CN108954865B - Directional light transmission solar condensing device - Google Patents
Directional light transmission solar condensing device Download PDFInfo
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- CN108954865B CN108954865B CN201811004078.5A CN201811004078A CN108954865B CN 108954865 B CN108954865 B CN 108954865B CN 201811004078 A CN201811004078 A CN 201811004078A CN 108954865 B CN108954865 B CN 108954865B
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
Abstract
The embodiment of the application discloses a directional light transmission solar condensing device, which can realize the adjustment of the azimuth angle of solar rays under the action of a horizontal rotary table, and can realize the adjustment of the altitude angle of the solar rays under the action of a rotary fixing piece, so that the condensing focal point of the Fresnel lens coincides with the focal point of a directional regulator, the solar rays are condensed and transmitted through the directional regulator and a light pipe, the condensing and heat collection of solar energy are realized, an oil pipeline is not needed for heat transmission, and power devices such as a high-power oil pump are not needed, and the technical problems that the existing condensing device needs a large number of oil pipelines with long tube side, the heat loss of the whole heat collection system is easy to increase, and the loss of the system is increased due to the use of the high-power oil pump power device are solved.
Description
Technical Field
The application relates to the technical field of solar energy, in particular to a directional light transmission solar energy condensing device.
Background
The solar energy condensing technology is a technology of condensing sunlight on a certain area through a condensing system in a narrow area, and receiving energy by using a battery plate or a heat collecting component and utilizing the energy.
The most commonly used condensing device in the field of solar energy condensation is a reflective condenser, and has the advantages of simplicity and high efficiency, but when the traditional reflective condensing device is applied to a solar heat utilization system, a heat absorber needs to be arranged above the condensing device, so that the heat absorber can easily shade the reflective condenser, and the condensing effect and the absorption efficiency of the whole heat utilization system are affected. The Fresnel transmission condensing device can be used for solving the defects of the reflection condensing device, and the solar rays can be converged below the Fresnel lens, so that the effect that the heat absorber is arranged below the condensing device is achieved.
In order to achieve the large-scale and multifunctional purposes of the heat absorber, the traditional Fresnel transmission device is generally used for loading heat conducting media such as heat conducting oil at a condensing focal point to absorb heat, and then the heat is transferred to the heat absorber through devices such as an oil pipeline, an oil pump and the like, so that the separation of the condensing device and the heat absorber is achieved, and the large-scale and multifunctional purposes of the heat absorber are achieved. However, the mode needs a large number of oil pipelines with long tube side, the heat loss of the whole heat collection system is easy to increase, and the power devices such as a high-power oil pump and the like are put into use, so that the extra loss of the system is obviously increased.
Disclosure of Invention
The embodiment of the application provides a directional light transmission solar light gathering device, which solves the technical problems that the existing light gathering device needs to use a large number of oil pipelines with long tube passes, the heat loss of the whole heat collection system is easy to increase, and the loss of the system is increased due to the use of a high-power oil pump power device.
In view of this, the present application provides a directional light transmitting solar concentrating device, the device comprising:
The device comprises a base, a Fresnel lens, a lens support, a horizontal rotary table and a directional collimator;
The horizontal rotary table is of an annular structure and is arranged on the base;
the Fresnel lens is arranged on the lens support;
The lens support is fixed on the support column of the horizontal rotary table through a rotary fixing piece;
The directional collimator comprises: a light pipe and an orientation adjuster;
The light pipe is integrally connected with the orientation regulator;
The orientation regulator is of a rotary paraboloid structure;
The light-condensing focal point of the Fresnel lens coincides with the focal point of the orientation regulator.
Preferably, the apparatus further comprises: a stepping motor;
the stepping motor is electrically connected with the horizontal rotary table and used for controlling the horizontal rotary table to horizontally rotate and controlling the lens support to rotate around the rotary fixing piece.
Preferably, the orientation adjustor and/or the inner surface of the light pipe are coated with a highly reflective aluminum film.
Preferably, the apparatus further comprises: a fixed table;
the fixed table is arranged at the hollow position of the horizontal rotary table;
The fixed table is provided with a vertical shaft, the vertical shaft is provided with a mounting hole, and the mounting hole is used for being connected with a fixed support of the directional regulator.
Preferably, the apparatus further comprises: a counterweight load; the counterweight load is mounted on the lens support for balancing the lens support.
