WO2013005479A1 - Système de collecte de lumière solaire et système de génération d'énergie électrique thermique solaire - Google Patents

Système de collecte de lumière solaire et système de génération d'énergie électrique thermique solaire Download PDF

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Publication number
WO2013005479A1
WO2013005479A1 PCT/JP2012/062498 JP2012062498W WO2013005479A1 WO 2013005479 A1 WO2013005479 A1 WO 2013005479A1 JP 2012062498 W JP2012062498 W JP 2012062498W WO 2013005479 A1 WO2013005479 A1 WO 2013005479A1
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WO
WIPO (PCT)
Prior art keywords
solar
mirror
condensing
light collection
central axis
Prior art date
Application number
PCT/JP2012/062498
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English (en)
Japanese (ja)
Inventor
俊泰 光成
Original Assignee
住友重機械工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友重機械工業株式会社 filed Critical 住友重機械工業株式会社
Publication of WO2013005479A1 publication Critical patent/WO2013005479A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
    • F24S30/42—Arrangements for moving or orienting solar heat collector modules for rotary movement with only one rotation axis
    • F24S30/425—Horizontal axis
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G02B7/183—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors specially adapted for very large mirrors, e.g. for astronomy, or solar concentrators
    • 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
    • Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
    • 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
    • Y02E10/47—Mountings or tracking

Definitions

  • the present invention relates to a solar condensing system and a solar thermal power generation system.
  • Patent Document 1 discloses a trough-type solar condensing system including a plurality of rows of bowl-shaped reflecting mirrors that condense sunlight into a linear shape with respect to a linear receiver.
  • the heat transport fluid flows inside the tubular receiver, and the heat received by the receiver by light collection is sent to the power generation equipment such as a steam turbine through the heat transport fluid. Then, power generation using solar heat is performed.
  • FIG. 6 shows an example of a conventional solar condensing system.
  • a conventional solar condensing system 50 shown in FIG. 6 has a linear receiver 51, a condensing mirror 53 having a reflecting portion 52 that condenses the linear receiver 51, and the condensing mirror 53 can be rotated.
  • a support base 54 that supports the actuator and an actuator 55 that is attached near the center of the condenser mirror 53 and rotates the condenser mirror 53 are provided.
  • the central axis Q serving as the rotation center of the condensing mirror 53 is located near the center of the condensing mirror 53 when viewed from the side of the condensing mirror 53.
  • an object of the present invention is to provide a solar condensing system and a solar thermal power generation system that can efficiently arrange a plurality of rows of condensing mirrors.
  • the present invention is a trough-type solar condensing system including a plurality of condensing mirror rows each having a reflecting portion that condenses a linearly extending receiver.
  • the mirror is configured to be rotatable or swingable about a central axis extending along the receiver, and the central axis is an end portion farthest from the central axis in the collecting mirror in a direction orthogonal to the central axis. It is characterized in that the linear distance between the outer edge and the central axis is minimized.
  • this solar condensing system since the rotational diameter of the condensing mirror can be reduced, multiple rows of condensing mirrors can be arranged at short intervals without causing mechanical interference due to rotation or swinging. Multiple rows of collecting mirrors can be arranged efficiently. Therefore, according to this solar condensing system, since the ratio of the light beam area received by the condensing mirror to the land area to be used can be increased, solar heat can be obtained efficiently.
  • the cross section perpendicular to the central axis of the reflecting portion may have a parabolic shape with the receiver as a focal point. According to this solar condensing system, sunlight incident from the front of the condensing mirror can be effectively condensed on the receiver, so that solar heat can be obtained more efficiently.
  • the present invention is a trough solar power generator that includes a plurality of condenser mirror rows each having a reflecting portion that collects light with respect to a linearly extending receiver, and that generates power using heat obtained by the receiver through light collection.
  • the light collecting mirror is configured to be rotatable or swingable about a central axis extending along the receiver, and the central axis is a central axis of the collecting mirrors in a direction perpendicular to the central axis. It is located so that the linear distance of the outer edge edge used as the edge part which is furthest away from the center axis and the central axis may be minimized.
