Compound paraboloid condensation type solar full-spectrum utilization equipment

Abstract

The utility model belongs to the technical field of solar energy equipment, and particularly relates to a compound paraboloid condensation type solar energy full spectrum utilization device. The utility model relates to a compound paraboloid condensation type solar full-spectrum utilization device, which comprises a stainless steel foundation frame and a compound paraboloid condenser rotationally arranged on the stainless steel foundation frame through a direct-current push rod, the compound paraboloid condenser comprises a frame and an electroplated aluminum oxide plate, the frame comprises an aluminum alloy outer frame and a stainless steel pipe arranged on the aluminum alloy outer frame, a transverse pipe is arranged on the stainless steel pipe, and the electroplated aluminum oxide plate is fixedly arranged on the side wall of the stainless steel pipe. According to the utility model, large-area sunlight is gathered to a small area through the condenser, then light energy is converted into electric energy by utilizing the high-performance photovoltaic cell, and the solar radiation intensity in unit area is obviously improved by gathering the sunlight, so that the photoelectric conversion efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of solar energy equipment technology, specifically relating to a composite parabolic concentrating solar full-spectrum utilization device. Background Technology

[0002] The solar spectrum is characterized by a broad, continuous spectrum interspersed with absorption and emission lines. Its energy distribution exhibits a certain regularity with wavelength. These characteristics form the theoretical basis for the solar full-spectrum utilization hydrogen production technology in this invention. The solar spectrum, as shown in the diagram, possesses the following characteristics:

[0003] (1) Thermal radiation characteristics: The radiation intensity of the solar spectrum varies with wavelength, which conforms to the blackbody radiation law. The radiation intensity gradually decreases with increasing wavelength, showing a peak in the visible spectrum range (400nm-700nm), and then gradually decreases towards the ultraviolet and infrared sides.

[0004] (2) Ultraviolet and Infrared Radiation: The intensity of solar radiation gradually decreases at both ends of the visible spectrum. In the ultraviolet region, although the radiation intensity decreases, it is still higher than that of infrared light, especially in the short-wave ultraviolet region. In the infrared region, the radiation intensity gradually decreases, but there is still a certain degree of radiation.

[0005] (3) Absorption lines and emission lines: In addition to the continuous spectrum, there are also absorption lines and emission lines in the solar spectrum. Absorption lines usually appear at some wavelengths of the visible spectrum, appearing as dark lines or dark areas, while emission lines appear as bright lines or spectral peaks.

[0006] According to national standards, the solar intensity of an AM1.5 standard is 1000 W / m². 2 It includes a wavelength range of 300-4000nm, with an ultraviolet band (300-380nm) radiation intensity of 30W / m. 2 It accounts for 3.0% of the total solar radiation intensity, with a visible light intensity (300-780nm) of 533W / m². 2 It accounts for 53.3% of the total solar radiation intensity, with a near-infrared (780-1100nm) radiation intensity of 237W / m. 2 This accounts for 23.7% of the total solar radiation intensity. Common photovoltaic modules can operate in the 300-1100nm wavelength range, including ultraviolet, visible, and near-infrared light, totaling 800W / m². 2 It accounts for 80% of the total solar radiation intensity, with the strong absorption region of crystalline silicon located at 700-1100nm, exhibiting a radiation intensity of 330W / m. 2 It accounts for 33% of the total solar radiation intensity. The main absorption region of amorphous silicon is in the 300-700nm range, with a radiation intensity of 470W / m.2 It accounts for 47% of the total solar radiation intensity.

