Solar seawater desalination and distillation system for recovering latent heat of condensation and working method

Abstract

The invention relates to a seawater distillation system, in particular to a solar seawater desalination distillation system for recovering latent heat of condensation and a working method. The system comprises a solar heat collection device, a distillation device, a photovoltaic energy storage device and a thermoelectric device, wherein the distillation device comprises a distilled water tank, a condenser and a distilled water collecting tank; the thermoelectric device comprises a thermoelectric heat pump and a water cooling plate; wherein a hot end water cooling plate of the thermoelectric heat pump is communicated into the distilled water tank through a heat delivery pipe, and a cold end water cooling plate is communicated into the condenser through a cold water delivery pipe; the solar heat collection device is connected with the distillation device; the photovoltaic energy storage device is in power supply connection with the thermoelectric device; According to the invention, the distillation system fully recovers condensation latent heat of water vapor at the condenser, is used for heating seawater, improves the energy utilization efficiency of the system, can normally work when the sun illumination is insufficient or at night, and overcomes the defect of solar energy intermittency. The system can be operated off line, and is suitable for islands or remote areas which are short of fresh water resources and are far away from national energy networks.

Description

technical field [0001] The invention relates to a seawater distillation system, in particular to a solar seawater desalination distillation system and a working method for recovering condensation latent heat. Background technique [0002] According to statistics from the United Nations, as of 2021, about 4 billion people in the world will face water shortage problems; it is estimated that by 2050, the supply of fresh water in more than 500 cities will be reduced by 10%, affecting nearly 685 million people. my country is also facing the problem of water shortage, and the per capita water resources are about 2100 m 3 , which is only 28% of the world's average level; at the same time, my country's water resources are unevenly distributed and do not match the level of population and economic development. Problems such as water resource waste and water pollution have exacerbated the crisis of fresh water resources, and my country's coastal areas are also facing Water stress probl...

AI Technical Summary

Problems solved by technology

The disadvantages of the current desalination system include: during distillation, the water vapor generated is directly condensed at the condenser, and the latent heat of condensation of the water vapor is not recycled, but is lost to the atmosphere

At the same time, due to the low density and instability of solar energy, the system is vulnerable to weather changes and cannot continue to produce fresh water.

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