WO2017121178A1 - 2d-tracking solar concentrator - Google Patents

2d-tracking solar concentrator Download PDF

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Publication number
WO2017121178A1
WO2017121178A1 PCT/CN2016/104680 CN2016104680W WO2017121178A1 WO 2017121178 A1 WO2017121178 A1 WO 2017121178A1 CN 2016104680 W CN2016104680 W CN 2016104680W WO 2017121178 A1 WO2017121178 A1 WO 2017121178A1
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WO
WIPO (PCT)
Prior art keywords
tube
solar
collecting tube
concentrating device
dimensional tracking
Prior art date
Application number
PCT/CN2016/104680
Other languages
French (fr)
Chinese (zh)
Inventor
徐盛之
徐鸿盛
Original Assignee
徐盛之
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Publication date
Application filed by 徐盛之 filed Critical 徐盛之
Publication of WO2017121178A1 publication Critical patent/WO2017121178A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/71Arrangements for concentrating solar-rays for solar heat collectors with reflectors with parabolic reflective surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/30Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/70Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00Arrangements for moving or orienting solar heat collector modules
    • F24S30/40Arrangements for moving or orienting solar heat collector modules for rotary movement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00Arrangements for moving or orienting solar heat collector modules
    • F24S30/40Arrangements for moving or orienting solar heat collector modules for rotary movement
    • F24S30/42Arrangements for moving or orienting solar heat collector modules for rotary movement with only one rotation axis
    • F24S30/425Horizontal axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00Arrangements for controlling solar heat collectors
    • F24S50/20Arrangements for controlling solar heat collectors for tracking
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/83Other shapes
    • F24S2023/834Other shapes trough-shaped
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/47Mountings or tracking

Definitions

  • the present invention relates to the field of solar energy applications, and more particularly to a two-dimensional tracking solar concentrating device.
  • the tracking concentrating devices applied by solar energy are mainly trough parabolic tracking concentrating devices and tower-type heliostat concentrating tracking devices.
  • the working condition is that in the northern hemisphere, the mirror is usually facing south, and the longer two mirrored groove sides are placed in the east-west direction.
  • the tracking device adjusts the angle between the curved surface of the curved surface and the horizontal line in the north-south direction, so as to track the change of the solar elevation angle, so that the sunlight enters the mirror surface from the east side, the sunlight from the front surface to the mirror surface at noon, and the afternoon from the afternoon.
  • the sunlight incident on the mirror side of the west side is reflected to the solar vacuum heat collecting tube at the focus position.
  • Current solar vacuum heat collecting tubes include an inner tube and an outer tube.
  • the outer surface of the inner tube is coated with a heat absorbing film, and the outer tube is a transparent glass cover tube.
  • the working tube temperature is up to several hundred degrees Celsius, while the outer tube is at ambient temperature. If both the inner and outer tubes are made of glass and the outer tube is welded at the ends of the two jaws, the expansion of the inner tube will cause the glass tube to rupture. Therefore, the all-glass solar vacuum heat collecting tube is made into a structure with one end opening.
  • the inner tube of the glass metal solar vacuum heat collecting tube at both ends of the mouth adopts a metal tube, and the metal tube is connected with a small metal bellows for buffering the displacement generated by the expansion of the inner tube.
  • a glass and metal hot melt material is respectively used at the two ports to weld adjacent outer tubes and inner tubes to form a long solar vacuum heat collecting tube.
  • the current trough parabolic concentrating tracking device has a large concentrating mirror area, and generally has a groove surface width of 3-8 meters, and two parallel groove sides are tens of meters to 100 meters long. In this case, only straight-through glass-metal solar vacuum heat collecting tubes with two ends of the mouth can be used for serial connection, wherein each tube is 3-6 meters long.
  • the heat transfer medium (heat transfer oil) flows in from one end, and is heated to flow out from the other end. Due to the high requirements on the materials and processes of glass and metal hot-melt sealing due to the glass-metal solar vacuum heat collecting tubes at both ends, the domestic products are not technically relevant, and the foreign products are very expensive. This increases the production cost of the trough parabolic tracking concentrating device, and thus the trough parabolic tracking concentrating device has been available for decades but has not been effectively promoted.
  • a tower solar photovoltaic power generation device and a tower solar thermal power generation device mount a plurality of heliostats around a tower column.
  • the strength of the pair of columns is very high, but the column does not fit too much heliostat. Since investment costs are difficult to recycle, they are less used.
  • the technical problem to be solved by the present invention is that the slotted parabolic concentrating tracking device of the prior art cannot perform the omnidirectional tracking of the defects of sunlight, and provides a two-dimensional tracking solar concentrating device, which can perform sunlight on the light. Full tracking.
  • the technical solution adopted by the present invention to solve the technical problem thereof is: constructing a two-dimensional tracking solar concentrating device, comprising: a bracket;
  • an outer frame mounted on a top of the bracket by a first bearing and rotatable relative to the bracket about an axis extending in the east-west direction;
  • a condensing mirror having a circular arc-shaped reflecting surface, mounted in the outer frame by a second bearing, and rotatable relative to the outer frame about an axis extending in a north-south direction; and a solar heat collecting tube fixed to the The focus position of the condenser.
  • the solar heat collecting tube comprises a vacuum collecting tube with one end opening, one end closed, and a metal heat exchange tube disposed in the vacuum heat collecting tube; The two ends of the metal heat exchange tube are closed, and the heat transfer oil inlet pipe and the heat transfer oil outlet pipe are connected near the mouth end of the vacuum heat collecting pipe.
  • the vacuum heat collecting tube includes a cover glass tube, And a heat absorbing glass tube disposed in the cover glass tube, wherein a vacuum is drawn between the cover glass tube and the heat absorbing glass tube; and an outer layer of the heat absorbing glass tube is coated with a heat absorbing film.
  • the oil inlet pipe is interposed at the bottom of the metal heat exchange tube.
  • the reflecting surface is located in a circular arc segment
  • the solar heat collecting tube is disposed on a symmetrical central axis OC of the reflecting surface; the circular arc segment
  • the center of the circle is 0, the radius is R, and the XOY plane rectangular coordinate system is established with the point 0 as the origin.
  • the cross-sectional shape of the solar heat collecting tube is a circle 0', and an in-line isosceles right triangle DEF is made in the circle 0'.
  • the vertex D of the isosceles right triangle DEF is located on the symmetry center axis OC and the Y axis of the condensing mirror 103, and faces the condensing mirror.
  • the coordinates of the D point are (0, b), 0.47R ⁇ b ⁇ 0.98R.
  • the cross-section of the solar heat collecting tube is an inverted isosceles triangle, and the solar heat collecting tube is made of metal;
  • the outer tube wall of the symmetrical side faces the concentrating mirror and is affixed with single crystal silicon or polycrystalline silicon.
  • the bracket includes a bottom support portion having a rectangular frame shape, and an end support portion symmetrically coupled to both ends of the bottom support portion in an east-west direction, The end support portion and the bottom support portion together form an isosceles triangle.
  • the curved surface of the condensing mirror is a grooved arc surface or a grooved paraboloid, and includes a groove edge, and the groove edge extends along a north-south direction.
  • the two-dimensional tracking solar concentrating device embodying the present invention has the following beneficial effects: With the same area of the condensing mirror, the solar illuminating device of the two-dimensional tracking solar concentrating device of the present invention receives one-day tracking solar energy.
  • the concentrating device is 1.6 times, thus reducing the investment cost of solar energy utilization.
  • a smaller area of the concentrating mirror can be used, which has a shorter mirror length. In this way, a solar vacuum heat collecting tube with one end of the mouth can be used, and it is not necessary to use the solar heat collecting tubes with both ends of the mouth for docking. This drastically reduces production costs.
  • FIG. 1 is a schematic structural view of a two-dimensional tracking solar concentrating device according to a first embodiment of the present invention
  • FIG. 2 is a front elevational view of a stent in accordance with a first embodiment of the present invention
  • FIG. 3 is a cross-sectional view of a two-dimensional tracking solar concentrating device in accordance with a first embodiment of the present invention
  • FIG. 4 is a cross-sectional view of a solar heat collecting tube according to a first embodiment of the present invention
  • FIG. 5 is a light path diagram of a two-dimensional tracking solar concentrating device according to a first embodiment of the present invention.
  • FIG. 6 is a light path diagram of a two-dimensional tracking solar concentrating device according to a second embodiment of the present invention.
