CN211716901U - Long-service-life spectrum light splitting and light condensing integrated photovoltaic thermal module and control system thereof - Google Patents

Abstract

High life spectrum beam split, spotlight integral type photovoltaic hot module, including spotlight ware, evacuated collector tube, beam split rete, the photovoltaic cell that compound parabolic glass structure of crossing constitutes, characterized in that: the condenser, the light splitting film layer and the photovoltaic cell form an integral photovoltaic-light splitting-light condensing integrated component; the light splitting film layer and the photovoltaic cell are attached to the condenser; the vacuum heat collecting tube is arranged on a surface equation of the crossed compound paraboloid. The solar photovoltaic and photothermal comprehensive utilization system can further improve the solar energy utilization efficiency; the light splitting film layer absorbs energy of an ultraviolet part which damages the photovoltaic cell panel in sunlight, and absorbs solar radiation of an ultraviolet part and a reflection infrared part; the heat dissipation of the surface of the photovoltaic cell is reduced, and the operation temperature of the cell is reduced, so that the service life of the photovoltaic cell panel is prolonged; the adopted crossed compound parabolic glass condenser ensures that the sunlight receiving angle is large, and the intercepting efficiency of the incident sunlight is improved.

Description

Long-service-life spectrum light splitting and light condensing integrated photovoltaic thermal module and control system thereof

Technical Field

The utility model relates to a solar energy application technology field, specific theory, the invention relates to a high life spectrum beam split, spotlight integral type photovoltaic thermal module and control system thereof.

Background

The development and application of solar energy resources have important significance to national sustainable development strategy. The solar photovoltaic power generation has the advantages of short construction period, modularized installation, easiness in construction according to the load size and the like, and has very important research value and wide application prospect. It is expected that by 2030, photovoltaic power generation will account for 5% -20% of the world's total power generation.

In the 70's of the 20 th century, Kern in Kern, E.C. and Russell, M.C, (1978) composite Photovoltaic and thermal hybrid semiconductor systems of the 13th IEEE polymeric specialities, Washington DC, June 1978,1153 and 1157, the main concept of PV/T systems using water or air as the heat-carrying medium was first proposed. PV/T is a big trend in the field of solar energy utilization, combining photovoltaic and photothermal technologies, significantly improving the solar energy utilization of the whole system. In addition to the demand for electricity and domestic hot water or air in daily life, the demand for heating, cooling and dehumidification of buildings all require higher quality heat sources, and PV/T technology can solve these problems to some extent. Therefore, the solar PV/T technology has good development and application prospects.

At present, most of photovoltaic power plants adopt polysilicon photovoltaic power generation. On one hand, the polycrystalline silicon photovoltaic cell is easily influenced by the ultraviolet part irradiated by the sun and the temperature of the photovoltaic cell, so that the service life of the cell is shortened, and even the damage is caused. On the other hand, the near infrared part of the solar energy (in the range of 1000-. If this energy can be concentrated and converted into heat energy in the form of light and heat utilization, the efficiency and economy of the system can be greatly improved. Therefore, a better design concept is needed to prolong the life cycle of the photovoltaic panel and improve the utilization rate of solar energy.

Other prior art includes several examples of photovoltaic photothermal such as:

the foreign literature Tiong-Keat Yew, Kok-Keong Chong, Boon-Han Lim, Performance student crosslinked composite inorganic photovoltaic semiconductor in non-organic imaging center for the application of cooling liquid to the optimum working temperature in Solar Energy 120 (2015296) 309 was analyzed to show that the temperature of the cell has a significant effect on the power generation efficiency in the CPVT system. If the waste heat can be utilized to simultaneously utilize the light and the heat and the photovoltaic, the system efficiency is obviously improved.

Patent No. CN201983472U discloses a compound parabolic concentrator applied only in a single photothermal system. In the technology, only the near infrared part of solar energy is utilized for photothermal conversion, so the solar energy utilization rate is far lower than that of the system, and a larger loss can be expected.

In existing dense array CPV systems, there are no systems widely used or fully developed to improve the overall performance of the CPV concentrator. The most common secondary optic applications are limited to single cell CPV modules coupled to fresnel lenses and acting as primary concentrators, but are not as effective in concentrating sunlight uniformity as the present invention.

