CN205080439U - System for utilize solar energy to acquire energy - Google Patents

Abstract

Provided is a system for harvesting energy by using solar energy, comprising: at least one set of fixed energy harvesting devices with fixed angles; and at least one set of movable energy harvesting devices arranged behind the at least one set of fixed energy harvesting devices. The solar energy harvesting system according to the embodiment of the utility model can greatly improve the installed capacity and full power hours of the existing angle-fixed solar energy harvesting system, and the component structure is stable and reliable.

Description

A system for harvesting energy from the sun

technical field

The invention relates to the field of power generation, and more specifically relates to a system for obtaining energy by utilizing solar energy.

Background technique

The world's energy sources are depleting day by day, and the development and utilization of renewable energy have broad prospects. It is the goal pursued by relevant industry insiders to utilize solar energy in an all-round and efficient manner. At the same time, with the introduction of photovoltaic subsidy policies in various countries, photovoltaic power generation has entered an unprecedented period of rapid development, but how to improve photovoltaic power generation efficiency and reduce power generation costs is still a long-term issue. In order to obtain the maximum power output of the photovoltaic power generation system, the solar cells must be installed in a certain orientation in combination with the geography, climate and solar resource conditions of the construction site, so as to ensure that the solar cells can obtain the most sunlight resources. If the solar cell is suitable for facing the sun, its power generation efficiency will reach the best state, and the photovoltaic tracking system is an effective means to solve this problem.

At present, photovoltaic tracking mainly includes three methods: elevation adjustment, azimuth adjustment, and simultaneous adjustment of elevation and azimuth. An important factor affecting the large-scale application of photovoltaic tracking systems is that in the process of tracking the sun, the greater the tracking angle, the greater the shadow length of photovoltaic tracking systems, and the shadows between photovoltaic tracking systems will block each other, which seriously affects The efficiency of the photovoltaic tracking system. The national standard stipulates that the interval between photovoltaic arrays should ensure that the front array does not block the shadow of the rear array from 9:00 to 15:00 on the winter solstice. Therefore, there are usually 6-8 meters wide intervals between the fixed-angle photovoltaic arrays to avoid shadows. This arrangement wastes a lot of land and cannot fully receive and convert sunlight radiation within the photovoltaic field range.

Chinese invention patent application CN104679018A proposes a single-axis photovoltaic tracking device. As shown in Figure 1, the single-axis photovoltaic tracking device includes a motor and a photovoltaic panel. The output shaft of the motor is provided with a reducer, and the reducer is connected to one end of the tracking shaft through a bearing. The second bearing with seat, the tracking rotating shaft is located between the bearing and the first bearing with seat, and the photovoltaic panel fixed installation support I is set, and the tracking rotating shaft is located above the second bearing with seat, and the second fixed installation support of the photovoltaic panel and the fixed installation support of the photovoltaic panel are installed. Seat 3 is respectively provided with connecting rod 1 and connecting rod 2. The upper end of photovoltaic panel fixed installation support 1, the end of connecting rod 1 and connecting rod 2 are triangular in shape and are all connected with the installation pole of the photovoltaic panel installation board. The photovoltaic panel is fixedly installed on Photovoltaic panels are installed on the board.

Chinese invention patent application CN104820442A proposes a disc photovoltaic tracker. As shown in Figure 2, the disc photovoltaic tracker includes an outer ring of the track, an inner ring of the track, a pitch support frame, a solar panel, a pitch drive mechanism, a circumferential drive mechanism, and a slide rail matched with the outer ring of the track; the pitch support frame It is connected with the outer ring of the track and the inner ring of the track to form an overall frame structure. The overall frame forms a fixed part and a movable part. The solar panel is fixedly connected with the movable part of the overall frame. It can drive the movable part to achieve pitching motion; the overall frame cooperates with the slide rail fixed on the ground through the outer ring of the track, and drives the overall frame to drive the solar panel to achieve circumferential rotation through the circumferential drive mechanism.

