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Solar evaporator with hollow structure, and preparation method and application thereof

A solar evaporator and hollow technology, which is applied in the field of solar evaporator and its preparation, can solve the problems of difficult heat insulation materials, etc., and achieve the effect of stable product shape and structure, simple process, and favorable absorption

Active Publication Date: 2020-05-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the heat insulation layer is mostly assembled into the evaporator with materials with low thermal conductivity, but the air with extremely low thermal conductivity is difficult to be directly used as a heat insulation material due to the complexity of its introduction.

Method used

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  • Solar evaporator with hollow structure, and preparation method and application thereof
  • Solar evaporator with hollow structure, and preparation method and application thereof
  • Solar evaporator with hollow structure, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A hollow protruding melamine formaldehyde resin foam-based solar evaporator is prepared according to the following steps:

[0027] Take 45 mg of graphene powder and add it to 15 ml of deionized water, and ultrasonically treat it for 30 minutes to make it uniformly dispersed; add 140 mg of potassium hydroxide crystals to the above-mentioned graphene aqueous suspension, and mechanically stir for 5 minutes to prepare a uniform slurry; Take 15ml of slurry and melamine formaldehyde resin foam and place it in the lining of the hydrothermal reaction kettle, place the lining of the reaction kettle in the reaction kettle, and react at 180°C for 5 hours under airtight conditions; then take out the product after cooling down in the air environment, Obtain solar evaporator sample 1 after freeze-drying, its interior is hollow structure, exterior is two-layer structure and shell surface is protruding (referring to figure 1 and figure 2 ); the thickness of the polymer skeleton in th...

Embodiment 2

[0034] A hollow protruding melamine formaldehyde resin foam-based solar evaporator is prepared according to the following steps:

[0035] Get 45 mg of graphene powder and add it to 15 ml of deionized water, and ultrasonically treat it for 30 minutes to make it uniformly dispersed; add 102 mg of sodium hydroxide crystals to the above-mentioned graphene aqueous suspension, and mechanically stir for 5 minutes to prepare a uniform slurry; Take 15ml of slurry and polyurethane foam and put them in the lining of the hydrothermal reaction kettle, place the lining of the reaction kettle in the reaction kettle, and react at 180°C for 5 hours; take out the product after cooling down in the air environment, and obtain multi-layer after freeze-drying Structure of hollow convex solar evaporator sample 2.

[0036] The evaporation performance of the material is tested under the irradiation of simulated sunlight; sample 2 is exposed to a simulated sunlight (1KW m -2 ) can get 1.378kg m -2 h ...

Embodiment 3

[0038] A hollow protruding polyurethane foam-based solar evaporator is prepared according to the following steps:

[0039] Take 45 mg of graphene powder and add it to 15 ml of deionized water, and ultrasonically treat it for 30 minutes to make it uniformly dispersed; add 140 mg of potassium hydroxide crystals to the above-mentioned graphene aqueous suspension, and mechanically stir for 5 minutes to prepare a uniform slurry; Take 15ml of slurry and polyurethane foam and put them in the lining of the hydrothermal reaction kettle, place the lining of the reaction kettle in the reaction kettle, and react at 200°C for 3 hours; take out the product after cooling down in the air environment, and obtain multi-layer after freeze-drying Structure of hollow convex solar evaporator sample 3.

[0040] The evaporation performance of the material was tested under the irradiation of simulated sunlight; sample 3 was tested under the irradiation of simulated sunlight (1KW m -2 ) can get 1.280k...

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Abstract

The invention belongs to the technical field of polymer composite materials, and particularly relates to a solar evaporator with a hollow structure and a preparation method and application thereof. According to the solar evaporator provided by the invention, the interior of the solar evaporator is of a hollow structure, the exterior of the solar evaporator is a shell layer of a two-layer structure, and the two-layer structure is composed of a porous polymer skeleton inner layer and an outer layer formed by a photo-thermal material. Under the irradiation of simulated sunlight (wherein one sunlight intensity is 1 KW / m<2>), the maximum value of the evaporation rate of the solar evaporator can reach 1.476 kg / m<2> / h, and the maximum value of the evaporation efficiency of the solar evaporator can reach 92.9%.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a solar evaporator with a hollow structure and a preparation method and application thereof. Background technique [0002] In recent years, the problem of lack of water resources has become more and more significant. By 2030, people's demand for fresh water will reach 6.9 trillion cubic meters per year. Although 70% of the earth's surface is covered by water, only 2.5% of the water is fresh water, and 87% of this fresh water is located in the polar ice caps and alpine glaciers, which are difficult for humans to use. Solar energy is a clean and renewable energy source. Using solar energy to heat water to generate water vapor, desalinate seawater or treat sewage can obtain clean water resources. [0003] Solar-to-thermal energy conversion technology is a technology that directly harvests solar energy for energy storage and heat generation. So far, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C02F103/08
CPCC02F1/14C02F2103/08Y02A20/212
Inventor 杨伟孟森赵星包睿莹柯凯刘正英杨鸣波
Owner SICHUAN UNIV
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