each state can all substitute the new energy of fossil energy in searching.Solar energy thermal-power-generating technology is because of its energy
The advantages such as huge, cleanliness without any pollution are gradually utilized by people.
Solar energy thermal-power-generating technology is divided into three kinds of modes of tower, slot type and dish-style.Relative to slot type and dish-style heat generating skill
Art, tower-type solar thermal power generating system have higher focusing ratio (between 300-1000), photo-thermal conversion efficiency high and generated electricity
Low cost and other advantages, commercial application prospect are huge.
Tower-type solar thermal power generating system is mainly by heliostat field, heat dump, fused salt storage tank, heat exchanger and electricity generation system
Composition, core component of the heat dump as collecting system, for absorbing the sunshine of heliostat field reflection, infrared radiant energy is transmitted
To heat-transfer working medium.Air can form more than 700 DEG C of high-temperature hot air, heat-transfer working medium temperature as heat-transfer working medium by heat dump
Higher, the efficiency of gas turbine is higher, then the optical-electronic conversion efficiency of whole solar energy thermal-power-generating factory is higher.
The heat dump of current large-scale tower-type thermal power station is mostly bareing, i.e., heat dump outside wall surface is simultaneously optically focused receiving plane
With air interface, in the radiation loss of current tower heat dump, especially in the case of high temperature, heat loss through radiation accounts for total heat
The 70%~90% of loss, these heat loss through radiation are mainly to sky radiating above and under by heat dump high temperature outer surface
What the ground radiation loss in face was fallen, at air cleanliness and penetrating degree very good, cloudless night or daytime, heat dump top is all
It is directly to cosmic radiation, cosmic background temperature is 4K (- 269 DEG C), and this is the main reason for connecing heat dump loss.And heat dump
Bottom is that terrestrial surface radiation is radiated, and surface temperature is identical with environment temperature, typically between -30 DEG C to 30 DEG C, the spoke of this part
Penetrate radiation loss and little.Heat-conducting medium temperature in heat dump is higher, bigger to the radiation heat loss in universe, its heat loss
Size be directly connected to the optical and thermal efficiency of system.In solar energy tower type thermal generation system main heat loss be heat dump with
The thermal radiation loss of sky, reduce the thermal radiation loss of heat dump have to the optical-electronic conversion efficiency for improving whole electric field it is great
Meaning.The heat dump of tower type solar energy thermal power generation easily causes light pollution problem, how subtracted due to assembling a large amount of sunshines simultaneously
Few light pollution is also an important topic of tower power station.
Utility model content
It is big for the above-mentioned heat dump thermal radiation loss existed in the prior art in solar energy tower type electricity generation system, easily make
Into the technical problem of light pollution, the utility model provides the device for effectively reducing tower type solar heat dump thermal radiation loss,
The baffle plate being provided with can reduce the thermal radiation loss of heat dump and sky, so as to improve tower type solar energy thermal power generation collecting system
Light- heat transfer efficiency；Baffle plate can also play a part of alleviating light pollution.
In order to solve the above technical problems, the technical solution adopted in the utility model is：Effectively reduce tower type solar heat absorption
The device of device thermal radiation loss, including supporting construction and baffle plate at the top of heat dump, heat absorption is installed at the top of heat dump
Device apical ring, heat dump apical ring are welded with supporting construction, and supporting construction includes cylinder, steel bar, support and connection sheet, and cylinder is positioned at suction
At the center of hot device apical ring, be welded with steel bar on cylinder, steel bar is in outside dispersion shape centered on the axis of cylinder, steel bar it is another
One end is welded on heat dump annulus, and support is welded with the steel bar, and the cantilever tip is welded with connection sheet, the connection
Piece offers bolt hole；The baffle plate includes baffle plate connecting portion and baffle plate enclosing portion, and baffle plate enclosing portion is welded with baffle plate connecting portion
For whole baffle plate；Baffle plate connecting portion is connected with connection sheet by bolt, nut.
