JP2010151346A - Sunlight collecting system - Google Patents

Sunlight collecting system Download PDF

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JP2010151346A
JP2010151346A JP2008328309A JP2008328309A JP2010151346A JP 2010151346 A JP2010151346 A JP 2010151346A JP 2008328309 A JP2008328309 A JP 2008328309A JP 2008328309 A JP2008328309 A JP 2008328309A JP 2010151346 A JP2010151346 A JP 2010151346A
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center mirror
mirror
center
thermal energy
collecting system
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JP5247416B2 (en
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Katsushige Nakamura
勝重 中村
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Mitaka Kohki Co Ltd
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Mitaka Kohki Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/79—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with spaced and opposed interacting reflective surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
    • 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
    • F24S30/20—Arrangements for moving or orienting solar heat collector modules for linear movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/50—Preventing overheating or overpressure
    • F24S40/52—Preventing overheating or overpressure by modifying the heat collection, e.g. by defocusing or by changing the position of heat-receiving elements
    • 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
    • F24S2030/10—Special components
    • F24S2030/11—Driving means
    • 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

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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)
  • Mounting And Adjusting Of Optical Elements (AREA)
  • Microscoopes, Condenser (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sunlight collecting system for adjusting thermal energy obtained without changing the state of heliostats. <P>SOLUTION: A center mirror 1 is moved parallel in the vertical direction. When the center mirror 1 is moved vertically parallel from a state of reflected light from the center mirror 1, being condensed onto one point, a reflected light condensing range is widened to decrease thermal energy obtained per unit area. When the thermal energy of a condensing section becomes too large, the center mirror 1 is only moved vertically parallel without changing the direction of the partial heliostats 7. Since the thermal energy is decreased according to the amount of movement, thermal energy is easily adjusted. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、太陽光集光システムに関するものである。   The present invention relates to a solar light collecting system.

太陽光を効率良く一点に集めて熱エネルギーに変え、その熱エネルギーにより、発電や、海水淡水化を行う技術が知られている。この種の太陽光集光装置は、所定の高さに設置された下向きのセンタミラーへ向けて、複数のヘリオスタットにより太陽光を反射し、センタミラーにて反射された太陽光をセンタミラーの下方の一点に集光させる構造になっている。複数のヘリオスタットからの反射光を一点に集中するため高い熱エネルギーが得られるようになっている。   A technology is known in which sunlight is efficiently collected into one point and converted into thermal energy, and power generation and seawater desalination are performed using the thermal energy. This type of solar concentrator reflects sunlight by a plurality of heliostats toward a downward center mirror installed at a predetermined height, and reflects the sunlight reflected by the center mirror to the center mirror. It is structured to collect light at one point below. Since the reflected light from a plurality of heliostats is concentrated at one point, high thermal energy can be obtained.

この種の太陽光集光システムの場合、太陽光の弱い冬期などでも必要な熱エネルギーが得られるように、数多くのヘリオスタットをセンタミラーの周囲に配置している。従って、太陽光の強い夏期の日中などは全てのヘリオスタットを利用すると、一点に集中する熱エネルギーが大きくなり過ぎるため、一部のヘリオスタットの向きを変えてセンタミラーから外し、センタミラーに入光しないようにして、一点に集光される熱エネルギーの調整を図っている。曇りの状態から晴天に変化したような場合も同様の調整を図っている（例えば、特許文献１参照）。
特開平１１−１１９１０５号公報 In the case of this type of solar condensing system, a large number of heliostats are arranged around the center mirror so that necessary heat energy can be obtained even in winter when sunlight is weak. Therefore, if all heliostats are used during the daytime, such as in the summer, when sunlight is strong, the thermal energy concentrated on one point becomes too large. The adjustment of the thermal energy collected at one point is made so as not to enter the light. The same adjustment is made even when the cloudy state changes to a clear sky (see, for example, Patent Document 1).
JP 11-119105 A

しかしながら、このような従来の技術にあっては、一部のヘリオスタットの向きを変えることにより、得られる熱エネルギーの調整を行っているため、ヘリオスタットの制御が大変に面倒である。特に、各ヘリオスタットをセンサー方式により自律制御している場合は、いったん向きを変えたヘリオスタットを元の状態の戻すために別のセンサーが必要となり、センサーの構造が大変に複雑になる。   However, in such a conventional technique, the heat energy obtained is adjusted by changing the direction of some heliostats, so that the control of the heliostat is very troublesome. In particular, when each heliostat is autonomously controlled by a sensor system, another sensor is required to return the heliostat whose direction has been changed once to its original state, and the structure of the sensor becomes very complicated.

