CIRCULATION TYPE SPACE-BASED SOLAR POWER SYSTEM

Abstract

Disclosed is a circulation type space-based solar power system, the system including: one or more solar modules; a conveyor belt on which the solar modules are attached, whereby the solar modules move between a solar power generating position and a recovery position, the solar modules receiving sunlight to generate solar power in the solar power generating position, and not receiving sunlight in the recovery position; a driver moving the conveyor belt; and a protective plate blocking cosmic rays incident to the solar modules located in the recovery position. The system can generate solar power for a long time by moving the solar modules between the solar power generating position and the recovery position. While some of the solar modules generate solar power, the remaining solar modules having damage are recovered.

Claims

1. A circulation type space-based solar power system, the system comprising: one or more solar modules; a conveyor belt on which the solar modules are attached, whereby the solar modules move between a solar power generating position and a recovery position, the solar modules receiving sunlight to generate solar power in the solar power generating position, and not receiving the sunlight in the recovery position; a driver moving the conveyor belt; and a protective plate blocking cosmic rays incident to the solar modules located in the recovery position.

2. The system of claim 1, further comprising: a reflective plate increasing an amount of the sunlight incident to the solar modules located in the solar power generating position.

3. The system of claim 1, further comprising: a temperature control device controlling a temperature of the solar modules located in the recovery position.

4. The system of claim 1, wherein the system is applied to an artificial satellite, and the conveyor belt is provided on a paddle of the artificial satellite.

5. The system of claim 1, wherein the solar modules move between the solar power generating position and the recovery position at preset time intervals, or when an amount of the solar power generated by the solar modules located in the solar power generating position is equal to or less than a preset reference amount.

6. A circulation type space-based solar power system, the system comprising: one or more solar modules; a body having at least two module attaching surfaces on which the solar modules are attached; a turning device whereby the module attaching surfaces loaded with the solar modules move between a solar power generating position and a recovery position by turning of the body, the solar modules of the module attaching surfaces receiving sunlight to generate solar power in the solar power generating position, and not receiving the sunlight in the recovery position; and an openable protective plate provided on each of the module attaching surfaces, wherein when the openable protective plate is closed, cosmic rays incident to the solar modules located in the recovery position are blocked by the openable protective plate, and when the openable protective plate is opened, the sunlight is incident to the solar modules located in the solar power generating position.

7. The system of claim 6, wherein a reflective surface is provided on an inner surface of the openable protective plate.

8. The system of claim 6, wherein the openable protective plate is opened and closed by using a shape-memory alloy.

9. The system of claim 6, further comprising: a temperature control device controlling a temperature of the solar modules located in the recovery position.

10. The system of claim 6, wherein a cross-sectional shape of the body is a triangular or a quadrilateral shape such that the module attaching surfaces of the body are three or four surfaces, and one of the module attaching surfaces facing the Sun is located in the solar power generating position, and the remaining module attaching surfaces are located in the recovery position.

11. The system of claim 6, wherein the system is applied to an artificial satellite, and the body is a paddle of the artificial satellite.

12. The system of claim 6, wherein the module attaching surfaces loaded with the solar modules move between the solar power generating position and the recovery position at preset time intervals, or when an amount of the solar power generated by the solar modules located in the solar power generating position is equal to or less than a preset reference amount.

13. A method of generating solar power in space by using the system of claim 1, the method comprising: positioning some of the solar modules in the solar power generating position where the solar modules receive sunlight and generate solar power, and positioning the remaining solar modules in the recovery position where the solar modules having damage do not receive sunlight so as to be recovered; and moving the solar modules between the solar power generating position and the recovery position, wherein the moving of the solar modules is performed at preset time intervals, or when an amount of the solar power generated by the solar modules located in the solar power generating position is equal to or less than a preset reference amount.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description when taken in conjunction with the accompanying drawings, in which:

[0026] FIG. 1 is a view showing a circulation type space-based solar power system according to a first exemplary embodiment of the present invention; and

[0027] FIG. 2 is a view showing a circulation type space-based solar power system according to a second exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinbelow, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0029] FIG. 1 is a view showing a circulation type space-based solar power system according to a first exemplary embodiment of the present invention.

[0030] According to a first exemplary embodiment as shown in the figure, the system is applied to an artificial satellite, and is provided on a solar power generating paddle 2000 connected to an artificial satellite body 1000.

[0031] The system includes a plurality of solar modules 100, and a conveyor belt 220 moved by a driver 210. The conveyor belt serves as a turning device 200 moving the solar modules 100.

