WO2011150849A1

WO2011150849A1 - Conical light focusing system

Info

Publication number: WO2011150849A1
Application number: PCT/CN2011/075078
Authority: WO
Inventors: 黄建文
Original assignee: Huang Chien-Wen
Priority date: 2010-06-01
Filing date: 2011-06-01
Publication date: 2011-12-08
Also published as: CN101872063A

Abstract

A conical light focusing system comprises at least one cone or frustum of cone shaped light reflecting plate (1) and a light collecting pillar (2) provided at the axis of the light reflecting plate (1). The inner surface of the light reflecting plate (1) is provided with a light reflecting layer. The larger opening of the light reflecting plate (1) is the light entrance port of the light focusing system. The conical light focusing system has a simple structure, and is easy to manufacture. And the intensity of the collected light is related to the area of the light reflecting plate (1), so that the light focusing system is easy to design and regulate.

Description

Conical concentrating system

The present invention relates to a solar concentrating system, and more particularly to a conical concentrating system that utilizes conical reflection to converge toward sunlight and appropriately utilizes the concentrated solar energy, and belongs to the field of solar energy technology. Background technique

Existing solar concentrating technologies can be divided into two types: refractive and reflective.

Refractive concentrating is the use of convex lenses or Fresnel lenses to converge sunlight. Due to the high production and manufacturing cost of lenticular lenses, it has not been used in the solar industry. The manufacture of Fresnel lenses requires high technical requirements. Since glass materials cannot suppress Fresnel lenses, they are currently manufactured using plexiglass or transparent nylon plastic. Such polymer materials absorb ultraviolet rays and cause aging. Therefore, Fresnel lenses are used in the field of solar concentrating industry, and lenses must be replaced at regular intervals, and the maintenance cost is too high.

Most of the reflective concentrating uses a flat mirror or a parabolic mirror to converge sunlight. The parabolic mirror is easy to obtain a higher magnification concentrating effect, but the manufacturing cost and process requirements are higher, and the production and installation speed is slower. Although the use of a flat mirror for concentrating light is inexpensive, it is not easy to obtain a high concentrating ratio.

Summary of the invention

The technical problem to be solved by the present invention is to provide a conical concentrating system that utilizes conical reflection to converge toward sunlight and appropriately utilize the concentrated solar energy. The conical concentrating system utilizes a conical reflecting surface to converge sunlight onto the central axis of the conical reflecting surface, and a collecting column is arranged at the central axis to achieve the purpose of concentrating sunlight and utilizing it.

In order to achieve the above object of the invention, the present invention adopts the following technical solutions;

A conical concentrating system comprising at least one reflector having a conical or truncated cone shape and a light collecting column disposed at an axis of the conical or truncated reflecting plate; reflecting on the inner side of the reflecting plate The larger side of the reflector is the light entrance of the concentrating system.

Preferably, the light collecting column has a polygonal cross section; a photovoltaic cell and/or a thermoelectric power generating sheet are attached to an outer surface of the light collecting column.

Preferably, a concentrating plate is further disposed around the photovoltaic cell and/or the thermoelectric power generation chip.

Preferably, a thermoelectric power generation piece is disposed on a bottom side or a top portion of the light collecting column; and a heat dissipating device is disposed on the other side of the thermoelectric power generation piece. Preferably, a heat transfer base is disposed on a bottom side of the light collecting column; a heat pipe or a water pipe is disposed in the heat transfer base, and heat energy is discharged through the heat pipe or the water pipe.

Preferably, a heat pipe or a water pipe is disposed in the light collecting column.

Preferably, a steam turbine generator is connected in series on the heat pipe or the water pipe line.

Preferably, the light collecting column adopts a vacuum tube collecting column.

Preferably, the angle between the reflector and its axis is 45°.

Preferably, the reflective layer is plated with a total reflection coating, and the surface of the collection column is plated with an anti-reflection coating.

Preferably, a solar tracker is further mounted on the cone concentrating system to enable the concentrating system to track the sunlight.

Preferably, a sealing cover is disposed at the light entrance of the concentrating system, so that the light receiving device of the concentrating system is in a sealed protection state.

Preferably, the light entrance of the reflector is polygonal.

Preferably, a photovoltaic cell or a thermoelectric power generation chip is disposed on the top of the light collecting column.

Preferably, at least one convex lens or Fresnel lens is disposed above the light collecting column; and the at least one convex lens or Fresnel lens concentrates the light on the photovoltaic cell or the thermoelectric power generating chip.