本発明は、このような従来の技術に着目してなされたものであり、ヘリオスタットの状態は変化させずに得られる熱エネルギーの調整を図ることができる太陽光集光システムを提供するものである。   The present invention has been made by paying attention to such a conventional technique, and provides a solar condensing system capable of adjusting the thermal energy obtained without changing the state of the heliostat. is there.

請求項１記載の発明は、所定の高さに設置されるセンタミラーと、センタミラーを所定の高さ位置に支持するタワーと、センタミラーの周囲の地上に設置されて太陽光をセンタミラーへ向けて反射させるヘリオスタットとから成り、センタミラーにて反射された太陽光がセンタミラーの下方の一点に集光する太陽光集光システムであって、前記センタミラーがタワーに対して上下方向に平行移動自在であることを特徴とする。   According to the first aspect of the present invention, a center mirror installed at a predetermined height, a tower that supports the center mirror at a predetermined height position, and a solar that is installed on the ground around the center mirror to the center mirror A solar condensing system that condenses sunlight reflected by the center mirror at a point below the center mirror, the center mirror being vertically oriented with respect to the tower It is characterized by being freely movable.

請求項２記載の発明は、センタミラーがタワーの上部に伸縮機構を介して吊り下げ支持され、伸縮機構を伸縮させることにより、センタミラーが上下方向に平行移動することを特徴とする。   The invention according to claim 2 is characterized in that the center mirror is suspended and supported on the upper portion of the tower via an expansion / contraction mechanism, and the expansion / contraction of the expansion / contraction mechanism moves the center mirror in the vertical direction.

請求項３記載の発明は、センタミラーが楕円鏡で、ヘリオスタットからの反射光がセンタミラーの第１焦点に向けて反射され、第１焦点を通過した反射光がセンタミラーで反射されて第２焦点に集光することを特徴とする。   In the invention according to claim 3, the center mirror is an elliptical mirror, the reflected light from the heliostat is reflected toward the first focus of the center mirror, and the reflected light that has passed through the first focus is reflected by the center mirror. It is characterized by focusing on two focal points.

請求項１記載の発明によれば、センタミラーが上下方向に平行移動するため、センタミラーからの反射光が一点に集光した状態から、センタミラーを上下に平行移動させると、反射光の集光範囲が広がり、単位面積当たりで得られる熱エネルギーが低下する。従って、集光部の熱エネルギーが大きくなり過ぎる場合は、一部のヘリオスタットの向きを変えるのではなく、センタミラーを上下に平行移動させるだけで、その移動量に応じて、熱エネルギーが低下するため、熱エネルギーの調整が容易である。   According to the first aspect of the present invention, since the center mirror is translated in the vertical direction, if the center mirror is translated up and down from the state in which the reflected light from the center mirror is focused on one point, the reflected light is collected. The light range is expanded and the thermal energy obtained per unit area is reduced. Therefore, if the heat energy of the condensing part becomes too large, instead of changing the direction of some heliostats, the center mirror is simply moved in parallel up and down, and the heat energy decreases according to the amount of movement. Therefore, adjustment of thermal energy is easy.

請求項２記載の発明によれば、センタミラーをタワーに対して吊り下げ支持している構造が伸縮機構のため、伸縮機構を伸縮させるだけで、センタミラーを上下方向で平行移動させることができる。   According to the second aspect of the present invention, since the structure in which the center mirror is suspended and supported from the tower is an expansion / contraction mechanism, the center mirror can be translated in the vertical direction only by expanding / contracting the expansion / contraction mechanism. .

請求項３記載の発明によれば、センタミラーが楕円鏡のため、ヘリオスタットはセンタミラーの第１焦点へ向けて太陽光を反射するように制御すれば良い。そうすれば、第１焦点を通過した反射光は必ずセンタミラーで反射されて第２焦点に集光する。全てのヘリオスタットの反射ターゲットが一点（第１焦点）のため、ヘリオスタットの制御が行い易い。   According to the invention described in claim 3, since the center mirror is an elliptical mirror, the heliostat may be controlled to reflect sunlight toward the first focal point of the center mirror. If it does so, the reflected light which passed the 1st focus will certainly be reflected by a center mirror, and will be condensed on the 2nd focus. Since the reflection target of all the heliostats is one point (first focus), the heliostat can be easily controlled.