Patent No. CN102589159 discloses a photovoltaic and photothermal integrated system. The solar collector adopts a surface type of a compound paraboloid, a solar panel is laid in the middle of the condenser, the solar panel is arranged in the vacuum heat collecting tube, and a cooling tube is laid at the bottom of the solar panel. This design enables simultaneous photovoltaic and thermal utilization, but it does not separate the ultraviolet rays and does not extend the life cycle of the panels as in our system. In the design, the design that the cooling pipe is arranged in the vacuum heat collecting pipe cannot ensure that the battery plates on two sides of the cooling pipe are effectively cooled when the heat collecting temperature is higher. In the system, when sunlight is hit down from the upper side, the interference film directly absorbs ultraviolet rays, reflects infrared rays to the vacuum heat collecting pipe, and simultaneously hits a photovoltaic cell panel below through visible light for power generation, so that a lot of structures and cost are saved, and the service life of the cell panel is prolonged.

Patent No. CN101937934 discloses a solar cell based on secondary reflection light concentration. It adopts a secondary paraboloid reflector, and the bottom of the reflector is provided with an opening, so that light can be irradiated on the light-splitting device and the photosensitive battery pack below. The parabolic solar condenser is opposite to the reflecting surface of the secondary parabolic reflector, and the parabolic solar condenser and the secondary parabolic reflector are coaxial and confocal. When sunlight is emitted from the upper part of the reflector, the light is reflected to the parabolic solar condenser through the secondary paraboloid and passes through the hole to be emitted to the light splitting device to realize light splitting, and the split light is refracted to the narrow-band photosensitive battery pack with the corresponding band by the light splitting prism according to the wavelength. In this technique, the heat resistance requirements for the components below, particularly the photosensitive cell stack, are increased, and the increase in temperature will significantly reduce the power generation efficiency of the cell stack, thereby reducing the overall utilization of solar energy by the system. The ultraviolet part will also lose the lifetime of the panel; because each band light in the design must accurately irradiate each corresponding photosensitive cell panel, the irradiation precision of the system must be improved, namely a tracking system must be arranged to enable the incident angle to meet the requirement, the cost is high, and the reliability is low. In the design of the solar cell panel, the light splitting film absorbs ultraviolet rays and reflects near infrared rays for heat collection, so that the service life of the solar cell panel is prolonged, heat is effectively utilized, and the solar cell panel is not irradiated on the solar cell panel to influence the power generation efficiency. Meanwhile, the design has very excellent power generation and heat collection efficiency within 0-40 degrees, a tracking system is not needed, and the cost is reduced and the reliability is improved.

Patent No. CN 106208950 a discloses a dish-type reflective concentrating photovoltaic power generation system beneficial to crop growth. The large-area disc-type parabolic condenser is made of transparent materials, an optical light splitting film is arranged on a reflecting surface of the large-area disc-type parabolic condenser, sunlight projected to the large-area disc-type parabolic condenser is divided into two beams according to the wavelength range by the optical light splitting film, one part of the sunlight is transmitted and shines on plants through the large-area disc-type parabolic condenser, and the other part of the sunlight is reflected and converged to form light spots which are received by a solar power generation device. Compared with the light splitting mode, the invention not only reduces the power generation efficiency of solar energy, but also does not well utilize the invisible light part. In contrast, our invention makes good use of the visible portion for power generation while also making effective use of the invisible portion for heat generation, in addition to which our dichroic coating absorbs uv light to reduce uv damage to the silicon cell.

Patent No. CN109899759 discloses a solar indoor lighting system. The solar energy light gathering module comprises a light gathering device, a beam splitter, a light guide plate, an optical coupling template and an optical fiber, and the light gathering device is a double-paraboloid light gathering device array. The sunlight is condensed by the solar condenser and then is separated into visible light and invisible light by the beam splitter, the invisible light is used for solar power generation, the visible light is used for indoor illumination by control, the photovoltaic efficiency of the invisible light power generation solar energy is too low, the thermal effect is large, no cooling measure is adopted, and the service life and the efficiency of the solar panel of the solar power generation system are lower compared with those of the system. And because this design does not separate the ultraviolet ray, just can not get the life cycle extension like the panel in our system yet, this design is applicable to indoor lighting moreover, and the photovoltaic of our system and heat energy application are comparatively nimble.

