A high-efficiency condensing tubular solar water and electricity cogeneration device

Abstract

The application relates to the technical field of solar seawater desalination, in particular to a high-efficiency condensing tubular solar water and electricity cogeneration device. The device comprises a solar evaporation mechanism, which comprises a support and a flexible solar cell panel arranged on the support, and further comprises a transmission layer arranged in the support; a bearing mechanism, which comprises a floating member arranged on the support, and the bottom end of the transmission layer is provided with an extension part penetrating through the floating member; a water vapor condensation and collection mechanism, which comprises a water-blocking and air-permeating layer arranged in the transmission layer, a collecting member and a condensing member arranged on the floating member, and further comprises a conveying pipe arranged on the collecting member; and the three-dimensional tubular structure is used as an evaporation interface to replace the traditional two-dimensional plane structure, so that the steam condensation and collection rate and the evaporation efficiency of the device are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar seawater desalination, in particular to a high-efficiency condensation tubular solar water and electricity cogeneration device. BACKGROUND

[0002] With the rapid growth of population and the rapid development of economy, the demand for fresh water is increasing. Seawater desalination is one of the important technologies to solve the shortage of water resources, but traditional seawater desalination technologies such as reverse osmosis and multi-stage flash evaporation not only have large devices and complex structures, but also have high operating costs, which are difficult to popularize and apply in remote and underdeveloped areas. Solar water and electricity cogeneration technology is an effective way to solve this problem, among which solar interfacial evaporation is a low-cost, flexible configuration, low-carbon and environmentally friendly seawater desalination technology, which can achieve zero carbon emission and high freshwater collection efficiency, and can be applied to the seawater desalination industry on a large scale.

[0003] The existing solar interfacial evaporation "water and electricity cogeneration" device usually performs interfacial evaporation on a two-dimensional plane. In the interfacial solar evaporation, high light absorption rate of the photothermal material can achieve wide spectrum absorption of solar energy, and convert the absorbed photon energy into heat at the air-water interface. The adiabatic layer is mainly used to prevent heat transfer to the bottom water body, and the embedded capillary channel can transport water to the hot evaporation surface to directly produce steam. The generated water vapor is usually collected above or below the evaporation interface to realize the process of preparing fresh water from seawater. However, in the process of two-dimensional seawater evaporation and water vapor condensation and collection, there are problems such as poor solar absorption rate, insufficient water supply, and low steam condensation and collection rate. At present, how to improve the seawater evaporation rate and the fresh water condensation and collection rate is the core point of the interfacial evaporation technology of seawater desalination. The existing measures to improve the seawater evaporation rate and the fresh water condensation and collection rate mainly include (1) using high-efficiency photothermal conversion materials; (2) designing a water transport layer with excellent water storage performance; (3) designing a reasonable heat management structure; although the application of photothermal materials in interfacial solar evaporation technology can effectively improve the photothermal utilization efficiency, there are still other forms of energy loss in the application process; in the process of fresh water collection, there are not enough binding sites for water vapor; solar panels generate a large amount of heat and a certain amount of electricity during photothermal conversion, but the power generation will be inhibited as the temperature rises, in addition, the problem of water vapor escape in the evaporation process has not been well solved, which is not conducive to the scaling and practicality of the technology.

[0004] Therefore, the person skilled in the art is committed to developing a high-efficiency condensing tubular solar water and electricity cogeneration device, which can realize efficient condensation and collection of water vapor by using a tubular structure; by replacing the traditional interface evaporation layer with a two-component water transmission layer as the evaporation part, the water supply capacity and water storage capacity of the device are improved; at the same time, the traditional light and heat material is replaced by a flexible solar cell panel, which can fully utilize solar energy to produce abundant electric energy while producing fresh water, realizing "water and electricity cogeneration". The device has the advantages of high efficiency, energy saving, clean and environmental protection, etc. SUMMARY

[0005] In view of the above or existing problems in the prior art, the present application is proposed, and the technical problem to be solved by the present application is how to improve the water vapor condensation and collection efficiency and evaporation efficiency of the solar water and electricity cogeneration device through the overall and local structure design of the device. This process can also realize "water and electricity cogeneration".

[0006] Therefore, the purpose of the present application is to provide a high-efficiency condensing tubular solar water and electricity cogeneration device.

