CN102495439A - Fresnel-type condensation reflector and Fresnel-type solar hot water system - Google Patents
Fresnel-type condensation reflector and Fresnel-type solar hot water system Download PDFInfo
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- CN102495439A CN102495439A CN2011104520001A CN201110452000A CN102495439A CN 102495439 A CN102495439 A CN 102495439A CN 2011104520001 A CN2011104520001 A CN 2011104520001A CN 201110452000 A CN201110452000 A CN 201110452000A CN 102495439 A CN102495439 A CN 102495439A
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- fresnel formula
- fresnel
- bar
- optically focused
- reverberator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/77—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with flat reflective plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S2023/87—Reflectors layout
- F24S2023/872—Assemblies of spaced reflective elements on common support, e.g. Fresnel reflectors
-
- 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
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- Engineering & Computer Science (AREA)
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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)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention relates to a Fresnel-type condensation reflector which comprises a Fresnel-type reflector apparatus. The Fresnel-type reflector apparatus comprises a series of discontinuous bar-shaped reflectors possessing different inclination angles. The bar-shaped reflectors are arranged side by side so as to form a zigzag shape and share a focal point. Preferably, the bar-shaped reflectors are plane mirrors. A fixed seat is included. The bar-shaped reflectors are fixed on the fixed seat. The fixed seat comprises a zigzag stick. The zigzag stick is provided with several serrated faces. The bar-shaped reflectors are fixed on the serrated faces respectively. The invention also provides a relative Fresnel-type solar hot water system. A design of the Fresnel-type condensation reflector of the invention is unique, a structure is simple and manufacturing cost is low. A concentrating ratio is increased. An area of a heat absorber can be reduced. Heat absorption efficiency of the heat absorber can be increased too. The Fresnel-type solar hot water system possesses a sun-chasing function. The utilization efficiency of energy can be increased. The reflector and the system are suitable for large scale popularization and application.
Description
Technical field
The present invention relates to technical field of solar energy utilization equipment, particularly optically focused reverberator technical field specifically is meant a kind of Fresnel formula optically focused reverberator and Fresnel formula solar water heating system.
Background technology
Energy problem is one of distinct issues the most that present worldwide faces, and sun power is human inexhaustible, nexhaustible clean energy resource.Solar water heater be a kind of sun power that utilizes as energy, transfer luminous energy to heat energy, a kind of system that water is heated.Fresnel formula solar water heating system is improved on traditional solar water heater basis; By a series of confocal points but the different discontinuous groove type paraboloid of face shape parameter form; Each discontinuous groove type paraboloid is formed by discrete stripe-shape plane mirror match; Because present solar water heater capacity usage ratio is low, temperature is low and do not have solar tracking function etc., the Fresnel solar energy hot-water heating system has one dimension solar tracking function, has improved energy utilization efficiency.Wherein the design of Fresnel formula catoptron is the key of whole Fresnel formula solar water heating system.
Existing solar water heating system has closing-sunning type, flat, light collecting, electron tubes type etc., its mainly be fixed on the roof or some buildingss on use no solar tracking function; Energy loss is bigger; And optically focused own is smaller, and heat absorption efficiency is low, and temperature is lower than some temperature; Noenergy absorbs, and the annual most of the time all can not use.
For example, among the Chinese invention patent application CN200710093980.4, adopt a bar shaped Fresnel condenser lens, improve the optically focused ratio of solar water heater, solar light focusing on absorber plate, is not had the solar tracking function, at the end of the day, energy loss is bigger.
Therefore, a kind of Fresnel formula optically focused reverberator and Fresnel formula solar water heating system need be provided, this Fresnel formula optically focused reverberator manufacturing cost reduces; Have light-focusing function, large-area hot spot is reflexed on the absorber plate of small size, improved the optically focused ratio; Reduced the area of absorber plate; Improved the heat absorption efficiency on the absorber plate, the Fresnel formula solar water heating system with this Fresnel formula optically focused reverberator also has the solar tracking function, and total system is motion sunward always; Shine on the absorber plate with making light maximal efficiency on the catoptron within one day, improved the utilization ratio of energy.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, a kind of Fresnel formula optically focused reverberator and Fresnel formula solar water heating system are provided, this Fresnel formula optically focused reflector design is unique; Simple in structure, low cost of manufacture has light-focusing function; Large-area hot spot is reflexed on the absorber plate of small size, improved the optically focused ratio, reduce the area of heat dump; Improved the heat absorption efficiency on the heat dump; Fresnel formula solar water heating system with this Fresnel formula optically focused reverberator also has the solar tracking function, and total system is motion sunward always, shines on the heat dump with making light maximal efficiency on the Fresnel formula optically focused reverberator within one day; Improve the utilization ratio of energy, be suitable for large-scale promotion application.