The beneficial effects of the invention are as follows: the intensity of the concentrated light energy of the cone concentrating system is related to the area of the reflector, and is easy to design and adjust. The conical concentrating system also has the advantages of rapid manufacturing, low cost of manufacturing and installation maintenance.

DRAWINGS

1 is a schematic structural view 1 of a first embodiment of a conical concentrating system;

2 is a schematic structural view 2 of a first embodiment of a conical concentrating system;

3 is a top view of a polygonal collector column of a second embodiment of a conical concentrating system;

4 is a schematic structural view of a third embodiment of a conical concentrating system;

5 is a schematic structural view of a fourth embodiment of a conical concentrating system;

6 is a schematic structural view 1 of a fifth embodiment of a conical concentrating system;

7 is a schematic structural view 2 of a fifth embodiment of a conical concentrating system;

8 is a top view of a group implementation of an eighth embodiment of a conical concentrating system;

9 is a schematic view showing a modified structure of a second embodiment of a conical concentrating system;

10 is a schematic structural view 1 of a ninth embodiment of a conical concentrating system;

Figure 11 is a second schematic view of the structure of the ninth embodiment of the conical concentrating system. LIST OF REFERENCE NUMERALS: Conical or truncated reflector 1 , collector 2 , thermoelectric generation 3 , heat sink 4 , heat transfer base 5 , concentrating plate 6

detailed description

The aspects of the structural composition, technical means and efficacy of the present invention are further described in conjunction with the specific embodiments in conjunction with the accompanying drawings:

Embodiment 1:

As shown in Figs. 1 and 2, the conical collecting system is composed of at least one reflecting plate 1 having a conical or truncated cone shape and a collecting column 2 provided at the axis of the conical or truncated reflecting plate 1. A light reflecting layer is provided on the inner side surface of the reflecting plate 1. The larger port side of the reflector 1 is the light entrance of the concentrating system.

The sunlight irradiated on the reflecting plate 1 is reflected by the reflecting layer and concentrated at the collecting column 2, thereby being utilized.

Compared with the existing concentrating device, the tapered concentrating system has the advantages of simple structure and convenient processing, and the intensity of the concentrated light energy is related to the area of the reflecting plate, and is easy to design and adjust.

It is not difficult to see that the normal operation of the concentrating system depends on the fact that the sunlight always remains incident parallel to the axis of the reflector 1. Only in this way can we ensure that the sunlight is reflected and the light beam is 2 points. Therefore, a solar tracker should be added to the cone concentrating system to ensure that the concentrating system always tracks the sunlight. Since there are many different forms of solar trackers on the market, the present invention no longer limits its specific structure.

According to the principle of light reflection, it is easy to see that the best angle between the reflector and its axis is 45°. In this way, the design of the light column 2 and the reflector 1 is flat and easy to install.

Further, in order to further increase the light collecting effect at the collecting column 2, the light energy loss of the light on the reflecting surface is reduced. The present invention also employs a total reflection coating on the light-reflecting layer, and an anti-reflection coating on the surface of the light-collecting column 2.

In addition, a sealing cover may be provided at the light entrance of the concentrating system to protect the light-receiving device of the concentrating system from being sealed and protected from damage to the light-reflecting layer and the light-collecting column.

Embodiment 2:

The main utilization of light energy can be the conversion of light energy into electrical energy through a photovoltaic cell, or the conversion of thermal energy caused by light energy into electrical energy by a thermoelectric power generation chip (the thermoelectric power generation chip can generate electrical energy based on the temperature difference between the two sides). Photovoltaic cells and thermoelectric power generation chips are mostly produced in the form of flat sheets. Based on this point of view, as shown in FIG. 3, the embodiment is further defined on the basis of the first embodiment, the cross section of the light collecting column 2 is a polygonal structure, and the outer surface of the polygonal light collecting rod 2 is attached. Photovoltaic cells and / or thermoelectric power generation Film.

In addition, it should be noted that this embodiment is only designed for the currently common planar sheet photovoltaic cells. However, with the development of solar cell technology, flexible solar cells such as thin film solar cells that can be curled have appeared. For this particular flexible solar panel, it can be directly attached to the concentrating column 2 of any cross-sectional shape without being limited by the polygonal concentrating column of this embodiment.