[0007] To solve the above technical problems, the present application provides the following technical scheme: a high-efficiency condensing tubular solar water and electricity cogeneration device, comprising a solar evaporation mechanism including a support and a flexible solar cell panel arranged on the support, and a transmission layer arranged in the support; a bearing mechanism including a floating member arranged on the support, the bottom end of the transmission layer being provided with an extension portion penetrating the floating member; a water vapor condensation and collection mechanism including a water-blocking and air-permeable layer arranged in the transmission layer, a collection member and a condensing member arranged on the floating member, and a conveying pipe arranged on the collection member; when the flexible solar cell panel performs light conversion, the heat generated by the light conversion is conducted through the support to evaporate water, and the evaporated water vapor is condensed by the condensing member and collected by the collection member.

[0008] As a preferred scheme of the high-efficiency condensing tubular solar water and electricity cogeneration device, wherein: the end of the condensing member penetrates the collection member and the floating member in sequence and extends to the inside of seawater; the condensing member is arranged in a spiral shape.

[0009] As a preferred scheme of the high-efficiency condensing tubular solar water and electricity cogeneration device, wherein: the transmission layer is made of a two-component needle-punched nonwoven fabric; the two-component needle-punched nonwoven fabric is made of hydrophilic ES fibers and hydrophobic PET fibers.

[0010] As a preferred scheme of the high-efficiency condensing tubular solar water and electricity cogeneration device, wherein: the ratio of the hydrophilic ES fibers and the hydrophobic PET fibers is 7:3.

[0011] As a preferred scheme of the high-efficiency condensation tubular solar water and electricity cogeneration device, the water-blocking and air-permeating layer is a water-blocking and air-permeating film.

[0012] As a preferred scheme of the high-efficiency condensation tubular solar water and electricity cogeneration device, the transmission layer and the water-blocking and air-permeating layer are bonded through a hot-pressing process.

[0013] As a preferred scheme of the high-efficiency condensation tubular solar water and electricity cogeneration device, the pressure during hot-pressing of the transmission layer and the water-blocking and air-permeating layer is 5 Mpa, and the temperature is 120 DEG C.

[0014] As a preferred scheme of the high-efficiency condensation tubular solar water and electricity cogeneration device, the cross section of the hydrophobic PET fiber is a triangular cross section.

[0015] As a preferred scheme of the high-efficiency condensation tubular solar water and electricity cogeneration device, the surface of the condensing component is subjected to chemical etching treatment, and the condensing component is arranged in a U shape.

[0016] As a preferred scheme of the high-efficiency condensation tubular solar water and electricity cogeneration device, the inner wall of the supporting component is provided with a spiral groove, and the outer surface of the supporting component is a cylindrical surface.

[0017] The high-efficiency condensation tubular solar water and electricity cogeneration device has the following advantages: the three-dimensional tubular structure is used to replace the traditional two-dimensional planar structure as the evaporation interface, thereby improving the steam condensation collection rate and the evaporation efficiency of the device; the seawater flows from bottom to top under the wicking action of the transmission layer, thereby realizing sufficient supply and storage of the seawater during the evaporation process; the device can generate electricity under illumination through the flexible solar cell panel, and the flexible solar cell panel can improve the evaporation temperature, reduce the heat loss, and improve the evaporation efficiency; in addition, the steam is efficiently condensed through the condensing component in the device, thereby greatly improving the steam condensation collection efficiency, and the device has the advantages of high efficiency, high yield, and easy scale production. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0019] Figure 1 It is a schematic diagram of the overall structure of the high-efficiency condensation tubular solar water and electricity cogeneration device.

[0020] Figure 2The internal structure diagram of the high-efficiency condensation tubular solar water and electricity cogeneration device.

[0021] Figure 3 The working principle diagram of the high-efficiency condensation tubular solar water and electricity cogeneration device.

[0022] Figure 4 The cross-sectional electron microscope image of the triangular hydrophobic PET fiber.

[0023] Figure 5 The planar electron microscope image of the triangular hydrophobic PET fiber.

[0024] Figure 6 The planar electron microscope image of the cross-shaped hydrophobic PET fiber.