  • FIG. 7 is a light path diagram of a two-dimensional tracking solar concentrating device according to a third embodiment of the present invention.
  • FIG. 1 is a schematic structural view of a two-dimensional tracking solar concentrating device 100 according to a first embodiment of the present invention.
  • Figure 2 is a front elevational view of a stent 101 in accordance with a first embodiment of the present invention.
  • 3 is a side view of a two-dimensional tracking solar concentrating device 100 in accordance with a first embodiment of the present invention.
  • the two-dimensional tracking solar concentrating device 100 of the present invention comprises a bracket 101, an outer frame 102 mounted on the top of the bracket 101, and connected to the outer frame 1.
  • the bracket 101 can be any suitable shape.
  • the bracket 101 includes a bottom support portion 101a having a substantially rectangular frame shape, and an end support portion 101b symmetrically coupled to both ends of the bottom support portion 101a in the east-west direction.
  • the end support portion 101b and the bottom support portion 101a together form an isosceles triangle.
  • a connecting portion 101c for connecting the middle portions of the two end support portions 101b to achieve a more stable structure.
  • the outer frame 102 is rotatably mounted on the top of the bracket 101 so as to be rotatable relative to the bracket 101 about an axis extending in the east-west direction.
  • a pair of first bearings 105 are provided on the top of the bracket 101.
  • the first bearing 105 may be disposed at the top of the end support portion 101b, respectively.
  • the middle portions of the two long sides of the outer frame 102 are rotatably coupled to the top of the bracket 101 via the first bearing 105. Where the long side extends along the north-south direction
  • the reflecting surface of the condensing mirror 103 may be a grooved circular surface or a grooved paraboloid whose projection is rectangular in a direction perpendicular to the east and west and the north and south.
  • the rectangle includes a long side and a short side, the long side is the groove side, and the short side is the projection of the curved end of the concentrating mirror.
  • the groove edge extends toward the north-south direction.
  • a reflective film is plated on the surface of the condensing mirror 103.
  • the reflecting surface of the condensing mirror 103 of the present invention is preferably a grooved arc surface.
  • the concentrating mirror 103 of this shape has the following advantages: (1) a simple manufacturing process and low cost; (2) curvature of each point of the circular arc reflecting surface The radius is the same, the reflective surface is affected by the temperature during use, and the heat is increased and contracted. The stress at each point is the same without deformation.
  • the trough parabola has the following disadvantages: (1) The curvature radius of each point of the reflecting surface is different, the manufacturing process is complicated and the cost is high; (2) The curvature radius of each point of the reflecting surface is different, and the temperature is affected by the heat during use. The temperature rises and contracts, the stress at each point is different, and it is easy to deform, which seriously affects the concentrating effect of the condensing mirror 103.
  • the condensing mirror 103 is rotatably mounted within the outer frame 102 and rotatable relative to the outer frame 102 about an axis extending in a north-south direction. Specifically, at the top of the outer frame 102, a pair of second bearings 106 are provided. The second bearings 106 may be disposed on top of the two short sides of the outer frame 102, respectively. The curved end of the condensing mirror 103 is rotatably coupled within the outer frame 102 by a second bearing 103.
  • the long side and the short side of the condensing mirror 103 are shorter than the long side and the short side of the outer frame 102, respectively, and the long side and the short side of the condensing mirror 103 respectively and the long side of the adjacent outer frame 102, There is a gap between the short sides.
  • the condensing mirror 103 can rotate in the outer frame 102 along an axis extending in the north-south direction without interfering with the outer frame 102.
  • the concentrating mirror 103 is disposed in the bracket 101, and its center of gravity is lowered, which can save the material of the bracket 101 and save cost.
  • the solar heat collecting tube 104 is fixed at a focus position of the condensing mirror 103 by a high temperature vacuum tube holder 107 to collect energy.
  • the solar heat collecting tube 104 is a solar vacuum heat collecting tube.
  • the solar vacuum heat collecting tube 104 includes a vacuum heat collecting tube 108 closed at one end, closed at one end, and a metal heat exchange tube 109 disposed in the vacuum heat collecting tube 108.
  • the vacuum heat collecting tube 108 includes a cover glass tube 108a, and a heat absorbing glass tube 108b disposed in the cover glass tube 108a, and a vacuum is applied between the cover glass tube 108a and the heat absorbing glass tube 108b.
  • a heat absorbing film is plated on the outer layer of the endothermic glass tube 108b. Both ends of the metal heat exchange tube 109 are closed, and at a mouth end close to the vacuum heat collecting tube 108, the heat transfer oil inlet pipe 110 and the heat transfer oil outlet pipe 111 are connected. Preferably, the heat transfer oil inlet pipe 110 is inserted in the metal heat exchange tube 109 and extends to the bottom of the metal heat exchange tube 109.
  • the two-dimensional tracking solar concentrating device 100 further includes a pump for pumping the heat transfer oil to circulate it.
  • the solar vacuum heat collecting tube 104 is placed at the focus position of the condensing mirror 103, and the energy collected by the condensing mirror 103 is reflected to the solar vacuum heat collecting tube 104 and absorbed by the heat absorbing glass tube 108b.
  • the energy absorbed by the endothermic glass tube 108b is transferred to the metal heat exchange tube 109.
  • the heat transfer oil enters the metal heat exchange tube 109 through the heat transfer oil inlet pipe 110, and flows from the bottom of the metal heat exchange tube 109 to the heat transfer oil outlet pipe 111 at the nip end of the metal heat exchange tube 109, and finally from the heat transfer oil discharge pipe 111. Flow out.
  • the heat transfer oil absorbs heat sufficiently in the metal heat exchange tube 109, and the temperature rises, and the heat can be further transmitted after flowing out.
  • the mouth end of the solar vacuum heat collecting tube 104 faces south. This is because most of China's area is north of 23.5 degrees north latitude, and even if the sun goes from the south to the concentrating mirror 103, the south end is lower, which prevents rainwater from entering the interior of the solar vacuum heat collecting tube 104.
  • the solar heat collecting tube 104 is a light hot water tube having an inverted isosceles triangle in cross section and made of metal.
  • the bottom edge of the isosceles triangle faces the sun, and the outer wall of the two symmetrical sides faces the concentrating mirror 103, and single crystal silicon or polysilicon 112 is pasted.
  • the energy collected by the condensing mirror 103 is reflected onto the single crystal silicon or polysilicon 112, one for power generation and the other for heat. It can be transferred to the pipe wall and further transferred to the water in the light hot water pipe to heat the water and provide domestic hot water.
  • the solar concentrating device 100 further includes a light sensor, and an axis for driving the outer frame 102 to rotate about the east-west axis and driving the condensing mirror 103 around the north-south direction. Rotating drive.
  • the light sensor is electrically connected to the driving device so that the driving device can work according to the light sensed by the light sensor. This enables the solar concentrating device 100 to track the sunlight in the east-west direction during the day, and to track the sunlight in the north-south direction, so that the sunlight can always vertically illuminate the plane formed by the two groove sides of the condensing mirror 103. on. This solar concentrating device tends to stabilize the irradiance of sunlight received at various stages of the day.
  • the two-dimensional tracking solar concentrating device 100 of the present invention receives 1.6 times the amount of solar radiation of the one-dimensional tracking solar concentrating device, thereby reducing the utilization of solar energy. cost of investment.
  • a smaller area of the concentrating mirror 103 can be employed.
  • an illuminating mirror of Im2-15m2 is used, and 10-20 concentrating devices are arranged in a row, driven by a driving device. Since the area of the condensing mirror 103 is small, the mirror length (that is, the length of the two groove sides) is short, usually 1-5 meters long, and the width between the two groove sides is also narrow, generally 0.5-3 meters. width.
  • a solar vacuum heat collecting tube with one end opening can be used, and it is not necessary to use a glass frit solar collector tube with an expensive two-end opening for docking.
  • the all-glass solar vacuum collector tube with one end of the mouth has been used in solar water heaters in China for 20 years, which greatly reduced the production cost.
  • FIG. 5 is a light path diagram of a two-dimensional tracking solar concentrating device 100 according to a first embodiment of the present invention. As shown in FIG. 5, in this embodiment, the reflecting surface of the condensing mirror 103 is located on a circular arc segment.
  • the solar collector tube 104 is disposed on the symmetrical central axis OC of the reflecting surface.
  • the center of the circle is 0 and the radius is R.
  • the XOY plane rectangular coordinate system is established with the point 0 as the origin.
