CN111802141A - Heat pipe-PV/T integrated sun shading device - Google Patents
Heat pipe-PV/T integrated sun shading device Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/22—Shades or blinds for greenhouses, or the like
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/243—Collecting solar energy
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/245—Conduits for heating by means of liquids, e.g. used as frame members or for soil heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/90—Solar heat collectors using working fluids using internal thermosiphonic circulation
- F24S10/95—Solar heat collectors using working fluids using internal thermosiphonic circulation having evaporator sections and condenser sections, e.g. heat pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/20—Arrangements for controlling solar heat collectors for tracking
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
- H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping
Abstract
The heat pipe-PV/T integrated sun-shading device applies a heat pipe technology on the basis of PV/T, and improves the heat collection efficiency and the power generation output of the PV/T sun-shading device through the phase change of working media in the pipe. The device is applied to the greenhouse and mainly comprises a PV/T assembly, a heat pipe, a storage battery, a controller, an inverter, an alternating current load, a direct current load, a temperature sensor, a U-shaped groove, a connecting rod frame, a supporting rod, a sleeve rod, a screw rod sleeve, a connecting rod, a screw rod, a supporting rod and the like. The temperature in the greenhouse is observed through the temperature sensor, the screw sleeve is loosened and screwed, so that the sun shading angle of the PV/T assembly is changed up and down, meanwhile, the rod frame can be rotatably connected to realize that the sun shading device tracks the sunlight, and the effects of heat collection and power generation are realized while the interior of the greenhouse is shaded. The phenomenon of crop growth stagnation and even withering caused by overhigh indoor temperature is improved, so that a suitable indoor environment is created for crop growth, and the quality and the yield of crops are improved.
Description
Technical Field
The invention relates to the technical field of greenhouse sunshade, in particular to a heat pipe-PV/T integrated sunshade technology.
Background
Domestic research shows that when the greenhouse film is closed in a sunny day in summer, the temperature in the greenhouse is higher than that outside the greenhouse by more than 20 ℃ and even can reach 30 ℃. In winter, the temperature in the greenhouse can reach more than 40 ℃ within one hour. The foreign scholars Castellano S finds that in high radiation areas in summer, greenhouses are usually exposed to crop withering and even death caused by excessive temperature rise. The transient or continuous high temperature causes the morphological and anatomical and physiological changes of the plants, which affect the growth and development of the plants and possibly cause the drastic reduction of the economic yield, and the temperature, the humidity and the illumination intensity in the greenhouse can be effectively adjusted through reasonable sun shading. Liuchun incense states that temperature and humidity may be one of the reasons for "noon break" in crops. The sun-shading reduces illumination and relieves high-temperature hazard to a certain extent. Except that, the greenhouseInternal CO2The concentration fluctuates with respiration and photosynthesis of the greenhouse crop. With the photosynthesis of plants in the daytime and the ventilation of the greenhouse being limited, CO in the greenhouse2The concentration tends to drop to a lower level than the outside. Cossu M states that the sun shade most affects solar radiation in the fall (71% on average), followed by the winter (69%), spring (66%) and summer (60%). Research by scholars in China, Wu Xuejiexia and the like finds that the illumination intensity has direct influence on the photosynthesis capability and the disease and insect resistance capability of crops in a greenhouse. Therefore, the control of the change of the illumination intensity in the greenhouse is in an appropriate range, and the improvement of the crop yield and quality is positively promoted.
Traditional sun-shading modes such as sun-shading nets (cloth) and coating reflecting layers are widely applied to remote rural areas in China, and although the modes slow down the environmental temperature in a shed in the daytime to a certain extent, the modes do not realize effective utilization of energy, namely power generation and heat generation. Meanwhile, due to regional characteristics, there are places where there is no power supply. In summer, most farmers only adopt the natural ventilation and sunshade net mode to reduce the temperature in the greenhouse; in winter, the heat dissipation in the greenhouse is slowed down by adding the heat preservation quilt. These measures were clearly somewhat debilitating when in the three-volt day and winter solstice. Partial farmers fix the photovoltaic modules on the surface of the greenhouse to plant yin-loving crops such as mushrooms and effectively convert solar energy into electric energy, but the planting permission of the greenhouse is obviously reduced by the method. The change of the photovoltaic array mode (linear mode and chessboard mode) can effectively improve the illumination distribution in the shed, but the surface temperature of the solar cell panel is increased along with the integral increase of the temperature in the shed, and the power generation efficiency is reduced along with the increase of the temperature. Therefore, the heat pipe-PV/T integrated sun shading device is designed, is applied to a greenhouse for shading sun, effectively reduces the surface temperature of the solar cell panel through the photo-thermal module, improves the power generation efficiency, converts solar energy into heat energy, and realizes effective utilization of energy while shading sun.