Preferably, above-mentioned radiation proof baffle plate is in ladder type, circular platform type or dome-type.
Preferably, the material of above-mentioned radiation proof baffle plate is aluminium sheet, stainless steel plate or other resistant materials, as aluminium closes
Gold, lead etc..
Preferably, above-mentioned radiation proof baffle plate is individual layer or two-level architecture, it is vacuum environment inside dual-layered baffle plate.
Preferably, above-mentioned supporting construction is carbon steel material, its lower end is welded at the top of heat dump, and upper end is connected by bolt
Baffle plate is connect, plays support fixed dam effect.
Preferably, above-mentioned baffle plate connection is provided with pad not between connection sheet.
Preferably, above-mentioned steel bar is 3~5 groups, every group of steel bar is formed by upper and lower two, one end of steel bar above
The upper at of cylinder is welded on, one end of underlying steel bar is welded at the lower edge of cylinder.
Preferably, being provided with reinforcement between every group of adjacent steel bar, one end of reinforcement is welded on cylinder, reinforcement
The other end be welded on heat dump apical ring.
Compared with prior art, the beneficial effects of the utility model are：By setting radiation proof baffle plate, baffle is inhaled
Hot device is to atmospheric radiation heat, while the radiation energy that baffle plate is reflected back can carry out reheating to heat dump, reduce vacuum heat-collecting
The thermal radiation loss of pipe and sky, effectively improve the optical and thermal efficiency of trough type solar power generation collecting system；Baffle plate also reduces
The light of heat dump aggregation can effectively reduce light pollution to atmospheric scattering.
Brief description of the drawings
Fig. 1 is the dome-type knot of the device of effective reduction tower type solar heat dump thermal radiation loss in the utility model
Structure detailed schematic；
Fig. 2 is the supporting construction of the device of effective reduction tower type solar heat dump thermal radiation loss in the utility model
Top view；
Fig. 3 is the supporting construction of the device of effective reduction tower type solar heat dump thermal radiation loss in the utility model
Side view；
Fig. 4 is the supporting construction of the device of effective reduction tower type solar heat dump thermal radiation loss in the utility model
With the partial schematic diagram of baffle plate connecting portion；
Fig. 5 is the dome-type knot of the device of effective reduction tower type solar heat dump thermal radiation loss in the utility model
Structure overall schematic；
Fig. 6 is the trapezoidal-structure of the device of effective reduction tower type solar heat dump thermal radiation loss in the utility model
Overall schematic；
Fig. 7 is the circular platform type knot of the device of effective reduction tower type solar heat dump thermal radiation loss in the utility model
Structure overall schematic；
Fig. 8 is the heat loss schematic diagram of the tower-type heat collector in the example of the utility model；
Fig. 9 is that the example of the utility model contrasts effect without radiation proof baffle plate, individual layer radiation proof baffle plate and double-deck radiation proof baffle plate
Fruit is schemed；
Wherein：1- heat dumps；11- heat dump apical rings；
2- supporting constructions；21- cylinders；22- steel bars；23- reinforcements；24- supports；25- connection sheets；
3- baffle plates；31- baffle plate connecting portions；32- baffle plate enclosings portion；
4- bolts；5- nuts；6- pads；7- pylons.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
The utility model provides the device for effectively reducing tower type solar heat dump thermal radiation loss, as shown in Figure 1 to Figure 4 institute
Show, including supporting construction 2 positioned at the top of heat dump 1 and baffle plate 3, the top of heat dump are provided with heat dump apical ring 11；Support knot
Structure 2 includes cylinder 21, steel bar 22, support 24 and connection sheet 25, and cylinder 21 is located at the center of heat dump apical ring 11, on cylinder 21
Steel bar 22 is welded with, one end of steel bar 22 is welded on cylinder 21, and the other end of steel bar 22 is welded on heat dump annulus (11),
Steel bar 22 is in outside dispersion shape centered on the axis of cylinder 21, and support 24 is welded with steel bar 22, and support 24 straight up, props up
The top of frame 24 is welded with connection sheet 25, and connection sheet 25 offers bolt hole；Baffle plate 3 includes baffle plate connecting portion 31 and baffle plate enclosing portion
32, baffle plate enclosing portion 32 is welded as whole baffle plate 3 with baffle plate connecting portion 31；Baffle plate connecting portion 31 passes through bolt 4 with connection sheet 25
Connected with nut 5.