In order to realize above-mentioned purpose; In first aspect of the present invention; A kind of Fresnel formula optically focused reverberator is provided, has been characterized in, comprised Fresnel formula reflector apparatus; Said Fresnel formula reflector apparatus comprises a series of discontinuous bar shaped catoptrons with different angle, and said bar shaped catoptron is arranged side by side and forms zigzag and confocal point.Thereby said bar shaped catoptron forms a series of confocal points but the different discontinuous parabola of face shape parameter, and each discontinuous parabola is formed by discrete bar shaped catoptron match.
Preferably, said bar shaped catoptron is a plane mirror.
Preferably, said Fresnel formula reflector apparatus also comprises holder, and said bar shaped catoptron is fixed on the said holder.
More preferably, said holder comprises the serrate bar, and said serrate bar is provided with some serrated faces, and said bar shaped catoptron is separately fixed on the said serrated face.
Further; Said serrate bar comprises symmetrically arranged two serrate parts; The angle that two said indented portion form between dividing is less than 15 °; The upper extreme point of the said serrated face on the said serrate part is located along the same line, and the lower extreme point of the said serrated face on the perhaps said serrate part is located along the same line, and the line segment that is parallel to the crest line of bar shaped catoptron in the perhaps said bar shaped catoptron is positioned at same plane.
In second aspect of the present invention, a kind of Fresnel formula solar water heating system is provided, be characterized in, comprise above-mentioned Fresnel formula optically focused reverberator.
Preferably, said Fresnel formula solar water heating system also comprises heat dump, and said heat dump is installed on the focus of said Fresnel formula optically focused reverberator.
More preferably, said Fresnel formula solar water heating system also comprises sun-following device, and said heat dump and said Fresnel formula optically focused reverberator are installed on the said sun-following device.
Further; Said sun-following device comprises gear, arc-shaped guide rail and driver part; Said heat dump and said Fresnel formula optically focused reverberator are installed on the said arc-shaped guide rail, drive said arc-shaped guide rail rotation thereby said driver part connects said arc-shaped guide rail through said gear.
More preferably, said Fresnel formula solar water heating system also comprises water receiver, and said water receiver is respectively through cold water pipe and the said heat dump of hot-water line pipeline connection.
Compared with prior art, technique effect of the present invention is:
1, Fresnel formula optically focused reverberator provided by the invention comprises Fresnel formula reflector apparatus, and said Fresnel formula reflector apparatus comprises a series of discontinuous bar shaped catoptrons with different angle, and said bar shaped catoptron is arranged side by side and forms zigzag and confocal point; Design is unique, and is simple in structure, low cost of manufacture; Has light-focusing function; Large-area hot spot is reflexed on the heat dump of small size, improved the optically focused ratio, reduce the area of heat dump; Improve the heat absorption efficiency on the heat dump, be suitable for large-scale promotion application.
2, Fresnel formula solar water heating system of the present invention comprises above-mentioned Fresnel formula optically focused reverberator; Also comprise sun-following device, said heat dump and said Fresnel formula optically focused reverberator are installed on the said sun-following device, thereby have the solar tracking function; Total system is motion sunward always; Shine on the heat dump with making light maximal efficiency on the Fresnel formula optically focused reverberator within one day, improved the utilization ratio of energy, be suitable for large-scale promotion application.
Description of drawings
Fig. 1 is the schematic perspective view of a specific embodiment of Fresnel formula optically focused reverberator of the present invention.
Fig. 2 looks synoptic diagram for the master of specific embodiment shown in Figure 1.
Fig. 3 is the evolution key diagram of specific embodiment shown in Figure 1.
Fig. 4 is that the master of another specific embodiment of Fresnel formula optically focused reverberator of the present invention looks synoptic diagram.
Fig. 5 is that the master of the another specific embodiment of Fresnel formula optically focused reverberator of the present invention looks synoptic diagram.