[0007] For photovoltaic (PV) power generation, most of the solar radiation energy projected onto the surface of PV cells only generates parasitic heat. This parasitic heat arises from two main causes: firstly, photons with energy less than the PV cell's bandgap (Eg) only produce phonons. For example, the absorption range of monocrystalline silicon PV cells is 300nm-1100nm; light waves with wavelengths greater than 1100nm irradiating the surface only produce phonons, ultimately converting into parasitic heat. Secondly, after photons with energy exceeding Eg excite electron-hole pairs, the remaining energy is dissipated as heat. Therefore, monocrystalline silicon has a relatively low conversion efficiency for ultraviolet light. Parasitic heat is detrimental to PV cells, increasing their temperature and reducing their photoelectric conversion efficiency by 0.4%–0.65% / ℃. It also accelerates the decay of photoelectric conversion efficiency and, in severe cases, can even cause them to fail completely. Of the incident solar radiation, 82%–85% is converted into parasitic heat by photovoltaic cells or reflected into the environment. Ultimately, photovoltaic cells can only convert the remaining 15%–18% into electrical energy, resulting in a low overall solar energy utilization rate. Therefore, in order to effectively utilize the full spectrum of solar energy while reducing the surface temperature of photovoltaic panels, the proposed solution involves installing cooling channels on the back of the photovoltaic cells. This lowers the operating temperature of the photovoltaic cells, improves their photoelectric conversion efficiency, and simultaneously recovers the heat energy of the heat exchange medium, ultimately achieving combined heat and power (CHP). Utility Model Content

[0008] To address the aforementioned problems, this utility model proposes a composite parabolic concentrator solar full-spectrum utilization device. In terms of design, it adopts a metal frame structure, and the concentrating part adopts an integral composite parabolic concentrator. In terms of tracking design, it adopts a single-axis tracking mode, that is, the device is fixed in the due south direction and uses a DC electric push rod to track the solar altitude angle (north-south axis).

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A composite parabolic concentrator solar full-spectrum utilization device includes a stainless steel base frame and a composite parabolic concentrator that is rotatably mounted on the stainless steel base frame via a DC push rod.

[0011] The composite parabolic concentrator includes a frame and an electroplated aluminum oxide plate. The frame includes an aluminum alloy outer frame and a stainless steel tube set on the aluminum alloy outer frame. A horizontal tube is set on the stainless steel tube, and the electroplated aluminum oxide plate is fixedly set on the side wall of the stainless steel tube.

[0012] Preferably, the electroplated aluminum oxide plate has a U-shaped structure, with a rotating shaft at the bottom and a rotating seat at the top of the stainless steel base frame, and the rotating shaft is rotatably mounted on the rotating seat.

[0013] Preferably, the inner bottom of the electroplated alumina plate is provided with a concentrating photovoltaic module and a photovoltaic heat dissipation backplate stacked one on top of the other.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By concentrating sunlight from a large area to a small area, and then using high-performance photovoltaic cells to convert light energy into electrical energy, the intensity of solar radiation per unit area is significantly increased by concentrating sunlight, thereby improving the photoelectric conversion efficiency.

[0016] 2. Because the size of photovoltaic cell modules is reduced after light concentration, more efficient heat dissipation structures can be designed to fully absorb parasitic heat on the surface of the photovoltaic panel, thereby reducing the surface temperature of the photovoltaic module and improving the photoelectric conversion efficiency of the photovoltaic module.

[0017] 3. After concentration, the size of the photovoltaic module is reduced, and the size of the heat dissipation channel can also be reduced accordingly, saving the cost of the heat dissipation channel component. At the same time, the energy density increases after concentration, which is conducive to further utilization of the parasitic heat energy generated by the photovoltaic module. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the hydrogen production equipment of this utility model;

[0021] Figure 2 This is a top view of the hydrogen production equipment of this utility model;

[0022] Figure 3 This is a side view of the hydrogen production equipment of this utility model;

[0023] Figure 4 This is a side view of the composite parabolic concentrator of this utility model;

[0024] Figure 5 This is a diagram showing the internal flow channel structure of the photovoltaic heat dissipation backplate of this utility model.

[0025] Figure 6 This is a diagram showing the back panel layout of the photovoltaic heat dissipation channel of this utility model.