Steel bar 22 in Fig. 2 is 4 groups, then the support 24 being welded on every group of steel bar 22 is 4, and support 24 is straight up
Steel bar or steel pipe, it will be appreciated that steel bar 22 is 3 groups (support is also 3), or steel bar 22 is that 5 groups (support is also 5) are also same
Sample is applied to the utility model.
Fig. 1 is additionally provided with reinforcement 23 into Fig. 4 between every group of adjacent steel bar 22, reinforcement 23 can strengthen support knot
The firmness of structure 2.
In Fig. 4, be additionally provided with pad 6 between baffle plate connecting portion 31 and connection sheet 25, pad 6 be in order to play cushioning effect,
Damage of the anti-baffle plate connecting portion 31 by connection sheet 25.
Baffle plate 3 in Fig. 5 is hemispherical, and baffle plate 3 is single layer structure, it will be appreciated that when baffle plate 3 is double-decker, due to
The inner hollow of the baffle plate 3 of double-decker, have the function that preferably to reduce thermal radiation loss, baffle plate 3 will cover on heat dump
It top and surrounding, can prevent the heavenwards of heat dump 1 from carrying out heat radiation, but not stop the light of ground mirror field directive heat collector 1
Line.
Baffle plate 3 in Fig. 6 is trapezoidal, and baffle plate 3 is single layer structure, it will be appreciated that when baffle plate 3 is double-decker, due to double
The inner hollow of the baffle plate 3 of Rotating fields, have the function that preferably to reduce thermal radiation loss, baffle plate 3 will cover on the upper of heat dump
It side and surrounding, can prevent the heavenwards of heat dump 1 from carrying out heat radiation, but not stop the light of ground mirror field directive heat collector 1.
Baffle plate 3 in Fig. 7 is truncated cone-shaped, and baffle plate 3 is single layer structure, it will be appreciated that when baffle plate 3 is double-decker, due to
The inner hollow of the baffle plate 3 of double-decker, have the function that preferably to reduce thermal radiation loss, baffle plate 3 will cover on heat dump
It top and surrounding, can prevent the heavenwards of heat dump 1 from carrying out heat radiation, but not stop the light of ground mirror field directive heat collector 1
Line.
As shown in figure 8, the heavenwards of heat dump 1 of baffle plate 3 is not added and ground carries out heat radiation, according to actual conditions, to
Heat of the heat of sky thermal radiation loss much larger than earthward radiation loss.The collection of heat dump in tower type solar electricity generation system
Hot temperature is higher, and internal heat transfer working medium is up to 600 DEG C, and at present in the radiation loss of tower heat dump, heat loss through radiation accounts for total
The 70%~90% of heat loss, the predominantly thermal radiation loss of heat dump outer wall and sky, the heat-conducting medium temperature in heat dump
Higher, heat loss is bigger, and the size of its heat loss is directly connected to the optical and thermal efficiency of system.
Prevent radiation loss from, as example, calculating the application effect of baffle plate so that tower trapezoidal baffle plate is actual below：
Tower heat dump radiation loss schematic diagram is as follows：
Wherein 1 is heat dump, and 2 be ground, and grey arrow is the heat of heat dump heavenwards radiation, and black arrow is heat absorption
The heat that device earthward radiates.
