A solar thermal power cogeneration system applied to building walls

Abstract

The invention relates to a solar thermal power cogeneration system applied to a building wall, comprising a frame body, a Fresnel lens fixed on the top of the frame body and a screw support fixed on the bottom of the frame body, a rectangular water jacket is installed on the upper end of the screw support, a heat dissipation plate is fixed on the rectangular water jacket, a temperature difference power generation module is arranged on the heat dissipation plate, a spherical cover with an inner reflector is arranged on the temperature difference power generation module, an optical fiber is inserted through the top of the spherical cover with the inner reflector, a photovoltaic panel and a spectroscope frame are fixedly installed on the right side of the frame body, an inclined spectroscope is installed on the photovoltaic panel and the spectroscope frame close to the spherical cover with the inner reflector, an inclined reflector is installed on the photovoltaic panel and the spectroscope frame away from the spherical cover with the inner reflector and at a position corresponding to the spectroscope, a photovoltaic panel is laid on the heat dissipation plate close to the right side of the spherical cover with the inner reflector below the photovoltaic panel and the spectroscope frame, so as to reduce heat loss and improve the temperature difference power generation efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of building solar energy utilization, and relates to a solar thermal power cogeneration system applied to building walls, and in particular to a photovoltaic power generation system with Fresnel lens focusing + beam splitter reflected light + reflector reflected light, a photothermal temperature difference power generation system with Fresnel lens focusing + beam splitter transmitted light + optical fiber light collection + internal reflector irradiation, and a heat collection system composed of a photovoltaic panel and a heat dissipation water jacket of a temperature difference generator. Background Art

[0002] As an important carrier of human civilization, buildings have grown rapidly with the development of the economy and society. According to relevant reports, my country's building energy consumption accounts for about 27.5% of the total social terminal energy consumption, while the proportion in developed countries is more than 40%. Therefore, building energy conservation and emission reduction are of great significance under the background of dual carbon.

[0003] The sunny side walls of high-rise buildings have large areas and regular shapes, which are particularly suitable for solar energy utilization. Generally, due to the high power generation efficiency of solar photovoltaics (~26%), people often arrange photovoltaic power generation on walls or window glass. At present, it is difficult to significantly improve the energy utilization efficiency of pure solar photovoltaics.

[0004] Considering that visible light has a high photoelectric conversion efficiency, while infrared and ultraviolet light have a very low photoelectric conversion efficiency, people have proposed a hybrid power generation system of solar photovoltaic and photothermal temperature difference, that is, using a spectroscope to reflect the visible light in sunlight for photovoltaic power generation, and at the same time using the infrared and ultraviolet light transmitted by the spectroscope to directly irradiate the temperature difference power generation module for photothermal temperature difference power generation. On the one hand, this method can reduce the temperature of the photovoltaic panel, which is conducive to improving the efficiency of photovoltaic power generation. On the other hand, hybrid temperature difference power generation can improve the power generation efficiency of the system to a certain extent. However, this method of using the light transmitted by the spectroscope to directly irradiate the temperature difference power generation module has a large heat loss, and the temperature of the hot end of the temperature difference power generation module is low, which has little effect on the overall power generation efficiency and energy utilization efficiency of the system. Summary of the invention

[0005] In view of this, the present invention provides a solar thermal power cogeneration system applied to building walls in order to solve the problems of large heat loss in the prior art method of utilizing solar temperature difference power generation modules, low hot end temperature of the temperature difference power generation modules, low temperature difference power generation efficiency, low overall power generation efficiency and energy utilization efficiency of the system.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A solar thermal power cogeneration system applied to a building wall comprises a frame body, a Fresnel lens fixed on the top of the frame body and a screw support fixed on the bottom of the frame body, a rectangular water jacket is installed on the upper end of the screw support, a heat dissipation plate is fixed on the rectangular water jacket, a temperature difference power generation module is arranged on the heat dissipation plate, a spherical mask with an inner reflector is arranged on the temperature difference power generation module, an optical fiber is inserted through the top of the spherical mask with the inner reflector, a photovoltaic panel and a spectroscope frame are fixedly installed on the right side of the frame body, an inclined spectroscope is installed on the photovoltaic panel and the spectroscope frame close to the spherical mask with the inner reflector, an inclined reflector is installed on the photovoltaic panel and the spectroscope frame away from the spherical mask with the inner reflector and at a position corresponding to the spectroscope, and a photovoltaic panel is laid on the heat dissipation plate close to the right side of the spherical mask with the inner reflector below the photovoltaic panel and the spectroscope frame.