[0026] The components include: 1. Stainless steel base frame, 101. Rotating seat, 2. DC push rod, 3. Composite parabolic concentrator, 301. Frame, 3011. Stainless steel tube, 3012. Stainless steel tube, 302. Electroplated alumina plate, 3021. Rotating shaft, 4. Bearing, 5. Concentrating photovoltaic module, and 6. Photovoltaic heat dissipation channel backplate. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-6 The preferred embodiments of the present invention will be described herein. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] Example 1:

[0029] A composite parabolic concentrator solar full-spectrum utilization device includes a stainless steel base frame 1 and a composite parabolic concentrator 3 rotatably mounted on the stainless steel base frame 1 via a DC push rod 2.

[0030] Furthermore, the original length of the DC actuator 2 is 655mm, and the stroke is 500mm.

[0031] The composite parabolic concentrator is composed of a frame 301 and an electroplated aluminum oxide plate 302. The frame 301 is composed of a wire-cut aluminum alloy outer frame 3012 and a stainless steel tube 3011. The aluminum alloy outer frame 3012 is formed by cutting aluminum alloy plates according to... Figure 4 Formed by wire cutting or laser cutting, with a thickness of 14mm, a composite parabolic concentrator has 5 aluminum alloy frames. The function of the aluminum alloy frames 3012 is to form the overall shape of the composite parabolic concentrator.

[0032] Stainless steel tubes 3011 pass through the round holes in the aluminum alloy outer frame 3012. There are a total of 5 stainless steel tubes, which form the overall frame structure of the composite parabolic concentrator. The electroplated aluminum oxide plates 302 are two rectangular electroplated aluminum oxide thin plates. They have good elasticity and can be attached to both sides of the groove inside the frame 301, serving as a reflective surface to reflect sunlight to the bottom, thereby achieving light concentration. After being attached, the electroplated aluminum oxide plates 302 are fixed to the frame 301 with screws.

[0033] The concentrating photovoltaic module 5 and the photovoltaic heat dissipation channel backplate 6 are roughly the same size and have corresponding mounting holes. The concentrating photovoltaic module 5 can be fixed to the photovoltaic heat dissipation backplate 6 with screws. Both are placed together in the groove of the electroplated alumina plate 302 at the bottom of the composite parabolic concentrator and secured with screws. The concentrating photovoltaic module 5 concentrates sunlight, while the photovoltaic heat dissipation channel backplate 6 controls the temperature of the concentrating photovoltaic module 5.

[0034] The electroplated aluminum oxide plate 302 has a U-shaped structure. A rotating shaft 3021 is provided at the bottom of the electroplated aluminum oxide plate 302. A rotating seat 101 is provided at the upper end of the stainless steel base frame 1. The rotating shaft 3021 is rotatably mounted on the rotating seat 101.

[0035] Table 1 Equipment Component List

[0036]

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A compound parabolic concentrating solar full spectrum utilization device, characterized by: The device comprises a stainless steel base frame (1) and a compound parabolic concentrator (3) arranged on the stainless steel base frame (1) through a direct current push rod (2). The compound parabolic concentrator (3) comprises a frame (301) and an electroplated aluminum oxide plate (302), the frame (301) comprises an aluminum alloy outer frame (3012) and a stainless steel pipe (3011) arranged on the aluminum alloy outer frame (3012), a cross pipe (3013) is arranged on the stainless steel pipe (3011), and the electroplated aluminum oxide plate (302) is fixedly arranged on the side wall of the stainless steel pipe (3011).

2. The compound parabolic concentrator according to claim 1, wherein the electroplated aluminum oxide plate (302) is in a U-shaped structure, the bottom of the electroplated aluminum oxide plate (302) is provided with a rotating shaft (3021), and the upper end of the stainless steel base frame (1) is provided with a rotating seat (101), and the rotating shaft (3021) is rotatably arranged on the rotating seat (101).

3. The compound parabolic concentrator according to claim 1, wherein the inner bottom of the electroplated aluminum oxide plate (302) is provided with a light-concentrating photovoltaic module (5) and a photovoltaic heat dissipation back plate (6) arranged in sequence from top to bottom. ​ ​

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