Preferably, the apparatus further comprises: a rotating shaft;
The rotating shaft is arranged on the support column and used for adjusting the torque of the rotary fixing piece and assisting the stepping motor to drive the rotary fixing piece.
Preferably, the directional collimator further comprises: a light pipe support;
the light pipe support is detachably connected with the light pipe and used for supporting the light pipe.
Preferably, the angle formed by the normal line of the Fresnel lens and the cross section of the orientation regulator is equal to the solar altitude angle.
Preferably, the minimum radius of the light pipe isJiao Zhunju of the orientation regulator is/>Wherein delta s is the solar divergence angle, f 1 is the fresnel lens focal length, h min is the minimum solar altitude angle, and R is the fresnel lens radius.
Preferably, the minimum radius of the light pipe is larger than or equal to the maximum radius of the light outlet of the orientation regulator.
From the above technical solutions, the embodiment of the present application has the following advantages:
In an embodiment of the present application, there is provided a directional light-transmitting solar concentrating device, including: the device comprises a base, a Fresnel lens, a lens support, a horizontal rotary table and a directional collimator; the horizontal rotary table is of an annular structure and is arranged on the base; the Fresnel lens is arranged on the lens bracket; the lens bracket is fixed on a support column of the horizontal rotary table through a rotary fixing piece; the directional collimator includes: a light pipe and an orientation adjuster; the light pipe is integrally connected with the directional regulator; the directional regulator is of a rotary paraboloid structure; the condensing focal point of the fresnel lens coincides with the focal point of the orientation adjuster. According to the device provided by the application, the Fresnel lens can adjust the azimuth angle of solar rays under the action of the horizontal rotary table, and can adjust the altitude angle of the solar rays under the action of the rotary fixing piece, the focusing focus of the Fresnel lens coincides with the focus of the directional regulator, the solar rays are focused and transmitted through the directional regulator and the light pipe, so that the focusing and heat collection of solar energy are realized, an oil pipeline is not required to be used for heat transmission, a power device of a high-power oil pump is not required, and the technical problems that the existing focusing device needs a large number of oil pipelines with long tube passes, the heat loss of the whole heat collection system is easy to increase, and the loss of the system is increased due to the use of the high-power oil pump power device are solved.
Drawings
FIG. 1 is a schematic diagram of a directional light-transmitting solar concentrator according to an embodiment of the present application;
FIG. 2 is a schematic diagram of the geometry of a solar ray passing through a Fresnel lens and an orientation adjuster according to an embodiment of the present application;
FIG. 3 is a schematic view of a first spot projection of a Fresnel lens according to an embodiment of the present application;
FIG. 4 is a schematic view of a projection of a second light spot from a Fresnel lens according to an embodiment of the present application;
Wherein, the reference numerals are as follows:
1. A base; 2. a Fresnel lens; 3. a lens holder; 4. a horizontal rotary table; 5. a directional regulator; 6. a rotary fixing member; 7. a rotating shaft; 8. a light pipe; 9. a light pipe support; 10. a vertical axis; 11. and (5) balancing the load.
Detailed Description
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be understood that the present application is applied to a solar concentrating system, please refer to fig. 1, fig. 1 is a schematic structural diagram of a directional light-transmitting solar concentrating device in an embodiment of the present application, as shown in fig. 1, fig. 1 includes a base 1, a fresnel lens 2, a lens support 3, a horizontal rotary table 4 and a directional collimator;
the horizontal rotary table 4 is of an annular structure and is arranged on the base 1;
The Fresnel lens 2 is arranged on the lens bracket 3;
the lens bracket 3 is fixed on the support column of the horizontal rotary table 4 through a rotary fixing piece 6;
The directional collimator includes: a light pipe 8 and an orientation adjuster 5;
The light pipe 8 is integrally connected with the orientation regulator 5;
the directional regulator 5 is of a rotary paraboloid structure;
The light-collecting focal point of the fresnel lens 2 coincides with the focal point of the directional regulator 5.