Fig. 6 is the evolution key diagram of specific embodiment shown in Figure 5.
Fig. 7 is the structure and the principle schematic of a specific embodiment of Fresnel formula solar water heating system of the present invention.
Fig. 8 is the volume rendering synoptic diagram of the sun-following device that adopts of specific embodiment shown in Figure 7.
Embodiment
In order more to be expressly understood technology contents of the present invention, the special following examples of lifting specify, and wherein identical parts adopt identical Reference numeral.When the embodiment of the invention was detailed, for ease of explanation, the indication device structural representation can be disobeyed general ratio and amplified, and said synoptic diagram is example, and it should not limit the scope of the present invention's protection at this.
See also shown in Fig. 1～6; Fresnel formula optically focused reverberator of the present invention comprises Fresnel formula reflector apparatus 1; Said Fresnel formula reflector apparatus 1 comprises a series of discontinuous bar shaped catoptrons 14 with different angle, and said bar shaped catoptron 14 is arranged side by side and forms zigzag and confocal point 3.
Said Fresnel formula optically focused reverberator is a kind of focusing mirror, and it on heat dump 4 (seeing also shown in Fig. 7 and 8), is used for improving the optical power density of solar water heater with solar light focusing, promptly improves its optically focused ratio.Each crest line 13 of bar shaped catoptron 14 is parallel to each other basically, and its imaging characteristic is similar to parabola.
Said bar shaped catoptron 14 can be any suitable catoptron, sees also shown in Fig. 1～6, and in several specific embodiments of the present invention, said bar shaped catoptron 14 is plane mirrors.
For bar shaped catoptron 14 is fixed well, preferably, said Fresnel formula reflector apparatus 1 also comprises holder, and said bar shaped catoptron 14 is fixed on the said holder.More preferably, said holder comprises serrate bar 12, and said serrate bar 12 is provided with some serrated faces 17, and said bar shaped catoptron 14 is separately fixed on the said serrated face 17.See also shown in Fig. 1～2 and 4; In two specific embodiments of the present invention; Said serrate bar 12 comprises symmetrically arranged two serrate parts; The angle that two said indented portion form between dividing is less than 15 °; The upper extreme point 15 of the said serrated face 17 on the said serrate part is located along the same line (as shown in Figure 2), and the lower extreme point 16 of the said serrated face 17 on the perhaps said serrate part is located along the same line (as shown in Figure 4), and the line segment that is parallel to the crest line 13 of bar shaped catoptron 14 in the perhaps said bar shaped catoptron 14 is positioned at same plane.
Bar shaped catoptron of the present invention 14 forms a series of confocal points but different discontinuous parabolic 2 of face shape parameter, and each discontinuous parabolic 2 is formed by discrete bar shaped catoptron 14 matches.As illustrated in fig. 1 and 2; Each vertical bar band (is a serrated face 17; Or perhaps 12 interior every adjacent two bar-shaped zones that crest line 13 is separated to form of the serrate bar shown in Fig. 1 and 2) adopt the face shape parameter of different parabolas 2 in; Require the parabola 2 in each band to have identical focus 3, as shown in Figure 3.Realize the variation of the focus 3 of Fresnel formula reflector apparatus 1 through the inclination angle size that changes each bar shaped catoptron 14.Known parabolic 2 is to be bus with para-curve, and the scanning direction in edge forms, and is as shown in Figure 3, and the parabolic equation of crossing initial point is following:
y
2＝2p
0z (1)
P wherein
0Be parabolical shape parameter, its focal coordinates do
All and the confocal parabolic equation of above-mentioned initial parabolic equation (1) are:
Wherein, d is the intercept of para-curve on the z axle.
As shown in Figure 3, the face shape parameter formula of the parabola 2 in each vertical bar band is following:
Wherein, (y
i, z
i) be coordinate along serrate bar 12 length direction discretize points, d
iBe the intercept of i bar para-curve on the z axle.