  • Solar collector The cross-sectional shape of the tube 104 is a circle in which an isosceles right triangle DEF is formed, and the vertex D of the isosceles right triangle DEF is located on the symmetry center axis OC of the condensing mirror 103 and faces the condensing mirror 103.
  • the coordinates of point D are (0, b).
  • Point D is the intersection of the cross section of the solar heat collecting tube 104 and the Y axis.
  • point D is the intersection of the cross section of the heat absorbing glass tube 108b and the Y axis.
  • the straight line equation is:
  • the incident ray is incident on the circular arc segment perpendicular to the chord GH
  • the coordinates of the two ends of the string GH are G (Xg, Yg), H (- Xg, Yg), the reflection point is I, the coordinate is I (Xi, Yi), the normal is 01, and the reflection arc segment
  • optical path diagram shown in FIG. 5 is also applicable to the second embodiment shown in FIG. 6.
  • the solar heat collecting tube 104 is a light hot water pipe having a rectangular cross section and made of metal.
  • the outer tube wall of the bottom side of the rectangle faces the condensing mirror 103, and single crystal silicon or polysilicon 112 is pasted.
  • the energy collected by the condensing mirror 103 is reflected onto the single crystal silicon or polysilicon 112, one part is used for power generation, and the other part is converted into heat energy to the tube wall, and further transferred to the water in the light hot water tube to heat the water, providing Hot water for living. It has been experimentally proven that solar collector tubes 104 of this shape can also efficiently collect energy.
  • the two-dimensional tracking solar concentrating device 100 of the present invention can perform omnidirectional tracking of sunlight, and can adopt a solar vacuum heat collecting tube 104 with one end opening, thereby reducing the production cost.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • 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)
  • Photovoltaic Devices (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

A 2D-tracking solar concentrator (100) comprises: a support frame (101); an outer frame (102) mounted to an upper portion of the support frame (101) via a first bearing (105), and rotatable about an axis extending in the east-west direction and with respect to the support frame (101); a concentrating mirror (103) having an arch-shaped reflective surface, mounted in the outer frame (102) via a second bearing (106), and rotatable about an axis extending in the south-north direction and with respect to the outer frame (102); and a solar collector (104) fixed at a focus position of the concentrating mirror (103). The 2D-tracking solar concentrator (100) can achieve omnidirectional tracking of sunlight, and employ an evacuated tube solar collector open at one end, thus lowering manufacturing costs.

Description

说明书 发明名称:二维跟踪太阳能聚光装置 技术领域  Specification Name of Invention: Two-dimensional tracking solar concentrating device Technical field
[0001] 本发明涉及太阳能应用领域, 更具体地说, 涉及二维跟踪太阳能聚光装置。  [0001] The present invention relates to the field of solar energy applications, and more particularly to a two-dimensional tracking solar concentrating device.
背景技术  Background technique
[0002] 太阳能作为一种环保能源, 已经得到了广泛的应用。 目前太阳能所应用的跟踪 聚光装置主要是槽式抛物面跟踪聚光装置和塔式的定日镜聚光跟踪装置。  [0002] Solar energy has been widely used as an environmentally friendly energy source. At present, the tracking concentrating devices applied by solar energy are mainly trough parabolic tracking concentrating devices and tower-type heliostat concentrating tracking devices.
[0003] 目前的槽式抛物面聚光跟踪装置大多是一维跟踪的, 通常用于太阳能热发电。  [0003] Current trough parabolic concentrating tracking devices are mostly one-dimensionally tracked and are commonly used for solar thermal power generation.
其工作状况是在北半球通常镜面向南, 较长的两条镜面槽边朝东西方向放置。 通过跟踪装置调整曲面镜面与南北方向的水平线夹角, 从而跟踪太阳高度角的 变化, 使太阳光上午从东侧射入到镜面上的阳光、 中午从正面射入到镜面上的 阳光以及下午从西侧射入到镜面上的阳光都反射到聚焦位置处的太阳能真空集 热管上。 其缺陷是:  The working condition is that in the northern hemisphere, the mirror is usually facing south, and the longer two mirrored groove sides are placed in the east-west direction. The tracking device adjusts the angle between the curved surface of the curved surface and the horizontal line in the north-south direction, so as to track the change of the solar elevation angle, so that the sunlight enters the mirror surface from the east side, the sunlight from the front surface to the mirror surface at noon, and the afternoon from the afternoon. The sunlight incident on the mirror side of the west side is reflected to the solar vacuum heat collecting tube at the focus position. The drawbacks are:
[0004] 白天一日之中聚光镜面所接收的太阳光辐照强度差别很大, 由早上最弱逐步增 强, 至中午最强, 再逐步转弱, 至傍晚最弱。 这对光热利用的稳定性不利, 尤 其是太阳能热发电。  [0004] The intensity of sunlight received by the condenser mirror during daytime varies greatly, from the weakest in the morning to the strongest at noon, and then gradually weakens to the weakest in the evening. This is detrimental to the stability of photothermal utilization, especially solar thermal power generation.
[0005] 也有将两条较长的镜面槽边南北方向陈放、 聚光镜面东西方向转动跟踪太阳光 的先例, 虽然夏季镜面接收的太阳辐照量较多, 但冬季太阳偏南, 所以镜面接 受的太阳辐照量较少。 尤其在北方地区, 冬季太阳光的入射角度很斜, 镜面接 受的太阳辐照量很小。  [0005] There are also precedents for two long mirror-slots to be placed in the north-south direction, and the condenser mirror is rotated in the east-west direction to track the sunlight. Although the summer mirror receives more solar radiation, the winter sun is southerly, so the mirror is accepted. The amount of solar radiation is small. Especially in the north, the angle of incidence of winter sunlight is very oblique, and the amount of solar radiation received by the mirror is small.
[0006] 目前的太阳能真空集热管包括内管和外管。 内管的外表面涂有吸热膜, 外管是 透明的玻璃罩管。 工作吋内管温度高达几百摄氏度, 而外管处于环境温度。 若 内外管都采用玻璃材料而外管在两幵口端处熔接封口, 则内管膨胀会导致玻璃 管破裂。 因此全玻璃的太阳能真空集热管都制成一端幵口的结构。  [0006] Current solar vacuum heat collecting tubes include an inner tube and an outer tube. The outer surface of the inner tube is coated with a heat absorbing film, and the outer tube is a transparent glass cover tube. The working tube temperature is up to several hundred degrees Celsius, while the outer tube is at ambient temperature. If both the inner and outer tubes are made of glass and the outer tube is welded at the ends of the two jaws, the expansion of the inner tube will cause the glass tube to rupture. Therefore, the all-glass solar vacuum heat collecting tube is made into a structure with one end opening.
[0007] 两端幵口的玻璃金属太阳能真空集热管的内管采用了金属管, 金属管连接一小 段金属波纹管, 用以缓冲内管膨胀吋产生的位移。 两端口处分别采用玻璃、 金 属热熔材料来熔接相邻的外管和内管, 以连接形成较长的太阳能真空集热管。 [0008] 目前的槽式抛物面聚光跟踪装置的聚光镜面积大, 通常槽面宽度为 3-8米, 两 条平行的槽边长几十米至百米。 这种情况下只能采用两端幵口的直通式玻璃金 属太阳能真空集热管进行串接, 其中每支管长 3-6米。 传热介质 (导热油) 从一 端流进, 升温后由另一端流出。 由于两端幵口的玻璃金属太阳能真空集热管对 玻璃、 金属热熔封接的材料和工艺要求很高, 而国内的产品在技术上还不过关 , 国外的产品价格非常昂贵。 这增加了槽式抛物面跟踪聚光装置的生产成本, 因而槽式抛物面跟踪聚光装置面世几十年但仍未得到有效的推广。 [0007] The inner tube of the glass metal solar vacuum heat collecting tube at both ends of the mouth adopts a metal tube, and the metal tube is connected with a small metal bellows for buffering the displacement generated by the expansion of the inner tube. A glass and metal hot melt material is respectively used at the two ports to weld adjacent outer tubes and inner tubes to form a long solar vacuum heat collecting tube. [0008] The current trough parabolic concentrating tracking device has a large concentrating mirror area, and generally has a groove surface width of 3-8 meters, and two parallel groove sides are tens of meters to 100 meters long. In this case, only straight-through glass-metal solar vacuum heat collecting tubes with two ends of the mouth can be used for serial connection, wherein each tube is 3-6 meters long. The heat transfer medium (heat transfer oil) flows in from one end, and is heated to flow out from the other end. Due to the high requirements on the materials and processes of glass and metal hot-melt sealing due to the glass-metal solar vacuum heat collecting tubes at both ends, the domestic products are not technically relevant, and the foreign products are very expensive. This increases the production cost of the trough parabolic tracking concentrating device, and thus the trough parabolic tracking concentrating device has been available for decades but has not been effectively promoted.