SUMMERY OF THE UTILITY MODEL

In order to solve the deficiencies in the prior art, the utility model provides a high life spectrum beam split, spotlight integral type photovoltaic thermal module and control system thereof, the invention utilizes photovoltaic cell to only utilize the characteristic and the solar spectrum separation principle of partial wave band solar energy, will separate or absorb the harmful ultraviolet light of photovoltaic cell, is used for photovoltaic cell and light heat device conversion respectively with visible light part and near-infrared part. The service life of the photovoltaic cell panel can be prolonged, high power generation efficiency and heat generation efficiency can be guaranteed, and the total solar energy utilization rate reaches over 90%.

The specific technical scheme is as follows:

high life spectrum beam split, spotlight integral type photovoltaic hot module, including spotlight ware, evacuated collector tube, beam split rete, the photovoltaic cell that compound parabolic glass structure of crossing constitutes, characterized in that: the condenser, the light splitting film layer and the photovoltaic cell form an integral photovoltaic-light splitting-light condensing integrated component; the lower surface of the light splitting film condenser; the photovoltaic cell is clamped below the light splitting film layer by an EVA (ethylene vinyl acetate) adhesive layer; the vacuum heat collecting tube is arranged at the focus position of the crossed compound paraboloid, is supported by the bracket on the condenser and is not in direct contact with the condenser.

Preferably: the crossed composite parabolic glass structure is composed of mirror-symmetrical curved glass, and the curved glass is in a shape that two sections of involute surfaces are smoothly connected at an interface. The relative position of the vacuum heat collecting tube and the cross compound parabolic glass structure is not changed in the operation process.

Preferably: the lower surface of the crossed composite parabolic glass structure is covered with a light splitting film layer, and the lower surface of the light splitting film layer is covered with a photovoltaic cell panel clamped by EVA (ethylene vinyl acetate) adhesive layers.

Preferably: the photovoltaic cell is a silicon crystal cell or a thin film cell and is arranged on the lower surface of the light splitting film layer in a clamping mode through an EVA (ethylene vinyl acetate) glue layer.

Preferably: the light splitting film layer is a multilayer dielectric interference-absorption film, reflects solar radiation of infrared spectrum, absorbs solar radiation of ultraviolet spectrum and transmits visible spectrum.

Preferably: the vacuum heat collecting pipe comprises an inner layer and an outer layer, wherein the outer layer is a glass pipe, the inner layer is a glass pipe or a metal pipe, the outer surface of the inner layer is plated with a selective coating for absorbing near-infrared radiation, the radiation is converted into heat energy, the inner layer and the outer layer are vacuumized, and a heat transfer liquid working medium flows in the inner pipe to absorb the heat.

Preferably: the adjustable light concentrator is convenient to disassemble and can correspondingly adjust the rotation angle according to the real-time condition.

The utility model discloses still disclose a high life spectrum beam split, spotlight integral type photovoltaic thermal module control system, including above-mentioned high life spectrum beam split, spotlight integral type photovoltaic thermal module, characterized in that: the system comprises a monomer light-following type, wherein the monomer light-splitting type is as follows: the solar vacuum heat collecting tube is positioned in the middle of a crossed compound parabolic glass structure, and the focal position of a parabolic surface; the solar photovoltaic solar collector is characterized in that a condenser with a crossed compound parabolic glass structure is arranged below the vacuum heat collecting tube, the inner surface of the condenser with the crossed compound parabolic glass structure is baked and attached by a light splitting film layer, a photovoltaic cell is attached to the outer layer of the condenser with the crossed compound parabolic glass structure, sunlight absorbs ultraviolet rays under the light splitting effect of the light splitting film layer, infrared rays are reflected and then gathered on the vacuum heat collecting tube, visible light is partially transmitted, and the visible light is converted into electric energy at the photovoltaic cell.

