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Device for realizing sea water desalination through space radiation refrigeration

A radiative refrigeration and space technology, applied in the fields of renewable energy and seawater desalination, can solve the problems of the solar still being difficult to produce fresh water, reducing the driving force for mass transfer of the solar still, and increasing the temperature of the cover plate, so as to achieve a good social and economic Benefit, small footprint, improve the effect of mass transfer temperature difference

Inactive Publication Date: 2015-03-25
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional disc solar still uses a transparent cover above the device as a condenser. Although this makes the device simpler, it also has disadvantages. When water vapor condenses, latent heat is released to increase the temperature of the cover, and the cover absorbs A certain amount of solar radiation increases the water vapor partial pressure near the cover plate, reduces the water vapor partial pressure difference between the evaporation surface and the condensation surface, reduces the mass transfer driving force of the solar still, and makes the water production only It is 3-4kg / (d·㎡), which greatly limits its application range
In addition, it is difficult for solar stills to produce fresh water at night or when solar irradiance is low

Method used

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  • Device for realizing sea water desalination through space radiation refrigeration
  • Device for realizing sea water desalination through space radiation refrigeration
  • Device for realizing sea water desalination through space radiation refrigeration

Examples

Experimental program
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Effect test

Embodiment 1

[0068] The second device for realizing desalination of seawater by using space radiation refrigeration includes an evaporation box 3, and the outer surface of the evaporation box 3 excluding the top plate 2 is provided with a thermal insulation layer, and the thermal insulation layer is polystyrene foam; the evaporation box 3 The length, width, and height are 2000mm, 1000mm, and 200mm respectively, and the thickness of the insulation material layer is 20mm; a cover plate 1 is arranged above the top plate 2 of the evaporation box 3, and the front support plate, The rear support plate 17 is fixedly connected to form the air channel 18, and the left baffle plate 19 and the right baffle plate 20 are movably connected with the left port and the right port of the air channel 18 respectively; when the ambient air temperature is lower than the temperature of the top plate 2, the left baffle plate 19. The right baffle plate 20 is opened, and the temperature of the cover plate is lowered...

Embodiment 2

[0071] The device of the present invention for realizing seawater desalination by using space radiation refrigeration can also be combined with solar heat collectors or other waste heat sources to increase the temperature of seawater and increase the water production per unit radiation area, image 3 A system for desalination of seawater by utilizing space radiative cooling combined with solar energy.

[0072] Wherein the device utilizing space radiation refrigeration to realize desalination of seawater is the device of embodiment 1.

[0073] Use the solar heat collector 11 to heat the seawater in the raw water tank 12 to 50-60°C, open the valve 13, and the raw water enters the seawater desalination device using space radiation cooling at a flow rate of 2kg / (㎡h), and the water production is 8- 12kg / (㎡d).

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Abstract

The invention discloses a device for realizing sea water desalination through space radiation refrigeration. The device comprises an evaporation tank body 3, wherein a cover plate 1 is arranged above a top plate 2 of the evaporation tank body 3, the top plate 2 and the cover plate are fixedly connected via a front supporting plate and a back supporting plate to form an air passage 18, and a left baffle plate 19 and a right baffle plate 20 are respectively and movably connected with a left end opening and a right end opening of the air passage 18; a raw material water inlet is formed in the lower part of a left side plate of the evaporation tank body 3, a catch basin 8 and a product water outlet 9 are formed in the upper part of a right side plate of the evaporation tank body, and a strong brine outlet 7 is formed in the lower part of the right side plate of the evaporation tank body 3; the evaporation tank body 3 inclines to the right. The device is simple in structure, reliable in operation, high in mobility and convenient to mount and maintain; specially-assigned people are not needed for guard, power equipment is not needed, normal-temperature sea water can be used for producing fresh water at night or under the condition of lower solar irradiance, and the device is suitable for remote areas, such as islands with scarce fresh water and electric power, and fresh water demand under emergency condition.

Description

technical field [0001] The invention belongs to the technical field of renewable energy and seawater desalination, and relates to a device for realizing seawater desalination by space radiation refrigeration. technical background [0002] Water is the source of all life. With the continuous development of industry and agriculture and the rapid growth of population, the demand for fresh water will increase sharply. The shortage of fresh water will be a serious problem that many countries will face in the future. Especially in some islands and remote saltwater lake areas, most of the water resources are seawater or brackish water, there is a serious shortage of freshwater, and energy supply is also relatively difficult. Therefore, using solar energy and other renewable energy sources for seawater desalination is an important way to solve the problem of fresh water shortage in these areas. The solar distiller is favored by users because of its simple structure, convenient mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/04C02F103/08
CPCY02A20/124
Inventor 任建波齐春华冯厚军吕庆春苗超楚树坡
Owner TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI