CN221825965U - A tracking microchannel heat pipe photovoltaic-thermal coupling phase change thermal storage device - Google Patents

Abstract

The utility model discloses a tracking micro-channel heat pipe type photovoltaic photo-thermal coupling phase change heat storage device, and belongs to the technical field of solar photovoltaics. The utility model solves the problem that the heat accumulation caused by the high-temperature environment formed by small heat capacity of surrounding air seriously affects the solar photovoltaic power generation efficiency when the photovoltaic module works in the prior art, and comprises a solar tracking bracket, wherein the solar tracking bracket is provided with the photovoltaic module, one side of the photovoltaic module, which is close to the solar tracking bracket, is provided with a micro-channel heat conduction member and a phase-change heat storage member, the micro-channel heat conduction member comprises a heat pipe evaporation section and a heat pipe condensation section, the heat pipe condensation section is arranged in the phase-change heat storage member, and the phase-change heat storage member is provided with a plurality of heat dissipation holes. Under the condition that natural heat dissipation of the photovoltaic module is not affected, the heat pipe is utilized to absorb the heat of the back surface of the module, the phase change material is utilized to store part of the heat of the module, and the heat accumulation phenomenon caused by a high-temperature environment formed by small heat capacity of surrounding air is relieved.

Description

A tracking microchannel heat pipe photovoltaic-thermal coupling phase change thermal storage device

Technical Field

The utility model belongs to the technical field of solar photovoltaics, and in particular relates to a tracking microchannel heat pipe photovoltaic light-heat coupling phase change heat storage device.

Background Art

As an environmentally friendly and sustainable form of energy, renewable energy has become a common concern and a field that countries around the world are committed to promoting. The photovoltaic industry has risen rapidly and the market size has continued to expand. At the same time, photovoltaic technologies with high efficiency, energy saving and environmental protection have made continuous breakthroughs.

Since its introduction, solar photovoltaic devices have become an important renewable energy technology and have been widely used in industrial and residential areas. The design of the tracking device is conducive to the photovoltaic modules receiving more sunlight and increasing power generation; however, in actual use, we will find a key problem: when the photovoltaic modules absorb sunlight cells during the day and convert them into electrical energy, they will generate a lot of waste heat. Not only can this waste heat not be effectively utilized, but it will also cause the module to overheat. Under high temperatures, the power generation efficiency of photovoltaic modules will drop significantly, and it may accelerate the aging of the equipment and reduce its service life.

At present, a variety of sunlight tracking devices have been designed and applied. Such as an easily adjustable roof-mounted tracking photovoltaic fixed bracket (CN202123374556.1), a single-axis tracking photovoltaic system (CN202111306894.3), and a new dual-axis tracking photovoltaic bracket (CN202111065616.3). These designs unilaterally consider enhancing energy reception and ignore the temperature regulation of photovoltaic modules. In summary, there is an urgent need for a photovoltaic module tracking and temperature control coupling device to solve the heat accumulation caused by the high temperature environment formed by the small heat capacity of the surrounding air when the existing photovoltaic modules are working, and further improve the efficiency of solar photovoltaic power generation.

Utility Model Content

In view of the problem in the prior art that when photovoltaic modules are working, heat accumulation is caused by the high temperature environment formed by the small heat capacity of the surrounding air, which seriously affects the efficiency of solar photovoltaic power generation, the utility model provides a tracking microchannel heat pipe photovoltaic thermal coupling phase change heat storage device.

The technical solution adopted by the utility model is as follows:

A tracking microchannel heat pipe photovoltaic-thermal coupling phase change heat storage device comprises a solar tracking bracket, a photovoltaic module is arranged on the solar tracking bracket, a microchannel heat conducting component and a phase change heat storage component are arranged on the side of the photovoltaic module close to the solar tracking bracket, the microchannel heat conducting component comprises a heat pipe evaporation section and a heat pipe condensation section, the heat pipe condensation section is arranged in the phase change heat storage component, and a plurality of heat dissipation holes are arranged on the phase change heat storage component.