本発明の好適な実施形態を図１〜図６に基づいて説明する。図１は太陽集光装置を示している。中心にはセンタミラー１が４本のタワー２により地面に対して所定高さ（約１０ｍ）に支持されている。センタミラー１は楕円鏡で、中央には円形の開口３が形成されている。この開口３は下方の熱気を上方へ逃がすためのものである。   A preferred embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a solar concentrator. At the center, a center mirror 1 is supported at a predetermined height (about 10 m) with respect to the ground by four towers 2. The center mirror 1 is an elliptical mirror, and a circular opening 3 is formed at the center. This opening 3 is for letting downward hot air escape upward.

タワー２の頂部４は内側に曲折している。センタミラー１の四方にはタワー２の頂部４の下方に位置する突片５が形成されている。そして、この突片５と頂部４とが、伸縮機構としてのリニアアクチュエータ６により上下方向で連結されている。従って、センタミラー１はこのアクチュエータ６を介してタワー２の頂部４に吊り下げ支持された状態になっている。４本のアクチュエータ６は油圧で作動し、全てが同じ長さだけ精密に同期して伸縮することができる。   The top 4 of the tower 2 is bent inward. Projecting pieces 5 positioned below the top 4 of the tower 2 are formed on the four sides of the center mirror 1. And this protrusion 5 and the top part 4 are connected with the up-down direction by the linear actuator 6 as an expansion-contraction mechanism. Therefore, the center mirror 1 is suspended and supported by the top 4 of the tower 2 via the actuator 6. The four actuators 6 are hydraulically operated, and all of them can be expanded and contracted in synchronism precisely with the same length.

センタミラー１は下面が反射面で、その反射面の鏡面形状が回転楕円面の一部（オフセット楕円鏡）を構成している。従って、このセンタミラー１の下方には楕円面の長軸上に第１焦点Ａ（高位置）と第２焦点Ｂ（低位置）が存在する。   The center mirror 1 has a reflecting surface on the lower surface, and the mirror surface shape of the reflecting surface constitutes a part of an ellipsoidal surface (offset elliptical mirror). Therefore, below the center mirror 1, there are a first focal point A (high position) and a second focal point B (low position) on the major axis of the ellipsoid.

センタミラー１の周囲には、多数のヘリオスタット７がセンタミラー１を取り囲むように放射状に設置されている。ヘリオスタット７は図示せぬセンサーにより太陽の動きに連動して向きを変化させる構造となっており、センターミラー１の高さとは独立に地面に対して位置固定された仮想点に向けて反射するように制御される。そしてセンターミラー１が地面に対して所定の高さに位置づけられて第１焦点Ａが仮想点に一致したときに、ヘリオスタット７は常に太陽光Ｌを第１焦点Ａへ向けて反射するように制御される。第１焦点Ａを通過した太陽光Ｌはセンタミラー１にて反射され、そして第２焦点Ｂに集光する。第２焦点Ｂに集光した太陽光Ｌは熱変換装置８導入されて熱エネルギーに変換される。得られた熱エネルギーは蒸気タービンを回転させる蒸気発生等に利用される。   A large number of heliostats 7 are radially disposed around the center mirror 1 so as to surround the center mirror 1. The heliostat 7 has a structure in which the direction is changed by a sensor (not shown) in conjunction with the movement of the sun, and reflects toward a virtual point whose position is fixed with respect to the ground independently of the height of the center mirror 1. To be controlled. When the center mirror 1 is positioned at a predetermined height with respect to the ground and the first focus A coincides with the virtual point, the heliostat 7 always reflects the sunlight L toward the first focus A. Be controlled. The sunlight L that has passed through the first focal point A is reflected by the center mirror 1 and then condensed at the second focal point B. The sunlight L collected at the second focal point B is introduced into the heat conversion device 8 and converted into heat energy. The obtained thermal energy is used for generating steam for rotating the steam turbine.

太陽光Ｌは第２焦点Ｂに集光するが、完全な点ではなく、第２焦点Ｂにおいて一定の大きさの太陽の像ｄを結ぶ。第１焦点Ａを通過して第２焦点Ｂに集光する像ｄが一番小さいサイズとなる。この状態では高温が得られ、熱変換装置８において大きな熱エネルギーが得られる。   Sunlight L is condensed at the second focal point B, but is not a perfect point, and forms a sun image d of a certain size at the second focal point B. The image d passing through the first focal point A and condensing on the second focal point B has the smallest size. In this state, a high temperature is obtained, and large heat energy is obtained in the heat conversion device 8.