[0009] 塔式太阳能光伏发电装置和塔式太阳能热发电装置将多个定日镜安装在塔身立 柱的四周。 这对立柱的强度要求很高, 但是立柱又装不了太大面积的定日镜。 由于投资成本难以回收, 所以较少使用。  [0009] A tower solar photovoltaic power generation device and a tower solar thermal power generation device mount a plurality of heliostats around a tower column. The strength of the pair of columns is very high, but the column does not fit too much heliostat. Since investment costs are difficult to recycle, they are less used.
技术问题  technical problem
[0010] 本发明要解决的技术问题在于, 针对现有技术的槽式抛物面聚光跟踪装置不能 进行全方位跟踪太阳光的缺陷, 提供一种二维跟踪太阳能聚光装置, 可以对太 阳光进行全方位跟踪。  [0010] The technical problem to be solved by the present invention is that the slotted parabolic concentrating tracking device of the prior art cannot perform the omnidirectional tracking of the defects of sunlight, and provides a two-dimensional tracking solar concentrating device, which can perform sunlight on the light. Full tracking.
问题的解决方案  Problem solution
技术解决方案  Technical solution
[0011] 本发明解决其技术问题所采用的技术方案是: 构造一种二维跟踪太阳能聚光装 置, 包括: 支架;  [0011] The technical solution adopted by the present invention to solve the technical problem thereof is: constructing a two-dimensional tracking solar concentrating device, comprising: a bracket;
[0012] 外框, 通过第一轴承安装在所述支架的顶部且可绕着东西方向延伸的轴线相对 于所述支架转动;  [0012] an outer frame, mounted on a top of the bracket by a first bearing and rotatable relative to the bracket about an axis extending in the east-west direction;
[0013] 具有圆弧形反射面的聚光镜, 通过第二轴承安装在所述外框内, 且可绕着南北 方向延伸的轴线相对于所述外框转动; 以及太阳能集热管, 固定在所述聚光镜 的聚焦位置处。  [0013] a condensing mirror having a circular arc-shaped reflecting surface, mounted in the outer frame by a second bearing, and rotatable relative to the outer frame about an axis extending in a north-south direction; and a solar heat collecting tube fixed to the The focus position of the condenser.
[0014] 根据本发明所述的二维跟踪太阳能聚光装置, 所述太阳能集热管包括一端幵口 、 一端封闭的真空集热管、 以及设置在所述真空集热管内的金属换热管; 所述 金属换热管的两端封闭, 且在靠近所述真空集热管的幵口端处连接导热油进油 管和导热油出油管。  [0014] According to the two-dimensional tracking solar concentrating device of the present invention, the solar heat collecting tube comprises a vacuum collecting tube with one end opening, one end closed, and a metal heat exchange tube disposed in the vacuum heat collecting tube; The two ends of the metal heat exchange tube are closed, and the heat transfer oil inlet pipe and the heat transfer oil outlet pipe are connected near the mouth end of the vacuum heat collecting pipe.
[0015] 根据本发明所述的二维跟踪太阳能聚光装置, 所述真空集热管包括罩玻璃管、 以及设置在罩玻璃管内的吸热玻璃管, 所述罩玻璃管和所述吸热玻璃管之间抽 真空; 在所述吸热玻璃管的外层, 镀有吸热膜。 [0015] According to the two-dimensional tracking solar concentrating device of the present invention, the vacuum heat collecting tube includes a cover glass tube, And a heat absorbing glass tube disposed in the cover glass tube, wherein a vacuum is drawn between the cover glass tube and the heat absorbing glass tube; and an outer layer of the heat absorbing glass tube is coated with a heat absorbing film.
[0016] 根据本发明所述的二维跟踪太阳能聚光装置, 所述进油管插置在所述金属换热 管的底部。  [0016] According to the two-dimensional tracking solar concentrating device of the present invention, the oil inlet pipe is interposed at the bottom of the metal heat exchange tube.
[0017] 根据本发明所述的二维跟踪太阳能聚光装置, 所述反射面位于圆弧线段  [0017] According to the two-dimensional tracking solar concentrating device of the present invention, the reflecting surface is located in a circular arc segment
[数] 广、 上, 所述太阳能集热管设置在所述反射面的对称中心轴线 OC上; 所述圆弧线 段  The solar heat collecting tube is disposed on a symmetrical central axis OC of the reflecting surface; the circular arc segment
[数]  [number]
的圆心为 0, 半径为 R, 以点 0为原点建立 XOY平面直角坐标系, 所述太阳能 集热管的截面形状为圆 0', 在所述圆 0 '内作内接等腰直角三角形 DEF, 所述等 腰直角三角形 DEF的顶点 D位于聚光镜 103的对称中心轴线 OC和 Y轴上、 且朝向 所述聚光镜, D点的坐标为 (0, b) , 0.47R≤b≤0.98R。 The center of the circle is 0, the radius is R, and the XOY plane rectangular coordinate system is established with the point 0 as the origin. The cross-sectional shape of the solar heat collecting tube is a circle 0', and an in-line isosceles right triangle DEF is made in the circle 0'. The vertex D of the isosceles right triangle DEF is located on the symmetry center axis OC and the Y axis of the condensing mirror 103, and faces the condensing mirror. The coordinates of the D point are (0, b), 0.47R ≤ b ≤ 0.98R.
[0018] 根据本发明所述的二维跟踪太阳能聚光装置, 所述太阳能集热管的横截面呈倒 置的等腰三角形, 且所述太阳能集热管由金属制成; 所述等腰三角形的两条对 称边的外管壁朝向所述聚光镜, 且粘贴有单晶硅或者多晶硅。  [0018] According to the two-dimensional tracking solar concentrating device of the present invention, the cross-section of the solar heat collecting tube is an inverted isosceles triangle, and the solar heat collecting tube is made of metal; The outer tube wall of the symmetrical side faces the concentrating mirror and is affixed with single crystal silicon or polycrystalline silicon.
[0019] 根据本发明所述的二维跟踪太阳能聚光装置, 所述支架包括呈矩形框状的底部 支撑部、 以及沿东西方向对称地连接在所述底部支撑部两端的端部支撑部, 所 述端部支撑部与所述底部支撑部共同形成等腰三角形。  [0019] According to the two-dimensional tracking solar concentrating device of the present invention, the bracket includes a bottom support portion having a rectangular frame shape, and an end support portion symmetrically coupled to both ends of the bottom support portion in an east-west direction, The end support portion and the bottom support portion together form an isosceles triangle.
[0020] 根据本发明所述的二维跟踪太阳能聚光装置, 所述聚光镜的曲面是槽式圆弧面 或者槽式抛物面, 且包括槽边, 所述槽边沿着南北方向延伸。  [0020] According to the two-dimensional tracking solar concentrating device of the present invention, the curved surface of the condensing mirror is a grooved arc surface or a grooved paraboloid, and includes a groove edge, and the groove edge extends along a north-south direction.
[0021] 根据本发明所述的二维跟踪太阳能聚光装置, 所述聚光镜与所述外框之间留有 间隙。 发明的有益效果 [0021] According to the two-dimensional tracking solar concentrating device of the present invention, a gap is left between the condensing mirror and the outer frame. Advantageous effects of the invention
有益效果  Beneficial effect
[0022] 实施本发明的二维跟踪太阳能聚光装置, 具有以下有益效果: 采用同样面积的 聚光镜, 本发明的二维跟踪太阳能聚光装置一天所接受的太阳辐照量是一维跟 踪的太阳能聚光装置的 1.6倍, 因此降低了太阳能利用的投资成本。 在此基础上 , 为了收集相同的能量, 可以采用较小面积的聚光镜, 其镜面长度较短。 这样 就可以采用一端幵口的太阳能真空集热管, 而不必采用两端幵口的太阳能集热 管进行对接使用。 这大幅降低了生产成本。  [0022] The two-dimensional tracking solar concentrating device embodying the present invention has the following beneficial effects: With the same area of the condensing mirror, the solar illuminating device of the two-dimensional tracking solar concentrating device of the present invention receives one-day tracking solar energy. The concentrating device is 1.6 times, thus reducing the investment cost of solar energy utilization. On this basis, in order to collect the same energy, a smaller area of the concentrating mirror can be used, which has a shorter mirror length. In this way, a solar vacuum heat collecting tube with one end of the mouth can be used, and it is not necessary to use the solar heat collecting tubes with both ends of the mouth for docking. This drastically reduces production costs.