[0025] Figure 7 The wicking imaging diagram of the triangular cross-section hydrophobic PET fiber in the hot-pressing experiment.

[0026] Figure 8 The wicking imaging diagram of the cross-section hydrophobic PET fiber in the hot-pressing experiment.

[0027] Figure 9 The wicking imaging diagram of the wicking material in the supplementary experiment.

[0028] Figure 10 The mass change diagram of the wicking material under 1 sunlight with different cross-sections and proportions.

[0029] Figure 11 The evaporation rate diagram of the wicking material under 1 sunlight with different cross-sections and proportions.

[0030] In the figure: 1, flexible solar cell panel; 2, support; 3, transmission layer; 31, extension; 4, water-blocking and air-permeable layer; 5, floating piece; 6, collecting piece; 7, condensing piece; 8, conveying pipe. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0032] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0033] Second, the "one embodiment" or "embodiments" referred to herein are intended to encompass a particular implementation of the present application, which can include a particular feature, structure, or characteristic. However, such a particular implementation can not be the only implementation to encompass the present application. Embodiments are described with additional specificity and detail to provide a thorough understanding of the present application. It will be understood that the description and specific examples themselves are not intended to limit the scope of the present application, but rather to exemplify the present application.

[0034] Embodiment 1, Reference Figures 1 to 3 For the first embodiment of the present application, the embodiment provides a high-efficiency condensing tubular solar water and electricity cogeneration device, which comprises a solar evaporation mechanism, which comprises a support 2 and a flexible solar cell panel 1 arranged on the support 2, and a transmission layer 3 arranged in the support 2; a bearing mechanism, which comprises a floating member 5 arranged on the support 2, and the bottom end of the transmission layer 3 is provided with an extension 31 penetrating the floating member 5; in this embodiment, the flexible solar cell panel 1 is used for light energy conversion, the transmission layer 3 performs wicking operation through the extension 31 thereon, absorbs seawater, the floating member 5 is a heat insulation foam, which is used for supporting the device and isolating the seawater, so that the support 2 can float and the heat loss is reduced by heat insulation.

[0035] A water vapor condensation collection mechanism, which comprises a water-blocking and air-permeable layer 4 arranged in the transmission layer 3, a collection member 6 and a condensing member 7 arranged on the floating member 5, and a conveying pipe 8 arranged on the collection member 6; the heat generated by the flexible solar cell panel 1 during light conversion is conducted through the support 2 to evaporate water, and the evaporated water vapor is condensed by the condensing member 7 and collected by the collection member 6; in this embodiment, the condensing member 7 can be arranged in a U shape, which can increase the contact area of the condensing member 7 and improve the condensing effect.

[0036] Specifically, the end of the condensing member 7 penetrates the collection member 6 and the floating member 5 in sequence and extends into the seawater; the condensing member 7 is arranged in a spiral shape, and in this embodiment, the bottom end of the condensing member 7 can be cooled by conduction after extending into the seawater, so that the condensing member 7 can maintain a relatively low temperature; the condensing member 7 is twisted in a spiral shape on the basis of the U shape, which can further increase the contact area of the condensing member 7 and the steam and improve the condensing efficiency and condensing effect.

[0037] Further, the support 2 and the condensing member 7 are made of one of brass, red copper, stainless steel, and glass material; in this embodiment, the support 2 and the condensing member 7 made of materials with good thermal conductivity can improve the evaporation efficiency and condensing efficiency of the device, thereby improving the water yield.

[0038] The inner wall of the support 2 is provided with a groove, and the groove is arranged in a spiral shape; in this embodiment, the groove can increase the area of the inner wall of the support 2, and the spiral arrangement can increase the area, so that the heat conduction efficiency is increased, the heat conduction efficiency of the flexible solar cell panel 1 is increased, the cooling effect of the flexible solar cell panel 1 is improved, and the evaporation efficiency is also improved.

[0039] Preferably, the outer surface of the support 2 is a cylindrical surface, in this embodiment, the support 2 is arranged in a cylindrical shape, and the flexible solar cell panel 1 attached to the outer wall of the support 2 is also arranged in a cylindrical shape, so that it can not be affected by time factors during use, and can maintain the maximum contact area with sunlight at any time, and the change of the height of the sun with time will not greatly affect the utilization rate of sunlight by the device, thereby maintaining a high power generation efficiency, and also achieving uniform heat conduction, improving the evaporation efficiency and the heat dissipation efficiency of the flexible solar cell panel 1.