The Chinese invention has the patent names: an automatic folding and unfolding device and method for a greenhouse sunshade net are disclosed, and the application numbers are as follows: CN201811292994.3, the invention discloses an automatic folding and unfolding device and method for a greenhouse sunshade net. The automatic operation management of the sunshade net is realized according to the illumination requirements of different crops, and the automatic operation management system has the characteristics of simplicity in operation and the like. However, there are some disadvantages: the sunlight is shielded only by the automatic contraction of the sunshade net, and the solar energy is not effectively utilized to carry out heat utilization or power generation. The Chinese invention has the patent names: the utility model provides a foldable diffusion glass greenhouse photovoltaic of illumination adjustable, application number is: CN201610918523.3, the invention discloses a folding type diffusion glass greenhouse photovoltaic sunshade curtain with adjustable illumination, which comprises a central system and a sunshade curtain device which are arranged in a greenhouse, and has the characteristics of automatically stretching a photovoltaic film sunshade mechanism and finely adjusting the light transmission area of photovoltaic power generation equipment according to the change of the illumination environment in the greenhouse, but the defects exist, firstly, the system is complex, the manufacturing cost is high, and the generation efficiency of the device is seriously influenced as the surface temperature of a photovoltaic cell rises along with the rise of the indoor temperature.
Disclosure of Invention
The invention aims to provide a heat pipe-PV/T integrated sun shading device.
The invention relates to a heat pipe-PV/T integrated sun-shading device.A photo-thermal module of a heat pipe-PV/T component 1 adopts a heat pipe, performs heat exchange by utilizing phase change and convection heat exchange of working media in the pipe, performs circulating heat exchange on low-temperature water through a hose 24 by a circulating pump 23, and stores solar energy into a heat storage water tank 25 in a heat energy mode; the photovoltaic module of the heat pipe-PV/T assembly 1 is connected with an inversion control integrated machine 28, and a voltmeter 26 and an ammeter 27 are installed; the inversion control integrated machine 28 is connected with a load 29 and a storage battery 30, one part of the solar energy is converted into electric energy through the heat pipe-PV/T assembly 1 and is supplied to the load 29, and the other part of the electric energy is stored in the storage battery 30; the first U-shaped groove 2, the second U-shaped groove 3, the third U-shaped groove 4 and the fourth U-shaped groove 5 are connected through a threaded connecting rod 11 and are fixed through a first screw rod 7, a second screw rod 8, a third screw rod 9 and a fourth screw rod 10 in a perforation mode; the threaded connecting rods 11 are connected by screw sleeves 12, and the stroke distance of the threaded connecting rods 11 is changed by loosening and screwing the screw sleeves 12; wherein, the threaded connecting rod 11 can rotate around the rod axis of the lead screw 7; the second U-shaped groove 3 and the third U-shaped groove 4 are connected with a loop bar 6, and the loop bar 6 is nested on the connecting support bar 13 and rotates around the connecting support bar 13; the fixing plate 16 is welded with the support rod 15 and is welded with the sleeve 17 into a whole, wherein the surface of the sleeve 17 is hooped with wires and is inserted through the screw ejector rod 14 so as to fix the overall height of the sun-shading device; the fixing plate 16 is welded on a cross bar between keels at two sides of the greenhouse to bear the whole device; the back of the heat pipe-PV/T component 1 is respectively welded with a first U-shaped groove 2, a second U-shaped groove 3, a third U-shaped groove 4 and a connecting sleeve rod 6, and is fixed through a second screw rod 8 and a third screw rod 9; the fourth U-shaped groove 5 is welded with a connecting rod frame 13, and the first U-shaped groove 2 is connected with the third U-shaped groove 4 through a threaded connecting rod 11 and fixed through a first screw rod 7 and a fourth screw rod 10; a screw sleeve 12 is additionally arranged on the threaded connecting rod 11, and the stroke of the threaded connecting rod is changed by loosening and screwing the screw sleeve 12, so that the sun-shading angle of the heat pipe-PV/T assembly 1 is adjusted; four support rods 15 are welded on a fixed plate 16 and are connected with sleeves 17 through welding, wherein the fixed plate 16 is arranged on a cross rod between keels of the greenhouse and bears the whole sun-shading device; the support rod 18 is welded with the connecting rod frame 13, and the telescopic height of the support rod 18 is clamped through the screw mandril 14; meanwhile, sunlight tracking can be carried out by rotating the connecting rod frame 13, so that the overall power generation and heat collection performance of the device is improved; a part of the generated electric energy is stored through the storage battery 30, and the other part of the generated electric energy can directly provide electric energy for the load 29; in order to ensure the circuit safety, the inversion control integrated machine 28 is connected; the water path part of the sun-shading device is connected through a hose 24, a third valve 21 and a fourth valve 22 are arranged on the hose 24, and a circulating pump 23 is used for circularly exchanging heat for the working medium to heat the heat storage water tank 25.