[0008] The beneficial effects of this basic scheme are: the use of Fresnel lens to focus light and optical fiber to transmit can increase the light intensity, and at the same time, the optical fiber illuminates the hot end of the temperature difference power generation module in a closed space with an internal reflector, and reflects the radiant light of the hot end of the temperature difference generator back to the hot end of the temperature difference generator, thereby greatly reducing the radiation heat dissipation loss of the hot end of the temperature difference generator and improving the efficiency of temperature difference power generation; the rectangular water jacket can effectively reduce the temperature of the photovoltaic panel, improve the efficiency of photovoltaic power generation, increase the temperature difference of the temperature difference power generation module, and improve the efficiency of temperature difference power generation, while generating a large amount of hot water for domestic use, significantly improving the comprehensive utilization efficiency of solar energy.

[0009] Furthermore, the frame body is composed of an upper frame and a lower frame which are parallel to each other and of the same size, and four upper and lower frame pillars connecting the upper frame and the lower frame.

[0010] Further, the Fresnel lens is fixed to the upper frame by bolts.

[0011] Furthermore, the optical fiber is placed in the flexible wrapping tube, and the lower ends of the optical fiber and the flexible wrapping tube are inserted into the spherical cover with an inner reflector, and a hole matching the flexible wrapping tube is opened at the top of the spherical cover with an inner reflector.

[0012] Furthermore, there are two screw brackets, which are respectively installed in parallel on the inner side rails of the lower end frame, and two screws for fixing the heat dissipation plate are fixedly installed on each screw bracket. Beneficial effect: The optical fiber, the flexible wrapped tube, the spherical cover with an inner reflector, the screw for fastening the spherical cover and its connector, the temperature difference power generation module, the photovoltaic panel, the heat dissipation plate, and the rectangular water jacket can be moved left and right as a whole.

[0013] Furthermore, the screws for fixing the heat dissipation plate are passed through the rectangular water jacket and the heat dissipation plate in sequence, and the screws for fixing the heat dissipation plate near the bottom surface of the heat dissipation plate are sleeved with nuts for fixing the heat dissipation plate. Beneficial effect: The position of the heat dissipation plate in the vertical direction can be adjusted by the nuts for fixing the heat dissipation plate.

[0014] Furthermore, the outer surface of the spherical cover with an inner reflector is fixedly connected with a screw rod and a connector for fastening the spherical cover. The screw rod and the screw rod of the connector for fastening the spherical cover pass through the heat dissipation plate and are fixed by a nut for fastening the spherical cover.

[0015] Furthermore, the heat dissipation plate is provided with transverse strip holes adapted to the screw rod and its connector for fastening the spherical cover. Beneficial effect: the screw rod and its connector can move in the strip holes to achieve a higher coupling efficiency between the optical fiber and the transmitted light of the spectroscope.

[0016] Furthermore, a water jacket water inlet pipe is arranged on the left side of the rectangular water jacket, and a water jacket water outlet pipe is arranged on the right side. Beneficial effect: The temperature of the photovoltaic panel is reduced by cooling water, the power generation efficiency of the photovoltaic panel is improved, and the temperature difference of the temperature difference power generation module is increased.

[0017] Furthermore, there are multiple rectangular water jackets, each photovoltaic panel and temperature difference power generation module is circuit-connected in series with the photovoltaic panel and temperature difference power generation module of the adjacent unit, and the water jacket inlet pipes and water jacket outlet pipes of the adjacent units are connected to form a water jacket series connection.