  • this solar thermal power generation system since the rotational radius of the condensing mirror can be reduced, multiple rows of condensing mirrors can be arranged at short intervals without causing mechanical interference due to rotation or swinging. Multiple rows of collecting mirrors can be arranged efficiently. Therefore, according to this solar thermal power generation system, the ratio of the luminous flux area received by the condensing mirror to the land area can be increased, so that highly efficient solar thermal power generation can be realized.
  • a plurality of rows of collecting mirrors can be efficiently arranged.
  • FIG. 1 It is a perspective view which shows one Embodiment of the solar condensing system in the solar thermal power generation system which concerns on this invention. It is a side view which shows the solar condensing system of FIG. (A) It is a figure for demonstrating the condensing state when the altitude of the sun is high. (B) It is a figure for demonstrating the schematic relationship of E and G shown to Fig.3 (a). It is a figure for demonstrating the condensing state when the altitude of the sun is low. It is a graph which shows the relationship between the light energy for one day per unit area, and the clearance ratio of a condensing mirror row
  • the solar thermal power generation system which concerns on this embodiment is a system which produces electric power using the solar heat obtained by condensing sunlight
  • the solar condensing system 10 which condenses sunlight is comprised. I have.
  • the solar condensing system 10 is a so-called trough-type condensing system, and includes a plurality of rows of condensing mirrors 13 each having a bowl-shaped reflecting portion 12 that condenses light on a linearly extending receiver 11. .
  • the receiver 11 is a tube-shaped member through which the heat transport fluid flows, and the heat obtained by the receiver 11 by the light collection by the light collecting mirror 13 is supplied to the power generation facility by the heat transport fluid.
  • the power generation facility is, for example, a steam turbine or a Stirling engine, and generates power using heat supplied through a heat transport fluid.
  • the number of columns of the collector mirror 13 in the solar collector system 10 is determined according to the size of usable land such as several to several tens of columns.
  • description will be given by exemplifying two condensing mirror rows A and B.
  • the condenser mirror rows A and B are each provided with six condenser mirrors 13 and are arranged in parallel to each other.
  • the condensing mirror rows A and B all have the same components except for the arrangement position.
  • the condenser mirror array A will be described.
  • the six condenser mirrors 13 included in the condenser mirror array A share one receiver 11 and are arranged in a straight line.
  • Each condensing mirror 13 is supported on the left and right by a support base 14.
  • the condensing mirror 13 is supported so as to be rotatable about the central axis P in order to change the direction according to the movement of the sun.
  • the receiver 11 rotates integrally with the condenser mirror 13.
  • the central axis P is a virtual axis that extends in parallel along the receiver 11.
  • the condensing mirror 13 includes a reflecting portion 12, a mirror base material 15 that supports the reflecting portion 12, and an arm portion 16 that connects the mirror base material 15 and the support base 14.
  • the reflection unit 12 is configured by, for example, a thin glass or a film mirror in which a metal coating such as Al is applied to a resin, and collects incident sunlight on the receiver 11.
  • the reflecting part 12 has a horizontally long bowl shape for focusing on the linear receiver 11.
  • the reflection unit 12 is curved so as to surround the receiver 11 when viewed from the side of the condensing mirror 13 (the extending direction of the central axis P).
  • the cross section perpendicular to the axis P has a parabolic shape with the receiver 11 as a focal point. According to the condensing mirror 13 having such a reflecting portion 12, sunlight incident from the front of the condensing mirror 13 can be effectively condensed on the receiver 11, so that solar heat can be obtained very efficiently. Can do.
  • the mirror base material 15 is a base material that supports the bowl-shaped reflecting portion 12.
  • the mirror substrate 15 is formed in a bowl shape along the reflecting portion 12.
  • This mirror base material 15 is comprised, for example from metals, such as iron.
  • the arm portion 16 is a pair of plate-like members provided on the left and right sides of the mirror base material 15.
  • the arm portions 16 are fixed to the left and right side surfaces of the mirror base material 15 respectively.
  • the arm portion 16 is rotatably connected to the support base 14.
  • the arm portion 16 has a first connecting plate 16a and a second connecting plate 16b, one end of which is fixed to the mirror base 15 and the other end protruding toward the receiver 11, and a first connecting plate 16a and a second connecting plate 16b. And a third connecting plate 16c that connects the other end side of the first connecting plate 16c.