そして、熱変換装置８で発生する熱エネルギーをモニターした結果、必要量よりも熱エネルギーが大きくなり過ぎた場合には、これを検出し、その検出信号を図示せぬ制御部へ出力する。検出信号を入力した制御部はアクチュエータ６を制御して、全てのアクチュエータ６を所定の同じ長さだけ長くする。全てのアクチュエータ６が同じだけ長くなるため、センタミラー１は下方へ平行移動する。   When the thermal energy generated by the heat conversion device 8 is monitored, if the thermal energy becomes excessively larger than the required amount, this is detected and a detection signal is output to a control unit (not shown). The control unit that has input the detection signal controls the actuators 6 to lengthen all the actuators 6 by the same predetermined length. Since all the actuators 6 become the same length, the center mirror 1 translates downward.

センタミラー１が下方へ平行移動すると、第１焦点Ａ及び第２焦点Ｂも地面に対して平行移動し地面に対して固定された仮想点から第１焦点Ａがずれるため、太陽光Ｌが第１焦点Ａ及び第２焦点Ｂに集まらなくなって、第２焦点Ｂにおける集光面積Ｄが大きくなる。従って、単位面積当たりの熱エネルギー量が低下し、熱変換装置８で発生する熱量も低下する。   When the center mirror 1 is translated downward, the first focal point A and the second focal point B are also translated relative to the ground, and the first focal point A deviates from the virtual point fixed with respect to the ground. The light is not collected at the first focus A and the second focus B, and the light collection area D at the second focus B is increased. Therefore, the amount of heat energy per unit area is reduced, and the amount of heat generated in the heat conversion device 8 is also reduced.

熱変換装置８で発生する熱エネルギーが下がり過ぎると、その信号が制御部へ出力され、制御部がアクチュエータ６を元の長さに戻す。アクチュエータ６が元の長さに戻ると、センタミラー１が上昇し、第１焦点Ａ及び第２焦点Ｂの幾何学的関係が成立し、第２焦点Ｂに小さな太陽の像ｄを結ぶ。   If the heat energy generated in the heat conversion device 8 is too low, the signal is output to the control unit, and the control unit returns the actuator 6 to its original length. When the actuator 6 returns to its original length, the center mirror 1 is raised, the geometric relationship between the first focus A and the second focus B is established, and a small sun image d is formed at the second focus B.

以上の制御を繰り返すことにより、熱変換装置８で得られる熱エネルギーが大きくなりすぎるのを防止することができる。ヘリオスタット７の向きはそのままで、センタミラー１を上下方向で平行移動させるだけで熱エネルギーの制御を行うことができるため、熱エネルギーの調整が容易である。   By repeating the above control, it is possible to prevent the thermal energy obtained by the heat conversion device 8 from becoming too large. Since the heat energy can be controlled by simply moving the center mirror 1 in the vertical direction while maintaining the orientation of the heliostat 7, the adjustment of the heat energy is easy.

以上に実施形態では、集光面積Ｄを広げるために、センタミラー１は下降させる例を示したが、正規位置から上昇させても良い。   As described above, in the embodiment, the example in which the center mirror 1 is lowered in order to widen the light collection area D is shown, but it may be raised from the normal position.

センタミラー１を楕円鏡例にしたが球面鏡でも良い。下側に凸の鏡面でも良い。複数のリング状のミラーをフレネル状に中心から隙間を設けて状態で組み合わせた構造でも良い。要は、高い位置に設置したセンタミラーにミラーに向けてヘリオスタット７から太陽光Ｌを反射し、センタミラーで反射された太陽光Ｌがセンタミラー１の下方である程度の範囲に集光する太陽光集光システムであれば、本発明を適用することができる。   Although the center mirror 1 is an example of an elliptical mirror, a spherical mirror may be used. The mirror surface may be convex downward. A structure in which a plurality of ring-shaped mirrors are combined in a state of providing a gap from the center in a Fresnel shape. The point is that the sunlight L is reflected from the heliostat 7 toward the center mirror installed at a high position, and the sunlight L reflected by the center mirror is condensed to a certain extent below the center mirror 1. The present invention can be applied to any light condensing system.

伸縮機構として油圧式のアクチュエータ６を例にしたが、その他のスクリュー構造等を採用することもできる。   Although the hydraulic actuator 6 is taken as an example of the expansion / contraction mechanism, other screw structures or the like can be employed.