[0018] The beneficial effects of the present invention are:

[0019] 1. The solar thermal power cogeneration system applied to the building wall disclosed in the present invention adopts Fresnel lens to focus light and optical fiber to transmit light, which can improve the light intensity. At the same time, the optical fiber illuminates the hot end of the temperature difference power generation module in a closed space with an internal reflector, and reflects the radiation light of the hot end of the temperature difference generator back to the hot end of the temperature difference generator, thereby greatly reducing the radiation heat dissipation loss of the hot end of the temperature difference generator and improving the efficiency of temperature difference power generation.

[0020] 2. The solar heat and power cogeneration system applied to the building wall disclosed in the present invention can effectively reduce the temperature of the cold end of the thermoelectric generator, increase the temperature difference of the thermoelectric power generation module, and improve the power generation efficiency of the thermoelectric generator through the rectangular water jacket, while generating a large amount of hot water for domestic use, thereby significantly improving the comprehensive utilization efficiency of solar energy.

[0021] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 It is a structural explosion diagram of the solar thermal power cogeneration system applied to the building wall of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the solar thermal power cogeneration system after assembly applied to the building wall of the present invention;

[0025] Figure 3 It is a right view of the solar thermal power cogeneration system of the present invention applied to the building wall;

[0026] Figure 4 It is a front view of the solar thermal power cogeneration system of the present invention applied to the building wall;

[0027] Figure 5 A top view of the solar thermal power cogeneration system of the present invention applied to a building wall;

[0028] Figure 6 This is a diagram showing the effect of multiple units in series connection in the solar thermal power cogeneration system of the present invention.

[0029] Figure numerals: Fresnel lens 1, bolt 2, upper frame 3, photovoltaic panel and spectrometer frame 4, reflector 5, pillars of upper and lower frames 6, temperature difference power generation module 7, heat dissipation plate 8, lower frame 9, spectrometer 10, optical fiber 11, flexible wrapped tube 12, spherical cover with internal reflector 13, nut 14 for fixing the heat dissipation plate, screw bracket 15, water jacket inlet pipe 16, water jacket outlet pipe 17, photovoltaic panel 18, rectangular water jacket 19, screw and connector 20 for fastening the spherical cover, nut 21 for fastening the spherical cover, nut 22 for fixing the photovoltaic panel, bolt 23 for fixing the photovoltaic panel, screw 24 for fixing the heat dissipation plate. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] like Figures 1 to 5 A solar thermal power cogeneration system applied to a building wall is shown, comprising a frame body, a Fresnel lens 1 fixed to the top of the frame body, and a screw bracket 15 fixed to the bottom of the frame body. The frame body is composed of an upper frame 3 and a lower frame 9 which are parallel and of the same size, and four upper and lower frame pillars 6 connecting the upper frame 3 and the lower frame 9. The upper and lower frame pillars 6 are four identical hollow cylinders. The Fresnel lens 1 is fixed to the upper frame 3 by bolts 2. The Fresnel lens 1 and the upper frame 3 can be square, rectangular or circular.

[0034] The two screw brackets 15 are respectively installed in parallel on the inner side guide rails of the lower end frame 9, and each screw bracket 15 is fixed with two screws for fixing the heat dissipation plate 8, which can realize the overall left and right movement of the optical fiber 11, the flexible wrapped tube 12, the spherical cover with an inner reflector 13, the screw for fastening the spherical cover and its connector 20, the temperature difference power generation module 7, the photovoltaic panel 18, the heat dissipation plate 8, and the rectangular water jacket 19. The upper end of the screw bracket 15 is installed with a rectangular water jacket 19, and the rectangular water jacket 19 is fixed with a screw rod. A heat dissipation plate 8 is provided, the area of ​​the heat dissipation plate 8 is larger than the area of ​​the rectangular water jacket 19, the screws for fixing the heat dissipation plate 8 are passed through the rectangular water jacket 19 and the heat dissipation plate 8 in sequence, and the screws 24 for fixing the heat dissipation plate near the bottom surface of the heat dissipation plate 8 are provided with nuts 14 for fixing the heat dissipation plate. The position of the heat dissipation plate 8 in the vertical direction can be adjusted by fixing the nuts 14 for fixing the heat dissipation plate, and two bolt holes matching the screws 24 for fixing the heat dissipation plate are provided at the four corners of the heat dissipation plate 8.