It should be noted that, in the embodiment of the present application, the solar ray tracking mode adopted by the directional light-transmitting solar concentrating device is a altitude-azimuth tracking mode, and it should be understood that, based on the embodiment of the present application, a polar axis tracking mode may also be used by those skilled in the art. According to the condensing device in the embodiment of the application, the adjustment result of the Fresnel lens 2 through the horizontal rotary table 4 and the rotary fixing piece 6 is that the solar rays are always perpendicular to the Fresnel lens 2, the condensing focus of the device in the embodiment of the application coincides with the focus of the orientation regulator 5, the focus is static relative to the ground in the process of tracking the solar rays by the Fresnel lens 2, and the rotary fixing piece 6 can be a rotating shaft.
In the embodiment of the present application, ideally, since the light-collecting focal point of the fresnel lens 2 coincides with the focal point of the directional regulator 5, the light rays collected by the fresnel lens 2 are emitted in parallel from the opening of the directional regulator 5 after being reflected by the directional regulator 5. In non-ideal cases, sunlight is not absolute parallel light, and has a certain sunlight divergence angle, so that a certain size of diffuse spots are formed on the orientation regulator 5 after the sunlight passes through the fresnel lens 2, and in addition, due to tracking errors and processing errors of the fresnel lens, damage or deformation caused in the process of installation, transportation or use and the like, the sunlight cannot obtain an ideal convergence point after being refracted through the fresnel lens 2, but has a certain area of light spot, and in the actual condensation process, the sunlight emitted from the opening of the orientation regulator 5 has a certain divergence angle. In order to restrict the solar rays reflected by the directional regulator 5, a light pipe 8 integrally connected with the directional regulator 5 is arranged, and the solar rays with a certain divergence angle emitted from the opening of the directional regulator 5 are restricted in a pipeline with a specific light passing area through the light pipe 8, so that the directional condensation of the solar rays is realized.
The directional light-transmitting solar condensing device provided by the embodiment of the application can be provided with an automatic tracker for automatically tracking solar rays, a control end controller of the automatic tracker can be arranged on the base 1, and a detection head of the automatic tracker is arranged above the Fresnel lens 2. The automatic tracker tracks the altitude and azimuth angle of the solar rays, the directional light-transmitting solar condensing device adjusts the lens support 3 according to the altitude and adjusts the horizontal rotary table 4 according to the azimuth angle, so that the solar rays are always perpendicular to the Fresnel lens 2, and the condensing focus of the Fresnel lens 2 is always coincident with the focus of the directional regulator 5.
The embodiment of the application provides a directional light transmission solar energy condensing device, which comprises: the Fresnel lens comprises a base 1, a Fresnel lens 2, a lens support 3, a horizontal rotary table 4 and a directional collimator; the horizontal rotary table 4 is of an annular structure and is arranged on the base 1; the Fresnel lens 2 is arranged on the lens bracket 3; the lens bracket 3 is fixed on the support column of the horizontal rotary table 4 through a rotary fixing piece 6; the directional collimator includes: a light pipe 8 and an orientation adjuster 5; the light pipe 8 is integrally connected with the orientation regulator 5; the directional regulator 5 is of a rotary paraboloid structure; the light-collecting focal point of the fresnel lens 2 coincides with the focal point of the directional regulator 5. According to the device provided by the application, the Fresnel lens 2 can adjust the azimuth angle of solar rays under the action of the horizontal rotary table 4, the adjustment of the altitude angle of the solar rays can be realized under the action of the rotary fixing piece 6, the focusing focus of the Fresnel lens 2 is overlapped with the focus of the directional regulator 5, the solar rays are focused and transmitted through the directional regulator 5 and the light guide pipe 8, the focusing and heat collection of solar energy are realized, an oil pipeline is not required to be used for heat transmission, a power device of a high-power oil pump is not required, and the technical problems that the existing focusing device is required to use a large number of oil pipelines with long tube side, the heat loss of the whole heat collection system is easy to increase, and the loss of the system is increased due to the use of the high-power oil pump power device are solved.
For easy understanding, referring to fig. 1, another embodiment of a directional light-transmitting solar concentrating device according to the present application specifically includes: the Fresnel lens comprises a base 1, a Fresnel lens 2, a lens support 3, a horizontal rotary table 4 and a directional collimator;
the horizontal rotary table 4 is of an annular structure and is arranged on the base 1;
The Fresnel lens 2 is arranged on the lens bracket 3;
the lens bracket 3 is fixed on the support column of the horizontal rotary table 4 through a rotary fixing piece 6;
The directional collimator includes: a light pipe 8 and an orientation adjuster 5;
The light pipe 8 is integrally connected with the orientation regulator 5;
the directional regulator 5 is of a rotary paraboloid structure;
The light-collecting focal point of the fresnel lens 2 coincides with the focal point of the directional regulator 5.