[0040] Preferably, the length of the outermost flexible solar cell panel 1 is consistent with the circumference of the cylindrical support 2, and the width is consistent with the height of the cylindrical support 2, such a structure design can maximize the light absorption area and the heat conduction area, and maximize the effective light absorption area.

[0041] In summary, the use of a tubular structure realizes the condensation of steam from the periphery to the middle, and a three-dimensional tubular structure is used instead of a traditional two-dimensional planar structure as an evaporation interface, which improves the steam condensation collection rate and evaporation efficiency of the device, and at the same time, the seawater flows from bottom to top under the wicking action of the transmission layer 3, realizing sufficient supply and storage of seawater during the evaporation process. The device can generate electricity under light through the flexible solar cell panel 1 while performing photo-thermal conversion, and the flexible solar cell panel 1 can increase the evaporation temperature, reduce heat loss, and improve the evaporation efficiency. In addition, the device realizes efficient condensation of steam through the condensing member 7, thereby greatly improving the condensation collection efficiency of the steam, and has the advantages of high efficiency, high yield, easy scale-up production, etc.

[0042] The conductive adhesive is used between the flexible solar cell panel 1 and the support 2, which can make the flexible solar cell panel 1 and the outer wall of the support 2 tightly fit, and improve the heat conduction effect.

[0043] Further description of the working principle of the device is as follows Figure 1The flexible solar panel 1 generates electricity under sunlight. During operation, the flexible solar panel 1 produces heat, which is conducted to the support member 2. The support member 2 further conducts the heat. Since the extension 31 on the transmission layer 3 is located within seawater, it can extract seawater through wicking. The seawater absorbs heat and evaporates. The outer layer of the water-blocking and breathable layer 4 is an interface evaporation layer, and the inner layer is a freshwater collection area. The water-blocking and breathable layer 4 is a water-blocking and breathable membrane. Water vapor diffuses through the water-blocking and breathable membrane towards the condenser 7. Since the bottom end of the condenser 7 extends into the seawater, the seawater can maintain a relatively low temperature in the condenser 7 through heat conduction. (Refer to...) Figure 3 According to the second law of thermodynamics, heat will only spontaneously transfer from a hotter object to a colder object. Therefore, water vapor condenses and adheres to the condenser 7 when it encounters low temperature, changing from gaseous water vapor to liquid water. The water droplets then flow along the condenser 7 to the collector 6. The conveying pipe 8 connected to the collector 6 can transport and discharge the condensed water for easy collection. Since the heat of the flexible solar panel 1 is absorbed and conducted during operation, it will not inhibit power generation due to excessive temperature and can maintain a high power generation efficiency. This solar "hydropower cogeneration" device can improve the utilization rate of sunlight while using only clean energy, namely solar energy, without consuming other energy sources.

[0044] Example 2, refer to Figures 1 to 11 This is the second embodiment of the present invention. Unlike the previous embodiment, the transport layer 3 is made of a bicomponent needle-punched nonwoven fabric. The bicomponent needle-punched nonwoven fabric is made of hydrophilic ES fibers and hydrophobic PET fibers. In this embodiment, seawater is introduced into the device through the wicking effect of the transport layer 3, i.e., the bicomponent needle-punched nonwoven fabric. The material made of hydrophilic ES fibers and hydrophobic PET fibers has good wicking diffusion ability and can realize automatic water replenishment.

[0045] Specifically, the ratio of hydrophilic ES fiber to hydrophobic PET fiber is 7:3.

[0046] The preparation method of transport layer 3 is as follows: two short fibers with completely different hydrophilic and hydrophobic properties, namely hydrophilic ES fiber and hydrophobic PET fiber, are mixed, opened and combed according to a specific fiber raw material ratio, and then needle punched.

[0047] Furthermore, the water-blocking and breathable layer 4 is one of polypropylene, polyester, polyethylene spunbond fabric, or polypropylene spunbond fabric.

[0048] Preferably, the transport layer 3 and the water-blocking and breathable layer 4 are bonded together by a hot-pressing process.

