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Multi-effect vertical plate falling film solar desalination unit and method thereof

A technology of solar energy and seawater, which is applied in the field of solar desalination of seawater, can solve the problems of restricting the application and promotion of technology, low average daily fresh water production, and large area occupied by the device, so as to achieve fast evaporation start-up speed, improve solar energy utilization efficiency, and occupy an area small area effect

Inactive Publication Date: 2012-07-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The current solar desalination technology usually integrates solar heat collection and seawater distillation and desalination, which is easy to operate and maintain, but the device occupies a large area, slow to start, and low water production per unit area, which is greatly affected by the region and climate conditions. The daily fresh water production is low, which seriously restricts the application and promotion of its technology

Method used

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  • Multi-effect vertical plate falling film solar desalination unit and method thereof
  • Multi-effect vertical plate falling film solar desalination unit and method thereof
  • Multi-effect vertical plate falling film solar desalination unit and method thereof

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Embodiment 1

[0029] The length and width of the mirror and each metal partition are 0.5×0.7m, the parallel distance between the glass plate and the solar energy absorption surface is 10mm, the parallel distance between each adjacent metal partition is 5mm, and the absorption rate of the solar energy absorption surface is 0.9, The emissivity of the solar absorbing surface is 0.3, the reflectivity of the reflector is 0.8, and there are ten evaporation and condensation chambers (n=10). In late March in Hangzhou (30.3° north latitude, 120.2° east longitude), adjust the reflector so that the angle between it and the horizontal plane is fixed at 10°, and place the device in the direction of 50° south by east according to the normal vector of the solar absorption surface before 12:00 noon At 12 o’clock, turn the device so that the normal vector of the solar energy absorbing surface is placed in the direction of 50° due south by west. The experimental results show that the fresh water output per un...

Embodiment 2

[0031] The length and width of the mirror and each metal partition are 0.5×0.7m, the parallel distance between the glass plate and the solar energy absorption surface is 10mm, the parallel distance between each adjacent metal partition is 5mm, and the absorption rate of the solar energy absorption surface is 0.9, The emissivity of the solar absorbing surface is 0.3, the reflectivity of the reflector is 0.8, and there are ten evaporation and condensation chambers (n=10). In late June in Hangzhou (30.3° north latitude, 120.2° east longitude), adjust the reflector so that the angle between it and the horizontal plane is fixed at 17°. Before 12:00 noon, the device is placed according to the normal vector of the solar energy absorption surface to the direction of 85° south by east , Turn the device at 12 o'clock so that the normal vector of the solar energy absorbing surface is placed in the direction of 85° due south by west. The experimental results show that the fresh water outpu...

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Abstract

The invention discloses a multi-effect vertical plate falling film solar desalination unit and a method thereof. The device body consists of a seawater storage tank, metal clapboards, sealing rubber, a high concentration seawater storage tank, a fresh water storage tank, pulleys, a reflector, a glass plate and liquid absorbing cotton cloth. The direct radiation, scattering radiation and reflecting radiation of the sun are absorbed by a solar absorption surface and are converted into heat, the heat is absorbed by seawater uniformly distributed in the liquid absorbing cotton cloth for falling film evaporation, generated vapor is condensed into fresh water on a condensing surface, released latent heat is absorbed by the next effect of seawater, and the latent heat is repeatedly used to improve the fresh water yield in a unit daylighting area. Except solar energy, fuels and motors are not required, and the device is simple in structure, convenient to operate, high in start speed and high in water yield, and is particularly suitable for sea islands, deserts, ships and remote areas lacking electricity.

Description

technical field [0001] The invention relates to a multi-effect vertical plate falling film solar seawater desalination device and a method thereof, belonging to the technical field of solar seawater desalination. Background technique [0002] The ocean covers 71% of the earth's surface area, with seawater reserves of about 1.37 billion cubic kilometers, accounting for 95% of the world's total water; terrestrial freshwater reserves of about 35 million cubic kilometers, accounting for 2.53% of the global water reserves. The fresh water used only accounts for 0.266% of the fresh water reserves, which is less than 7 / 100,000 of the earth's total water storage. my country has a long coastline, and many islands, coastal areas and inland brackish water areas have serious fresh water shortages. Therefore, the development of seawater desalination technology has far-reaching strategic significance to alleviate the current shortage of freshwater resources and the prominent contradictio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/08C02F1/14C02F103/08
CPCY02A20/124Y02A20/142Y02A20/212
Inventor 肖刚倪明江骆仲泱高翔岑可法方梦祥周劲松施正伦程乐鸣王勤辉王树荣余春江
Owner ZHEJIANG UNIV
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