Further, the apparatus further comprises: a stepping motor;
the stepping motor is electrically connected with the horizontal rotary table 4 and is used for controlling the horizontal rotary table 4 to horizontally rotate and controlling the lens bracket 3 to rotate around the rotary fixing piece 6.
In the embodiment of the present application, a stepper motor may be provided to rotate the horizontal rotary table 4 and the lens support 3, the stepper motor may be connected to the horizontal rotary table 4 and the rotation fixing member 6, the stepper motor may be built-in, the number of stepper motors may be two, and the stepper motor may independently rotate the horizontal rotary table 4 in a horizontal direction and adjust the rotation fixing member 6 to rotate the lens support 3 in a vertical direction, so as to track an azimuth angle and a height angle of sunlight, so that the fresnel lens 2 and the solar rays in the condensing device in the embodiment of the present application are always kept vertical.
Further, the inner surface of the orientation adjustor 5 and/or the light pipe 8 is coated with a highly reflective aluminum film.
The high-reflection aluminum film is a reflective film that is formed by sputtering a layer of aluminum metal material on a transparent polyester film to reflect light to achieve the purpose of heat insulation.
Further, the apparatus further comprises: a fixed table;
The fixed table is arranged at the hollow position of the horizontal rotary table 4;
the fixed table is provided with a vertical shaft 10, and the vertical shaft 10 is provided with a mounting hole which is used for being connected with a fixed support of the directional regulator 5.
In the embodiment of the present application, the vertical shaft 10 is provided on the fixed base, and the mounting hole is provided on the vertical shaft 10 for connection with the fixed support of the orientation adjuster 5. It can be understood that, in order to make the light condensing device of the present application realize accurate directional light condensation during installation, before fixing the directional regulator 5, the direction of the parabolic opening of the directional regulator 5 needs to be adjusted, the fixing support may have one end fixedly connected with the body of the directional regulator 5, the other end embedded into the installation hole, the fixing support end embedded into the installation hole may have a spherical structure, and may freely rotate in the installation hole, and after confirming the direction of the parabolic opening of the directional regulator 5, an adhesive is poured into the installation hole to fix the fixing support on the vertical axis. The condensing focal point of the device of the embodiment of the application coincides with the focal point of the orientation adjuster 5, i.e. at the intersection point of the axis of the vertical shaft 10 and the axis of the rotary fixing member 6, the focal point is stationary relative to the ground during tracking of solar rays by the fresnel lens 2.
Further, the apparatus further comprises: a counterweight load 11; a counterweight load 11 is mounted on the lens holder 3 for balancing the lens holder 2.
It should be noted that, in order to balance the self-gravity of the lens support 3, in the embodiment of the present application, a counterweight load 11 is provided, and the counterweight load 11 is mounted on the lens support 3, it is to be understood that the mounting position of the counterweight load 11 on the lens support 3 may be set according to the actual use situation, and in the embodiment of the present application, the counterweight load 11 is provided at the bottom of the lens support 3.
Further, the apparatus further comprises: a rotating shaft 7;
the rotating shaft 7 is mounted on the support column and is used for adjusting the torque of the rotary fixing piece 6, and the auxiliary stepping motor drives the rotary fixing piece 6.
In the embodiment of the present application, in order to enable the stepper motor to better drive the lens support 3, the support of the horizontal rotary table 4 is further provided with the rotary shaft 7, and the torque of the rotary fixing member 6 is adjusted by the rotary shaft 7, so that the risk that the stepper motor drives the rotary fixing member 6 to be difficult to drive due to insufficient torque, thereby influencing the condensing effect is avoided.
Further, the directional collimator further comprises: a light pipe support 9;
the light pipe support 9 is detachably connected with the light pipe 8 and is used for supporting the light pipe 8.
It should be noted that, in the embodiment of the present application, in order to implement the long-distance directional condensation of the condensation device, the embodiment of the present application is provided with the light pipe support 9 to balance the gravity of the light pipe 8 itself, and it is understood that the setting position of the light pipe support 9 may be set according to the actual use condition, which is not particularly limited in the embodiment of the present application.