[0049] Preferably, the pressure during hot pressing of the transmission layer 3 and the water-blocking and breathable layer 4 is 5 MPa and the temperature is 120°C.

[0050] In the present embodiment, the hot-pressing process takes advantage of the difference in melting points between the skin layer and the core layer of the ES fiber. After heat treatment, the skin layer of the ES fiber melts and plays a bonding role. This treatment makes the transmission layer 3 and the water-blocking and air-permeable layer 4 have good adhesion, so that they have good wicking performance when used as the interface evaporation layer for seawater interface evaporation.

[0051] It should be noted that the surface of the condensing member 7 is subjected to chemical etching treatment. The condensing member 7 is arranged in a spiral shape to increase the water vapor combination sites. In order to obtain better steam condensation and collection effect, the surface of the spiral-shaped condensing member 7 made of red copper is subjected to chemical etching treatment to further increase the water vapor combination sites. The chemical etching method used in the present embodiment can form a hydrophilic nanostructure on the surface of the condensing member 7.

[0052] The etching method of the condensing member 7 is as follows: first, immerse the condensing copper pipe in anhydrous ethanol and perform ultrasonic treatment for 5 minutes; then, immerse the condensing copper pipe in deionized water and perform ultrasonic treatment for 5 minutes; then, immerse the condensing copper pipe in 1M HCl and perform ultrasonic treatment for 5 minutes; after impurity removal, perform hydrophilic treatment by immersing the condensing copper pipe in a mixed solution of 2.5M NaOH and 0.13M (NH4)2S2O8 for 6-10 minutes. When blue substances appear on the surface of the condensing pipe, it is proved that the hydrophilic treatment is successful.

[0053] Preferably, the material of the condensing member 7 is red copper, and the copper content is >99%.

[0054] Further, the cross sections of the hydrophilic ES fiber and the hydrophobic PET fiber are cross-shaped, triangular, four-leaf-shaped, or hollow-shaped.

[0055] Hot-pressing experiment:

[0056] The hydrophobic PET fiber with a cross-shaped or triangular cross section is selected, and the ratio of the hydrophilic ES fiber to the hydrophobic PET fiber is 7:3. The transmission layer 3 and the water-blocking and air-permeable layer 4 are subjected to hot-pressing experiments under the following conditions. The specific experimental parameters are as follows:

[0057] Hot press temperature (°C) 80 80 100 100 120 120 Hot press strength (Mpa) 5 10 5 10 5 10

[0058] The experimental results are shown in Figure 7 and Figure 8 , wherein, Figure 7 the hydrophobic PET fiber has a triangular cross section, the ratio of the hydrophilic ES fiber to the hydrophobic PET fiber is 7:3, and the wicking performance is detected at the beginning, 1 minute, 5 minutes, and 10 minutes, Figure 8 the hydrophobic PET fiber has a cross-shaped cross section, the ratio of the hydrophilic ES fiber to the hydrophobic PET fiber is 7:3, and the wicking performance is detected at the beginning, 1 minute, 5 minutes, and 10 minutes.

[0059] For example, "5-120-cross" in the figure represents: the hot-pressing condition is 5Mpa pressure and 120℃ temperature; "cross" represents the hydrophobic fiber used is cross section, "triangle" represents the hydrophobic fiber used is triangle section, and the rest of the parameters are the same except the pressure, temperature and section.

[0060] The wicking results were characterized by using a thermal imager, and the experimental results showed that when the ratio of hydrophilic ES fiber and hydrophobic PET fiber was 7:3, the wicking performance was greatly improved after the hot-pressing process of 5Mpa and 120℃.

[0061] After the material absorbs water through wicking, the temperature of the material decreases, and the height of the blue water column on the thermal imager represents the wicking height. As shown in the experimental results, the wicking heights of "5-120-cross" and "5-120-triangle" are greater than those of the rest of the hot-pressing conditions in the same group and under the same wicking time, so the wicking results show that the best hot-pressing condition is 5Mpa and 120℃.