According to the actual condition of tower receiver, heat loss through radiation situation of the approximate estimation heat dump to sky.Wherein 1 is suction
Hot device, 2 be ground, and 3 be baffle plate.Receiver high H=6.2m, diameter d=5.1m.It is now assumed that four kinds of operating modes, heat dump surface
Temperature T1=500 DEG C, environment temperature T2, baffle plate and ground take environment temperature T2=T3, i.e.,.The radiation of heat dump heavenwards dissipates
Heat, and receive the radiation of the earth in certain limit.
(1) operating mode one, summer day：T1=500 DEG C, T2=30 DEG C；
(2) operating mode two, summer evenings：T1=500 DEG C, T2=25 DEG C；
(3) operating mode three, daytime in winter：T1=500 DEG C, T2=-10 DEG C；
(4) operating mode four, night in winter：T1=500 DEG C, T2=-20 DEG C.
Computational methods are as follows：
1) in operating mode 1, in the case of baffle plate, heat dump radiates to sky radiation.According to radiation calculation formula, will inhale
Hot device is defined as black matrix, emissivity ε 1, universe temperature T0=4K, then the Radiant exothermicity of heat dump and sky be
2) in the case where there is baffle plate, thermal-collecting tube is to baffle plate heat loss through radiation.Baffle shapes to be trapezoidal, baffle plate and heat dump it
Between angle be 60 °, according to ascent formula
According to radiation calculation formula, it is assumed that baffle plate material is to polish non-aluminum oxide, emissivity ε1For 0.02, then heat dump with
The Radiant exothermicity of baffle plate is
Therefore deduce that, the energy that baffle plate can block per square meter accounts for thermal-collecting tube heavenwards off-energy
Similarly, the efficiency of blocking of rest working conditions is respectively
η2=98.5%
η3=98.4%
η4=98.2%
As can be seen here, no matter under which kind of operating mode, block heat dump emittance per square meter baffle plate and be attained by 98%.
3) difference on effect of individual layer baffle plate and dual-layered baffle plate calculates
When baffle plate is double-deck, internal layer baffle surface temperature T1=20 DEG C, outer layer baffle surface temperature T2=5 DEG C, baffle plate it is saturating
Rate ε=0.02 is penetrated, then
I.e. heat dump radiates the energy on baffle plate, and the heat for only having 0.8w per square meter is lost in vacuum, it can be seen that,
Loss of the dual-layered baffle plate structure for reducing emittance serves very crucial effect, it is clear that heat dump adds baffle plate
The feasibility and economic benefit that can be brought afterwards.
The heat loss situations of four kinds of above-mentioned operating modes is as shown in figure 9, abscissa 1/2/3/4 corresponds to operating mode one to work respectively
Condition four, a in figure are thermal radiation loss when not adding baffle plate 3, and b is thermal radiation loss when using individual layer baffle plate 3, and c is makes
With thermal radiation loss during dual-layered baffle plate 3；Obviously, can be either greatly decreased using individual layer baffle plate or dual-layered baffle plate
Heat loss, more than 75% is reduced using thermal radiation loss after individual layer baffle plate, after dual-layered baffle plate, thermal radiation loss reduces 85%
More than.
Above example is only exemplary embodiment of the present utility model, is not used in limitation the utility model, and this practicality is new
The protection domain of type is defined by the claims.Those skilled in the art can be in essence of the present utility model and protection domain
It is interior, various modifications or equivalent substitution are made to the utility model, this modification or equivalent substitution also should be regarded as new in this practicality
In the protection domain of type.