Moreover, since any photovoltaic cell and thermoelectric power generation chip are left in the package when there is a gap around it, when concentrated by the cone concentrating system, some concentrated light may not be irradiated on the battery sheet, resulting in Light energy is wasted. In view of this, as shown in Fig. 9, we also have a concentrating plate 6 around the photovoltaic cell or the thermoelectric power generation chip to solve such a problem.

Embodiment 3:

Because the power generation principle of the thermoelectric power generation chip is that there is a temperature difference between the heating surfaces on both sides to generate electric energy. Therefore, for this feature of the thermoelectric power generation chip, we can also design the application mode of this embodiment. As shown in Fig. 4, in the present embodiment, on the basis of the first embodiment, a temperature difference power generating sheet 3 is provided on the bottom side or the top of the light collecting column 2. A heat sink 4 is provided on the other side of the thermoelectric power generation sheet 3.

Thus, on the two heating surfaces of the thermoelectric power generation sheet 3, one side is connected to the light collecting column 2 at a higher temperature, and the other side is connected to the heat sink 4 at a lower temperature, thereby forming a temperature difference and generating electric energy.

Embodiment 4:

As shown in Fig. 5, in the present embodiment, on the basis of the first embodiment, a heat transfer base 5 is provided on the bottom side of the light collecting column 2. A heat transfer pipe or a water pipe is formed in the heat transfer base 5, and heat energy is led out through the heat pipe or water pipe for use. The heat transfer base 5 is made of metal.

The light collecting column 2 generates a high temperature due to irradiation with high intensity solar energy. The heat is conducted through the heat transfer base 5 and is led out by a heat pipe or a water pipe.

Embodiment 5:

As shown in Fig. 6, similar to the fourth embodiment, the present embodiment is provided with a heat pipe or a water pipe in the light collecting column 2 on the basis of the first embodiment. As described above, the light-collecting column 2 generates high temperature due to irradiation with high-intensity solar energy, and heat energy is derived by a heat pipe or a water pipe penetrating therethrough.

As shown in Fig. 7, the conical concentrating system is composed of a plurality of concentrating devices composed of a plurality of reflecting plates 1 and collecting columns 2. Then, each individual concentrating device can be connected in series through the heat pipe or the water pipe.

Example 6:

In this embodiment, on the basis of the fourth and fifth embodiments, a steam turbine generator may be connected in series to the heat pipe or the water pipe line, and the heated high temperature steam is used for power generation. Example 7:

As described above, the concentrating column 2 generates a high temperature due to exposure to high-intensity solar energy. This makes it easy for the collecting rod 2 to convect with the surrounding air, thereby reducing the energy conversion efficiency of the device. To solve this problem, the light collecting column 2 can be realized by using a transparent vacuum tube collecting column. Inside the transparent vacuum tube is a collecting column 2. Since the air is insulated by the transparent vacuum tube, the air does not contact the surface of the high temperature collecting column 2. Contact, this can reduce the thermal energy loss of the light collecting column 2. Since this is an existing technology, the vacuum tube collector of the solar water heater currently on the market is using this technology, and will not be described in depth here.

Example 8:

Since the energy concentrating by the individual concentrating devices composed of the single reflecting plate 1 and the collecting column 2 is limited, it is often implemented in a group implementation in actual use. However, since the circular entrance port leaves voids between the individual concentrating devices, the utilization of part of the light energy is lost. In view of this, as shown in FIG. 8, this embodiment transforms the light entrances of the respective concentrating devices into a polygonal structure, so that the respective concentrating devices can be closely coupled to each other when the group is implemented.

Example 9:

In the case of the conical concentrating system designed by the present invention, if the concentrating ratio is too small, there is obviously no practical economic benefit. Therefore, when concentrating through a truncated reflector, the reflector will generally be far away from the collector for a higher concentration ratio. The sunlight in the middle of the trellis reflector will not be used. In order to make reasonable use of this part of the sunlight, as shown in FIG. 10, in this embodiment, a photovoltaic cell or a thermoelectric power generation chip may be disposed on the top of the light collecting column 2, and the light energy is converted into the light energy by the photovoltaic cell or the thermoelectric power generation chip. Electrical energy.

However, if the area of the middle portion is large, it is costly to cover all of the parts with photovoltaic panels. In view of this, we have made some improvements to the above scheme. As shown in Fig. 11, we have at least one convex lens or Fresnel lens above the collecting rod 2, and the part of the sunlight is concentrated in a narrow area at the top of the collecting column, and a photovoltaic cell is arranged in the area at the top of the collecting column. Or a thermoelectric power chip to increase the utilization of sunlight.