Chinese utility model patent application CN204615736U proposes a horizontally linked single-axis photovoltaic tracker. As shown in Figure 3, the horizontal linkage single-axis photovoltaic tracker includes more than two single-axis photovoltaic tracker units and chains; the single-axis photovoltaic tracker unit includes a base, a sprocket, a rotating shaft and a solar panel; one end of the rotating shaft It is movably connected with the base, the other end of the rotating shaft is fixedly connected to the solar panel, and the sprocket is coaxially fixedly connected to the outer circumference of the rotating shaft; more than two single-axis photovoltaic tracker units are equally spaced along the horizontal direction at the same level The single-axis photovoltaic tracker unit is fixed on the ground installation basis, and the synchronous transmission is realized through the cooperation of the chain and the sprocket. The single-axis photovoltaic tracker unit is powered by an external drive device, and the controller issues a rotation angle control to the drive device. instruction.

Chinese utility model patent application CN204613760U proposes a vertically linked single-axis photovoltaic tracker. As shown in Figure 4, the vertical linkage single-axis photovoltaic tracker includes more than two single-axis photovoltaic tracker units and chains, and the single-axis photovoltaic tracker unit includes a base, a sprocket, a sprocket bracket, a large bevel gear, The small bevel gear, the rotating shaft and the solar panel; the two ends of the rotating shaft are respectively connected to the base and the solar panel, the large bevel gear is coaxially fixedly connected to the rotating shaft, the sprocket is also fixedly connected to the small bevel gear, and the small bevel gear is connected to the rotating shaft. The large bevel gears are meshed; multiple single-axis photovoltaic tracker units are fixed on the ground installation foundation at equal intervals along the longitudinal direction, and the synchronous transmission is realized through the cooperation of chains and sprockets between the single-axis photovoltaic tracker units and is provided by an external drive device. Power, the controller issues a control command for the rotation angle to the driving device.

The technical solutions mentioned above have the following problems: 1) The distance between multiple groups of photovoltaic modules is greatly increased, and the area occupied by single-axis adjustable photovoltaic modules is about 35% larger than that of angle-fixed photovoltaic modules. Angle-fixed photovoltaic modules occupy an area increased by 50%. 2) The proportion of moving parts in the photovoltaic power generation system is high, the load of the driving mechanism is large, the structural stability is poor, and the adjustment device accounts for a high proportion of the total investment.

Contents of the invention

In view of one or more of the above problems, the present invention provides a system for harvesting energy from solar energy.

A system for harvesting energy from solar energy according to an embodiment of the present invention, comprising: at least one set of fixed energy harvesting devices with fixed angles; and at least one group of movable energy harvesting devices arranged behind at least one group of fixed energy harvesting devices department. Wherein, at least one group of movable energy harvesting devices can be independently arranged close to at least one group of fixed energy harvesting devices, or can be integrally arranged with at least one group of fixed energy harvesting devices.

In the system for harvesting energy from solar energy according to an embodiment of the present invention, at least one group of movable energy harvesting devices moves linearly, or one end thereof rotates around the other end.

In the system for harvesting energy from solar energy according to an embodiment of the present invention, when one end of at least one group of movable energy harvesting devices rotates around the other end, the rotation axis of the at least one group of movable energy harvesting devices is located at its front end.

In the system for harvesting energy from solar energy according to an embodiment of the present invention, the angle-adjusted height of at least one group of mobile energy harvesting devices meets the following conditions: under the condition of the sun's altitude angle at a selected moment, at least one group of mobile energy harvesting devices The shadow of the device does not block or blocks the rear fixed energy harvesting device within a controllable range.

In the system for harvesting energy from solar energy according to an embodiment of the present invention, at least one group of motion energy harvesting devices is provided with a motion drive mechanism, wherein the power required by the motion drive mechanism is provided by at least one group of fixed energy harvesting devices, Or it is provided by an external power source, and the motion drive mechanism adjusts at least one set of motion energy according to the radiation information measured by the solar energy harvesting system itself, or the radiation information obtained from the outside through wired and/or wireless means Get the rotation angle of the device.

In the system for harvesting energy from solar energy proposed in the present invention, the movable energy harvesting device can be placed at the lowest position during the time when there is no solar energy harvesting to reduce wind resistance, and the radiation received by the movable energy harvesting device can be eliminated during the movement. Dust on the surface improves the next day's power generation.