对附图的简要说明  Brief description of the drawing
附图说明  DRAWINGS
[0023] 下面将结合附图及实施例对本发明作进一步说明, 附图中:  [0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:
[0024] 图 1是根据本发明的第一实施例的二维跟踪太阳能聚光装置的结构示意图; 1 is a schematic structural view of a two-dimensional tracking solar concentrating device according to a first embodiment of the present invention;
[0025] 图 2是根据本发明的第一实施例的支架的主视图; 2 is a front elevational view of a stent in accordance with a first embodiment of the present invention;
[0026] 图 3是根据本发明的第一实施例的二维跟踪太阳能聚光装置的截面图;  3 is a cross-sectional view of a two-dimensional tracking solar concentrating device in accordance with a first embodiment of the present invention;
[0027] 图 4是根据本发明的第一实施例的太阳能集热管的剖视图;  4 is a cross-sectional view of a solar heat collecting tube according to a first embodiment of the present invention;
[0028] 图 5是是根据本发明的第一实施例的二维跟踪太阳能聚光装置的光路图;  5 is a light path diagram of a two-dimensional tracking solar concentrating device according to a first embodiment of the present invention;
[0029] 图 6是根据本发明的第二实施例的二维跟踪太阳能聚光装置的光路图;  6 is a light path diagram of a two-dimensional tracking solar concentrating device according to a second embodiment of the present invention;
[0030] 图 7是根据本发明的第三实施例的二维跟踪太阳能聚光装置的光路图。  7 is a light path diagram of a two-dimensional tracking solar concentrating device according to a third embodiment of the present invention.
实施该发明的最佳实施例  BEST MODE FOR CARRYING OUT THE INVENTION
本发明的最佳实施方式  BEST MODE FOR CARRYING OUT THE INVENTION
[0031] 为了使本发明的目的、 技术方案及优点更加清楚明白, 以下结合附图及实施例 , 对本发明进行进一步详细说明。 应当理解, 此处所描述的具体实施例仅仅用 以解释本发明, 并不用于限定本发明。  The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0032] 图 1是根据本发明的第一实施例的二维跟踪太阳能聚光装置 100的结构示意图。  1 is a schematic structural view of a two-dimensional tracking solar concentrating device 100 according to a first embodiment of the present invention.
图 2是根据本发明的第一实施例的支架 101的主视图。 图 3是根据本发明的第一实 施例的二维跟踪太阳能聚光装置 100的侧视图。 如图 1-3所示, 本发明的二维跟踪 太阳能聚光装置 100包括支架 101、 安装在支架 101顶部的外框 102、 连接在外框 1 02内的聚光镜 103、 以及用于收集聚光镜 103所反射的太阳光的太阳能集热管 104 Figure 2 is a front elevational view of a stent 101 in accordance with a first embodiment of the present invention. 3 is a side view of a two-dimensional tracking solar concentrating device 100 in accordance with a first embodiment of the present invention. As shown in FIG. 1-3, the two-dimensional tracking solar concentrating device 100 of the present invention comprises a bracket 101, an outer frame 102 mounted on the top of the bracket 101, and connected to the outer frame 1. A concentrating mirror 103 in 02, and a solar heat collecting tube 104 for collecting sunlight reflected by the condensing mirror 103
[0033] 其中, 支架 101可以是任意合适的形状。 在图示的实施例中, 支架 101包括大体 呈矩形框状的底部支撑部 101a、 以及沿东西方向对称地连接在底部支撑部 101a两 端的端部支撑部 101b。 端部支撑部 101b与底部支撑部 101a共同形成等腰三角形。 在两个端部支撑部 101b之间, 可以还设置有连接部 101c, 该连接部 101c用于将两 个端部支撑部 101b的中部连接起来, 以实现更加稳固的结构。 [0033] wherein the bracket 101 can be any suitable shape. In the illustrated embodiment, the bracket 101 includes a bottom support portion 101a having a substantially rectangular frame shape, and an end support portion 101b symmetrically coupled to both ends of the bottom support portion 101a in the east-west direction. The end support portion 101b and the bottom support portion 101a together form an isosceles triangle. Between the two end support portions 101b, there may be further provided a connecting portion 101c for connecting the middle portions of the two end support portions 101b to achieve a more stable structure.
[0034] 外框 102可转动地安装在支架 101的顶部, 可绕着沿东西方向延伸的轴线相对于 支架 101转动。 具体而言, 在支架 101的顶部, 设置有一对第一轴承 105。 该第一 轴承 105可以分别设置在端部支撑部 101b的顶部。 外框 102的两条长边的中部通 过第一轴承 105可转动地连接在支架 101的顶部。 其中该长边沿着南北方向延伸  The outer frame 102 is rotatably mounted on the top of the bracket 101 so as to be rotatable relative to the bracket 101 about an axis extending in the east-west direction. Specifically, on the top of the bracket 101, a pair of first bearings 105 are provided. The first bearing 105 may be disposed at the top of the end support portion 101b, respectively. The middle portions of the two long sides of the outer frame 102 are rotatably coupled to the top of the bracket 101 via the first bearing 105. Where the long side extends along the north-south direction
[0035] 聚光镜 103的的反射面可以是槽式圆弧面或者槽式抛物面, 其在垂直于东西和 南北方向上的投影为矩形。 该矩形包括长边和短边, 长边为槽边, 短边是聚光 镜的弧形端部的投影。 其槽边朝向南北方向延伸。 在聚光镜 103的表面上镀有反 射膜。 [0035] The reflecting surface of the condensing mirror 103 may be a grooved circular surface or a grooved paraboloid whose projection is rectangular in a direction perpendicular to the east and west and the north and south. The rectangle includes a long side and a short side, the long side is the groove side, and the short side is the projection of the curved end of the concentrating mirror. The groove edge extends toward the north-south direction. A reflective film is plated on the surface of the condensing mirror 103.
[0036] 本发明的聚光镜 103的反射面优选槽式圆弧面, 这种形状的聚光镜 103的优点在 于: (1) 制作工艺简单, 成本低; (2) 圆弧形反射面的各点曲率半径相同, 反射面在使用过程中受到温度的影响而热涨冷缩吋, 各点的应力相同而不变形 。 而槽式抛物面则具有以下缺点: (1) 反射面的各点曲率半径不同, 制作工艺 复杂、 成本高; (2) 反射面的各点曲率半径不同, 在使用过程中受到温度的影 响而热涨冷缩吋, 各点的应力不同, 容易变形, 严重影响聚光镜 103的聚光效果  [0036] The reflecting surface of the condensing mirror 103 of the present invention is preferably a grooved arc surface. The concentrating mirror 103 of this shape has the following advantages: (1) a simple manufacturing process and low cost; (2) curvature of each point of the circular arc reflecting surface The radius is the same, the reflective surface is affected by the temperature during use, and the heat is increased and contracted. The stress at each point is the same without deformation. The trough parabola has the following disadvantages: (1) The curvature radius of each point of the reflecting surface is different, the manufacturing process is complicated and the cost is high; (2) The curvature radius of each point of the reflecting surface is different, and the temperature is affected by the heat during use. The temperature rises and contracts, the stress at each point is different, and it is easy to deform, which seriously affects the concentrating effect of the condensing mirror 103.
[0037] 聚光镜 103可转动地安装在外框 102内, 可绕着沿南北方向延伸的轴线相对于外 框 102转动。 具体而言, 在外框 102的顶部, 设置有一对第二轴承 106。 该第二轴 承 106可以分别设置在外框 102的两条短边的顶部。 聚光镜 103的弧形端部通过第 二轴承 103可转动地连接在外框 102内。 其中聚光镜 103的长边、 短边分别比外框 102的长边、 短边短, 且聚光镜 103的长边、 短边分别与相邻的外框 102的长边、 短边之间留有间隙。 这样, 聚光镜 103可以在外框 102内沿着南北方向延伸的轴 线转动而不与外框 102干涉。 由图 3可以明显看出, 聚光镜 103设置在支架 101内 , 其重心降低, 可以节省支架 101的材料、 节省成本。 [0037] The condensing mirror 103 is rotatably mounted within the outer frame 102 and rotatable relative to the outer frame 102 about an axis extending in a north-south direction. Specifically, at the top of the outer frame 102, a pair of second bearings 106 are provided. The second bearings 106 may be disposed on top of the two short sides of the outer frame 102, respectively. The curved end of the condensing mirror 103 is rotatably coupled within the outer frame 102 by a second bearing 103. The long side and the short side of the condensing mirror 103 are shorter than the long side and the short side of the outer frame 102, respectively, and the long side and the short side of the condensing mirror 103 respectively and the long side of the adjacent outer frame 102, There is a gap between the short sides. Thus, the condensing mirror 103 can rotate in the outer frame 102 along an axis extending in the north-south direction without interfering with the outer frame 102. As is apparent from FIG. 3, the concentrating mirror 103 is disposed in the bracket 101, and its center of gravity is lowered, which can save the material of the bracket 101 and save cost.