In summary, the present invention realizes a solar concentrating system which is simple in structure and easy to process by a conical or truncated reflector. A series of solar application structures were designed for the system. Any unintended modifications made by those skilled in the art under this design concept are considered to be within the scope of the present invention.

Claims

Rights request

A conical concentrating system characterized by:

The conical concentrating system is composed of at least one reflector having a conical or truncated cone shape and a light collecting column disposed at an axis of the conical or truncated reflector;

a reflective layer is disposed on an inner side of the reflector, a larger port side of the reflector is a light entrance of the concentrating system; and a total reflection coating is plated on the reflective layer on the surface of the concentrating column An anti-reflection coating is plated; the cross-section of the light-collecting column is polygonal; a photovoltaic cell and/or a thermoelectric power generation chip are attached to an outer surface of the light-collecting column; and a temperature difference is generated on a bottom side or a top of the light-collecting column. a heat dissipating device is disposed on the other side of the thermoelectric power generation sheet;

a heat transfer base is disposed on a bottom side of the light collecting column; a heat pipe or a water pipe is disposed in the light collecting column and the heat transfer base, and heat energy is discharged through the heat pipe or water pipe;

At least one convex lens or Fresnel lens is disposed above the light collecting column; the convex lens or Fresnel lens concentrates light on the photovoltaic cell and/or the thermoelectric power generating sheet.

2. The conical concentrating system of claim 1 wherein:

A concentrating plate is disposed around the photovoltaic cell and/or the thermoelectric power generation chip.

3. The cone concentrating system of claim 1 wherein:

A steam turbine generator is connected in series to the heat pipe or water pipe line.

4. The cone concentrating system of claim 1 wherein:

A solar tracker is also added to the conical concentrating system to cause the conical concentrating system to track sunlight.

A conical concentrating system, characterized in that: the conical concentrating system comprises at least one reflector having a conical or truncated cone shape and a set provided at an axis of the conical or truncated reflector The light column is configured; a reflective layer is disposed on an inner side surface of the reflector; and a larger opening side of the reflector is an light entrance of the concentrating system.

6. The conical concentrating system according to claim 5, wherein: the concentrating column has a polygonal cross section; and a photovoltaic cell and/or a thermoelectric generating sheet is attached to an outer surface of the concentrating column.

7. The conical concentrating system according to claim 6, wherein: a concentrating plate is further disposed around the photovoltaic cell and/or the thermoelectric power generation chip.

8. The cone concentrating system according to claim 5, wherein: a temperature difference power generating sheet is disposed on a bottom side or a top portion of the light collecting column; and a heat dissipating device is disposed on the other side of the temperature difference power generating sheet.

The cone concentrating system according to claim 5, wherein: a heat transfer base is disposed on a bottom side of the light collecting column; and a heat pipe or a water pipe is disposed in the heat transfer base; Thermal energy is directed through the heat pipe or water pipe.

10. The conical concentrating system according to claim 5, wherein: a heat pipe or a water pipe is disposed in the concentrating column.

The conical concentrating system according to claim 9 or 10, characterized in that: a steam turbine generator is connected in series to the heat pipe or water pipe line.

12. The cone concentrating system according to claim 5, wherein: the light collecting column is a vacuum tube collecting column.

13. The conical concentrating system according to claim 5, wherein: the reflecting plate has an angle of 45 with respect to its axis.

14. The conical concentrating system according to claim 5, wherein: the reflective layer is plated with a total reflection coating, and the surface of the concentrating column is plated with an anti-reflection coating.

15. The conical concentrating system of claim 5, wherein: a solar tracker is further mounted on the conical concentrating system to cause the concentrating system to track sunlight.

16. The conical concentrating system according to claim 5, wherein: a sealing cover is disposed at an entrance of the concentrating system to enable the light receiving device of the concentrating system to be in a sealed protection state.

17. The conical concentrating system according to claim 5, wherein: the light entrance of the reflector is polygonal.

18. The conical concentrating system according to claim 5, wherein: a photovoltaic cell or a thermoelectric power generation chip is disposed at a top of the concentrating column.

19. The conical concentrating system according to claim 18, wherein: at least one convex lens or Fresnel lens is disposed above the concentrating column; and the at least one convex lens or Fresnel lens converges the light On the photovoltaic cell or thermoelectric power generation sheet.