Lift a special case below again, see also shown in Figure 5ly, wherein serrate bar 12 is a single part, we can say that perhaps the angle that two said indented portion form between dividing is 0 °.In this specific embodiment; Said serrate bar 12 is formed by a straight steel bar cut; The upper extreme point 15 of the serrated face 17 of said serrate bar 12 all is located along the same line; The lower extreme point 16 of the serrated face 17 of said serrate bar 12 all is located along the same line, also can makes the line segment that is parallel to the crest line 13 of bar shaped catoptron 14 in the said bar shaped catoptron 14 be positioned at same plane.The discrete uniform discrete that turns to of said serrate bar 12 length directions.Adopt the face shape parameter of different parabolas 2 in each vertical bar band, require the parabola 2 in each vertical bar band to have identical focus 3, as shown in Figure 6.Realize the variation of the focus 3 of Fresnel formula reflector apparatus 1 through the inclination angle size that changes each bar shaped catoptron 14.The face face shape parameter formula of parabolic 2 is following in each vertical bar band:
Wherein, y
iBe the coordinate along serrate bar 12 length direction discretize points, d
iBe the intercept of i bar para-curve on the z axle.
See also shown in Fig. 7～8, Fresnel formula solar water heating system 100 of the present invention comprises above-mentioned Fresnel formula optically focused reverberator.See also shown in Figure 7ly, in specific embodiment of the present invention, Fresnel formula solar water heating system 100 of the present invention comprises the Fresnel formula reflector apparatus 1 shown in Fig. 5～6.
For energy absorption with Fresnel formula optically focused reflector reflects; See also Fig. 7 and shown in Figure 8; In specific embodiment of the present invention; Said Fresnel formula solar water heating system also comprises heat dump 4, and it specifically is on the focus of Fresnel formula reflector apparatus 1 that said heat dump 4 is installed in said Fresnel formula optically focused reverberator.
In order to make full use of sun power; See also shown in Figure 8; In specific embodiment of the present invention; Said Fresnel formula solar water heating system also comprises sun-following device 11, and said heat dump 4 specifically is that Fresnel formula reflector apparatus 1 is installed on the said sun-following device 11 with said Fresnel formula optically focused reverberator.
Said sun-following device 11 can have any suitable structure; See also shown in Figure 8; In specific embodiment of the present invention; Said sun-following device 11 comprises gear 7, arc-shaped guide rail 8 and driver part 9, and said heat dump 4 specifically is that Fresnel formula reflector apparatus 1 is installed on the said arc-shaped guide rail 8 with said Fresnel formula optically focused reverberator, drives said arc-shaped guide rail 8 rotations thereby said driver part 9 connects said arc-shaped guide rail 8 through said gear 7.Driver part 9 can be any, for example stepper motor.
In order to utilize the heat in the heat dump 4; See also shown in Figure 7; In specific embodiment of the present invention, said Fresnel formula solar water heating system also comprises water receiver 6, and said water receiver 6 is respectively through cold water pipe 5 and the said heat dump 4 of hot-water line (not shown) pipeline connection.Hot-water line be with the flow of hot water in the heat dump 4 in water receiver 6, cold water pipe 5 is that the cold water in the water receiver 6 is flowed in the heat dump 4.Water receiver 6 has insulation and water storage function.
Said heat dump 4 can adopt any suitable heat dump; See also shown in Fig. 7 and 8; In specific embodiment of the present invention; Said heat dump 4 is flat heat dumps, and absorbing Fresnel formula optically focused reverberator specifically is the sunshine of Fresnel formula reflector apparatus 1 reflection, and the water on the heat dump 4 of flowing through is heated.
Fresnel formula solar water heating system 100 of the present invention has the solar tracking function, and total system is motion sunward always, shines on the heat dump 4 with making light maximal efficiency on the bar shaped catoptron 14 within one day, has improved the utilization ratio of energy; In engineering, making a desirable parabola simultaneously is some difficulty; And it is less that the producer of such groove type paraboloid can be done in the whole world; Its cost is higher, adopts the discrete stripe-shape plane mirror match of polylith to form Fresnel formula catoptron here, replaces some curved reflectors (like parabolic mirror); Reduced cost, be prone to install; Employing serrate bar 12 can be realized fixing the bar shaped catoptron 14 of different angle easily; This system has light-focusing function, and large-area hot spot is reflexed on the absorber plate of small size, has improved the optically focused ratio, has reduced the area of absorber plate, has improved the heat absorption efficiency on the absorber plate.
To sum up, Fresnel formula optically focused reflector design of the present invention is unique, and is simple in structure; Low cost of manufacture has light-focusing function, and large-area hot spot is reflexed on the heat dump of small size; Improve the optically focused ratio, reduced the area of heat dump, improved the heat absorption efficiency on the heat dump; Fresnel formula solar water heating system with this Fresnel formula optically focused reverberator also has the solar tracking function, and total system is motion sunward always, shines on the heat dump with making light maximal efficiency on the Fresnel formula optically focused reverberator within one day; Improve the utilization ratio of energy, be suitable for large-scale promotion application.