Further, the angle formed by the normal of the fresnel lens 2 and the cross section of the orientation regulator 5 is equal to the solar altitude.
Further, the minimum radius of the light pipe 8 isThe focal length of the orientation regulator 5 is/>Wherein delta s is the solar divergence angle, f 1 is the fresnel lens focal length, h min is the minimum solar altitude angle, and R is the fresnel lens radius.
Further, the minimum radius of the light pipe 8 is equal to or larger than the maximum radius of the light outlet of the orientation regulator 5.
It should be noted that, referring to fig. 1 to fig. 4, after sunlight passes through the fresnel lens 2, a diffuse spot with a radius r is obtained on the focal plane, and a relationship between the radius r of the diffuse spot and the focal length f 1 of the fresnel lens 2 is r=f 1·Δs, where Δ s is a divergence angle of the sunlight. Since the orientation regulator 5 in the embodiment of the application is fixed after the installation is completed, the size and shape of the projected area of the diffuse spots on the inner surface of the orientation regulator of the fresnel lens 2 can be correspondingly changed in the process of tracking sunlight. As shown in fig. 2, a line segment DC (D 'C') is a fresnel lens 2, a line segment NO (N 'O') is a focal length of the fresnel lens 2, a straight line where the line segment AB is located is a cross-sectional plane (parallel to a horizontal plane) of the directional regulator 5, a point O is a focal point of the directional regulator 5 (also a light-collecting focal point of the fresnel lens), and a solid line portion in fig. 2 is a case where a normal line of the fresnel lens 2 is perpendicular to the cross-sectional plane of the directional regulator 5, and at this time, the line segment AB represents both a diffuse spot and a projection of the diffuse spot on the cross-sectional plane of the directional regulator 5; the dashed line is the case where the normal to the fresnel lens 2 has a minimum angle a min with the cross-sectional plane of the directional regulator 5, in which case the diffuse spot becomes a 'B' and its projection onto the cross-sectional plane of the directional regulator 5 is a "B".
As can be seen from the geometrical diagram shown in fig. 2, when the angle between the normal of the fresnel lens 2 and the cross-sectional plane of the directional regulator 5 increases, the projection of the point B onto the cross-sectional plane of the directional regulator 5 moves to the side closer to the point O, i.e. the point B' is the furthest point for the projection of the diffuse spot onto the cross-sectional plane of the directional regulator 5. Therefore, in order to ensure that the light collected by the light collecting device through the fresnel lens 2 can be maximally emitted in parallel after being reflected by the directional regulator 5 in the annual tracking process, during the design process of the directional regulator 5, the light spot radius r should satisfy:
r≥lB"O；
Let the radius of the Fresnel lens 2 be R, the perpendicular BM to the point B intersects DC at the point M, and the auxiliary line B ' M ' is similarly calculated as the length of the line segment B ' O:
for εB "OB", the sine theorem knows:
Then there are:
Wherein:
lB'O＝lBO＝r＝f1·Δs；
Thus, the first and second substrates are bonded together,
In the embodiment of the application, the included angle alpha between the normal line of the Fresnel lens 2 and the transverse plane of the directional regulator 5 is equal to the sun height angle h of the position where the light condensing device is located, so that the minimum included angle alpha min between the normal line of the Fresnel lens 2 and the transverse plane of the directional regulator 5 meets the following conditions:
αmin＝hmin
namely, in the actual design of the directional regulator 5, the spot radius r 1 satisfies the following conditions without considering the tracking error, the processing error and the installation error of the condensing device:
in order to maximize the optical efficiency of the condensing means, as much of the spot as possible falls within the cross-sectional plane area centered on the focal point of the directional regulator, the center point of the fresnel lens 2 spot must coincide with the focal point of the directional regulator, while the focal distance P of the directional regulator 5 can be minimized for the same spot radius r 1 when the cross-sectional plane of the spot with the directional regulator 5 is tangential to the vertex (i.e., point O). Correspondingly, on the premise that the axial lengths of the directional regulators 5 are equal, the sizes of the light outlets are also minimum, namely, the light collecting device can obtain the maximum geometric light collecting ratio. Thus, the spot radius r 1 and the focal distance P of the directional regulator 5 satisfy:
Thus, there are