Compared with the prior art, the invention has the beneficial effects that: 1. the invention can convert solar energy into heat energy and electric energy while shading the greenhouse, thereby realizing effective utilization of energy. 2. According to the invention, the heat pipe is applied to the heat pipe-PV/T assembly (1), so that the surface temperature of the solar cell panel is reduced, and meanwhile, the integral heat collection and power generation performances of the sun shading device are improved by utilizing the phase change and convection heat exchange of the working medium. 3. The invention designs a heat pipe-PV/T integrated sun-shading device, which can realize sun shading of different inclination angles of the device by loosening and screwing a screw sleeve (12). The solar energy tracking is realized by rotating the connecting rod frame (13), and the system performance is further improved. Meanwhile, the current situations of crop yield reduction, slow growth and the like caused by indoor shadow generated by the traditional photovoltaic greenhouse (the photovoltaic plate is fixed on the surface of the greenhouse) are changed. Effectively improves the growth environment of indoor crops and improves the yield and quality of the crops.
Drawings
Fig. 1 is a schematic structural diagram of the present invention, with reference numbers and corresponding names: the heat pipe-PV/T assembly comprises a heat pipe-PV/T assembly 1, a first U-shaped groove 2, a second U-shaped groove 3, a third U-shaped groove 4, a fourth U-shaped groove 5, a loop bar 6, a first screw rod 7, a second screw rod 8, a third screw rod 9, a fourth screw rod 10, a threaded connecting rod 11, a screw sleeve 12, a connecting rod frame 13, a screw ejector rod 14, a supporting rod 15, a fixing plate 16, a sleeve 17, a supporting rod 18, a first valve 19, a second valve 20, a third valve 21, a fourth valve 22, a circulating pump 23, a hose 24, a heat storage water tank 25, a voltmeter 26, an ammeter 27, an inversion control integrated machine 28, a load 29 and a storage battery 30.