In this instructions, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, instructions and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (10)
1. Fresnel formula optically focused reverberator; It is characterized in that; Comprise Fresnel formula reflector apparatus, said Fresnel formula reflector apparatus comprises a series of discontinuous bar shaped catoptrons with different angle, and said bar shaped catoptron is arranged side by side and forms zigzag and confocal point.
2. Fresnel formula optically focused reverberator according to claim 1 is characterized in that said bar shaped catoptron is a plane mirror.
3. Fresnel formula optically focused reverberator according to claim 1 is characterized in that said Fresnel formula reflector apparatus also comprises holder, and said bar shaped catoptron is fixed on the said holder.
4. Fresnel formula optically focused reverberator according to claim 3 is characterized in that said holder comprises the serrate bar, and said serrate bar is provided with some serrated faces, and said bar shaped catoptron is separately fixed on the said serrated face.
5. Fresnel formula optically focused reverberator according to claim 4; It is characterized in that; Said serrate bar comprises symmetrically arranged two serrate parts; The angle that two said indented portion form between dividing is less than 15 °; The upper extreme point of the said serrated face on the said serrate part is located along the same line, and the lower extreme point of the said serrated face on the perhaps said serrate part is located along the same line, and the line segment that is parallel to the crest line of bar shaped catoptron in the perhaps said bar shaped catoptron is positioned at same plane.
6. a Fresnel formula solar water heating system is characterized in that, comprises according to each described Fresnel formula optically focused reverberator in the claim 1 to 5.
7. Fresnel formula solar water heating system according to claim 6 is characterized in that, said Fresnel formula solar water heating system also comprises heat dump, and said heat dump is installed on the focus of said Fresnel formula optically focused reverberator.
8. Fresnel formula solar water heating system according to claim 7 is characterized in that, said Fresnel formula solar water heating system also comprises sun-following device, and said heat dump and said Fresnel formula optically focused reverberator are installed on the said sun-following device.
9. Fresnel formula solar water heating system according to claim 8; It is characterized in that; Said sun-following device comprises gear, arc-shaped guide rail and driver part; Said heat dump and said Fresnel formula optically focused reverberator are installed on the said arc-shaped guide rail, drive said arc-shaped guide rail rotation thereby said driver part connects said arc-shaped guide rail through said gear.
10. Fresnel formula solar water heating system according to claim 7 is characterized in that, said Fresnel formula solar water heating system also comprises water receiver, and said water receiver is respectively through cold water pipe and the said heat dump of hot-water line pipeline connection.
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| CN2011104520001A CN102495439A (en) | 2011-12-29 | 2011-12-29 | Fresnel-type condensation reflector and Fresnel-type solar hot water system |
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| CN102748875A (en) * | 2012-07-17 | 2012-10-24 | 福建省电力有限公司电力科学研究院 | Bridge type large-capacity high-concentrating-ratio composite Fresnel line concentrating and reflecting device |
| CN105674588A (en) * | 2016-04-05 | 2016-06-15 | 上海晶电新能源有限公司 | Multi-secondary reflection tower-confocal solar photothermal mirror field system |
| CN108036527A (en) * | 2017-12-25 | 2018-05-15 | 天津清芸主力能源科技有限公司 | A kind of novel dish type optical collector structure |
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| CN202472013U (en) * | 2011-12-29 | 2012-10-03 | 上海晶电新能源有限公司 | Fresnel-type condensation reflector and Fresnel-type solar hot water system |
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| CN102748875A (en) * | 2012-07-17 | 2012-10-24 | 福建省电力有限公司电力科学研究院 | Bridge type large-capacity high-concentrating-ratio composite Fresnel line concentrating and reflecting device |
| CN105674588A (en) * | 2016-04-05 | 2016-06-15 | 上海晶电新能源有限公司 | Multi-secondary reflection tower-confocal solar photothermal mirror field system |
| CN108036527A (en) * | 2017-12-25 | 2018-05-15 | 天津清芸主力能源科技有限公司 | A kind of novel dish type optical collector structure |
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Application publication date: 20120613 |