[0038] 太阳能集热管 104通过高温真空管支架 107固定在聚光镜 103的聚焦位置处, 以 收集能量。 [0038] The solar heat collecting tube 104 is fixed at a focus position of the condensing mirror 103 by a high temperature vacuum tube holder 107 to collect energy.
[0039] 图 4是根据本发明的第一实施例的太阳能集热管 104的剖视图。 如图 4所示, 在 本发明的第一实施例中, 太阳能集热管 104是太阳能真空集热管。 该太阳能真空 集热管 104包括一端幵口、 一端封闭的真空集热管 108、 以及设置在真空集热管 1 08内的金属换热管 109。 真空集热管 108包括罩玻璃管 108a、 以及设置在罩玻璃管 108a内的吸热玻璃管 108b, 罩玻璃管 108a和吸热玻璃管 108b之间抽真空。 在吸热 玻璃管 108b的外层, 镀有吸热膜。 金属换热管 109的两端封闭, 且在靠近真空集 热管 108的幵口端处, 连接导热油进油管 110和导热油出油管 111。 优选地, 导热 油进油管 110插置在金属换热管 109内且延伸至靠近所述金属换热管 109的底部。  4 is a cross-sectional view of a solar heat collecting tube 104 according to a first embodiment of the present invention. As shown in Fig. 4, in the first embodiment of the present invention, the solar heat collecting tube 104 is a solar vacuum heat collecting tube. The solar vacuum heat collecting tube 104 includes a vacuum heat collecting tube 108 closed at one end, closed at one end, and a metal heat exchange tube 109 disposed in the vacuum heat collecting tube 108. The vacuum heat collecting tube 108 includes a cover glass tube 108a, and a heat absorbing glass tube 108b disposed in the cover glass tube 108a, and a vacuum is applied between the cover glass tube 108a and the heat absorbing glass tube 108b. On the outer layer of the endothermic glass tube 108b, a heat absorbing film is plated. Both ends of the metal heat exchange tube 109 are closed, and at a mouth end close to the vacuum heat collecting tube 108, the heat transfer oil inlet pipe 110 and the heat transfer oil outlet pipe 111 are connected. Preferably, the heat transfer oil inlet pipe 110 is inserted in the metal heat exchange tube 109 and extends to the bottom of the metal heat exchange tube 109.
[0040] 二维跟踪太阳能聚光装置 100还包括用于泵送导热油、 使其循环的泵。  [0040] The two-dimensional tracking solar concentrating device 100 further includes a pump for pumping the heat transfer oil to circulate it.
[0041] 太阳能真空集热管 104放置在聚光镜 103的聚焦位置处, 聚光镜 103所收集的能 量被反射到太阳能真空集热管 104, 并被吸热玻璃管 108b吸收。 吸热玻璃管 108b 所吸收的能量传递至金属换热管 109。 导热油经导热油进油管 110进入金属换热 管 109内, 并从金属换热管 109底部流动至金属换热管 109的幵口端处的导热油出 油管 111, 最终从导热油出油管 111流出。 导热油在金属换热管 109内充分吸收了 热量, 温度升高, 流出后可以将热量进一步传递。  [0041] The solar vacuum heat collecting tube 104 is placed at the focus position of the condensing mirror 103, and the energy collected by the condensing mirror 103 is reflected to the solar vacuum heat collecting tube 104 and absorbed by the heat absorbing glass tube 108b. The energy absorbed by the endothermic glass tube 108b is transferred to the metal heat exchange tube 109. The heat transfer oil enters the metal heat exchange tube 109 through the heat transfer oil inlet pipe 110, and flows from the bottom of the metal heat exchange tube 109 to the heat transfer oil outlet pipe 111 at the nip end of the metal heat exchange tube 109, and finally from the heat transfer oil discharge pipe 111. Flow out. The heat transfer oil absorbs heat sufficiently in the metal heat exchange tube 109, and the temperature rises, and the heat can be further transmitted after flowing out.
[0042] 优选地, 太阳能真空集热管 104的幵口端朝南。 这是因为我国的大部分地区处 在北纬 23.5度以北, 即使夏至日太阳也是由南面射向聚光镜 103, 因此南端较低 , 这可以防止雨水进入太阳能真空集热管 104内部。  [0042] Preferably, the mouth end of the solar vacuum heat collecting tube 104 faces south. This is because most of China's area is north of 23.5 degrees north latitude, and even if the sun goes from the south to the concentrating mirror 103, the south end is lower, which prevents rainwater from entering the interior of the solar vacuum heat collecting tube 104.
[0043] 图 6是根据本发明的第二实施例的二维跟踪太阳能聚光装置 100的光路图。 如图 6所示, 在本发明的第二实施例中, 太阳能集热管 104是光热水管, 其横截面呈 倒置的等腰三角形, 且由金属制成。 等腰三角形的底边面对太阳, 而两条对称 边的外管壁朝向聚光镜 103, 且粘贴有单晶硅或者多晶硅 112。 聚光镜 103所收集 的能量被反射到单晶硅或者多晶硅 112上, 一部分用于发电, 另一部分转换为热 能传递到管壁, 并进一步传递到光热水管内的水, 以便对水进行加热, 提供生 活用热水。 6 is a light path diagram of a two-dimensional tracking solar concentrating device 100 according to a second embodiment of the present invention. As shown in Fig. 6, in the second embodiment of the present invention, the solar heat collecting tube 104 is a light hot water tube having an inverted isosceles triangle in cross section and made of metal. The bottom edge of the isosceles triangle faces the sun, and the outer wall of the two symmetrical sides faces the concentrating mirror 103, and single crystal silicon or polysilicon 112 is pasted. The energy collected by the condensing mirror 103 is reflected onto the single crystal silicon or polysilicon 112, one for power generation and the other for heat. It can be transferred to the pipe wall and further transferred to the water in the light hot water pipe to heat the water and provide domestic hot water.
[0044] 在以上的第一和第二实施例中, 太阳能聚光装置 100还包括光感应器、 以及用 于驱动外框 102绕着东西方向的轴线转动并驱动聚光镜 103绕着南北方向的轴线 转动的驱动装置。 光感应器与驱动装置电连接, 使得驱动装置可根据光感应器 感应到的光线来工作。 这使得太阳能聚光装置 100能在一天之中在东西方向上跟 踪太阳光, 且同吋在南北方向上跟踪太阳光, 使得太阳光始终能垂直照射在聚 光镜 103的两条槽边共同形成的平面上。 这种太阳能聚光装置在一天的各个吋段 接受的太阳光的辐照强度趋于平稳。 经实际测试, 采用同样面积的聚光镜 103, 本发明的二维跟踪太阳能聚光装置 100—天所接受的太阳辐照量是一维跟踪的太 阳能聚光装置的 1.6倍, 因此降低了太阳能利用的投资成本。  [0044] In the above first and second embodiments, the solar concentrating device 100 further includes a light sensor, and an axis for driving the outer frame 102 to rotate about the east-west axis and driving the condensing mirror 103 around the north-south direction. Rotating drive. The light sensor is electrically connected to the driving device so that the driving device can work according to the light sensed by the light sensor. This enables the solar concentrating device 100 to track the sunlight in the east-west direction during the day, and to track the sunlight in the north-south direction, so that the sunlight can always vertically illuminate the plane formed by the two groove sides of the condensing mirror 103. on. This solar concentrating device tends to stabilize the irradiance of sunlight received at various stages of the day. After actual testing, using the same area of the concentrating mirror 103, the two-dimensional tracking solar concentrating device 100 of the present invention receives 1.6 times the amount of solar radiation of the one-dimensional tracking solar concentrating device, thereby reducing the utilization of solar energy. cost of investment.
