Solar seawater desalination-power generation integrated device integrated with thermoelectric module

Abstract

The invention discloses a solar seawater desalination-power generation integrated device integrated with thermoelectric modules, which belongs to the technical field of solar heat utilization and comprises a distillation box, the rear wall of the distillation box is higher than the front wall of the distillation box, a glass cover plate is mounted at the top end of the distillation box, and a plurality of thermoelectric modules are laid on the outer side of the rear wall of the distillation box. Heat dissipation fins are laid at one end, far away from the distillation box, of the thermoelectric module, the heat dissipation fins are in threaded connection with the rear wall of the distillation box through screws, a partition plate is arranged at one end, close to the front wall, in the distillation box and divides the distillation box into a seawater tank and a fresh water tank, and a flow guide groove is formed in the inner side of the rear wall of the distillation box. According to the invention, condensation latent heat of water vapor is fully utilized for power generation, so that the yield of fresh water is improved, electric energy is obtained, gradient utilization of solar energy is realized, and the comprehensive utilization rate of solar energy is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of solar thermal utilization, and in particular relates to a solar seawater desalination-power generation combined device integrating a thermoelectric module. Background Art

[0002] Fresh water is an indispensable basic substance. Due to the small amount of fresh water reserves, uneven distribution, and the increased pollution and demand for water resources caused by industrial development, the supply of fresh water has become one of the key issues for human survival. Traditional seawater desalination technology has problems such as large installed capacity, high investment cost, and high energy consumption. It is not suitable for construction in isolated islands, long-distance ships and other areas. In these specific areas, the use of solar desalination has become a key way to solve the fresh water problem.

[0003] The solar disc still is the simplest desalination device, but the utilization rate of solar energy is low, resulting in low fresh water yield. In order to improve the fresh water yield, the Chinese patent with the authorization announcement number CN202016888U proposes a multi-stage disc solar still with a pleated condensation bottom surface. The device uses a solar collector to heat the fresh water in the hot water storage tank, thereby gradually heating the seawater on the top of the condensation disc, and the condensation latent heat of water vapor can be reused. The above method enhances the condensation process and improves the water production rate, but the utilization of the latent heat of vaporization of water vapor is incomplete, and the function is single, and it is impossible to achieve efficient cascade utilization of solar energy, resulting in a waste of energy quality. Summary of the invention

[0004] The object of the present invention is to provide a solar desalination-power generation combined device integrating thermoelectric modules to solve the deficiencies in the prior art.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is:

[0006] A solar desalination-power generation device with integrated thermoelectric modules comprises: a distillation box, wherein the rear wall of the distillation box is higher than the front wall, a glass cover is installed on the top of the distillation box, a plurality of thermoelectric modules are laid on the outer side of the rear wall of the distillation box, heat dissipation fins are laid on the end of the thermoelectric modules away from the distillation box, the heat dissipation fins are threadedly connected to the rear wall of the distillation box by screws, a partition is arranged inside the distillation box and at one end close to the front wall, the partition divides the distillation box into a seawater tank and a freshwater tank, and a guide groove is opened on the inner side of the rear wall of the distillation box.

[0007] Furthermore, the guide groove is arranged obliquely, and a guide groove outlet pipe is connected to the lowest point.

[0008] Furthermore, a seawater outlet pipe is provided at the bottom end of the side wall of the distillation box and at a position corresponding to the seawater tank, and a seawater inlet pipe is provided 5 cm above the seawater outlet pipe.

[0009] Furthermore, a fresh water outlet pipe is provided at the bottom end of the side wall of the distillation box and at a position corresponding to the fresh water tank.

[0010] Furthermore, the angle between the glass cover plate and the horizontal plane is 30-60°.

[0011] Furthermore, the inner side of the glass cover is coated with a hydrophilic material.

[0012] Furthermore, the bottom surface of the seawater tank is coated with a coating with high solar energy absorption rate.

[0013] Furthermore, the guide trough is higher than the seawater level.

[0014] Furthermore, the width of the fresh water tank is 1-2 cm.

[0015] Furthermore, the ratio of the heat absorption area at the bottom of the seawater tank to the total area of ​​the thermoelectric module is 5:1-20:1.