After adopting this technical solution, when the system is running, part of the light irradiating on the photovoltaic module is converted into electrical energy, and the other part is converted into heat energy and dissipated into the air or transferred to the heat pipe evaporation section of the microchannel heat pipe thermal conductive component. The microchannel heat pipe thermal conductive component timely introduces the heat from the photovoltaic module into the phase change thermal storage component through the heat absorption, evaporation and condensation cycle of the refrigerant in the pipe to complete the temperature control of the photovoltaic module. At night, the heat pipe and the heat dissipation hole jointly complete the heat release of the phase change thermal storage component to the surrounding low temperature environment, realize the heat clearing of the phase change thermal storage component, and provide a basis for the next daytime heat storage. At night, the heat pipe and the heat dissipation hole jointly complete the heat release of the phase change thermal storage component to the surrounding low temperature environment, realize the heat clearing of the phase change thermal storage component, and provide a basis for the next daytime heat storage.

Preferably, the microchannel heat-conducting component comprises a plurality of heat pipes arranged in parallel and equidistantly, wherein a refrigerant working medium is arranged in the heat pipes, and each of the heat pipes comprises a heat pipe evaporation section and a heat pipe condensation section.

Preferably, a phase change heat storage component is provided at each end of the photovoltaic module, the heat pipe condensation section and the heat pipe evaporation section of two adjacent heat pipes are in opposite positions, and the heat pipe condensation sections of two adjacent heat pipes are respectively arranged in two phase change heat storage components.

After adopting this technical solution, during the day, when the solar tracking bracket is running in the morning and afternoon, the top and bottom positions are swapped, and the heat pipes alternately arranged at the head and tail realize heat control of the photovoltaic components at different time periods.

Preferably, a phase-change heat storage component support frame is provided at each end of the photovoltaic assembly, and the two phase-change heat storage components are respectively arranged in the two phase-change heat storage component support frames.

Preferably, the heat pipe condensation section and the heat pipe evaporation section of each heat pipe are connected via a bend insulation section, and the bend insulation section does not contact the photovoltaic module.

After adopting this technical solution, since the heat pipe evaporation section is in contact with the photovoltaic module, and the heat pipe condensation section is arranged in the phase change heat storage component, there is a certain height difference. The heat pipe condensation section and the heat pipe evaporation section are connected through the bent pipe insulation section to adapt to the height difference.

Preferably, the photovoltaic module includes a first glass layer and a second glass layer, the second glass layer is connected to the solar tracking bracket, a plurality of battery cells are arranged between the first glass layer and the second glass layer, gaps are arranged between the plurality of battery cells, the width of the gaps is 0.5-2mm, the heat pipe evaporation section of the microchannel thermal conductive component is arranged in the gap between the battery cells, the width of the heat pipe evaporation section is 20-25mm, and the heat pipe evaporation section is in contact with the second glass layer.

Preferably, a reflective coating is provided on a side of the heat pipe evaporation section close to the photovoltaic module, the width of the reflective coating is 4-5 mm, and the reflective coating is in contact with the gap of the photovoltaic module.

After adopting this technical solution, the surface of the reflective coating (film) is a wavy or triangular microstructure, which causes the received light to be reflected to the battery cell areas on both sides of the gap, so that the light that passes through the gap between the battery cells can be re-irradiated onto the battery cell through the reflective coating on the surface of the evaporation section of the microchannel heat pipe to continue to generate electricity, thereby effectively utilizing solar energy.

Preferably, the heat pipe evaporation section is a microchannel flat tube.

Preferably, the bottom of the solar tracking bracket is connected to a fixed base.

Preferably, the phase-change heat storage component comprises a shell, a cavity is provided in the shell, a phase-change heat storage element is provided in the cavity, and a plurality of through grooves for inserting the condensation section of the heat pipe are provided on the shell, and the through grooves and the heat dissipation holes are evenly spaced.

In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

1. The present invention uses heat pipes to absorb heat from the back of the components without affecting the natural heat dissipation of the photovoltaic components, thereby increasing the heat dissipation rate of the components, and uses phase change materials to store part of the heat of the components, thereby slowing down the heat accumulation phenomenon caused by the high temperature environment formed by the small heat capacity of the surrounding air. This solves the problem of heat accumulation caused by the high temperature environment formed by the small heat capacity of the surrounding air when the existing photovoltaic components are working, and further improves the efficiency of solar photovoltaic power generation.