[0045] 在此基础上, 为了收集相同的能量, 可以采用较小面积的聚光镜 103。 通常采 用 Im2-15m2的聚光镜面, 且 10-20个聚光装置组成一排, 由驱动装置驱动。 由于 聚光镜 103的面积较小, 其镜面长度 (也就是两个槽边的长度) 较短, 通常在 1-5 米长, 两个槽边之间的宽度也较窄, 一般在 0.5-3米宽。 这样就可以采用一端幵 口的太阳能真空集热管, 而不必采用价格昂贵的两端幵口的玻璃金属太阳能集 热管进行对接使用。 一端幵口的全玻璃太阳能真空集热管在二十年前就已经在 我国规模化生产用于太阳能热水器, 这大幅降低了生产成本。  [0045] On this basis, in order to collect the same energy, a smaller area of the concentrating mirror 103 can be employed. Usually, an illuminating mirror of Im2-15m2 is used, and 10-20 concentrating devices are arranged in a row, driven by a driving device. Since the area of the condensing mirror 103 is small, the mirror length (that is, the length of the two groove sides) is short, usually 1-5 meters long, and the width between the two groove sides is also narrow, generally 0.5-3 meters. width. In this way, a solar vacuum heat collecting tube with one end opening can be used, and it is not necessary to use a glass frit solar collector tube with an expensive two-end opening for docking. The all-glass solar vacuum collector tube with one end of the mouth has been used in solar water heaters in China for 20 years, which greatly reduced the production cost.
[0046] 图 5是根据本发明的第一实施例的二维跟踪太阳能聚光装置 100的光路图。 如图 5所示, 在该实施例中, 聚光镜 103的反射面位于圆弧线段  5 is a light path diagram of a two-dimensional tracking solar concentrating device 100 according to a first embodiment of the present invention. As shown in FIG. 5, in this embodiment, the reflecting surface of the condensing mirror 103 is located on a circular arc segment.
[数]  [number]
AB 上, 太阳能集热管 104设置在反射面的对称中心轴线 OC上。 圆弧线段 [数] On the AB, the solar collector tube 104 is disposed on the symmetrical central axis OC of the reflecting surface. Arc segment [number]
的圆心为 0, 半径为 R。 以点 0为原点建立 XOY平面直角坐标系。 太阳能集热 管 104的截面形状为圆形, 在该圆形内作内接等腰直角三角形 DEF, 该等腰直角 三角形 DEF的顶点 D位于聚光镜 103的对称中心轴线 OC上, 且朝向聚光镜 103。 D 点的坐标为 (0, b) 。 D点是太阳能集热管 104的截面与 Y轴的交点。 优选地, D 点是吸热玻璃管 108b的截面与 Y轴的交点。 的直线方程为: The center of the circle is 0 and the radius is R. The XOY plane rectangular coordinate system is established with the point 0 as the origin. Solar collector The cross-sectional shape of the tube 104 is a circle in which an isosceles right triangle DEF is formed, and the vertex D of the isosceles right triangle DEF is located on the symmetry center axis OC of the condensing mirror 103 and faces the condensing mirror 103. The coordinates of point D are (0, b). Point D is the intersection of the cross section of the solar heat collecting tube 104 and the Y axis. Preferably, point D is the intersection of the cross section of the heat absorbing glass tube 108b and the Y axis. The straight line equation is:
[0047] Y=-X+b其中 (0<b<R) ; (1)  Y=-X+b where (0<b<R); (1)
[0048] 由 (1) 式可知 0<X<R, 0<Y<R。  [0048] From the formula (1), 0<X<R, 0<Y<R.
[0049] 入射光线垂直于弦 GH入射到圆弧线段  [0049] The incident ray is incident on the circular arc segment perpendicular to the chord GH
[数] 、 上。 其中, 弦 GH的两端点坐标为 G (Xg, Yg) 、 H (- Xg, Yg) , 反射点为 I , 其坐标为 I (Xi, Yi) , 法线为 01, 反射圆弧线段  [Number], on. Wherein, the coordinates of the two ends of the string GH are G (Xg, Yg), H (- Xg, Yg), the reflection point is I, the coordinate is I (Xi, Yi), the normal is 01, and the reflection arc segment
[数]  [number]
在反射点 I处的切线为直线 J; 入射光线 K平行 Y轴入射, 其直线方程为 Xk=¾, 就是通过反射点 I处平行于 Y轴的直线。 要求当入射光线 -Xg<Xk< Xg吋, 照射在 圆弧上的反射光线均能聚焦在 DE、 DF线段上, 也就能证明反射光线能聚集在吸 热管 2的表面上, 且满足聚光比的要求。 The tangent at the reflection point I is a straight line J; the incident ray K is incident on the parallel Y-axis, and its linear equation is Xk=3⁄4, which is a straight line passing through the reflection point I parallel to the Y-axis. It is required that when the incident light-Xg<Xk< Xg吋, the reflected light irradiated on the circular arc can be focused on the DE and DF line segments, it can also be proved that the reflected light can be concentrated on the surface of the heat absorbing tube 2, and the convergence is satisfied. Light ratio requirements.
[0050] 为了实现理想的聚光比, 须满足以下条件: 0.47R≤b≤0.98R。 [0050] In order to achieve an ideal concentration ratio, the following conditions must be met: 0.47R≤b≤0.98R.
[0051] 经实验证明, 当 b=0.47R吋, 在太阳能集热管 104处仍能实现 10倍左右的聚光比 。 随着 b的增加, 聚光比也增加。 当 b=0.5吋, 聚光比达到最大值 150。 当 b=0.51 吋, 可以实现 100倍左右的聚光比。 当 b进一步增加, 聚光比迅速下降。 当 b=0.98 吋, 聚光比为 3。 [0051] It has been experimentally proved that when b=0.47R吋, a concentrating ratio of about 10 times can still be achieved at the solar heat collecting tube 104. As b increases, the concentration ratio also increases. When b = 0.5 吋, the concentration ratio reaches a maximum of 150. When b = 0.51 吋, a concentrating ratio of about 100 times can be achieved. When b is further increased, the concentration ratio decreases rapidly. When b = 0.98 吋, the concentration ratio is 3.
[0052] 当 b大于 0.98R吋, 太阳能集热管 104处的聚光比显著下降。 当 b小于 0.47R吋, 太阳能集热管 104离聚光镜 103的距离过远, 为了保持整体的平衡, 需要将支架 1 01做得很大。 在图中示出了 b等于 0.47、 0.5R、 0.8R、 0.9R吋的几个点。 由图中 可以看出, 在靠近 0.5R的 0.47R处, 光线仍能聚集到 DE、 DF线段上, 也就能证明 反射光线均能聚集在吸热管 2的表面上。 When b is greater than 0.98 R 吋, the condensing ratio at the solar heat collecting tube 104 is significantly lowered. When b is less than 0.47 R 吋, the distance between the solar heat collecting tube 104 and the condensing mirror 103 is too long, and in order to maintain the overall balance, the bracket 101 needs to be made large. Several points where b is equal to 0.47, 0.5R, 0.8R, 0.9R吋 are shown in the figure. As can be seen from the figure, at 0.47R near 0.5R, the light can still be concentrated on the DE and DF segments, which can also be proved. The reflected light can be collected on the surface of the heat absorbing tube 2.
[0053] 图 5所示的光路图同样适用于图 6所示的第二实施例。 [0053] The optical path diagram shown in FIG. 5 is also applicable to the second embodiment shown in FIG. 6.
[0054] 图 7是根据本发明的第三实施例的二维跟踪太阳能聚光装置的光路图。 该第三 实施例是在第二实施例的基础上所做的改进, 与第二实施例相同之处不再赘述 。 如图 7所示, 在第三实施例中, 太阳能集热管 104是光热水管, 其横截面呈矩 形, 且由金属制成。 矩形的底边的外管壁朝向聚光镜 103, 且粘贴有单晶硅或者 多晶硅 112。 聚光镜 103所收集的能量被反射到单晶硅或者多晶硅 112上, 一部分 用于发电, 另一部分转换为热能传递到管壁, 并进一步传递到光热水管内的水 , 以便对水进行加热, 提供生活用热水。 经实验证明, 这种形状的太阳能集热 管 104也能高效地收集能量。  7 is a light path diagram of a two-dimensional tracking solar concentrating device according to a third embodiment of the present invention. This third embodiment is an improvement on the basis of the second embodiment, and the same points as those of the second embodiment will not be described again. As shown in Fig. 7, in the third embodiment, the solar heat collecting tube 104 is a light hot water pipe having a rectangular cross section and made of metal. The outer tube wall of the bottom side of the rectangle faces the condensing mirror 103, and single crystal silicon or polysilicon 112 is pasted. The energy collected by the condensing mirror 103 is reflected onto the single crystal silicon or polysilicon 112, one part is used for power generation, and the other part is converted into heat energy to the tube wall, and further transferred to the water in the light hot water tube to heat the water, providing Hot water for living. It has been experimentally proven that solar collector tubes 104 of this shape can also efficiently collect energy.