[0016] The solar desalination-power generation combined device with integrated thermoelectric modules provided by the present invention has the following advantages compared with the prior art:

[0017] The present invention fully utilizes the condensation latent heat of water vapor to generate electricity, which not only improves the yield of fresh water, but also obtains electric energy, realizes the cascade utilization of solar energy, and improves the comprehensive utilization rate of solar energy.

[0018] The invention has the advantages of simple structure, easy operation, low cost and no pollution, and can be applied in special environments such as ocean-going ships and remote mountainous areas, and has a wide development space in actual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 is an axonometric view of the present invention;

[0021] Figure 2 A top view of the present invention;

[0022] Figure 3 is a side view of the present invention;

[0023] Figure 4 It is a rear view of the present invention.

[0024] In the figure: 1-distillation box, 2-seawater outlet pipe, 3-seawater tank, 4-fresh water tank, 5-fresh water outlet pipe, 6-partition, 7-glass cover, 8-guide groove, 9-heat dissipation fin, 10-thermoelectric module, 11-seawater inlet pipe, 12-guide groove outlet pipe. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0026] refer to Figure 1-4 As shown, the present invention provides a solar desalination-power generation combined device with integrated thermoelectric modules, comprising: a distillation box 1, the rear wall of the distillation box 1 is higher than the front wall, a glass cover plate 7 is installed on the top of the distillation box 1, a plurality of thermoelectric modules 10 are paved on the outer side of the rear wall of the distillation box 1, and a heat dissipation fin 9 is paved on the end of the thermoelectric module 10 away from the distillation box 1, and the heat dissipation fin 9 is threadedly connected to the rear wall of the distillation box 1 by screws to clamp the thermoelectric module 10, and a partition 6 is provided inside the distillation box 1 and at one end close to the front wall, and the partition 6 divides the distillation box 1 into a seawater tank 3 and a freshwater tank 4, and a guide groove 8 is provided on the inner side of the rear wall of the distillation box 1. Preferably, in addition to the heat dissipation fin 9 and the glass cover plate 7, other parts of the distillation box 1 are heat-insulated.

[0027] As a preferred embodiment, the guide groove 8 is arranged obliquely, and a guide groove outlet pipe 12 is connected to the lowest point.

[0028] As a preferred embodiment, a seawater outlet pipe 2 is provided at the bottom end of the side wall of the distillation box 1 and at a position corresponding to the seawater tank 3 , and a seawater inlet pipe 11 is provided 5 cm above the seawater outlet pipe 2 .

[0029] As a preferred embodiment, a fresh water outlet pipe 5 is provided at the bottom end of the side wall of the distillation box 1 and at a position corresponding to the fresh water tank 4 .

[0030] As a preferred embodiment, the angle between the glass cover plate 7 and the horizontal plane is 30-60°. This ensures that the condensed water flows smoothly to the bottom of the glass cover plate 7 and enters the fresh water tank 4. If the inclination angle is too small, the flow of the condensed fresh water is affected, and the condensed fresh water may directly fall into the sea water tank 3, reducing the fresh water yield. If the inclination angle is too large, the overall device volume is too large, the flexibility is affected, and the cost will also increase.

[0031] As a preferred embodiment, the inner side of the glass cover plate 7 is coated with a hydrophilic material, such as titanium dioxide, to prevent condensation from forming droplets that affect the transmission of sunlight.

[0032] As a preferred embodiment, the bottom surface of the seawater tank 3 is coated with a high solar absorption coating, such as carbon black, iron oxide, etc., and foamed metal or black metal debris, such as ferroferric oxide, etc., can also be added to the surface of the seawater tank 3 to enhance the absorption of solar energy and increase the evaporation rate of seawater. The seawater level in the seawater tank 3 should not exceed 2 cm to avoid affecting the transmission of solar energy.

[0033] As a preferred embodiment, the guide groove 8 is higher than the seawater level. Optimally, the guide groove 8 is located below the lowest position of the thermoelectric module 10 and higher than the seawater level.

[0034] As a preferred embodiment, the width of the fresh water tank 4 is 1-2 cm.