Detailed Description
As shown in figure 1, the invention is a heat pipe-PV/T integrated sun shading device, a photo-thermal module of a heat pipe-PV/T assembly 1 adopts a heat pipe, heat exchange is carried out by utilizing phase change and convection heat exchange of working media in the pipe, low-temperature water is subjected to circulating heat exchange through a hose 24 through a circulating pump 23, and solar energy is stored into a heat storage water tank 25 in a heat energy mode; the photovoltaic module of the heat pipe-PV/T assembly 1 is connected with an inversion control integrated machine 28, and a voltmeter 26 and an ammeter 27 are installed; the inversion control integrated machine 28 is connected with a load 29 and a storage battery 30, one part of the solar energy is converted into electric energy through the heat pipe-PV/T assembly 1 and is supplied to the load 29, and the other part of the electric energy is stored in the storage battery 30; the first U-shaped groove 2, the second U-shaped groove 3, the third U-shaped groove 4 and the fourth U-shaped groove 5 are connected through a threaded connecting rod 11 and are fixed through a first screw rod 7, a second screw rod 8, a third screw rod 9 and a fourth screw rod 10 in a perforation mode; the threaded connecting rods 11 are connected by screw sleeves 12, and the stroke distance of the threaded connecting rods 11 is changed by loosening and screwing the screw sleeves 12; wherein, the threaded connecting rod 11 can rotate around the rod axis of the lead screw 7; the second U-shaped groove 3 and the third U-shaped groove 4 are connected with a loop bar 6, and the loop bar 6 is nested on the connecting support bar 13 and rotates around the connecting support bar 13; the fixing plate 16 is welded with the support rod 15 and is welded with the sleeve 17 into a whole, wherein the surface of the sleeve 17 is hooped with wires and is inserted through the screw ejector rod 14 so as to fix the overall height of the sun-shading device; the fixing plate 16 is welded on a cross bar between keels at two sides of the greenhouse to bear the whole device; the back of the heat pipe-PV/T component 1 is respectively welded with a first U-shaped groove 2, a second U-shaped groove 3, a third U-shaped groove 4 and a connecting sleeve rod 6, and is fixed through a second screw rod 8 and a third screw rod 9; the fourth U-shaped groove 5 is welded with a connecting rod frame 13, and the first U-shaped groove 2 is connected with the third U-shaped groove 4 through a threaded connecting rod 11 and fixed through a first screw rod 7 and a fourth screw rod 10; a screw sleeve 12 is additionally arranged on the threaded connecting rod 11, and the stroke of the threaded connecting rod is changed by loosening and screwing the screw sleeve 12, so that the sun-shading angle of the heat pipe-PV/T assembly 1 is adjusted; four support rods 15 are welded on a fixed plate 16 and are connected with sleeves 17 through welding, wherein the fixed plate 16 is arranged on a cross rod between keels of the greenhouse and bears the whole sun-shading device; the support rod 18 is welded with the connecting rod frame 13, and the telescopic height of the support rod 18 is clamped through the screw mandril 14; meanwhile, sunlight tracking can be carried out by rotating the connecting rod frame 13, so that the overall power generation and heat collection performance of the device is improved; a part of the generated electric energy is stored through the storage battery 30, and the other part of the generated electric energy can directly provide electric energy for the load 29; in order to ensure the circuit safety, the inversion control integrated machine 28 is connected; the water path part of the sun-shading device is connected through a hose 24, a third valve 21 and a fourth valve 22 are arranged on the hose 24, and a circulating pump 23 is used for circularly exchanging heat for the working medium to heat the heat storage water tank 25.
The invention can effectively utilize the phase change of the working medium to improve the heat collection efficiency by applying the heat pipe technology. Meanwhile, the surface temperature of the solar cell panel can be reduced through the photo-thermal module, and the power generation efficiency is improved (the output power is reduced by 0.4-0.5% when the temperature is increased by 1 ℃). The connecting rod frame is rotated timely to ensure that the heat pipe-PV/T assembly faces the sun in the maximum direction, and the inclination angle of the heat pipe-PV/T assembly can be changed by loosening and screwing the screw sleeve, so that solar energy is collected in the maximum area and is converted into heat energy and electric energy.
As shown in fig. 1, a second U-shaped groove 3 and a third U-shaped groove 4 are welded on the back of the frame of the heat pipe-PV/T assembly 1, a connecting rod 6 is connected and fixed through a second screw rod 8 and a third screw rod 9, a carrier, i.e., a connecting rod frame 13, can realize free rotation of the plate of the heat pipe-PV/T assembly 1, and the first screw rod 7, the second screw rod 8, the third screw rod 9 and the fourth screw rod 10 can also be connected in a hole-cutting and inserting manner; the U-shaped groove 2 is connected with the U-shaped groove 5 through a threaded connecting rod 11, the stroke of the threaded connecting rod 11 can be changed by screwing and loosening a screw sleeve 12, and then the adjusting device is changed within the range of 0-90 degrees.
As shown in fig. 1, the fixing plate 16 is fixed to the sleeve 17 by welding with the support rod 15, the surface of the sleeve 17 is provided with a wire, and the sun shading device is fixed by the screw top rod 14, and the solar radiation energy can be tracked within 360 ° by rotating the connecting rod frame 13; the connecting rod frame 13 can also realize automatic tracking of the sun by installing an electric push rod, a stepping motor and a solar tracker.
