Fresnel lens follow-up type efficient solar heat collection and energy storage device

Abstract

The utility model relates to the technical field of solar heat collection and energy storage, in particular to a Fresnel lens follow-up type efficient solar heat collection and energy storage device which comprises a square Fresnel lens and a conical focusing light beam of the square Fresnel lens, and the bottom of the square Fresnel lens and the bottom of the conical focusing light beam of the square Fresnel lens are communicated and fixedly provided with a hollow ball. A heat conduction oil tank is movably installed on the outer side of the hollow ball, heat conduction oil is filled in the heat conduction oil tank, the bottom of the hollow ball is soaked in the heat conduction oil, a heat storage tank is installed at the bottom of the heat conduction oil tank, and the heat storage tank is communicated with the heat conduction oil tank through a circulating pipeline and a circulating pump. Photothermal conversion energy is conveyed into the energy storage device through heat conduction oil, the heat conduction efficiency is high, the heat storage box is filled with square block-shaped heat containing stones, slits exist between the heat containing stones, and heat exchange between the heat conduction oil and the heat containing stones is accelerated.

Description

Technical Field

[0001] This utility model relates to the field of solar thermal energy collection and storage technology, specifically a Fresnel lens-driven high-efficiency solar thermal energy collection and storage device. Background Technology

[0002] In recent years, solar thermal utilization technology has received increasing attention and research. Solar thermal utilization technology collects solar radiation energy projected onto the light-collecting surface through solar thermal collectors, converts it into heat energy, and uses working fluids such as air or water to collect this heat, providing the heat energy needed for various production processes or daily life.

[0003] my country is a country with abundant solar energy resources. Two-thirds of its land area receives more than 2,300 hours of sunshine per day, and the annual total solar radiation per unit area exceeds 5,000 MJ / m2. Utilizing solar energy, an inexhaustible green energy source, for power generation is of great significance to the sustainable development of my country and even all mankind. Under standard conditions, the incident light on one square meter is 1,000 W. Currently, the solar energy utilization rate of the most common solar water heaters is only about 10%, which needs to be significantly improved to be more effective.

[0004] Among numerous solar concentrating technologies, the application of Fresnel lenses has received increasing attention, especially in the field of high-concentration. Compared with other concentrating methods, Fresnel lenses have many advantages, such as small size, light weight, low processing cost, ease of mass production, and safety and reliability. In addition, point-focusing Fresnel lenses can achieve a concentration effect of more than 1000 times. However, in the current way of utilizing Fresnel lenses, most of the collected energy is lost back into the environment, resulting in low utilization. There is a need to develop a relatively inexpensive and reliable method to collect as much solar and thermal energy as possible, thereby improving the overall utilization rate of solar energy. Utility Model Content

[0005] To address the aforementioned issues, this application provides a Fresnel lens-driven high-efficiency solar thermal energy collection and storage device, which solves the problem that most of the energy collected by the Fresnel lens is lost back into the environment, resulting in low utilization.

[0006] A Fresnel lens-driven high-efficiency solar thermal energy collection and storage device includes a square Fresnel lens and its conical focusing beam. A hollow sphere is fixedly installed at the bottom of the square Fresnel lens and its conical focusing beam. A thermal oil tank is movably installed on the outside of the hollow sphere. The thermal oil tank is filled with thermal oil. The bottom of the hollow sphere is immersed in the thermal oil. A heat storage tank is installed at the bottom of the thermal oil tank. The heat storage tank and the thermal oil tank are connected through a circulation pipe and a circulation pump.

[0007] Secondly, a lens bracket is fixedly installed on the outside of the square Fresnel lens and its conical focusing beam, a rotating shaft is fixedly connected to the outside of the hollow sphere, a motor is connected to the end of the rotating shaft, a rotating bearing is connected to the outside of the rotating shaft, and a rotating base is connected to the outside of the rotating bearing.

[0008] Secondly, a counterweight ball is fixedly installed at the bottom of the lens bracket.

[0009] Secondly, the heat-conducting oil tank is fixedly connected to the rotating base.

[0010] Secondly, the heat storage box has an external interface that runs through its outer side, and a sealing cover is installed on the outside of the external interface. The two external interfaces of the heat storage box have the same structural dimensions and can be interchanged.

[0011] The beneficial effects of this utility model are as follows:

[0012] The Fresnel lens follow-up high-efficiency solar thermal energy collection and storage device described in this utility model uses latitude and longitude to set the solar orbit and high-precision solar tracking using four quadrants to ensure that it can still follow the sun even when it is covered by clouds.

[0013] The heat-absorbing hollow sphere is completely immersed in the heat transfer oil, and the photothermal conversion energy is transferred to the energy storage device through the heat transfer oil, resulting in high heat transfer efficiency;

[0014] The heat storage tank is filled with square blocks of heat-containing stones, and there are narrow gaps between the heat-containing stones, which accelerates the heat exchange between the heat transfer oil and the heat-containing stones. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 A schematic diagram of the lens support structure of a Fresnel lens follow-up high-efficiency solar thermal energy collection and storage device provided by this utility model;

[0017] Figure 2 A schematic diagram of the heat transfer oil tank structure of a Fresnel lens follow-up high-efficiency solar thermal energy collection and storage device provided by this utility model;

[0018] Figure 3 A schematic diagram of the rotating base structure of a Fresnel lens follow-up high-efficiency solar thermal energy collection and storage device provided by this utility model;

[0019] Figure 4 A schematic diagram of the heat storage box structure of a Fresnel lens follow-up high-efficiency solar thermal energy collection and storage device provided for this utility model;

[0020] Figure 5 A schematic diagram of the deflection structure of a Fresnel lens follower-type high-efficiency solar thermal energy collection and storage device provided by this utility model;

[0021] Figure 6 This is a schematic diagram of the overall structure of a Fresnel lens-guided high-efficiency solar thermal energy collection and storage device provided by this utility model.