The solar energy harvesting system according to the embodiment of the present invention can greatly increase the installed capacity of the existing fixed-angle solar energy harvesting system without increasing the floor area and full power hours, and the component structure is stable and reliable.

Description of drawings

The present invention can be better understood from the following description of specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

Fig. 1 is a structural schematic diagram of an existing single-axis photovoltaic tracking device;

Fig. 2 is the structural representation of existing dish type photovoltaic tracker;

Fig. 3 is a structural schematic diagram of an existing horizontally linked single-axis photovoltaic tracker;

Fig. 4 is a structural schematic diagram of an existing vertically linked single-axis photovoltaic tracker;

5a-5c are schematic structural diagrams of a system for harvesting energy from solar energy according to an embodiment of the present invention;

6 and 7 are schematic diagrams of application examples of a system for harvesting energy from solar energy according to an embodiment of the present invention;

Fig. 8 is another structural schematic diagram of a system for harvesting energy from solar energy according to an embodiment of the present invention.

detailed description

Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configurations and algorithms presented below, but covers any modification, substitution and improvement of elements, components and algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention.

In view of one or more problems in the above-mentioned technical solutions, the present invention proposes a novel energy harvesting system using solar energy. Fig. 5 shows a schematic structural diagram of a system for harvesting energy from solar energy according to an embodiment of the present invention. As shown in FIG. 5 , the system for harvesting energy from solar energy includes a stationary energy harvesting device 101 - 1 with a fixed angle and a movable energy harvesting device 102 . In this embodiment, the movable energy harvesting device 102 and the stationary energy harvesting device 101-1 are integrated to simplify the structure, save materials and reduce the cost. Wherein, the movable energy harvesting device 102 is arranged at the rear of the fixed energy harvesting device 101-1, and when the movable energy harvesting device 102 rotates, its rotation axis is at the same height as the top of the fixed energy harvesting device 101-1 The power supply of the motion driving mechanism that promotes the movement of the movable energy harvesting device 102 with adjustable angle is from an external power source, so as to ensure that the power of the movable energy harvesting device 102 can still be adjusted when the power generation of the fixed energy harvesting device 101-1 is insufficient. Angular position (of course, it can also come from the stationary energy harvesting device 101-1).

For the change of sunlight altitude angle in a day, by setting the movable energy harvesting device 102 at the rear of the fixed energy harvesting device 101-1 at a given angle, and adjusting the angle of the movable energy harvesting device 102 in real time by using radiation tracking technology, A system that harvests energy from the sun can increase the efficiency with which it utilizes the light resources projected on it. Specifically, when rotating motion is generated, the end of the mobile energy harvesting device 102 close to the fixed energy harvesting device 101-1 is provided with a hinge point (ie, a fulcrum of rotation), and can rotate around the hinge point. The radiation receiving area of the solar radiation harvesting system can be increased by adjusting the angle of the movable energy harvesting device 102 using conventional radiation tracking technology, and the effective radiation receiving area can be improved by adjusting the angle, thereby Significantly increases the full operating hours of systems utilizing solar energy harvesting within a given site.

Here, the angle adjustment strategy for the mobile energy harvesting device 102 is: under the condition of the current sun altitude angle, the shadow of the mobile energy harvesting device 102 does not block the fixed energy harvesting device 101-2 behind, or in a controllable The fixed energy harvesting device 101-2 behind is partially blocked within the range. The essence of this adjustment strategy is to abandon the low-quality sunlight irradiation period with a large inclination angle in the morning and evening periods, which is severely refracted by the atmosphere, and increase the energy obtained by using solar energy for actually receiving sunlight radiation for the period of time when the sun is high and the irradiance is good. The illuminated area of the system can realize the full reception of energy during periods of strong sunlight.