[0062] Supplementary experiments:

[0063] Different samples were tested with different grammage in the following table;

[0064] Sample (1) (2) (3) Gram weight (g / m2) 122.2 214.4 247.7

[0065] Samples with different ratios of hydrophilic ES fiber and hydrophobic PET fiber were tested in the following table;

[0066] Sample 1 2 3 4 5 Ratio 5:5 6:4 7:3 8:2 9:1

[0067] Reference Figure 9 Based on the hot-pressing experiment, considering that the highest hot-pressing temperature set is 120℃, the wicking performance of the material after hot-pressing above 120℃ is not discussed, so the wicking experiment of 140℃ hot-pressing temperature is supplemented.

[0068] For example, "(3)3cross140" in the figure represents: the wicking material with a sample grammage of 247.7g / m2, the ratio of hydrophilic ES fiber and hydrophobic PET fiber is 7:3, the section is "cross", and the hot-pressing temperature is 140℃; "(2)5triangle120" in the figure represents: the wicking material with a sample grammage of 214.4g / m2, the ratio of hydrophilic ES fiber and hydrophobic PET fiber is 9:1, the section is "triangle", and the hot-pressing temperature is 120℃.

[0069] From the "hot-pressing temperature" experiment, it can be concluded that when the hot-pressing temperature reaches 140℃, the wicking performance does not increase but decreases, so it is concluded that 120℃ is the best hot-pressing temperature to improve the wicking performance.

[0070] From the group of experiments of "determining section" and hot-pressing experiments, it can be concluded that the wicking performance of the wicking material with the hydrophobic fiber of the triangular section is better.

[0071] Since the hot-pressing experiment only discusses the wicking performance of the wicking material with the proportion of hydrophilic and hydrophobic fibers of 7:3, the influence of the proportion of hydrophilic and hydrophobic fibers on the wicking performance is supplemented. The experiment of "determining the proportion" shows that when the proportion of hydrophilic and hydrophobic fibers is 7:3, the wicking performance is the best.

[0072] From the group of experiments of "determining the grammage", it can be concluded that when the grammage of the wicking material is 122.2 g / m2 and 214.4 g / m2, the wicking effect is better. Considering the heat absorption and evaporation area of the wicking material, the wicking material with the grammage of 214.4 g / m2 is more suitable.

[0073] Proportion experiment of hydrophilic ES fiber and hydrophobic PET fiber:

[0074] Referring to Figure 10 which is a graph of the mass change of the wicking material with different sections and proportions under 1 sun light at an ambient temperature of 28℃, wherein C represents the wicking material with the cross section, T represents the wicking material with the triangular section, 5, 6, 7, 8 and 9 respectively represent the wicking material with the proportion of hydrophilic ES fiber and hydrophobic PET fiber of 5:5, 6:4, 7:3, 8:2 and 9:1, and from the graph, it can be concluded that when the proportion of hydrophilic ES fiber and hydrophobic PET fiber is 7:3 and the section is the triangular section, the mass loss under the sun light is the most. Figure 10

[0075] Referring to Figure 11 which is an evaporation rate graph of the wicking material with different sections and proportions under 1 sun light at a humidity of 64%, wherein C represents the wicking material with the cross section, T represents the wicking material with the triangular section, and from the graph, it can be concluded that when the proportion of hydrophilic ES fiber and hydrophobic PET fiber is 7:3, the evaporation rate of the material is the largest, and the evaporation rate of the triangular section is larger than that of the cross section.

[0076] Therefore, when the proportion of hydrophilic ES fiber and hydrophobic PET fiber is 7:3 and the section is the triangular section, the evaporation efficiency is the highest.

[0077] The rest of the structure is the same as that of Example 1.

[0078] Further illustrate the technical effect of the present application:

[0079] ​The interface evaporation device of the commonly used two-dimensional plane can only collect steam upward or downward in the evaporation process, and such a design not only inhibits the utilization rate of sunlight, but also reduces the water vapor collection efficiency; the three-dimensional cylindrical evaporation interface is adopted in the present application, water vapor can be condensed from the periphery to the central condensing device, which provides more combination sites for water vapor condensation and provides a new idea for the design of the steam condensing device.

[0080] The solar energy interface evaporation commonly uses a light-heat material as the light-absorbing material, and this method still consumes a certain amount of light-heat conversion material; and the flexible solar cell panel in the present application replaces the conventional light-heat material as the light-heat conversion material, which not only breaks out of the limitation of the type of traditional light-heat conversion material, but also generates electric energy while performing light-heat conversion, realizing "water and electricity cogeneration".