[0022] In the picture:

[0023] 1. Square Fresnel lens and its conical focusing beam; 2. Lens support; 3. Hollow sphere; 4. Rotating bearing; 5. Counterweight sphere; 6. Heat transfer oil tank; 7. Circulation pipeline; 8. Rotating base; 9. Heat storage tank. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0025] like Figure 1-6 As shown, this utility model embodiment provides a Fresnel lens-driven high-efficiency solar thermal energy collection and storage device, including a square Fresnel lens and its conical focusing beam 1. A hollow sphere 3 is fixedly installed at the bottom of the square Fresnel lens and its conical focusing beam 1. The inner wall and joint of the hollow sphere 3 are made of heat-insulating material to prevent scattered light and heat from overflowing. A thermal oil tank 6 is movably installed on the outside of the hollow sphere 3. The thermal oil tank 6 is filled with thermal oil. The bottom of the hollow sphere 3 is immersed in the thermal oil. Its material is a good conductor of heat. The inner wall is coated with a high-temperature heat-absorbing coating. A heat storage tank 9 is installed at the bottom of the thermal oil tank 6. The heat storage tank 9 and the thermal oil tank 6 are connected through a circulation pipe 7 and a circulation pump.

[0026] Furthermore, a lens bracket 2 is fixedly installed on the outside of the square Fresnel lens and its conical focusing beam 1, and a rotating shaft is fixedly connected to the outside of the hollow sphere 3. A motor is connected to the end of the rotating shaft to realize the pitch operation of the Fresnel lens heat collection part under program control.

[0027] A rotating bearing 4 is connected to the outside of the rotating shaft. The center of the rotating bearing 4 coincides with the center of the hollow ball 3. A rotating base 8 is connected to the outside of the rotating bearing 4. The rotating base 8 rotates horizontally and has an azimuth control motor installed on its inner side. Under program control, it works together with the bearing brake motor to achieve high-precision tracking of the sun.

[0028] In this embodiment, a location with no obstruction or minimal obstruction is selected as the application location. The solar orbit of each location on Earth can be calculated relatively rigorously. The solar orbit is planned by using the latitude, longitude and altitude of the location and input into the control system.

[0029] High-precision tracking of the sun is achieved using four-quadrant technology. Even when obstructed by clouds, trees, or buildings, the solar orbit data serves as guidance data to direct the system's operation, ensuring that the Fresnel lens remains perpendicular to the sunlight to the greatest extent possible.

[0030] Furthermore, a counterweight ball 5 is fixedly installed at the bottom of the lens bracket 2, so that the center of gravity of the pitch and rotation part falls on the bearing.

[0031] Furthermore, the heat-conducting oil tank 6 is fixedly connected to the rotating base 8.

[0032] Furthermore, the heat storage box 9 has an external interface that extends through its outer side. The two external interfaces of the heat storage box 9 have the same structural dimensions and are fitted with sealing caps. The heat storage box 9 contains heat-containing stones and heat-conducting oil. The heat capacity is controlled by a temperature difference display. A thermometer is installed between the heat-conducting oil and the heat-containing stones. The flow rate and volume of the heat-conducting oil are controlled by the temperature difference to achieve optimal heat transfer efficiency. When the temperature count no longer changes, it indicates that the heat storage box 9 has stored enough heat. At this time, the heat storage box 9 can be replaced, and heat can be transferred through the external interface of the heat storage box 9, or the heat storage box 9 can be sealed with the sealing cap.

[0033] Furthermore, the heat-containing stone is in the shape of a square block, and there are narrow gaps between the heat-containing stones, which accelerates the heat exchange between the heat-conducting oil and the heat-containing stone.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A Fresnel lens-driven high-efficiency solar thermal energy collection and storage device, comprising a square Fresnel lens and its conical focusing beam (1), characterized in that: The square Fresnel lens and its conical focusing beam (1) are connected to a hollow sphere (3) fixedly installed at the bottom. A heat transfer oil tank (6) is movably installed on the outside of the hollow sphere (3). The heat transfer oil tank (6) is filled with heat transfer oil. The bottom of the hollow sphere (3) is immersed in the heat transfer oil. A heat storage tank (9) is installed at the bottom of the heat transfer oil tank (6). The heat storage tank (9) and the heat transfer oil tank (6) are connected through a circulation pipe (7) and a circulation pump.

2. The Fresnel lens-guided high-efficiency solar thermal energy collection and storage device according to claim 1, characterized in that: The square Fresnel lens and its conical focusing beam (1) are fixedly mounted with a lens bracket (2) on the outside, and a rotating shaft is fixedly connected to the outside of the hollow sphere (3). A motor is connected to the end of the rotating shaft, a rotating bearing (4) is connected to the outside of the rotating shaft, and a rotating base (8) is connected to the outside of the rotating bearing (4).

3. The Fresnel lens-guided high-efficiency solar thermal energy collection and storage device according to claim 2, characterized in that: A counterweight ball (5) is fixedly installed at the bottom of the lens bracket (2).

4. The Fresnel lens-guided high-efficiency solar thermal energy collection and storage device according to claim 2, characterized in that: The heat-conducting oil tank (6) is fixedly connected to the rotating base (8).

5. The Fresnel lens-guided high-efficiency solar thermal energy collection and storage device according to claim 1, characterized in that: The heat storage box (9) has an external interface through the outside, and a sealing cover is installed on the outside of the external interface. The two external interfaces of the heat storage box (9) have the same structural dimensions.

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