As shown in fig. 1, the heat pipe-PV/T1 assembly also employs a thin film battery, which has good flexibility and weak light property, and can also employ a solar battery such as polysilicon, monocrystalline silicon, dye sensitization, etc. to improve the power generation efficiency of the system; wherein the glass cover plate can also be a Low-e cover plate, and the system performance is improved.
The heat pipe-PV/T component 1 is additionally provided with the heat pipe, the heat collection efficiency of a system device is improved through the convective heat exchange, the radiant heat exchange and the phase change of working media in the heat pipe, the surface temperature of a solar panel is reduced, and the power generation efficiency is improved.
As shown in fig. 1, the connecting rod frame 13 is welded with a rod 18, the rod 18 is inserted into the sleeve 17, wherein the surface of the sleeve 17 is hooped by wires, and the overall height is controlled by the screw ejector rod 14. The heat pipe-PV/T assembly 1 can always face the sun by rotating the connecting rod frame 13 around the supporting rod 18, namely, the solar energy can be tracked. Connecting rod frame 13 can connect electric putter, carries out the autotracking solar energy through the PLC circuit, promotes electricity generation and heat collection efficiency.
As shown in figure 1, the invention can change the inclination angle of the sun-shading device according to the suitable growth temperature of crops, and convert solar energy into heat energy and electric energy through the heat pipe-PV/T assembly 1 on the premise of meeting the light demand of crops. In order to improve the performance of the sun shading system, a heat pipe is arranged in the heat pipe-PV/T assembly 1, so that the power generation and heat collection performance of the system is improved. Meanwhile, the connecting rod frame 13 is rotated to track the sun direction, so that the maximum utilization of energy is realized, and the system performance is further improved.
The invention is mainly divided into a photoelectric module and a photo-thermal module. The solar energy is converted into electrical energy by the heat pipe PV/T module 1 and supplied to a load 29 or stored by a battery 30. Meanwhile, the other part of light energy is converted into heat energy through the heat pipe-PV/T assembly 1, and the heat energy is stored in the heat storage water tank 25 through pipeline circulation, so that the problem of temperature rise and heat preservation of the greenhouse can be effectively solved to a certain extent.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several equivalents and modifications may be made without departing from the principle of the present invention, and these equivalents and modifications should also be included in the protection scope of the present invention.
Claims (4)
1. A heat pipe-PV/T integrated sun shading device is characterized in that a heat pipe is adopted as a photo-thermal module of a heat pipe-PV/T assembly (1), and heat exchange is carried out by utilizing phase change and convection heat exchange of working media in the pipe, and the solar energy is stored into a heat storage water tank (25) in a heat energy mode by carrying out circulating heat exchange on low-temperature water through a hose (24) by a circulating pump (23); the photovoltaic module of the heat pipe-PV/T assembly (1) is connected with an inversion control integrated machine (28), and a voltmeter (26) and an ammeter (27) are installed; the inversion control integrated machine (28) is connected with a load (29) and a storage battery (30), one part of solar energy is converted into electric energy through the heat pipe-PV/T assembly (1) and is supplied to the load (29), and the other part of the electric energy is stored in the storage battery (30); the first U-shaped groove (2), the second U-shaped groove (3), the third U-shaped groove (4) and the fourth U-shaped groove (5) are connected through a threaded connecting rod (11) and are respectively fixed through a first screw rod (7), a second screw rod (8), a third screw rod (9) and a fourth screw rod (10) in a perforation manner; the threaded connecting rods (11) are connected through screw sleeves (12), and the stroke distance of the threaded connecting rods (11) is changed in a mode of loosening and screwing the screw sleeves (12); wherein the threaded connecting rod (11) can rotate around the rod shaft of the screw rod (7); the second U-shaped groove (3) and the third U-shaped groove (4) are connected with a loop bar (6), and the loop bar (6) is nested on the connecting support bar (13) and rotates around the connecting support bar (13); the fixing plate (16) is welded with the supporting rod (15) and is welded with the sleeve (17) into a whole, wherein the surface of the sleeve (17) is hooped with wires and is inserted through the screw ejector rod (14) to