2. The heat dissipation holes solve the problems of low thermal conductivity and low heat dissipation rate of phase change materials, helping the phase change heat storage components to release heat to the surrounding environment. The larger surface area helps to release heat quickly and prevents the phase change heat storage device from reaching saturation due to complete phase change and causing negative impact on the heat dissipation process.

3. The phase-change heat storage component utilizes its high heat storage density characteristics to store a large amount of latent heat, and through the heat transfer effect of the heat pipe evaporation section, it can achieve the purpose of controlling the operating temperature of the photovoltaic module.

4. The heat pipe (heat transfer)-phase change material (heat storage) structure alternately and symmetrically arranged at the top and bottom of the photovoltaic module has good heat absorption and heat dissipation performance, realizing heat absorption and temperature control of the tracker at different time periods and different angles.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be described by way of examples and with reference to the accompanying drawings, in which:

Figure 1 is a schematic diagram of the overall structure of the utility model;

FIG2 is a schematic diagram of the positional relationship between the photovoltaic module, the microchannel heat conducting component and the phase change heat storage component in the utility model;

3 is a schematic diagram of the connection structure of the microchannel heat conduction component and the phase change heat storage component in the utility model in a side view;

4 is a schematic diagram of the connection structure of the microchannel heat conduction component and the phase change heat storage component in the present invention in a top view;

FIG5 is a schematic diagram of the structure of the reflective coating in the utility model;

Among them: 1-photovoltaic module, 1-a-first glass layer, 1-b-battery cell, 1-c-second glass layer, 2-microchannel thermal conductive component, 2-a-heat pipe evaporation section, 2-b-bend insulation section, 2-c-heat pipe condensation section, 2-d-reflective coating, 3-phase change heat storage component, 4-heat dissipation hole, 5-phase change heat storage component support frame, 6-solar tracking bracket, 7-fixed base.

DETAILED DESCRIPTION

To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

The utility model is described in detail below in conjunction with Figures 1 to 5.

A tracking microchannel heat pipe photovoltaic-thermal coupled phase change heat storage device, including a solar tracking bracket 6 (ZRP-1*6 of Shandong Chaori New Energy Technology Co., Ltd.), a photovoltaic component 1 is arranged on the solar tracking bracket 6, and a microchannel heat-conducting component 2 and a phase change heat storage component 3 are arranged on the side of the photovoltaic component 1 close to the solar tracking bracket 6, the microchannel heat-conducting component 2 includes a heat pipe evaporation section 2-a and a heat pipe condensation section 2-c, the heat pipe condensation section 2-c is arranged in the phase change heat storage component 3, and a plurality of heat dissipation holes 4 are arranged on the phase change heat storage component 3.

In this embodiment, the microchannel heat-conducting component 2 includes a plurality of heat pipes arranged in parallel and equidistantly, wherein refrigerant such as R134, ammonia, ethylene glycol, etc. is arranged in the heat pipes, and each of the heat pipes includes a heat pipe evaporation section 2-a and a heat pipe condensation section 2-c.

In this embodiment, a phase change heat storage component 3 is provided at each end of the photovoltaic assembly 1, the positions of the heat pipe condensation section 2-c and the heat pipe evaporation section 2-a of the two adjacent heat pipes are opposite, and the heat pipe condensation sections 2-c of the two adjacent heat pipes are respectively arranged in two phase change heat storage components 3.

In this embodiment, a phase change heat storage component support frame 5 is provided at each end of the photovoltaic component 1, and the two phase change heat storage components 3 are respectively arranged in the two phase change heat storage component support frames 5. The stability of the connection between the photovoltaic component 1 and the phase change heat storage component 3 can be enhanced.

In this embodiment, the heat pipe condensation section 2 - c and the heat pipe evaporation section 2 - a of each heat pipe are connected via a curved pipe insulation section 2 - b, and the curved pipe insulation section 2 - b does not contact the photovoltaic module 1.