[0032] The solar modules 100 are attached on the conveyor belt 220, and are moved by the driver 210 moving the conveyor belt 220. Here, the solar modules 100 move between the front and rear positions denoted as A and B in FIG. 1. The front position, denoted as A, faces the Sun, and the rear position, denoted as B, faces the opposite direction of the Sun. The solar modules located in A generate solar power by receiving sunlight. The solar modules located in B do not generate solar power. However, the solar modules located in B are not just in an idle state. The solar modules located in B, are protected from cosmic rays, etc. by a protective plate 300 preventing the solar modules in B from being exposed to the severe environment of space. Therefore, performances of solar cells of the solar modules are recovered. Accordingly, the front position, denoted as A, is a solar power generating position, and the rear position, denoted as B, is a recovery position. By the moving of the conveyor belt 220, the solar modules located in the solar power generating position A move to the recovery position B, while the solar modules located in the recovery position B move to the solar power generating position A. According to the space-based solar power system of the first exemplary embodiment, the solar modules move between the solar power generating position A and the recovery position B.

[0033] Here, in the protective plate 300 protecting the solar modules in the recovery position B, it is desirable to include a temperature control device maintaining a suitable temperature for recovering the solar cells of the solar modules. In addition, it is desirable to provide a reflective plate 310 for supplying more sunlight to the solar modules located in the solar power generating position A.

[0034] A method of operating the space-based solar power system is by generating solar power in the solar power generating position A by using the solar modules that are degraded by being exposed to the severe environment of space, up to the time when the solar modules are capable of being recovered. The solar modules are moved to the recovery position B by the turning device, before sustain irreparable damage. Here, the solar modules recovered in the recovery position B move to the solar power generating position A, and generate solar power, thereby continuously generating solar power. The solar modules move between the solar power generating position A for generating solar power and the recovery position B for recovery. Therefore, it is possible to generate solar power for a long time in the severe environment of space.

[0035] Here, a degree of the damage to the solar modules, which is a criterion for moving the solar modules, varies depending on the type of the solar cells of the solar modules. The moving of the solar modules is performed at preset time intervals based on the type of the solar cells, or performed based on a degree of decrease in the amount of solar power, the decrease being caused by damage to the solar modules.

[0036] FIG. 2 is a view showing a space-based solar power system according to a second exemplary embodiment of the present invention.

[0037] According to the second exemplary, the system is applied to the artificial satellite, and is provided on the solar power generating paddle 2000 connected to the artificial satellite body 1000.

[0038] The system uses the solar power generating paddle 2000 as a body. Module attaching surfaces on which the solar modules 100 are attached are respectively provided on upper and lower surfaces of the body. The module attaching surfaces loaded with the solar modules move between the solar power generating position, denoted as A, and the recovery position, denoted as B, by the turning device 200 turning the paddle.

[0039] In common with the system of the first exemplary embodiment, the system of the second exemplary embodiment also includes the protective plate 300 protecting the solar modules located in the recovery position B from the cosmic rays, etc. However, unlike the system of the first exemplary embodiment, the paddle 2000 itself is turned, such that the protective plate 300 also moves between the solar power generating position A and the recovery position B. Therefore the protective plate 300 is an openable protective plate. The openable protective plate 300 is closed and protects the solar modules in the recovery position B, and the openable protective plate 300 is opened and allows the sunlight to incident to the solar modules in the solar power generating position A. Here, the openable protective plate 300 may be opened and closed by using a shape-memory alloy. The openable protective plate 300 may be opened and closed by using a temperature difference between the solar power generating position A and the recovery position B. In addition, when a reflective surface 310 is provided on an inner surface of the openable protective plate 300, the openable protective plate 300 opened in the solar power generating position A serves as a reflective plate.

[0040] FIG. 2 shows the paddle 2000 having two module attaching surfaces that are the upper and lower surfaces. However, the paddle may have three or four module attaching surfaces. In this case, one of the module attaching surfaces facing the Sun is located in the solar power generating position, and the remaining module attaching surfaces are located in the recovery position. When moving the three or four module attaching surfaces loaded with the solar modules, the time for the recovery in the recovery position is extended.

[0041] While the exemplary embodiments of the invention have been described above, the embodiments are only examples of the invention, and it will be understood by those skilled in the art that the invention can be modified in various forms without departing from the technical spirit of the invention. Therefore, the scope of the invention should be determined on the basis of the descriptions in the appended claims, not any specific embodiment, and all equivalents thereof should belong to the scope of the invention.