本発明の実施形態に係る太陽集光装置を示す一部断面の全体図。1 is an overall view of a partial cross section showing a solar concentrator according to an embodiment of the present invention. センタミラーを示す拡大断面図。The expanded sectional view which shows a center mirror. センタミラーを示す斜視図。The perspective view which shows a center mirror. センタミラーを示す平面図。The top view which shows a center mirror. 正規位置にあるセンタミラーの光路を示す図。The figure which shows the optical path of the center mirror in a regular position. 下方へ平行移動させたセンタミラーの光路を示す図。The figure which shows the optical path of the center mirror translated in the downward direction.

符号の説明Explanation of symbols

１ センタミラー
２ タワー
６ アクチュエータ（伸縮機構）
７ ヘリオスタット
８ 熱変換装置
Ａ 第１焦点
Ｂ 第２焦点
Ｌ 太陽光 1 Center mirror 2 Tower 6 Actuator (extension mechanism)
7 Heliostat 8 Heat conversion device A 1st focus B 2nd focus L Sunlight

Claims (3)

所定の高さに設置されるセンタミラーと、センタミラーを所定の高さ位置に支持するタワーと、センタミラーの周囲の地上に設置されて太陽光をセンタミラーへ向けて反射させるヘリオスタットとから成り、センタミラーにて反射された太陽光がセンタミラーの下方の所定の一点に集光する太陽光集光システムであって、
前記センタミラーがタワーに対して上下方向に平行移動自在であることを特徴とする太陽光集光システム。 A center mirror installed at a predetermined height, a tower that supports the center mirror at a predetermined height, and a heliostat installed on the ground around the center mirror to reflect sunlight toward the center mirror A solar light collecting system in which sunlight reflected by the center mirror is collected at a predetermined point below the center mirror,
The solar light collecting system, wherein the center mirror is movable in parallel in the vertical direction with respect to the tower. センタミラーがタワーの上部に伸縮機構を介して吊り下げ支持され、伸縮機構を伸縮させることにより、センタミラーが上下方向に平行移動することを特徴とする請求項１記載の太陽光集光システム。   2. The solar light collecting system according to claim 1, wherein the center mirror is suspended and supported on an upper portion of the tower via an expansion / contraction mechanism, and the center mirror translates in the vertical direction by extending / contracting the expansion / contraction mechanism. センタミラーが楕円鏡で、ヘリオスタットからの反射光がセンタミラーの第１焦点に向けて反射され、第１焦点を通過した反射光がセンタミラーで反射されて第２焦点に集光することを特徴とする請求項１又は請求項２記載の太陽光集光システム。   The center mirror is an elliptical mirror, and the reflected light from the heliostat is reflected toward the first focal point of the center mirror, and the reflected light that has passed through the first focal point is reflected by the center mirror and collected on the second focal point. The solar light collecting system according to claim 1, wherein the solar light collecting system is characterized.
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JP5342053B1 (en) * 2012-10-02 2013-11-13 信博 松本 Solar collector with concave mirror and convex lens
CN115854564A (en) * 2022-11-28 2023-03-28 哈尔滨工业大学 Sun tracking and gathering system based on photo-thermal method for exploiting water ice in moon polar region and design method

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JPH11119105A (en) * 1997-10-15 1999-04-30 Mitaka Koki Co Ltd Solar light converging system
JP2000146310A (en) * 1998-11-05 2000-05-26 Mitaka Koki Co Ltd Heliostat for solar light collecting system
JP2004037037A (en) * 2002-07-05 2004-02-05 Mitaka Koki Co Ltd Heliostat for sunlight condensing system and control method thereof

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JPS59116770U (en) * 1983-01-28 1984-08-07 株式会社日立製作所 heliostat
JPH11119105A (en) * 1997-10-15 1999-04-30 Mitaka Koki Co Ltd Solar light converging system
JP2000146310A (en) * 1998-11-05 2000-05-26 Mitaka Koki Co Ltd Heliostat for solar light collecting system
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JP5342053B1 (en) * 2012-10-02 2013-11-13 信博 松本 Solar collector with concave mirror and convex lens
WO2014054816A1 (en) * 2012-10-02 2014-04-10 Matsumoto Nobuhiro Solar heat collection device formed with concave mirror and convex lens
CN115854564A (en) * 2022-11-28 2023-03-28 哈尔滨工业大学 Sun tracking and gathering system based on photo-thermal method for exploiting water ice in moon polar region and design method
CN115854564B (en) * 2022-11-28 2023-10-20 哈尔滨工业大学 Solar tracking and focusing system based on photo-thermal mining moon polar region water ice method and design method

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