As shown in FIG2 , in this embodiment, the photovoltaic module 1 includes a first glass layer 1-a and a second glass layer 1-c, the second glass layer 1-c is connected to a solar tracking bracket 6, a plurality of cells 1-b are arranged between the first glass layer 1-a and the second glass layer 1-c, a gap is arranged between the plurality of cells 1-b, the heat pipe evaporation section 2-a of the microchannel heat conducting member 2 is arranged at the gap between the cells 1-b, and the heat pipe evaporation section 2-a is in contact with the second glass layer 1-c, and the width of the gap is 0.5-2mm. The heat pipe evaporation section 2-a and the second glass layer 1-c are connected by hot melt adhesive, and the bonding position is the gap between the cells, and the light energy of the cell gap is effectively gathered by utilizing the light transmittance of the hot melt adhesive and the reflective coating 2-d on the surface of the heat pipe evaporation section 2-a, thereby improving the utilization rate of light energy.

In this embodiment, a reflective coating 2 - d is provided on the side of the heat pipe evaporation section 2 - a close to the photovoltaic module 1 . The width of the reflective coating 2 - d is 4-5 mm, and the reflective coating 2 - d is in contact with the gap of the photovoltaic module 1 .

In this embodiment, as shown in FIG5 , the surface of the reflective coating 2 - d is a concave-convex structure composed of a plurality of triangular prism ridges, which causes the received light to be reflected to the cell 1 - b region on both sides of the gap. (The preparation method of the concave-convex structure is selected according to the actual situation, for example, an auxiliary device can be used to scrape out the concave-convex structure, and then the coating can be laid on the concave-convex structure, or an auxiliary device can be used to scrape out the concave-convex structure after laying the coating.)

In this embodiment, the heat pipe evaporation section 2-a is a microchannel flat tube with a width of 20-25 mm and a thickness of 2-3.5 mm. The microchannel has a width of 0.8-2 mm and a thickness of 1-2.5 mm.

In this embodiment, a fixing base 7 is connected to the bottom of the solar tracking bracket 6 .

In this embodiment, the phase-change heat storage component 3 includes a shell, a cavity is provided in the shell, a phase-change heat storage component is provided in the cavity, and a plurality of through grooves for inserting the heat pipe condensation section 2-c are provided on the shell, and the through grooves and the heat dissipation holes 4 are evenly spaced. When the phase-change temperature is reached, the phase-change heat storage component can absorb a large amount of heat, thereby reducing the temperature of the photovoltaic module 1 and the surrounding environment of the photovoltaic module 1. The heat dissipation holes 4 help the system release heat to the surrounding environment, and the larger surface area helps to release heat quickly, preventing the phase-change heat storage component 3 from reaching saturation due to complete phase change and causing a negative impact on the heat dissipation process. The phase-change heat storage component can be paraffin, polyurethane, polyethylene glycol, etc., and in this embodiment, it is paraffin.

In this embodiment, the heat pipe evaporation section 2 - a , the heat pipe condensation section 2 - c and the phase change heat storage component support frame 5 are all aluminum structural parts, which have good thermal conductivity and lightness.

The specific use method of the utility model is as follows:

Referring to Figures 1 to 4, when the system is running, the solar tracking bracket 6 drives the entire device toward the sun, and part of the light irradiated on the photovoltaic module 1 is converted into electrical energy, and the other part is converted into heat energy and dissipated into the air or transferred to the heat pipe evaporation section 2-a of the microchannel heat pipe thermal conductive component 2, while the light passing through the gap between the battery cells 1-b is re-irradiated on the battery cells 1-b through the reflective coating 2-d on the surface of the heat pipe evaporation section 2-a to continue to generate electricity. The heat pipe timely introduces the heat on the photovoltaic module 1 into the phase change thermal storage component 2 through the heat absorption, evaporation and condensation cycle of the refrigerant in the pipe, completing the temperature control of the photovoltaic module 1. During the day, when the solar tracking bracket 6 is running in the morning and afternoon, the top and bottom positions are interchanged, and the hot channel heat pipes alternately arranged at the head and tail realize the heat control of the photovoltaic module at different time periods. At night, the heat pipe and the heat dissipation hole 4 jointly complete the heat release of the phase change thermal storage component 2 to the surrounding low temperature environment, realize the heat removal of the phase change thermal storage component 2, and provide a basis for the next daytime heat storage.