[0081] The water transport layer of the present application, i.e., the fiber-based material, uses one of cross-shaped, triangular, four-leaf-shaped and other special-shaped section fibers as raw materials, and the special-shaped section fibers are obtained by directly spinning using a spinneret with a cross-shaped and triangular fiber section shape; the non-woven fabric obtained by mixing and needling the special-shaped section fibers and ES fibers has a mass of about 215 grams per square meter, wherein the special-shaped section fiber raw material can provide more water transport channels and provide more space for the transportation and storage of seawater.

[0082] The fiber-based material, i.e., the water transport layer of the present application, is mixed with hydrophilic and hydrophobic fibers in a certain proportion, and the water transport layer formed by needling the hydrophilic and hydrophobic fibers in a suitable proportion can reduce the evaporation enthalpy in the evaporation process, thereby improving the evaporation performance of the material in the evaporation process.

[0083] The present application can be used in the fields of seawater desalination and sewage treatment, and the device has no other energy input except solar energy, and has unique advantages in low carbon and off-grid operation. The device realizes efficient evaporation and efficient condensation through a tubular structure, and the evaporation efficiency and condensation effect of distillation are enhanced based on the synergistic effect of the transmission layer 3 and the water-blocking and air-permeable layer 4 with large difference in hydrophilicity and hydrophobicity, the condensation efficiency is improved by using the spiral condensing element 7 for passive cooling, and the light absorption area is increased and the solar energy utilization efficiency is improved by using the flexible solar cell panel 1. Such a design that takes into account high evaporation efficiency and high condensation efficiency not only can greatly reduce the cost of fresh water production, but also can generate a certain amount of electric energy, which has important significance for the practical application of passive solar distillation technology.

[0084] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit it, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A high-efficiency condensing tubular solar-hydropower cogeneration device, characterized in that: include, A solar evaporation mechanism includes a support member (2) and a flexible solar panel (1) disposed on the support member (2), and a transmission layer (3) disposed within the support member (2). The support mechanism includes a floating member (5) disposed on the support member (2), and the bottom end of the transmission layer (3) is provided with an extension (31) penetrating the floating member (5). The water vapor condensation and collection mechanism includes a water-blocking and air-permeable layer (4) disposed in the transmission layer (3), a collection element (6) and a condensation element (7) disposed on the floating element (5), and a delivery pipe (8) disposed on the collection element (6). The heat generated by the flexible solar panel (1) during light conversion is conducted through the support member (2) to evaporate the water. The evaporated water vapor is condensed through the condenser (7) and collected through the collector (6). The transport layer (3) is made of a two-component needle-punched nonwoven fabric; The bicomponent needle-punched nonwoven fabric is made of hydrophilic ES fibers and hydrophobic PET fibers; The ratio of the hydrophilic ES fiber to the hydrophobic PET fiber is 7:3; The transport layer (3) and the water-blocking and breathable layer (4) are bonded together by a hot-pressing process; The pressure and temperature of the transmission layer (3) and the water-blocking and breathable layer (4) during hot pressing are 5 MPa and 120°C. The outer surface of the support member (2) is a cylindrical surface.

2. The high-efficiency condensing tubular solar-hydropower cogeneration device as described in claim 1, characterized in that: The end of the condenser (7) passes through the collector (6) and the float (5) in sequence and extends into the interior of the seawater; The condenser (7) is arranged in a spiral shape.

3. The high-efficiency condensing tubular solar-hydropower cogeneration device as described in claim 1 or 2, characterized in that: The water-blocking and breathable layer (4) is a water-blocking and breathable membrane.

4. The high-efficiency condensing tubular solar-hydropower cogeneration device as described in claim 3, characterized in that: The hydrophobic PET fiber has a triangular cross-section.

5. The high-efficiency condensing tubular solar-hydropower cogeneration device as described in claim 4, characterized in that: The surface of the condenser (7) is chemically etched. The condenser (7) is U-shaped.

6. The high-efficiency condensing tubular solar-hydropower cogeneration device as described in claim 5, characterized in that: The inner wall of the support member (2) is provided with grooves, and the grooves are arranged in a spiral shape.

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