Preferably: the system also comprises a group array, and the specific structure of the group array is as follows: the solar vacuum heat collecting tube comprises a plurality of spectrum splitting type photovoltaic thermal module units, wherein the vacuum heat collecting tube comprises a water supply channel, a water outlet channel, a photovoltaic cell panel merging circuit, a water supply tank, a water supply pump and a warm water tank; the solar water heater is characterized in that a water supply channel is arranged at the water inlet of the heat collecting pipe, a water outlet channel is arranged at the water outlet of the heat collecting pipe, the photovoltaic cell panel is integrated into a circuit, a water supply tank is arranged at the inlet of the water supply channel and is provided with a water supply pump, and a water outlet pipeline is provided with a warm water tank; when the solar water heater runs, the water feeding pump pumps normal-temperature water from the water feeding tank into the water feeding channel, the normal-temperature water flows in from the inlet of the vacuum heat collecting tube, infrared rays in sunlight are subjected to light splitting, refraction and condensation and then irradiate on the vacuum heat collecting tube to heat water, and hot water flows into the warm water tank from the outlet of the vacuum heat collecting tube.

Has the advantages that:

(1) the light splitting film on the surface of the crossed composite parabolic glass structure approximately separates sunlight according to the receiving spectrum of the photovoltaic cell

The solar energy is visible light, near infrared light and ultraviolet light, and the three parts are separately utilized, so that the total utilization rate of the solar energy is greatly improved. The measurement and calculation results based on the monocrystalline silicon battery show that the following conclusion can be obtained from the efficiency comparison table of the system and the traditional photovoltaic and photothermal system as follows: the total efficiency of the system can reach 87.3 percent, wherein the electric efficiency is 17.4 percent, and the thermal efficiency is 76.9 percent.

(2) The light splitting film on the surface of the crossed compound paraboloid reflects the near infrared part in the sunlight to be focused on the vacuum heat collecting tube to realize heat focusing for heating liquid, and due to the improvement of the light focusing ratio, the temperature range of the heat source provided by the module is greatly higher than that of a common vacuum heat collecting tube or a flat plate heat collector, and the module can be used for providing a domestic and industrial heat source with the temperature of 70-200 ℃ and is used for textile, tobacco drying, seawater desalination, building and regional heating and the like.

(3) Solar radiation (mostly in the visible light spectrum band) transmitted through the light splitting film layer and the glass directly enters the photovoltaic cell below the light splitting film layer for photoelectric conversion. The spectral band is overlapped with the spectral band with higher external quantum efficiency of the photovoltaic cell through the design and selection of the film layer. Therefore, the power generation amount of the photovoltaic cell is not affected basically, the module realizes the reflection of near infrared light through the light splitting film, and the surface temperature of the photovoltaic cell is reduced, so that the power generation efficiency of the photovoltaic cell is improved.

(4) Because the light splitting film realizes the absorption of ultraviolet light, the photovoltaic cell in the module can effectively avoid the aging and the damage of the ultraviolet light to cell materials, and the service life cycle of the photovoltaic cell is prolonged, thereby increasing the economical efficiency of the system.

(5) The crossed compound parabolic glass structure, the photovoltaic cell and the light splitting film form an integrated component together, so that the production and installation are convenient, the crossed compound parabolic glass structure simultaneously plays a role of a light condenser, and a good light condensing effect can be provided under the condition of fixed installation (non-tracking type).

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the limiting function of the involute curve of the present invention.

Fig. 3 is a schematic diagram of the wavelength bands and all the wavelength bands of the visible light utilized by the present invention.

FIG. 4 shows the spectral transmittance of the spectroscopic film used in the present invention and the theoretical spectral utilization range in the literature.

Fig. 5 is a schematic view of the structure of the present invention.

Fig. 6 is the schematic view of the inside of the structure-represented vacuum heat collecting tube of the present invention.

Fig. 7 is a front view of the group array of the present invention.

Fig. 8 is a top view of the group array of the present invention.