further fix the overall height of the sun-shading device; the fixing plate (16) is welded on a cross bar between keels at two sides of the greenhouse to bear the whole device; a first U-shaped groove (2), a second U-shaped groove (3) and a third U-shaped groove (4) are respectively welded on the back of the heat pipe-PV/T assembly (1), and a connecting sleeve rod (6) is fixed through a second screw rod (8) and a third screw rod (9); the fourth U-shaped groove (5) is welded with a connecting rod frame (13), the first U-shaped groove (2) is connected with the third U-shaped groove (4) through a threaded connecting rod (11) and is fixed through a first screw rod (7) and a fourth screw rod (10); the solar heat pipe-PV/T assembly comprises a threaded connecting rod (11), a screw sleeve (12) is additionally arranged on the threaded connecting rod (11), the stroke of the threaded connecting rod is changed by loosening the screw sleeve (12) so as to adjust the sun-shading angle of the heat pipe-PV/T assembly (1), four support rods (15) are welded on a fixing plate (16), a connecting sleeve (17) is welded, the fixing plate (16) is arranged on a cross rod between keels of a greenhouse and bears the whole sun-shading device, a support rod (18) is welded with a connecting rod frame (13), the telescopic height of the support rod (18) is clamped through a screw ejector rod (14), meanwhile, sunlight tracking can be carried out through rotating the connecting rod frame (13), so that the power generation and heat collection performance of the whole device is improved, a part of generated electric energy is stored through a storage battery (30), the other part of generated electric energy can be directly provided for a load (29) end, an inversion control integrated machine (28, a third valve (21) and a fourth valve (22) are arranged on the hose (24), and the circulating pump (23) is used for circularly exchanging heat for the working medium to heat the heat storage water tank (25).
2. The heat pipe-PV/T integrated sun shading device according to claim 1, characterized in that a second U-shaped groove (3) and a third U-shaped groove (4) are welded on the back of the frame of the heat pipe-PV/T assembly (1), a connecting rod (6) is connected and fixed through a second screw rod (8) and a third screw rod (9), the free rotation of the plate of the heat pipe-PV/T assembly (1) can be realized through a carrier, namely a connecting rod frame (13), and the first screw rod (7), the second screw rod (8), the third screw rod (9) and the fourth screw rod (10) can also be connected in a hole-cutting and inserting manner; the U-shaped groove (2) is connected with the U-shaped groove (5) through a threaded connecting rod (11), the stroke of the threaded connecting rod (11) can be changed by screwing and loosening a screw sleeve (12), and then the adjusting device is changed within the range of 0-90 degrees.
3. The heat pipe-PV/T integrated solar protection device as claimed in claim 1, wherein the fixing plate (16) is fixed with the sleeve (17) by welding with the support rod (15), the surface of the sleeve (17) is provided with wire hooping, and the sun protection device is fixed by a screw ejector rod (14) and the tracking of solar radiation energy in a 360-degree range can be realized by rotating the connecting rod frame (13); the connecting rod frame (13) can also realize automatic tracking of the sun by installing an electric push rod, a stepping motor and a solar tracker.
4. The heat pipe-PV/T integrated sun shading device according to claim 1, wherein a thin film battery is also adopted in the heat pipe-PV/T (1) assembly, the flexibility and the weak light performance of the thin film battery are better, and solar cells such as polycrystalline silicon, monocrystalline silicon and dye sensitization can also be adopted to improve the power generation efficiency of the system; wherein the glass cover plate can also be a Low-e cover plate, and the system performance is improved.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754220.9A CN111802141A (en) | 2020-07-31 | 2020-07-31 | Heat pipe-PV/T integrated sun shading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754220.9A CN111802141A (en) | 2020-07-31 | 2020-07-31 | Heat pipe-PV/T integrated sun shading device |
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| CN111802141A true CN111802141A (en) | 2020-10-23 |
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| CN202010754220.9A Pending CN111802141A (en) | 2020-07-31 | 2020-07-31 | Heat pipe-PV/T integrated sun shading device |
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| CN112640704A (en) * | 2021-02-04 | 2021-04-13 | 兰州理工大学 | Solar internal shading system for greenhouse |
| WO2023285227A1 (en) * | 2021-07-15 | 2023-01-19 | Totalenergies Se | Solar system |
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Application publication date: 20201023 |