  • a receiver receiving member 17 that supports the receiver 11 is connected to the third connecting plate 16c.
  • An actuator 20 for rotating the six condenser mirrors 13 of the condenser mirror array A is provided between the support base 14 and the arm portion 16 positioned at the right end of the condenser mirror array A.
  • the actuator 20 can employ various drive mechanisms such as an electric type and a hydraulic type.
  • the actuator 20 can rotate the condenser mirror 13 in an arbitrary direction.
  • the actuator 20 may be rotatable only in one direction.
  • N ⁇ b> 1 and N ⁇ b> 2 shown in FIG. 2 indicate the outer edge ends of the condenser mirror 13.
  • the outer edge end means an end portion of the condenser mirror 13 that is farthest from the central axis P in a direction orthogonal to the central axis P.
  • both ends of the mirror base material 15 in the vertical direction are the outer edge ends N1 and N2.
  • the outer edge varies depending on the shape of the condenser mirror 13, and there may be three or more points depending on the shape.
  • the rotating track K is the outermost rotating track in the collecting mirror 13, and in order to avoid mechanical contact between the collecting mirrors 13 due to rotation, the collecting mirror arrays A and B need to be arranged at intervals that the rotating tracks K do not intersect. is there.
  • the rotation diameter of the rotation track K is indicated by D, and the rotation radius is indicated by R.
  • the central axis P of the condenser mirror 13 is positioned so that the linear distance between the outer edge ends N1 and N2 and the central axis P in the direction orthogonal to the central axis P is minimized.
  • the central axis P is located at the midpoint of the line segment J connecting N1 and N2 that are both ends of the mirror base material 15 in the direction orthogonal to the central axis P. Since the central axis P exists at such a position, the rotation diameter D (rotation radius R) of the condensing mirror 13 can be reduced.
  • H shown in FIG. 2 is the total height of the collecting mirror rows A and B, and L is the row interval between the collecting mirror rows A and B.
  • F is a margin between the rotation path K and the ground
  • W is a margin between the rotation path K of the condenser mirror array A and the rotation path K of the collector mirror array B.
  • F and W are safety margins provided to avoid mechanical interference of the condenser mirror 13 due to rotation.
  • FIG. 3 is a diagram for explaining a light collecting state when the altitude of the sun is high.
  • FIG. 4 is a diagram for explaining a light collecting state when the altitude of the sun is lower than that in FIG. 3.
  • 3 and 4 exemplify and explain three condenser mirror rows A, B, and C.
  • T is sunlight
  • ⁇ is the light flux area of sunlight received by the condenser mirror rows A, B, and C
  • G is the land area used by the condenser mirror rows A, B, and C
  • the luminous flux area of sunlight with respect to G is shown as E.
  • the light flux areas of sunlight received by the condenser mirror rows A, B, and C are indicated by ⁇ 1 to ⁇ 3, and the shaded ranges of the condenser mirror 13 in the front row are indicated as S1 and S2.
  • the condensing mirror rows A, B, and C adjust the rotation angle of the condensing mirror 13 so that the light flux areas ⁇ 1 to ⁇ 3 that receive sunlight T are maximized.
  • the condensing mirror arrays A, B, and C can receive sunlight in the entire range of the respective reflecting portions 12, and there is no difference in the light flux areas ⁇ 1 to ⁇ 3.
  • the luminous flux area E of sunlight falling on the land is small.
  • the sum of the luminous flux areas ⁇ 1 to ⁇ 3 of sunlight received by the condenser mirror rows A, B, and C is small.
  • FIG. 6 is a side view showing the condensing mirror arrays Ap and Bp in the conventional solar condensing system 50.
  • the conventional solar condensing system 50 is such that the central axis Q of the condensing mirror 53 is located near the center of the mirror base material 56 when viewed from the side of the condensing mirror 53.
  • the point that the receiver receiving member 57 is directly fixed to the mirror base 56 is mainly different from the solar condensing system 10 according to the present embodiment.
  • the receiver 51, the reflection part 52, and the support stand 54 have the same structure as the receiver 11, the reflection part 12, and the support stand 14 in the solar condensing system 10.