Wherein: 1. a condenser of a cross compound parabolic glass structure; 2. a light splitting film layer; 3. a photovoltaic cell; 4. a vacuum heat collecting tube; 5. a water supply channel of the vacuum heat collecting pipe; 6. a water outlet channel of the vacuum heat collecting pipe; 7. the photovoltaic cell panel is incorporated into the circuit; 8. a water supply tank; 9. a warm water tank; 10, EVA glue film; 11. a back film.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

High life spectrum beam split, spotlight integral type photovoltaic hot module includes spotlight ware, evacuated collector tube, beam split rete, the photovoltaic cell that compound parabolic glass structure of crossing constitutes, characterized in that: the condenser, the light splitting film layer and the photovoltaic cell form an integral photovoltaic-light splitting-light condensing integrated component; the light splitting film layer and the photovoltaic cell are attached to the condenser; the vacuum heat collecting tube is arranged at the focus position determined by the surface equation of the crossed compound paraboloid, and the relative position of the vacuum heat collecting tube and the glass structure of the crossed compound paraboloid does not change in the operation process; the cross composite parabolic glass structure consists of mirror-symmetrical curved glass, and the cross section of the curved glass is a combination of two sections of involutes; the cross composite parabolic structure is sequentially provided with glass, a light splitting film, a photovoltaic cell, an EVA (ethylene vinyl acetate) adhesive film and a back film from the inner side to the outer side; the photovoltaic cell is a crystalline silicon cell or a thin film cell and is directly arranged on the lower surface of the light splitting film, the photovoltaic cell is clamped by an EVA (ethylene vinyl acetate) adhesive film, and a back film is attached behind the EVA adhesive film; the light splitting film layer is a multilayer dielectric interference-absorption film, reflects solar radiation of infrared spectrum, absorbs solar radiation of ultraviolet spectrum and transmits solar spectrum of visible spectrum; the vacuum heat collecting pipe comprises an inner layer and an outer layer, wherein the outer layer is a glass pipe, the inner layer is a glass pipe or a metal pipe, the outer surface of the inner layer is plated with a selective coating for absorbing near infrared radiation, the radiation is converted into heat energy, the space between the inner layer and the outer layer is vacuumized, and a heat transfer liquid working medium flows in the inner pipe to absorb the heat energy; the adjustable light collector also comprises an adjustable bracket used for installing a light collector formed by a crossed compound parabolic glass structure. The support is convenient to detach, and can correspondingly adjust the rotating angle according to the real-time condition. The support enables the condenser to be mounted on a fixed surface to operate, or a single-axis tracking system and a double-axis tracking system are adopted to enable the condenser to operate.

The concentrator design principle of the cross compound parabolic glass structure is described in detail below:

the condenser with the crossed composite parabolic glass structure consists of mirror-symmetrical curved glass, and the curved glass is a combination of two sections of involutes.

Referring to fig. 2(a), (b), the distance ρ (θ) from the evacuated collector tube to the curve along the tangential direction can be divided into the following two parts: an involute section and a reflective section. For theInvolute region theta_m≤|θ|≤θ_A+ π/2, let ρ (θ) be

From FIG. 2(b), for θ_A+π/2≤θ≤3π/2-θ_ARegion, ρ (θ) can be expressed as

With points T, A and a' on the same line. Substituting ρ (θ) into the position of P (X, Y):

X＝rsinθ-ρ(θ)cosθ

y＝-rcosθ-ρ(θ)sinθ

wherein: p is a point on a curve, T is a tangent point on a circle, O is the center of the vacuum heat collecting tube, P_mThe point being located at the reflector tip, T_mIs P_mCorresponding tangential point, then theta is OP_mAngle to OT, P and P_mThe minimum value of theta at the time of coincidence is theta_m，θ_AIs the half acceptance angle of light, r is the radius of the vacuum tube collector, l_GIs the gap between the bottom of the evacuated tube collector and the tip of the reflector. The sunlight receiving angle is large, the intercepting efficiency of the incident sunlight is improved, and the condenser can keep higher light heat efficiency in the most suitable working time period in a non-tracking system.

In addition, the gap between the vacuum tube heat collector and the tip of the crossed compound paraboloid cannot be avoided, some incident rays cannot be absorbed due to the gap, and the smaller the gap is, the less the gap loss is, the structure can ensure that the sunlight receiving angle is large, and the intercepting efficiency of the incident sunlight is improved. The cross compound parabolic structure comprises glass 1, a light splitting film 2, a crystalline silicon cell piece 3, an EVA (ethylene vinyl acetate) adhesive film 10 and a back film 11 in sequence from the inner side to the outer side, as shown in figure 5.