When the geometrical light-gathering ratio c is given, the geometrical relationship between the light spot and the plane of the orientation regulator 5 and the light pipe 8 is shown in FIG. 3, and in FIG. 3, the coordinates of the point A are known asThe effective condensing geometric area of the Fresnel lens 2 is pi R 2, the coordinates of the point B are (x 2,y2), the minimum radius of the light pipe is R 2, and a parabolic equation/>It can be seen that:
x2＝r2；
Thus, there are
Thus, given a converging ratio c, and given a Fresnel lens radius R and focal length f 1, the coordinates of point A areThe coordinates of the point B are/> I.e. the length along the axis of the directional regulator 5 is/>The maximum radius of the light outlet is/>The minimum radius of the light pipe is/>
When the light-emitting surface of the orientation regulator 5 continuously moves to the vertex O side until the light-emitting surface is tangent to the light spot, the maximum geometric light-collecting ratio of the light-collecting device can be obtained. At this time, the geometrical relationship between the light spot, the orientation adjuster 5 and the light guide 8 is shown in FIG. 4, and the coordinates of point B and point A are set as (x 2,y2) and (A) The minimum radius of the light pipe 8 is r 2, and parabolic equation/>It can be seen that:
x2＝r2；
y2＝2r1；
Thus, there are
Let the effective condensing geometric area of the fresnel lens 2 be pi R 2, the maximum geometric condensing ratio is:
at this time, the axial length of the orientation regulator 5 is The maximum radius of the light outlet isThe minimum radius of the light pipe 8 is/>
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (8)
1. A directional light transmitting solar concentrating device, comprising: the device comprises a base, a Fresnel lens, a lens support, a horizontal rotary table and a directional collimator;
The horizontal rotary table is of an annular structure and is arranged on the base;
the Fresnel lens is arranged on the lens support;
The lens support is fixed on the support column of the horizontal rotary table through a rotary fixing piece;
The directional collimator comprises: a light pipe and an orientation adjuster;
The light pipe is integrally connected with the orientation regulator;
The orientation regulator is of a rotary paraboloid structure;
The condensing focal point of the Fresnel lens coincides with the focal point of the orientation regulator;
The minimum radius of the light pipe is Jiao Zhunju of the orientation regulator isWherein delta s is the solar divergence angle, f 1 is the Fresnel lens focal length, h min is the minimum solar altitude angle, and R is the Fresnel lens radius;
The apparatus further comprises: a counterweight load; the counterweight load is arranged on the lens support and used for balancing the lens support, and the counterweight load is arranged at the bottom of the lens support.
2. The directional light transmitting solar concentrating device of claim 1 further comprising: a stepping motor;
the stepping motor is electrically connected with the horizontal rotary table and used for controlling the horizontal rotary table to horizontally rotate and controlling the lens support to rotate around the rotary fixing piece.
3. The directional light transmitting solar concentrator of claim 1, wherein the directional regulator and/or the light pipe inner surface is coated with a highly reflective aluminum film.
4. The directional light transmitting solar concentrating device of claim 1 further comprising: a fixed table;
the fixed table is arranged at the hollow position of the horizontal rotary table;
The fixed table is provided with a vertical shaft, the vertical shaft is provided with a mounting hole, and the mounting hole is used for being connected with a fixed support of the directional regulator.
5. The directional light transmitting solar concentrating device of claim 2 further comprising: a rotating shaft;
The rotating shaft is arranged on the support column and used for adjusting the torque of the rotary fixing piece and assisting the stepping motor to drive the rotary fixing piece.
6. The directional light transmitting solar concentrator of claim 1, wherein the directional collimator further comprises: a light pipe support;
the light pipe support is detachably connected with the light pipe and used for supporting the light pipe.
7. The directional light transmitting solar concentrator of claim 1, wherein the angle between the normal to the fresnel lens and the cross section of the directional regulator is equal to the solar altitude.
8. The directional light transmitting solar concentrator of claim 1, wherein the minimum radius of the light pipe is equal to or greater than the maximum radius of the light outlet of the directional regulator.
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| CN201811004078.5A CN108954865B (en) | 2018-08-30 | 2018-08-30 | Directional light transmission solar condensing device |
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| CN201811004078.5A CN108954865B (en) | 2018-08-30 | 2018-08-30 | Directional light transmission solar condensing device |
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