  • the total height of the collecting mirror arrays Ap and Bp of the conventional solar collecting system 50 is Hp
  • the rotating diameter of the collecting mirror 53 is Dp
  • the rotating radius of the collecting mirror 53 is Rp
  • the outer edge of the collecting mirror 53 The ends are represented by Np1, Np2
  • the margin between the rotation trajectory Kp and the ground is represented by Fp
  • the line segment connecting the outer edge ends Np1, Np2 is represented by Jp.
  • the interval between the collecting mirror rows Ap and Bp is indicated by Lp
  • the margin between the rotating orbit Kp of the collecting mirror row Ap and the rotating orbit Kp of the collecting mirror row Bp is indicated by Wp.
  • the margin F in FIG. 2 and the margin Fp in FIG. 6 and the margin W in FIG. 2 and the margin Wp in FIG. 6 are safety margins provided to avoid mechanical interference due to rotation and have the same value.
  • the line segment J connecting the outer edge ends N1 and N2 in FIG. 2 and the line segment Jp connecting the outer edge ends Np1 and Np2 in FIG. 6 have the same length.
  • the outer edge N ⁇ b> 1 that is the end farthest from the central axis P among the condensing mirrors 13 in the direction orthogonal to the central axis P. , N2 and the central axis P are located so that the linear distance is minimized, the rotational diameter Dp (rotational radius Rp) of the condensing mirror 53 in the conventional solar concentrating system 50 shown in FIG. ), The rotation diameter D (rotation radius R) of the condenser mirror 13 can be reduced.
  • FIG. 5 is a graph showing the relationship between the light energy for one day per unit area and the gap ratio of the condenser mirror rows.
  • the daily light energy per unit area is the amount of direct solar radiation DNI [Direct Normal Irradiance] per unit area when the solar condensing system is placed on a land of 1200 (kWh / m 2 ). It is the light energy (calorie
  • the gap ratio is a ratio between the row intervals of the plurality of rows of collecting mirrors and the width of the collecting mirror. For example, when the value of the gap ratio is 1, it means that the column intervals of the condenser mirrors are arranged to be equal to the width of the condenser mirrors.
  • the smaller the gap ratio the greater the light energy that can be obtained by the system.
  • the gap ratio is 5 or more and 1 or less, the obtained light energy is twice or more larger.
  • the conventional sun in which the condensing mirror rows are arranged at a high gap ratio due to mechanical interference and shadowing problems of the front and rear condensing mirror rows due to rotation.
  • the light collecting mirror row can be arranged with a very small gap ratio, so that the light energy can be efficiently collected.
  • the total height H of the condensing mirror rows A and B is made lower than the total height Hp of the conventional condensing mirror rows Ap and Bp. Can do. That is, the height of the receiver 11 can be set lower than that of the conventional solar cell system. For this reason, according to the solar condensing system 10, since the position of the receiver 11 can be brought close to the ground warmed by sunlight, the heat loss in the receiver 11 can be reduced by the thermal energy received from the ground side. become. Therefore, according to this solar condensing system 10, since the heat acquisition efficiency by the receiver 11 and the heat transport efficiency of the heat transport fluid in the receiver 11 can be increased, efficient use of solar heat can be realized. .
  • the condensing mirror 13 of multiple rows can be efficiently arrange
  • a condensing mirror is used with respect to the land area to be used.
  • the ratio of the area of the light flux received by 13 can be increased, and high-efficiency solar thermal power generation can be realized.
  • the present invention is not limited to the embodiment described above.
  • the solar condensing system 10 is not limited to use for solar thermal power generation.
  • Hot water supply using solar heat, steam supply, heating air conditioning, cooling air conditioning (high temperature heat source of absorption refrigeration machine) can be used in various fields. It is particularly suitable for applications such as factory air conditioning and steam supply in medium-scale plants.
  • it can also utilize as a concentrating solar cell system by arrange
  • the condensing mirror 13 is not necessarily configured to be capable of rotating 360 degrees, and may be configured to be swingable. In this case, since it is not necessary to provide a rotation space directly below the condenser mirror 13, the height of the condenser mirror rows A and B can be further reduced.