The light splitting film layer is directly attached or coated on the lower side of the crossed composite parabolic glass structure. The light splitting film is a multilayer medium interference-absorption film, reflects solar radiation of infrared spectrum and absorbs solar radiation of ultraviolet spectrum. The system adopts a multilayer medium interference-absorption film which is prepared by a metal sputtering multilayer medium coating process, multiple layers of rare metals such as indium oxide, gold, silver and the like with extremely small thickness are sputtered on a durable polyester film to form the spectroscopic film, and the spectral transmittance and the theoretical spectral utilization range in the literature of the spectroscopic film are shown in figure 4.

The photovoltaic cell can be selected from a thin film cell or a crystalline silicon cell, an amorphous silicon cell and the like, is arranged below the multilayer structure, is attached below the glass-light splitting film structure through a photovoltaic cell packaging adhesive film, and is connected in series and parallel to form a photovoltaic cell module.

Example 1

Monomer formula of following spot:

the vacuum heat collecting tube is positioned in the middle of the crossed composite paraboloidal glass structure and at the position of a paraboloidal focal point. The relative position of the cross compound parabolic glass structure is not changed in the operation process. For near infrared energy collection via reflective collection. The vacuum heat collecting pipe consists of inner and outer layers, the outer layer is glass pipe, the inner layer is glass pipe or metal pipe, the outer surface of the inner layer is coated with selective coating for absorbing near infrared radiation to convert the radiation into heat energy, the space between the inner and outer layers is vacuum pumped, and the inner pipe has heat transferring liquid working medium flowing to absorb heat.

Referring to fig. 1, 5 and 6, when the spectrum light-splitting photovoltaic thermal system is used alone, the spectrum light-splitting photovoltaic thermal system comprises a heat collecting tube 4, a cross compound parabolic glass structure 1 is arranged below a heat conducting tube, the inner surface of the cross compound parabolic glass structure light collector 1 is baked and attached by a light-splitting film 2, the light-splitting film 2 is attached to the cross compound parabolic glass structure 1, a photovoltaic cell 3 is attached to the outer layer of the cross compound parabolic glass structure light collector 1, sunlight absorbs ultraviolet rays through the light-splitting effect of the light-splitting film 2, infrared rays are reflected and then are collected on the heat collecting tube 6, visible light is partially transmitted and converted into electric energy at the photovoltaic cell 3, the total utilization rate of solar energy is remarkably improved, and the service life of the photovoltaic photo-thermal. Data are collected by sensing the heat on the surface of the cross compound parabolic glass structure 1, the data collector is connected with a computer, the state of the cross compound parabolic glass structure condenser is monitored in real time, when the heat on the surface of one side is too low and most of the heat is concentrated on the other side, the angle of the acceptance angle of the cross compound parabolic glass structure condenser is adjusted by connecting the computer with the cross compound parabolic glass structure condenser support, and the heat is balanced again on the two sides. And the data are monitored in real time and continuously adjusted through data reflection in a circulating reciprocating mode.

Example 2

Group array:

referring to fig. 7, when the spectrum spectroscopic photovoltaic thermal system is used in an array form, each unit comprises a cross compound parabolic glass structure 1, a spectroscopic film 2 is attached to the lower surface of each unit, so that ultraviolet rays in sunlight irradiated to the surface of the spectroscopic film 2 are absorbed, visible light is transmitted, a near-infrared part is reflected, a crystalline silicon solar panel 3 is attached to the lower surface of each unit, and the transmitted visible light is received for power generation. A vacuum heat collecting tube 6 is arranged at a specific focus position determined by a cross compound paraboloid surface equation, and absorbs reflected and gathered infrared light to generate heat.

Referring to fig. 8, when the system array is used, the water inlet of the heat collecting tube is provided with a water supply channel 5, the water outlet is provided with a water outlet channel 6 and is provided with a temperature sensing device, the water temperature of the water outlet can be transmitted to a computer in real time, the photovoltaic cell panel is incorporated into a circuit 7, the water supply channel inlet is provided with a water supply tank 8 and is provided with a water supply pump, the water pump is controlled by the computer, and the water outlet pipeline is provided with a warm water tank 9. When the water temperature of the water outlet channel is too high, the water feed pump is controlled by a computer to pump normal-temperature water into the water feed channel 5 from the water feed tank 8, the normal-temperature water flows in from the inlet of the vacuum heat collecting tube 6 and is discharged into the warm water tank, when the water temperature of the water outlet is too low, the water feed pump is controlled by the computer to be closed, and infrared rays in sunlight irradiate the vacuum heat collecting tube 6 after being subjected to light splitting, refraction and condensation to heat the normal-temperature water.