The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims (10)

1. A tracking microchannel heat pipe photovoltaic-thermal coupling phase change heat storage device, characterized in that it comprises a solar tracking bracket (6), a photovoltaic module (1) is arranged on the solar tracking bracket (6), a microchannel heat conduction component (2) and a phase change heat storage component (3) are arranged on the side of the photovoltaic module (1) close to the solar tracking bracket (6), the microchannel heat conduction component (2) comprises a heat pipe evaporation section (2-a) and a heat pipe condensation section (2-c), the heat pipe condensation section (2-c) is arranged in the phase change heat storage component (3), and a plurality of heat dissipation holes (4) are arranged on the phase change heat storage component (3). 2. According to claim 1, a tracking microchannel heat pipe photovoltaic thermal coupling phase change heat storage device is characterized in that: the microchannel heat-conducting component (2) includes a plurality of heat pipes arranged in parallel and equidistantly, and a refrigerant working medium is arranged in the heat pipes, and each of the heat pipes includes a heat pipe evaporation section (2-a) and a heat pipe condensation section (2-c). 3. According to claim 2, a tracking microchannel heat pipe photovoltaic thermal coupling phase change heat storage device is characterized in that: a phase change heat storage component (3) is provided at each end of the photovoltaic module (1), the heat pipe condensation section (2-c) and the heat pipe evaporation section (2-a) of two adjacent heat pipes are in opposite positions, and the heat pipe condensation section (2-c) of two adjacent heat pipes is respectively arranged in two phase change heat storage components (3). 4. According to claim 3, a tracking microchannel heat pipe photovoltaic thermal coupling phase change heat storage device is characterized in that: a phase change heat storage component support frame (5) is provided at each end of the photovoltaic module (1), and the two phase change heat storage components (3) are respectively arranged in the two phase change heat storage component support frames (5). 5. According to claim 2, a tracking microchannel heat pipe photovoltaic thermal coupling phase change heat storage device is characterized in that the heat pipe condensation section (2-c) and the heat pipe evaporation section (2-a) of each heat pipe are connected through a bent pipe insulation section (2-b), and the bent pipe insulation section (2-b) does not contact the photovoltaic module (1). 6. A tracking microchannel heat pipe photovoltaic thermal coupling phase change heat storage device according to any one of claims 1 to 4, characterized in that: the photovoltaic component (1) comprises a first glass layer (1-a) and a second glass layer (1-c), the second glass layer (1-c) is connected to a solar tracking bracket (6), a plurality of battery cells (1-b) are arranged between the first glass layer (1-a) and the second glass layer (1-c), a gap is arranged between the plurality of battery cells (1-b), the width of the gap is 0.5-2 mm, the heat pipe evaporation section (2-a) of the microchannel heat conducting component (2) is arranged at the gap between the battery cells (1-b), the width of the heat pipe evaporation section (2-a) is 20-25 mm, and the heat pipe evaporation section (2-a) is in contact with the second glass layer (1-c). 7. According to claim 5, a tracking microchannel heat pipe photovoltaic thermal coupling phase change heat storage device is characterized in that: a reflective coating (2-d) is provided on the side of the heat pipe evaporation section (2-a) close to the photovoltaic module (1), the width of the reflective coating (2-d) is 4-5mm, and the reflective coating (2-d) is in contact with the gap of the photovoltaic module (1). 8. A tracking microchannel heat pipe photovoltaic-thermal coupled phase change heat storage device according to any one of claims 1 to 4, characterized in that: the heat pipe evaporation section (2-a) is a microchannel flat tube. 9. A tracking microchannel heat pipe photovoltaic-thermal coupled phase change heat storage device according to any one of claims 1 to 4, characterized in that: the bottom of the solar tracking bracket (6) is connected to a fixed base (7). 10. A tracking microchannel heat pipe photovoltaic thermal coupling phase change heat storage device according to any one of claims 1-4, characterized in that: the phase change heat storage component (3) includes a shell, a cavity is provided in the shell, a phase change heat storage component is provided in the cavity, and a plurality of through grooves for inserting the heat pipe condensation section (2-c) are provided on the shell, and the through grooves and the heat dissipation holes (4) are evenly spaced.