PVT photovoltaic electric water heater with phase change material

Abstract

The utility model belongs to the technical field of solar photovoltaic photo-thermal comprehensive application, and particularly relates to a PVT photovoltaic electric water heater with phase change materials, which comprises a PVT photovoltaic panel, a water tank, an electric three-way valve, a controller and a connecting pipe. The PVT photovoltaic panel is composed of a photovoltaic panel, a phase-change material, a snakelike flow channel, a PVT heat preservation part and a back plate. The water tank is composed of an outer skin, an inner container, a water tank heat preservation part, a direct-current heating pipe, an alternating-current heating pipe, a water inlet pipe and a water outlet pipe. The PVT photovoltaic panel generates electricity, the electricity is transmitted to the direct-current electric heating pipe through the controller, and when electricity generation of the PVT photovoltaic panel cannot meet the requirement, the alternating-current electric heating pipe is used for heating the water tank; when the temperature of the cold water is lower than that of the phase change heat storage material, the cold water passes through the snake-shaped flow channel in the PVT photovoltaic panel, exchanges heat with the phase change heat storage material, is heated and then enters the water tank. When the temperature of the cold water is higher than that of the phase change heat storage material, the cold water directly enters the water tank.

Description

Technical Field

[0001] The utility model belongs to the technical field of comprehensive application of solar photovoltaic and thermal energy, and particularly relates to a PVT photovoltaic electric water heater with phase change material. Background Art

[0002] Solar energy is increasingly being used as a clean and sustainable energy source. Solar energy utilization is mainly divided into two aspects: photovoltaic and solar thermal. The application of solar thermal is mainly solar water heaters, which mainly convert sunlight directly into heat. Solar water heaters are divided into vacuum tube solar water heaters and flat plate solar water heaters. Vacuum tube solar water heaters have the disadvantage of fragile vacuum tubes. The disadvantage of flat plate solar water heaters is that water cannot flow directly in the flat plate and it does not have antifreeze function. Traditional solar photovoltaic power generation devices waste a lot of heat energy while generating electricity, resulting in low energy utilization rate. PVT photovoltaic panels combine photovoltaic and solar thermal to achieve a higher comprehensive utilization rate of solar energy. PVT photovoltaic panels reduce the temperature of the battery panel, improve power generation efficiency, and improve solar energy utilization rate by circulating heat transfer medium in the flow channel on the back of the photovoltaic panel. Summary of the invention

[0003] The utility model combines a PVT photovoltaic panel with an electric water heater and designs a PVT photovoltaic electric water heater with phase change material. While increasing the power generation power of the photovoltaic panel, the cold water is heated before entering the water tank, thereby reducing the heating temperature difference of the electric water heater and achieving the purpose of energy saving.

[0004] The technical solution adopted by the utility model to solve the technical problems existing in the known technology is:

[0005] The utility model belongs to the field of solar photovoltaic and thermal comprehensive application technology, and particularly relates to a PVT photovoltaic electric water heater with phase change material, including: PVT photovoltaic panel, water tank, electric three-way valve, controller, connecting pipe; PVT photovoltaic panel is composed of photovoltaic panel, phase change material, serpentine flow channel, PVT insulation, back plate; water tank is composed of outer skin, inner tank, water tank insulation, DC heating pipe, AC heating pipe, water inlet pipe, and water outlet pipe; PVT photovoltaic panel generates electricity, which is transmitted to DC heating pipe through controller. When the power generation of PVT photovoltaic panel cannot meet the requirements, AC heating pipe is used to heat the water tank; when the temperature of cold water is lower than the temperature of phase change thermal storage material, cold water passes through the serpentine flow channel inside PVT photovoltaic panel, exchanges heat with phase change thermal storage material, and enters the water tank after being heated. When the temperature of cold water is higher than the temperature of phase change thermal storage material, cold water directly enters the water tank. The advantages are: the phase change material cools the PVT photovoltaic panel and improves the power generation efficiency of the PVT photovoltaic panel. After the cold water is heated by the phase change material, the heating temperature difference of the electric water heater is reduced, thus achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 , Figure 2 , Figure 3 , Figure 4 It is a structural schematic diagram of the utility model;

[0007] Figure 1 It is a structure diagram of a photovoltaic electric water heater with phase change material PVT;

[0008] Figure 2 yes Figure 1 AA section view in the view;

[0009] Figure 3 yes Figure 2 The serpentine flow path diagram in ;

[0010] Figure 4 This is the connection diagram of the PVT photovoltaic panel;

[0011] Figure 1 , Figure 2 , Figure 3 , Figure 4 middle:

[0012] 10. PVT photovoltaic panel; 11. Photovoltaic panel; 12. Layering strip; 13. Frame; 14. Back panel; 15. PVT thermal insulation; 16. Phase change thermal storage material; 17. Serpentine flow channel; 18. Phase change thermal storage material box;

[0013] 20. Water tank; 21. DC heating tube; 22. Inner tank; 23. Outer skin; 24. Water tank insulation; 25. AC heating tube; 26. Water inlet pipe; 27. Water outlet pipe;