The utility model discloses relative prior art has following advantage:

the solar energy utilization efficiency is improved through photovoltaic and photothermal comprehensive utilization; the light splitting film layer absorbs the energy of an ultraviolet part which causes damage to the photovoltaic cell panel in sunlight, and reduces the heat dissipation of the surface of the photovoltaic cell and the operation temperature of the cell on the basis of basically keeping the efficiency of the photovoltaic cell by absorbing the solar radiation of the ultraviolet part and the infrared part, thereby prolonging the service life of the photovoltaic cell panel; the crossed compound parabolic glass condenser adopts the surface equation, so that the sunlight receiving angle is large, the intercepting efficiency of the incident sunlight is improved, the condenser can keep higher light heat efficiency in the most suitable working time period in a non-tracking system, and light spots on the heat collector are uniform under most incident angles. The solar energy irradiated by different spectrums is reflected, absorbed and transmitted through the light splitting film, so that the split spectrum utilization of the solar energy is realized, the photovoltaic cell only receives convertible solar irradiation, the problem of aging and damage of the photovoltaic cell caused by ultraviolet irradiation is avoided, and the extra heat load caused by near-infrared irradiation is reduced, thereby reducing the temperature of the photovoltaic cell, improving the photovoltaic conversion efficiency and prolonging the service life of the cell.

The invention discloses a spectrum splitting type long-service-life photovoltaic thermal module based on a crossed compound parabolic condenser, and belongs to the technical field of solar energy utilization. The spectrum light-splitting type high-service-life photovoltaic thermal module realizes spectrum light splitting through the crossed composite parabolic glass directly covered with the light-splitting film layer, transmits visible light for photovoltaic power generation, reflects and collects solar radiation of an infrared part to the vacuum heat collecting pipe to realize heat collection, and absorbs an ultraviolet part so as to prolong the service life of a photovoltaic cell. The module comprises crossed compound parabolic glass, a vacuum heat collecting tube, a light splitting film and a photovoltaic cell assembly. Wherein the vacuum heat collecting tube and the crossed compound parabolic glass are supported by an adjustable bracket, and the cylindrical vacuum heat collecting tube is positioned in the middle of the crossed compound parabolic glass; the solar cell panel is tightly attached to the outer side of the crossed compound parabolic glass, and the light splitting film is tightly attached to the inner side of the crossed compound parabolic glass, so that a photovoltaic-light splitting-light condensing integrated component is formed. Solar spectrums in different ranges are respectively absorbed by the photovoltaic cell and the heat absorber of the vacuum heat collecting tube through the light splitting film. According to the technical scheme for the solar energy spectral utilization, the solar energy utilization efficiency can be further improved through photovoltaic and photothermal comprehensive utilization; the light splitting film layer absorbs the energy of an ultraviolet part which causes damage to the photovoltaic cell panel in sunlight, and reduces the heat dissipation of the surface of the photovoltaic cell and the operation temperature of the cell on the basis of basically keeping the efficiency of the photovoltaic cell by absorbing the solar radiation of the ultraviolet part and reflecting the infrared part, thereby prolonging the service life of the photovoltaic cell panel; the adopted crossed compound parabolic glass condenser ensures that the sunlight receiving angle is large, and the intercepting efficiency of the incident sunlight is improved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. High life spectrum beam split, spotlight integral type photovoltaic hot module, including spotlight ware, evacuated collector tube, beam split rete, the photovoltaic cell that compound parabolic glass structure of crossing constitutes, characterized in that: the condenser, the light splitting film layer and the photovoltaic cell form an integral photovoltaic-light splitting-light condensing integrated component; the lower surface of the light splitting film condenser; the photovoltaic cell is clamped below the light splitting film layer by an EVA (ethylene vinyl acetate) adhesive layer; the vacuum heat collecting tube is arranged at the focus position of the crossed compound paraboloid, is supported by the bracket on the condenser and is not in direct contact with the condenser.