[0035] As a preferred embodiment, the ratio of the heat absorption area at the bottom of the seawater tank 3 to the total area of ​​the thermoelectric module 10 is 5:1-20:1. If the area of ​​the thermoelectric module 10 is too large, the temperature in the distillation box 1 is low due to the increase in the condensation area, the temperature difference between the cold and hot ends of the module is reduced, and the power generation of a single thermoelectric module 10 is reduced, so the cost will be higher. If the area of ​​the thermoelectric module 10 is too small, the temperature in the distillation chamber 1 is high and the heat dissipation loss is large.

[0036] The working principle of the present invention is:

[0037] The device is placed horizontally, with the glass cover plate 7 facing the sun, and the seawater tank 3 is filled with seawater about 2 cm deep. The seawater in the seawater tank 3 absorbs solar energy and evaporates, and the water vapor condenses into small water droplets on the inner side of the glass cover plate 7. After the small water droplets merge, they flow along the inclined direction of the glass cover plate 7, and finally flow to the fresh water tank 4 and are collected through the fresh water outlet pipe 5. The thermoelectric module 10 is installed on the rear wall of the distillation box 1. Due to the heat dissipation effect of the heat dissipation fins 9, the water vapor will condense on the inner wall surface of the distillation box 1 that the hot end of the thermoelectric module 10 contacts, and release heat at the same time, generating a temperature difference at both ends of the thermoelectric module 10 to power external equipment. The condensed water flows into the guide groove 8 along the rear wall of the distillation box 1, and is finally collected through the guide groove outlet pipe 12. Due to the addition of the thermoelectric module 10 and the heat dissipation fins 9, the condensation area is increased, thereby improving the fresh water yield.

[0038] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0039] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0040] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A solar desalination-power generation device integrating thermoelectric modules, characterized in that: include: A distillation box (1), wherein the rear wall of the distillation box (1) is higher than the front wall, a glass cover plate (7) is installed at the top of the distillation box (1), a plurality of thermoelectric modules (10) are laid on the outer side of the rear wall of the distillation box (1), a heat dissipation fin (9) is laid on the end of the thermoelectric module (10) away from the distillation box (1), and the heat dissipation fin (9) is threadedly connected to the rear wall of the distillation box (1) by screws, a partition (6) is arranged inside the distillation box (1) and at one end close to the front wall, and the partition (6) divides the distillation box (1) into a seawater tank (3) and a freshwater tank (4), and a guide groove (8) is opened on the inner side of the rear wall of the distillation box (1).

2. A solar desalination-power generation device with integrated thermoelectric modules according to claim 1, characterized in that: The guide groove (8) is arranged obliquely, and a guide groove outlet pipe (12) is connected at the lowest point.

3. A solar desalination-power generation device with integrated thermoelectric modules according to claim 1, characterized in that: A seawater outlet pipe (2) is arranged at the bottom end of the side wall of the distillation box (1) and at a position corresponding to the seawater tank (3), and a seawater inlet pipe (11) is arranged 5 cm above the seawater outlet pipe (2).

4. The solar desalination-power generation device with integrated thermoelectric modules according to claim 1, characterized in that: A fresh water outlet pipe (5) is provided at the bottom end of the side wall of the distillation box (1) and at a position corresponding to the fresh water tank (4).

5. The solar desalination-power generation device with integrated thermoelectric modules according to claim 1, characterized in that: The angle between the glass cover plate (7) and the horizontal plane is 30-60°.

6. A solar desalination-power generation device with integrated thermoelectric modules according to claim 1, characterized in that: The inner side of the glass cover plate (7) is coated with a hydrophilic material.

7. The solar desalination-power generation device with integrated thermoelectric modules according to claim 1, characterized in that: The bottom surface of the seawater tank (3) is coated with a coating with high solar energy absorption rate.

8. The solar desalination-power generation device with integrated thermoelectric modules according to claim 1, characterized in that: The guide groove (8) is higher than the seawater level.

9. The solar desalination-power generation device with integrated thermoelectric modules according to claim 1, characterized in that: The width of the fresh water tank (4) is 1-2 cm.

10. The solar desalination-power generation device with integrated thermoelectric modules according to claim 1, characterized in that: The ratio of the heat absorption area at the bottom of the seawater tank (3) to the total area of ​​the thermoelectric module (10) is 5:1-20:1.

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