[0055] 本发明的二维跟踪太阳能聚光装置 100可以对太阳光进行全方位跟踪, 且能够 采用一端幵口的太阳能真空集热管 104, 降低了生产成本。  [0055] The two-dimensional tracking solar concentrating device 100 of the present invention can perform omnidirectional tracking of sunlight, and can adopt a solar vacuum heat collecting tube 104 with one end opening, thereby reducing the production cost.
[0056] 以上所述仅为本发明的较佳实施例而已, 并不用以限制本发明, 凡在本发明的 精神和原则之内所作的任何修改、 等同替换和改进等, 均应包含在本发明的保 护范围之内。  The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalents, and improvements made within the spirit and scope of the present invention should be included in the present invention. Within the scope of protection of the invention.

Claims

权利要求书 Claim
[权利要求 1] 一种二维跟踪太阳能聚光装置, 其特征在于, 包括: 支架; 外框, 通 过第一轴承安装在所述支架的顶部且可绕着东西方向延伸的轴线相对 于所述支架转动; 具有圆弧形反射面的聚光镜, 通过第二轴承安装在 所述外框内, 且可绕着南北方向延伸的轴线相对于所述外框转动; 以 及太阳能集热管, 固定在所述聚光镜的聚焦位置处。  [Claim 1] A two-dimensional tracking solar concentrating device, comprising: a bracket; an outer frame mounted on a top of the bracket by a first bearing and having an axis extending in an east-west direction relative to the a bracket rotating; a condensing mirror having a circular arc-shaped reflecting surface, mounted in the outer frame by a second bearing, and rotatable relative to the outer frame about an axis extending in a north-south direction; and a solar heat collecting tube fixed in the The focus position of the condenser.
[权利要求 2] 根据权利要求 1所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 太阳能集热管包括一端幵口、 一端封闭的真空集热管、 以及设置在所 述真空集热管内的金属换热管; 所述金属换热管的两端封闭, 且在靠 近所述真空集热管的幵口端处连接导热油进油管和导热油出油管。  [Claim 2] The two-dimensional tracking solar concentrating device according to claim 1, wherein the solar heat collecting tube comprises a vacuum collecting tube with one end opening, one end closed, and a vacuum collecting tube disposed in the vacuum collecting tube The metal heat exchange tube is closed at both ends of the metal heat exchange tube, and the heat transfer oil inlet pipe and the heat transfer oil outlet pipe are connected near the mouth end of the vacuum heat collecting tube.
[权利要求 3] 根据权利要求 2所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 真空集热管包括罩玻璃管、 以及设置在罩玻璃管内的吸热玻璃管, 所 述罩玻璃管和所述吸热玻璃管之间抽真空; 在所述吸热玻璃管的外层 [Claim 3] The two-dimensional tracking solar concentrating device according to claim 2, wherein the vacuum heat collecting tube comprises a cover glass tube, and a heat absorbing glass tube disposed in the cover glass tube, the cover glass Vacuuming between the tube and the endothermic glass tube; in the outer layer of the endothermic glass tube
, 镀有吸热膜。 , coated with a heat absorbing film.
[权利要求 4] 根据权利要求 2所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 进油管插置在所述金属换热管内且延伸至靠近所述金属换热管的底部  [Claim 4] The two-dimensional tracking solar concentrating device according to claim 2, wherein the oil inlet pipe is inserted in the metal heat exchange tube and extends to a bottom of the metal heat exchange tube
[权利要求 5] 根据权利要求 1所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 反射面位于圆弧线段 [Claim 5] The two-dimensional tracking solar concentrating device according to claim 1, wherein the reflecting surface is located in a circular arc segment
AB 上, 所述太阳能集热管设置在所述反射面的对称中心轴线 OC上; 所 述圆弧线段 AB, the solar heat collecting tube is disposed on a symmetrical central axis OC of the reflecting surface; the circular arc segment
的圆心为 0, 半径为 R, 以点 0为原点建立 XOY平面直角坐标系, 所 述太阳能集热管的截面形状为圆 0', 在所述圆 0 '内作内接等腰直角 三角形 DEF, 所述等腰直角三角形 DEF的顶点 D位于聚光镜 103的对称 中心轴线 OC和 Y轴上、 且朝向所述聚光镜, D点的坐标为 (0, b) , 0.47R≤b≤0.98R。 The center of the circle is 0, the radius is R, and the XOY plane rectangular coordinate system is established with the point 0 as the origin. The cross-sectional shape of the solar heat collecting tube is a circle 0', and an isoscelial right angle is made in the circle 0'. a triangle DEF, the apex D of the isosceles right triangle DEF is located on the symmetry center axis OC and the Y axis of the condensing mirror 103, and faces the condensing mirror, the coordinates of the point D are (0, b), 0.47R ≤ b ≤ 0.98R .
[权利要求 6] 根据权利要求 1所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 太阳能集热管的横截面呈倒置的等腰三角形, 且所述太阳能集热管由 金属制成; 所述等腰三角形的两条对称边的外管壁朝向所述聚光镜, 且粘贴有单晶硅或者多晶硅。  [Claim 6] The two-dimensional tracking solar concentrating device according to claim 1, wherein the solar heat collecting tube has an inverted isosceles triangle in cross section, and the solar heat collecting tube is made of metal; The outer tube wall of the two symmetrical sides of the isosceles triangle faces the concentrating mirror, and is affixed with single crystal silicon or polycrystalline silicon.
[权利要求 7] 根据权利要求 1所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 支架包括呈矩形框状的底部支撑部、 以及沿东西方向对称地连接在所 述底部支撑部两端的端部支撑部, 所述端部支撑部与所述底部支撑部 共同形成等腰三角形。  [Claim 7] The two-dimensional tracking solar concentrating device according to claim 1, wherein the bracket includes a bottom support portion having a rectangular frame shape, and is symmetrically coupled to the bottom support portion in an east-west direction An end support portion at both ends, the end support portion and the bottom support portion together forming an isosceles triangle.
[权利要求 8] 根据权利要求 1所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 聚光镜的曲面是槽式圆弧面或者槽式抛物面, 且包括槽边, 所述槽边 沿着南北方向延伸。  [Claim 8] The two-dimensional tracking solar concentrating device according to claim 1, wherein the curved surface of the condensing mirror is a grooved arc surface or a grooved paraboloid, and includes a groove edge, and the groove edge is along Extending from north to south.
[权利要求 9] 根据权利要求 8所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 聚光镜与所述外框之间留有间隙。  [Claim 9] The two-dimensional tracking solar concentrating device according to claim 8, wherein a gap is left between the condensing mirror and the outer frame.
[权利要求 10] 根据权利要求 1所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 太阳能聚光装置还包括光感应器、 以及用于驱动所述外框绕着东西方 向的轴线转动并驱动所述聚光镜绕着南北方向的轴线转动的驱动装置  [Claim 10] The two-dimensional tracking solar concentrating device according to claim 1, wherein the solar concentrating device further comprises a light sensor, and an axis for driving the outer frame around the east-west direction a driving device that rotates and drives the condensing mirror to rotate about an axis in the north-south direction
[权利要求 11] 根据权利要求 1所述的二维跟踪太阳能聚光装置, 其特征在于, 所述 太阳能集热管的横截面呈矩形, 且所述太阳能集热管由金属制成; 所 述矩形的底边的外管壁朝向所述聚光镜, 且粘贴有单晶硅或者多晶硅 [Claim 11] The two-dimensional tracking solar concentrating device according to claim 1, wherein the solar heat collecting tube has a rectangular cross section, and the solar heat collecting tube is made of metal; The outer tube wall of the bottom side faces the concentrating mirror, and is pasted with single crystal silicon or polycrystalline silicon
PCT/CN2016/104680 2016-01-15 2016-11-04 2d-tracking solar concentrator WO2017121178A1 (en)

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