2. The long-life spectral light splitting and light concentrating integrated photovoltaic thermal module according to claim 1, characterized in that: the crossed composite parabolic glass structure consists of mirror-symmetrical curved glass, and the curved glass has a curved shape that two sections of involute surfaces are smoothly connected at an interface; the relative position of the vacuum heat collecting tube and the cross compound parabolic glass structure is not changed in the operation process.

3. The long-life spectral light splitting and light concentrating integrated photovoltaic thermal module according to claim 1, characterized in that: the lower surface of the crossed composite parabolic glass structure is covered with a light splitting film layer, and the lower surface of the light splitting film layer is covered with a photovoltaic cell panel clamped by EVA (ethylene vinyl acetate) adhesive layers.

4. The long-life spectral light splitting and light concentrating integrated photovoltaic thermal module according to claim 1, characterized in that: the photovoltaic cell is a silicon crystal cell or a thin film cell and is arranged on the lower surface of the light splitting film layer in a clamping mode through an EVA (ethylene vinyl acetate) glue layer.

5. The long-life spectral light splitting and light concentrating integrated photovoltaic thermal module according to claim 1, characterized in that: the light splitting film layer is a multilayer dielectric interference-absorption film, reflects solar radiation of infrared spectrum, absorbs solar radiation of ultraviolet spectrum and transmits visible spectrum.

6. The long-life spectral light splitting and light concentrating integrated photovoltaic thermal module according to claim 1, characterized in that: the vacuum heat collecting pipe comprises an inner layer and an outer layer, wherein the outer layer is a glass pipe, the inner layer is a glass pipe or a metal pipe, the outer surface of the inner layer is plated with a selective coating for absorbing near-infrared radiation, the radiation is converted into heat energy, the inner layer and the outer layer are vacuumized, and a heat transfer liquid working medium flows in the inner pipe to absorb the heat.

7. The long-life spectral light splitting and light concentrating integrated photovoltaic thermal module according to claim 1, characterized in that: the adjustable light concentrator is convenient to disassemble and can correspondingly adjust the rotation angle according to the real-time condition.

8. High life spectrum beam split, spotlight integral type photovoltaic thermal module control system, including the high life spectrum beam split, spotlight integral type photovoltaic thermal module of claim 1, characterized by: the system comprises a monomer light-following type, wherein the monomer light-splitting type is as follows: the solar vacuum heat collecting tube is positioned in the middle of a crossed compound parabolic glass structure, and the focal position of a parabolic surface; the solar photovoltaic solar collector is characterized in that a condenser with a crossed compound parabolic glass structure is arranged below the vacuum heat collecting tube, the inner surface of the condenser with the crossed compound parabolic glass structure is baked and attached by a light splitting film layer, a photovoltaic cell is attached to the outer layer of the condenser with the crossed compound parabolic glass structure, sunlight absorbs ultraviolet rays under the light splitting effect of the light splitting film layer, infrared rays are reflected and then gathered on the vacuum heat collecting tube, visible light is partially transmitted, and the visible light is converted into electric energy at the photovoltaic cell.

9. The long-life spectral light splitting and light concentrating integrated photovoltaic thermal module control system according to claim 8, characterized in that: the system also comprises a group array, and the specific structure of the group array is as follows: the solar vacuum heat collecting tube comprises a plurality of spectrum splitting type photovoltaic thermal module units, wherein the vacuum heat collecting tube comprises a water supply channel, a water outlet channel, a photovoltaic cell panel merging circuit, a water supply tank, a water supply pump and a warm water tank; the solar water heater is characterized in that a water supply channel is arranged at the water inlet of the heat collecting pipe, a water outlet channel is arranged at the water outlet of the heat collecting pipe, the photovoltaic cell panel is integrated into a circuit, a water supply tank is arranged at the inlet of the water supply channel and is provided with a water supply pump, and a water outlet pipeline is provided with a warm water tank; when the solar water heater runs, the water feeding pump pumps normal-temperature water from the water feeding tank into the water feeding channel, the normal-temperature water flows in from the inlet of the vacuum heat collecting tube, infrared rays in sunlight are subjected to light splitting, refraction and condensation and then irradiate on the vacuum heat collecting tube to heat water, and hot water flows into the warm water tank from the outlet of the vacuum heat collecting tube.

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