[0014] 30. Controller; 40. Connecting pipe; 50. Electric three-way valve; 60. AC heating pipe connecting wire; 70. PVT photovoltaic panel connecting wire; 80. DC heating pipe connecting wire; 90. Electric three-way valve connecting wire;

[0015] 171. Water outlet; 172. Water inlet. DETAILED DESCRIPTION

[0016] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0017] Figure 1In the figure, the electric three-way valve 50 is respectively connected to the cold water, the water inlet 172, and the water inlet pipe 26, the water outlet 171 on the PVT photovoltaic panel 10 is connected to the water inlet pipe 26 on the water tank 20, the controller 30 is connected to the AC heating pipe 25 through the AC heating pipe connecting line 60, the controller 30 is connected to the DC heating pipe 21 through the DC heating pipe connecting line 80, the controller 30 is connected to the electric three-way valve 50 through the electric three-way valve connecting line 90, and the controller 30 is connected to the PVT photovoltaic panel connecting line 70.

[0018] Figure 1 In the water tank 20, the water tank insulation 24 is located between the inner tank 22 and the outer skin 23, the AC heating tube 25 and the DC heating tube 21 are respectively fixed at both ends of the inner tank 22, the water inlet pipe 26 is located at the left end of the water tank 20, and the water outlet pipe 27 is located at the right end of the water tank 20.

[0019] Figure 2 , Figure 3 In the embodiment, the frame 13 is formed into a square shape by rivets or corner codes, the photovoltaic panel 11 is fixed to the frame 13 by a pressure strip 12, the phase change thermal storage material box 18 is closely attached to the photovoltaic panel 11, and the phase change thermal storage material 16 is placed inside the phase change thermal storage material box 18. The phase change thermal storage material 16 is paraffin, calcium chloride hexahydrate, and sodium hydrogen sulfate decahydrate. The serpentine flow channel 17 runs through the phase change thermal storage material 16, and the water outlet 171 and the water inlet 172 are respectively at the two ends of the serpentine flow channel 17. The water outlet 171 and the water inlet 172 extend out of the outer end of the frame 13, and the back plate 14 is respectively inserted into the groove at the lower part of the frame 13, and the PVT insulation 15 is placed between the back plate 14 and the phase change thermal storage material box 18.

[0020] Figure 4 In the embodiment, multiple groups of PVT photovoltaic panels 10 are connected via connecting pipes 40 .

[0021] The operating principle is: the PVT photovoltaic panel 10 generates electricity, which is transmitted to the DC heating tube 21 through the controller 30. When the power generation of the PVT photovoltaic panel 10 cannot meet the requirements, the AC heating tube 25 is used to heat the water in the water tank 20; when the temperature of the cold water is lower than the temperature of the phase change thermal storage material 16, A and C on the electric three-way valve 50 are connected, and the cold water passes through the serpentine flow channel 17 inside the PVT photovoltaic panel 10, exchanges heat with the phase change thermal storage material 16, and enters the water tank 20 after being heated. When the temperature of the cold water is higher than the temperature of the phase change thermal storage material 16, A and B on the electric three-way valve 50 are connected, and the cold water directly enters the water tank 20. The advantages are: the phase change thermal storage material 16 cools the PVT photovoltaic panel 10, improves the power generation efficiency of the PVT photovoltaic panel 10, and after the cold water is heated by the phase change thermal storage material 16, the heating temperature difference of the water tank 20 is reduced, achieving the purpose of energy saving.

[0022] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A PVT photovoltaic electric water heater with phase change material, comprising a PVT photovoltaic panel (10), a water tank (20), a controller (30), a connecting pipe (40), an electric three-way valve (50), an AC heating pipe connecting line (60), a PVT photovoltaic panel connecting line (70), a DC heating pipe connecting line (80), and an electric three-way valve connecting line (90); characterized in that: The electric three-way valve (50) is respectively connected to the cold water, the water inlet (172), and the water inlet pipe (26); the water outlet (171) on the PVT photovoltaic panel (10) is connected to the water inlet pipe (26) on the water tank (20); the controller (30) is connected to the AC heating pipe (25) via the AC heating pipe connecting line (60); the controller (30) is connected to the DC heating pipe (21) via the DC heating pipe connecting line (80); the controller (30) is connected to the electric three-way valve (50) via the electric three-way valve connecting line (90); the controller (30) is connected to the PVT photovoltaic panel connecting line (70); the PVT photovoltaic panel (10) comprises a photovoltaic panel (11), a layering strip (12), a frame (13), a back plate (14), a PVT The invention is composed of a heat preservation device (15), a phase change heat storage material (16), a serpentine flow channel (17), and a phase change heat storage material box (18); the photovoltaic panel (11) is fixed to the frame (13) by means of a pressure strip (12); the phase change heat storage material box (18) is closely attached to the photovoltaic panel (11); the phase change heat storage material (16) is placed inside the phase change heat storage material box (18); the serpentine flow channel (17) passes through the phase change heat storage material (16); and the water outlet (171) and the water inlet (172) extend out of the outer end of the frame (13).

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