Seawater desalination system and process based on nanometer fluid phase-change cold accumulation and solar energy driving

Abstract

The invention relates to the technical field of seawater desalination and specifically relates to a seawater desalination system based on nanometer fluid phase-change cold accumulation and solar energy driving. The system comprises a heat collecting unit, a low-temperature multi-effect distilling unit, a refrigeration unit and a cold accumulation unit, wherein the heat collecting unit is used for supplying a heat source to the low-temperature multi-effect distilling unit; the cold accumulation unit is used for cooling a high-temperature material which flows by the low-temperature multi-effect distilling unit; the cold energy of the cold accumulation unit is supplied by the refrigeration unit. The invention discloses a seawater desalination process which utilizes the system. According to the system provided by the invention, the night low-cost off-peak electric power resource is converted into high-quality cold energy and then is stored by the refrigeration unit and the phase-change cold accumulation device; the heat energy in a solar energy heat collector is transferred to the raw material seawater by the nanometer fluid so that the seawater can evaporate; the phase-change cold accumulation device can supply the cold load required by steam devaporation; the problem of cold load dynamic matching of the solar seawater desalination device is solved; the seawater desalination cost is lowered; the function of peak shifting and valley filling of the power grid load can be achieved; the electricity efficiency is increased; the environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to a system and process for desalination of seawater based on nanofluid phase change cold storage and solar energy. Background technique [0002] The world's fresh water resources are being depleted, which has become one of the great threats to human development and survival. Seawater desalination, as an open source technology, has become an effective way for human beings to alleviate the fresh water crisis. At present, the practical application of seawater desalination technology mainly includes distillation and reverse osmosis membrane. The high and high temperature distillation is easy to scale, which has become an absolute dominant technology in thermal seawater desalination. [0003] As we all know, solar energy is a clean and environmentally friendly energy source, rich in resources, inexhaustible and inexhaustible. Scientists from all over the world have been ...

AI Technical Summary

Problems solved by technology

Solar energy has the disadvantages of low energy density, intermittent and unstable sunlight, etc., resulting in unstable steam production in solar desalination devices, resulting in unnecessary waste of cooling and power consumption

Images