[0035] A water jacket inlet pipe 16 is arranged on the left side of the rectangular water jacket 19, and a water jacket outlet pipe 17 is arranged on the right side. Cooling water enters from the water inlet and flows out from the water outlet. The water flow reduces the temperature of the photovoltaic panel 18, improves the power generation efficiency of the photovoltaic panel 18, and increases the temperature difference of the temperature difference power generation module 7.

[0036] A temperature difference power generation module 7 is arranged on the heat dissipation plate 8, and the area of ​​the heat dissipation plate 8 is larger than the area of ​​the temperature difference power generation module 7. A spherical cover 13 with an internal reflector is arranged on the temperature difference power generation module 7. An optical fiber 11 is inserted into the top of the spherical cover 13 with an internal reflector. The optical fiber 11 is placed in a flexible wrapping tube 12. The lower ends of the optical fiber 11 and the flexible wrapping tube 12 are inserted into the spherical cover 13 with an internal reflector. A hole matching the flexible wrapping tube 12 is opened at the top of the spherical cover 13 with an internal reflector. The inner surface of the spherical cover 13 with an internal reflector has a reflective coating. When the projection of the temperature difference power generation module 7 on the horizontal plane is a square or a rectangle, the spherical cover 13 with an internal reflector is a four-sided hollow cover with an internal reflector.

[0037] The outer surface of the spherical cover 13 with an inner reflector is fixedly connected with a screw and a connector 20 for fastening the spherical cover. The screw portion of the screw and the connector 20 for fastening the spherical cover passes through the heat dissipation plate 8. The heat dissipation plate 8 is provided with a transverse strip hole adapted to the screw and the connector 20 for fastening the spherical cover. The screw and the connector 20 for fastening the spherical cover pass through the heat dissipation plate 8 and are fixed by a nut 21 for fastening the spherical cover. The screw and the connector 20 for fastening the spherical cover can move in the strip hole to achieve a higher coupling efficiency between the optical fiber 11 and the transmitted light of the spectroscope 10. There are two screws and the connector 20 for fastening the spherical cover, and the two screws and the connector 20 for fastening the spherical cover form an angle of 180°.

[0038] A photovoltaic panel and a spectroscope frame 4 are fixedly installed on the right side of the frame body, an inclined spectroscope 10 is installed on the photovoltaic panel and the spectroscope frame 4 near the spherical cover with an internal reflector 13, an inclined reflector 5 is installed at a position corresponding to the spectroscope 10 away from the photovoltaic panel and the spectroscope frame 4 with the internal reflector spherical cover 13, and a photovoltaic panel 18 is laid on the heat dissipation plate 8 below the photovoltaic panel and the spectroscope frame 4 near the right side of the spherical cover with an internal reflector, and is fixed by four identical nuts 22 for fixing the photovoltaic panel and four identical bolts 23 for fixing the photovoltaic panel.

[0039] When the solar thermal power cogeneration system applied to the building wall is used, sunlight in space is irradiated on the Fresnel lens 1 for focusing, the spectroscope 10 and the reflector 5 reflect the visible light in the sunlight to the photovoltaic panel 18 for photovoltaic power generation, the infrared and ultraviolet rays transmitted by the spectroscope 10 are collected by the optical fiber 11, and then irradiate the hot end of the temperature difference power generation module 7 in the closed cavity with the inner reflector, and the radiation light of the hot end of the temperature difference power generation module 7 is reflected back to the hot end of the temperature difference power generation module 7 by the closed cavity with the inner reflector, thereby greatly reducing the radiation heat loss of the hot end of the temperature difference power generation module 7 and significantly improving the temperature of the hot end of the temperature difference power generation module 7; at the same time, cooling water enters from the water jacket inlet pipe 16 and flows out from the water jacket outlet pipe 17. The flowing cooling water can reduce the temperature of the photovoltaic panel 18 and improve the photovoltaic power generation efficiency, and can also increase the temperature difference of the temperature difference power generation module 7 and improve the temperature difference power generation efficiency. The hot water flowing out from the water jacket outlet pipe 17 can be used for production and life, thereby improving the comprehensive utilization efficiency of solar energy.