As shown in Figure 5a, when the sun is low in the morning and afternoon, the fixed energy harvesting device 101-1 at a normal angle receives sunlight and uses solar energy to harvest energy (for example, power generation), at this time the mobile energy harvesting device 102 In the stowed position, the fixed energy harvesting device 101-2 behind it will not be blocked; when the sun altitude angle exceeds the normal angle, the distance between the top of the fixed energy harvesting device 101-1 and the bottom of the fixed energy harvesting device 101-2 When the angle between the connecting line and the ground is reached, the mobile energy harvesting device 102 turns to the working position. b in Fig. 5 shows the months when the sun altitude angle is relatively high in summer and autumn, and the fixed energy harvesting devices 101-1, 101-2 and the movable energy harvesting device 102 at normal angles all receive sunlight radiation effectively, and the moving energy The receiving effect of the acquisition device 102 is better than that of the fixed energy acquisition devices 101-1 and 101-2 at normal angles. As shown in c in FIG. 5 , the spring and winter months when the sun altitude angle is relatively low, the mobile energy harvesting device 102 also shows a good receiving effect.

It should be understood by those skilled in the art that the system for harvesting energy from solar energy according to the embodiment of the present invention may include two or more sets of fixed energy harvesting devices, and movable energy harvesting devices placed in cooperation with them (between them The positional relationship shown in FIG. 5 ), so the scope of the present invention is not limited to the situation shown in FIG. 5 . In addition, those skilled in the art should understand that the movable energy harvesting device 102 can also be independently disposed close to the fixed energy harvesting device 101-1, and move linearly or rotationally relative to the fixed energy harvesting device 101-1.

In the following, a system for obtaining energy by utilizing solar energy according to an embodiment of the present invention will be described with an example. Fig. 6 and Fig. 7 show application examples of the system for harvesting energy from solar energy according to an embodiment of the present invention. Here, the 300-watt photovoltaic module commonly used in the photovoltaic field with fixed angle is used as the object, and the additional transformation is carried out (that is, in this example, the fixed energy harvesting device is an angle-fixed photovoltaic module, and the movable energy harvesting device is an angle-adjustable Photovoltaic modules, a system that uses solar energy to obtain energy is a photovoltaic power generation system). As shown in Figures 6 and 7, a set of push rod motors is hingedly fixed on the rear column of the angle-fixed photovoltaic module bracket. The top of the push rod motor is hinged with a very short universal joint to accommodate rotation. The change in angle between parts. Push rod motors, universal joints, angle-adjustable photovoltaic module trusses, and angle-fixed photovoltaic module support rear columns constitute a three-link mechanism. By controlling the expansion and contraction of the push rod of the push rod motor, the adjustable angle photovoltaic modules Make angle changes.

Since the angle adjustment strategy adopted by the system for obtaining energy from solar energy according to the embodiment of the present invention is to maximize the use of sunlight radiation resources with a large elevation angle, the power supply of the push rod motor can be directly obtained from the angle-fixed photovoltaic module, so it can It greatly simplifies the system wiring and also helps to reduce the system cost. Fig. 6 shows a state where the angle-adjustable photovoltaic module is in a light-shielding position in an application example of a system for harvesting energy from solar energy according to an embodiment of the present invention.

When the sun altitude angle exceeds the angle between the top of the previous row of fixed-angle photovoltaic modules (for example, 101-1) and the bottom of the next row of fixed-angle photovoltaic modules (for example, 101-2) and the ground Finally, the control system (not shown in the figure) drives the push rod motor to move the angle-adjustable photovoltaic module (for example, 102) up gradually, and ensures the shadow of the angle-adjustable photovoltaic module under the sun altitude angle condition at this moment. Do not block the rear row of angle-fixed photovoltaic modules. Fig. 7 shows a state in which an angle-adjustable photovoltaic module is in a working position in an application example of a system for harvesting energy from solar energy according to an embodiment of the present invention. In addition, combined with Figures 5a-5c, it can be seen from Figure 6 that when the angle-adjustable photovoltaic modules are in the dark position, they can also have the beneficial effect of reflecting sunlight, which is beneficial to the additional issuance of the angle-fixed photovoltaic modules in the latter row.

In addition, the fixed-angle photovoltaic module can be a concentrating solar panel, and the adjustable-angle photovoltaic module can obtain solar energy through reflection, and then reflect the obtained solar energy to the fixed-angle photovoltaic module set in front, Further increase the solar energy value received by the angle-fixed photovoltaic modules. Fig. 8 shows a schematic structural diagram of a photovoltaic power generation system adopting a reflective structure. As shown in FIG. 8 , the angle-adjustable photovoltaic component 102 reflects solar energy to the angle-fixed photovoltaic component 101 - 1 or 101 - 2 , which further increases the value of solar energy received by the angle-fixed photovoltaic component.