  • the reflecting part 12 of the condensing mirror 13 of the solar condensing system 10 does not necessarily have a parabolic cross section.
  • the reflection part 12 may have a flat part, and may be what is called a Fresnel type mirror shape.
  • the condensing mirror described in the claims includes various members that rotate integrally with the reflecting portion, except for the receiver and the like.
  • the support frame is also included in the condensing mirror, and the end of the support frame becomes the outer edge end described in the claims. obtain.
  • It can be used as a solar condensing system and a solar thermal power generation system that can efficiently arrange multiple rows of condensing mirrors.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Sustainable Energy (AREA)
  • Astronomy & Astrophysics (AREA)
  • Photovoltaic Devices (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention porte sur un système de collecte de lumière solaire et sur un système de génération d'énergie électrique thermique solaire, lesquels sont configurés de telle sorte que des rangées de miroirs de collecte de lumière peuvent être disposées de façon efficace. Ce système de collecte de lumière solaire du type à auges (10) comporte des rangées (A, B) de miroirs de collecte de lumière (13) ayant des sections de réflexion (12) pour concentrer une lumière sur des récepteurs s'étendant de façon rectiligne (11). Les miroirs de collecte de lumière (13) sont configurés de façon à être aptes à tourner ou à pivoter autour des axes centraux (P) s'étendant le long des récepteurs (11). Chacun des axes centraux (P) est positionné de telle manière que la distance rectiligne dans la direction perpendiculaire à l'axe central (P), mesurée entre l'axe central (P) et chacun des bords externes (N1, N2) de chacun des miroirs de collecte de lumière (13), est la plus petite, les bords externes (N1, N2) étant les extrémités les plus éloignées du miroir de collecte de lumière (13) par rapport à l'axe central (P). Le système de collecte de lumière solaire (10) permet au diamètre (D) de rotation des miroirs de collecte de lumière (13) d'être réduit, et ceci permet aux rangées de miroirs de collecte de lumière (13) d'être disposées à un petit intervalle à l'intérieur d'une plage qui ne provoque pas d'interférence mécanique due à la rotation ou au pivotement. En résultat, les miroirs de collecte de lumière (13) peuvent être disposés de façon efficace.
PCT/JP2012/062498 2011-07-06 2012-05-16 Système de collecte de lumière solaire et système de génération d'énergie électrique thermique solaire WO2013005479A1 (fr)

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JP2011150359A JP2013015304A (ja) 2011-07-06 2011-07-06 太陽集光システム及び太陽熱発電システム
JP2011-150359 2011-07-06

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JP6304975B2 (ja) * 2013-09-03 2018-04-04 株式会社東芝 太陽熱集熱装置
US9985156B2 (en) * 2013-11-01 2018-05-29 UNIVERSITé LAVAL Optical concentrator/diffuser using graded index waveguide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210463A (en) * 1977-07-11 1980-07-01 Escher William J D Multimode solar energy collector and process
JP2008039367A (ja) * 2006-08-10 2008-02-21 Kawasaki Heavy Ind Ltd 太陽熱発電設備および熱媒体供給設備
JP2009522534A (ja) * 2006-01-06 2009-06-11 エヌイーピー・ソーラー・プロプライエタリー・リミテッド 太陽エネルギー収集システム用の反射器及び太陽エネルギー収集システム

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1003504A3 (nl) * 1989-09-04 1992-04-07 Ven Irja Spiegelkonstruktie voor het opvangen en koncentreren van zonnestraling.
DE602006013887D1 (de) * 2006-03-28 2010-06-02 Rahmi Oguz Capan Parabolsolarrinnensysteme mit dreh-nachführungsmittel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210463A (en) * 1977-07-11 1980-07-01 Escher William J D Multimode solar energy collector and process
JP2009522534A (ja) * 2006-01-06 2009-06-11 エヌイーピー・ソーラー・プロプライエタリー・リミテッド 太陽エネルギー収集システム用の反射器及び太陽エネルギー収集システム
JP2008039367A (ja) * 2006-08-10 2008-02-21 Kawasaki Heavy Ind Ltd 太陽熱発電設備および熱媒体供給設備

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