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Photo-thermal interface evaporator and preparation method and application thereof

An evaporator and interface technology, applied in the field of photothermal interface evaporator and its preparation, can solve the problems of heat dissipation and inability to be effectively utilized by interface evaporation, so as to reduce heat dissipation, increase evaporation rate and energy efficiency, and improve The effect of heat buildup

Pending Publication Date: 2022-05-17
天津海特热管理科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inherent thermal diffusion, thermal radiation and other behaviors of materials, the heat converted by photothermal materials will inevitably be dissipated into the surrounding environment and materials.
Water is widely distributed in the photothermal interface evaporation system, and the thermal conductivity of water is as high as 0.6 W / mK. Therefore, a large part of the heat will be transferred from the photothermal material to the wetted hydrophilic material and water body through thermal diffusion, and cannot be absorbed by the interface. Efficient use of evaporation

Method used

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  • Photo-thermal interface evaporator and preparation method and application thereof
  • Photo-thermal interface evaporator and preparation method and application thereof
  • Photo-thermal interface evaporator and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Cut the upper surface of a rectangular parallelepiped melamine foam (5cm × 5cm × 3cm) into an array of pyramidal protrusions, and the number of pyramidal protrusions is 5 × 5 ( figure 1 ), the height of the pyramid is about 1.5cm. figure 1 It is a digital photo of the melamine foam base with pyramidal protrusion array prepared in Example 1 of the present invention.

[0048] Mix 50g of graphene oxide aqueous dispersion with a concentration of 1wt%, 2.5g of carbon fiber, and 32.5g of deionized water evenly, mix at high speed for 10min, spread it on the PET base film and dry it to prepare a photothermal film. Fig. 2 is a digital photo of the dried photothermal film prepared in Example 1 of the present invention.

[0049] Fill the array of melamine foam pyramidal protrusions with water, cut the photothermal film to a suitable size, wet the surface with water, then place the photothermal film on the array, press lightly to make the two fit tightly, and form a photothermal i...

Embodiment 2

[0054] Cut the upper surface of a piece of cuboid polyvinyl alcohol foam into a triangular bar convex array, the size of the foam is 5cm×4cm×2cm, and the height of the protrusion is about 1cm. Figure 6 It is a digital photo of the polyvinyl alcohol foam triangular bar protrusion array prepared in Example 2 of the present invention.

[0055] 30g of copper nanowire aqueous dispersion with a concentration of 2wt% and 10g of polyaniline aqueous dispersion with a concentration of 2% were uniformly mixed by high-speed shearing, and then spread on a PTFE film to dry to prepare a photothermal film.

[0056] Absorb the protruding array of polyvinyl alcohol foam triangular strips with water, cut the photothermal film into a suitable size, wet the surface with water, then place the photothermal film on the array, press lightly to make the two fit tightly, and form a photothermal interface evaporator. With pure water as the evaporation object, at 1kw / m 2 The evaporation performance of ...

Embodiment 3

[0058] Cut the upper surface of a rectangular parallelepiped polyurethane sponge into an array of irregular protrusions, the size of the foam is 6cm×5cm×3cm, and the height of the protrusions is about 1.5cm. Figure 7 It is a digital photo of the polyurethane sponge special-shaped protrusion array prepared in Example 3 of the present invention.

[0059] 5 g of carbon black and 20 g of polypyrrole dispersion with a concentration of 1% were uniformly mixed by high-speed shearing, and then spread on a polypropylene film to dry to prepare a photothermal film.

[0060] Absorb the polyurethane sponge special-shaped convex array with water, cut the photothermal film into a suitable size, wet the surface with water, then place the photothermal film on the array, press lightly to make the two fit tightly, and form a photothermal interface evaporator . Taking seawater as evaporation object, at 1kw / m 2 The evaporation performance of the photothermal interface was tested under the simul...

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Abstract

The invention discloses a photo-thermal interface evaporator and a preparation method and application thereof. The photo-thermal interface evaporator comprises a base, the base is a hydrophilic base and is provided with a bearing face, and the bearing face is the upper surface of a plurality of sharp protrusions distributed in an array mode; and the photo-thermal film is positioned on the bearing surface. According to the photo-thermal interface evaporator, the total area of the bearing face is controlled through the sharp protrusions distributed in the array mode, the contact area between the base and the photo-thermal film can be greatly reduced, heat conduction from the photo-thermal film to the base is effectively reduced, and the photo-thermal interface evaporator with low heat dissipation and high heat accumulation is formed. Compared with a conventional evaporator, the photo-thermal interface evaporator has the advantages that heat dissipation is effectively inhibited, heat accumulation is improved, the evaporation rate and energy efficiency of a photo-thermal interface evaporation system are improved, and the evaporation rate can be increased by 10-100%.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a photothermal interface evaporator, a preparation method and application thereof. Background technique [0002] Water resource crisis and water pollution are major issues facing contemporary society. A series of methods to produce clean fresh water have been developed, such as multi-stage flash seawater desalination, reverse osmosis process and nanofiltration technology. Improving the energy efficiency of clean fresh water production and reducing energy consumption are frontier issues of global concern. [0003] Solar energy is the most widely sourced and most sustainable renewable energy, with the advantages of easy access, abundant reserves, and no pollution. In recent years, the photothermal interface evaporation technology driven by solar energy can produce clean fresh water from seawater, salt water, brackish water, and polluted water, and has become one of the most concerned water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/08
CPCC02F1/048C02F1/08Y02A20/212
Inventor 包晨露马惠潇张松迪闵薇羽夏丽红
Owner 天津海特热管理科技有限公司
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