In addition, those skilled in the art should understand that the fixed or movable energy harvesting devices mentioned here can use solar energy to harvest energy in one or more of the following ways: direct reception, concentrated light reception, reflective reception, or any combination of them. Moreover, the fixed or movable energy harvesting device mentioned here may be a photovoltaic module, a photothermal module, a light reflection module, or any combination thereof.

The system for obtaining energy by using solar energy according to the embodiment of the present invention can greatly increase the installed capacity of the system and the number of effective power generation hours, and the land utilization rate is high; and the combination of the angle fixed type and the movable energy acquisition device makes the adjustment mechanism work load small and the cost is low .

The present invention may be embodied in other specific forms without departing from its spirit and essential characteristics. For example, the algorithms described in certain embodiments may be modified without departing from the basic spirit of the invention in terms of system architecture. Therefore, the present embodiments are to be considered in all respects as illustrative rather than restrictive, the scope of the present invention is defined by the appended claims rather than the above description, and, within the meaning and equivalents of the claims, All changes in scope are thereby embraced within the scope of the invention.

Claims (12)

1. utilize sun power to obtain a system for energy, comprising:

At least one group of fixed energy acquiring device that angle is fixing; And

At least one group of campaign-styled energy acquiring device, is arranged on described at least one group of fixed energy acquiring device rear portion.

2. utilize sun power to obtain the system of energy as claimed in claim 1, it is characterized in that, described at least one group of campaign-styled energy acquiring device approaches described at least one group of fixed energy acquiring device and independently arranges, or with described at least one group of fixed energy acquiring device whole installation.

3. utilize sun power to obtain the system of energy as claimed in claim 1, it is characterized in that, described at least one group of campaign-styled energy acquiring device rectilinear motion or its one end are around other end rotary motion.

4. utilize sun power to obtain the system of energy as claimed in claim 1, it is characterized in that, when one end of described at least one group of campaign-styled energy acquiring device is around other end rotary motion, the rotation of described at least one group of campaign-styled energy acquiring device is positioned at himself front end.

5. utilize sun power to obtain the system of energy as claimed in claim 4, it is characterized in that, described at least one group of campaign-styled energy acquiring device is provided with motion driving mechanism.

6. utilize sun power to obtain the system of energy as claimed in claim 5, it is characterized in that, the electric energy needed for described motion driving mechanism is by described at least one group of fixed energy acquiring device or provided by external power source.

7. utilize sun power to obtain the system of energy as claimed in claim 5, it is characterized in that, described motion driving mechanism utilizes the irradiation information that the system self of sun power acquisition energy records or the anglec of rotation being adjusted described at least one group of campaign-styled energy acquiring device by the Lighting information that wired and/or wireless mode obtain from outside according to described.

8. utilize sun power to obtain the system of energy as claimed in claim 1, it is characterized in that, the principle that described at least one group of fixed or campaign-styled energy acquiring device utilizes sun power to obtain energy is photovoltaic principle, photo-thermal principle, light reflection principle or their combination in any.

9. utilize sun power to obtain the system of energy as claimed in claim 1, it is characterized in that, the mode that described at least one group of fixed or campaign-styled energy acquiring device utilizes sun power to obtain energy is direct reception, optically focused receives, reflection receivable or their combination in any.

10. utilize sun power to obtain the system of energy as claimed in claim 1, it is characterized in that, on the equipment that described at least one group of fixed or campaign-styled energy acquiring device is set up on the ground or can rotates.

11. utilize sun power to obtain the system of energy as claimed in claim 8, it is characterized in that, when the principle that described at least one group of campaign-styled energy acquiring device utilizes sun power to obtain energy is light reflection principle, described light reflection principle is by reflection configuration realization at least one times.

12. utilize sun power to obtain the system of energy as claimed in claim 11, and it is characterized in that, the rotary motion that described reflection configuration is at least one times described at least one group of campaign-styled energy acquiring device, rectilinear motion or the combination both them realize.