Claims (8)
1. effectively reduce the device of tower type solar heat dump thermal radiation loss, it is characterised in that including positioned at heat dump (1)
The supporting construction (2) and baffle plate (3) at top, heat dump apical ring (11), the heat dump are installed at the top of the heat dump (1)
Apical ring (11) is welded with supporting construction (2), and the supporting construction (2) includes cylinder (21), steel bar (22), support (24) and connection
Piece (25), the cylinder (21) are located at the center of the heat dump apical ring (11), and steel bar is welded with the cylinder (21)
(22), one end of the steel bar (22) is welded on cylinder (21), and the other end of the steel bar (22) is welded on heat dump apical ring
(11) on, the steel bar (22) is in outside dispersion shape centered on the axis of the cylinder (21), is welded on the steel bar (22)
There is support (24), straight up, support (24) top is welded with connection sheet (25), the connection sheet to the support (24)
(25) bolt (4) hole is offered；The baffle plate (3) includes baffle plate connecting portion (31) and baffle plate enclosing portion (32), baffle plate enclosing portion
(32) it is welded as whole baffle plate (3) with baffle plate connecting portion (31)；Baffle plate connecting portion (31) and connection sheet (25) by bolt (4) and
Nut (5) connects.
2. the device according to claim 1 for effectively reducing tower type solar heat dump thermal radiation loss, it is characterised in that
The baffle plate (3) is in ladder type, circular platform type or dome-type.
3. the device according to claim 1 for effectively reducing tower type solar heat dump thermal radiation loss, it is characterised in that
The material of the baffle plate (3) is aluminium sheet, stainless steel plate or other resistant materials.
4. the device according to claim 1 for effectively reducing tower type solar heat dump thermal radiation loss, it is characterised in that
The baffle plate (3) is individual layer or double-decker, and the inside of the baffle plate (3) of double-decker is vacuum environment.
5. the device according to claim 1 for effectively reducing tower type solar heat dump thermal radiation loss, it is characterised in that
The material of the supporting construction (2) is carbon steel.
6. the device according to claim 1 for effectively reducing tower type solar heat dump thermal radiation loss, it is characterised in that
Pad (6) is provided between the baffle plate connecting portion (31) and the connection sheet (25).
7. the device according to claim 1 for effectively reducing tower type solar heat dump thermal radiation loss, it is characterised in that
The steel bar (22) is 3~5 groups, and steel bar (22) is formed by upper and lower two described in every group, one end of steel bar above (22)
The upper at of the cylinder (21) is welded on, one end of underlying steel bar (22) is welded on the lower edge of the cylinder (21)
Place.
8. the device according to claim 1 for effectively reducing tower type solar heat dump thermal radiation loss, it is characterised in that
Reinforcement (23) is provided between steel bar (22) described in adjacent every group, one end of the reinforcement (23) is welded on the cylinder
(21) on, the other end of the reinforcement (23) is welded on the heat dump apical ring (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720255983.2U CN206683251U (en) | 2017-03-16 | 2017-03-16 | Effectively reduce the device of tower type solar heat dump thermal radiation loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720255983.2U CN206683251U (en) | 2017-03-16 | 2017-03-16 | Effectively reduce the device of tower type solar heat dump thermal radiation loss |
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| Publication Number | Publication Date |
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| CN206683251U true CN206683251U (en) | 2017-11-28 |
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ID=60393078
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720255983.2U Expired - Fee Related CN206683251U (en) | 2017-03-16 | 2017-03-16 | Effectively reduce the device of tower type solar heat dump thermal radiation loss |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907866A (en) * | 2017-03-16 | 2017-06-30 | 百吉瑞（天津）新能源有限公司 | Effectively reduce the device of tower type solar heat dump thermal radiation loss |
| CN108413632A (en) * | 2018-01-24 | 2018-08-17 | 南京航空航天大学 | A kind of tower type solar positive displacement heat collector |
-
2017
- 2017-03-16 CN CN201720255983.2U patent/CN206683251U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907866A (en) * | 2017-03-16 | 2017-06-30 | 百吉瑞（天津）新能源有限公司 | Effectively reduce the device of tower type solar heat dump thermal radiation loss |
| CN108413632A (en) * | 2018-01-24 | 2018-08-17 | 南京航空航天大学 | A kind of tower type solar positive displacement heat collector |
| CN108413632B (en) * | 2018-01-24 | 2020-04-07 | 南京航空航天大学 | Tower type solar volumetric heat collector |
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| CF01 | Termination of patent right due to non-payment of annual fee |