[0040] like Figure 6 The above-mentioned solar thermal cogeneration system shown in the figure has multiple units connected in series, and there are multiple rectangular water jackets 19. The photovoltaic panels 18 of each unit can be connected in series through a circuit, and the temperature difference power generation modules 7 of each unit can also be connected in series through a circuit. The water jacket inlet pipes 16 and water jacket outlet pipes 17 of adjacent units are connected to form a water jacket series connection.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A solar thermal power cogeneration system applied to a building wall, characterized in that: It comprises a frame body, a Fresnel lens fixed on the top of the frame body and a screw bracket fixed on the bottom of the frame body, a rectangular water jacket is installed on the upper end of the screw bracket, a heat dissipation plate is fixed on the rectangular water jacket, a temperature difference power generation module is arranged on the heat dissipation plate, a spherical cover with an inner reflector is arranged on the temperature difference power generation module, an optical fiber is inserted through the top of the spherical cover with an inner reflector, a photovoltaic panel and a spectroscope frame are fixedly installed on the right side of the frame body, an inclined spectroscope is installed on the photovoltaic panel and the spectroscope frame close to the spherical cover with an inner reflector, a reflector is installed on the photovoltaic panel and the spectroscope frame far from the spherical cover with an inner reflector, the reflector and the spectroscope are in corresponding positions and are parallel to each other, and a photovoltaic panel is laid on the heat dissipation plate close to the right side of the spherical cover with an inner reflector below the photovoltaic panel and the spectroscope frame; The frame body is composed of an upper frame and a lower frame which are parallel to each other and of the same size, and four upper and lower frame pillars connecting the upper frame and the lower frame; The optical fiber is placed in a flexible wrapping tube, and the lower ends of the optical fiber and the flexible wrapping tube are inserted into a spherical cover with an inner reflector. A hole matching the flexible wrapping tube is provided at the top of the spherical cover with an inner reflector.

2. The solar thermal power cogeneration system applied to a building wall according to claim 1, characterized in that: The Fresnel lens is fixed on the upper frame by bolts.

3. The solar thermal power cogeneration system applied to a building wall according to claim 1, characterized in that: There are two screw rod brackets, which are respectively installed in parallel on the inner side guide rails of the lower end frame, and two screw rods for fixing the heat dissipation plate are fixedly installed on each screw rod bracket.

4. The solar thermal power cogeneration system applied to a building wall according to claim 3, characterized in that: The screw rods for fixing the heat dissipation plate are passed through the rectangular water jacket and the heat dissipation plate in sequence, and nuts for fixing the heat dissipation plate are sleeved on the screw rods for fixing the heat dissipation plate near the bottom surface of the heat dissipation plate.

5. The solar thermal power cogeneration system applied to a building wall according to claim 1, characterized in that: The outer surface of the spherical cover with an inner reflector is fixedly connected with a screw rod and a connector for fastening the spherical cover. The screw rod and the screw rod of the connector for fastening the spherical cover pass through the heat dissipation plate and are fixed by a nut for fastening the spherical cover.

6. The solar thermal power cogeneration system applied to a building wall according to claim 5, characterized in that: The heat dissipation flat plate is provided with transverse strip holes matched with the screw rods and the connectors for fastening the spherical cover.

7. The solar thermal power cogeneration system applied to a building wall according to claim 1, characterized in that: The left side of the rectangular water jacket is provided with a water jacket water inlet pipe, and the right side is provided with a water jacket water outlet pipe.

8. The solar thermal power cogeneration system applied to a building wall according to claim 7, characterized in that: There are multiple rectangular water jackets, each photovoltaic panel and temperature difference power generation module is connected in series with the photovoltaic panel and temperature difference power generation module of the adjacent unit, and the water jacket inlet pipes and water jacket outlet pipes of the adjacent units are connected to form a water jacket series connection.

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