Seawater desalination system and control method for vertical axis seawater desalination system with offshore wind aerodynamic suspension

Abstract

The invention discloses an offshore wind pneumatic suspension vertical shaft seawater desalination system and a control method thereof. The offshore wind pneumatic suspension vertical shaft seawater desalination system comprises vertical shaft wind turbines, compressed air energy storing devices, air flotation damping devices and a seawater desalination device. Frictional damping of draught fans and tower frames are regulated by adopting a four-point pneumatic suspension mode, a high-pressure pump, compressors and a reverse osmosis membrane assembly are switched according to the capturing power, the fresh water requirement, the compression power and the high-pressure pump power, and the compressed air energy storing devices and high-pressure seawater storing devices are roughly and finelyregulated on the basis of rotor magnetic chain orienteering and permanent magnet generator electromagnetic torque regulating; and a mixed energy storing mode of compressed air, a high-pressure water tank and a storage battery is adopted, therefore, seawater desalination in multiple working modes such as draught fan pneumatic suspension, air floatation capturing, air floatation water storing and gas storing and damping regulating is achieved, and the wind energy utilization efficiency, the seawater desalination efficiency and the membrane desalination life are cooperatively improved. Through effective implementation of the offshore wind pneumatic suspension vertical shaft seawater desalination system and the control method thereof, real practicability of offshore wind power and seawater desalination can be greatly promoted.

Description

technical field [0001] The invention relates to a wind-powered seawater desalination system, in particular to an offshore wind-powered aerodynamic suspension vertical-axis seawater desalination system applied to solve the shortage of fresh water resources, and belongs to the field of wind-electromagnetic suspension. Background technique [0002] With the worsening of water shortage and energy crisis, the seawater desalination system powered by new energy has attracted more and more attention from all over the world. Wind power resources have a large capacity and are strictly non-polluting. They are especially suitable for solving remote islands without grid access. Electric energy and fresh water resources seriously affect the quality of life of island residents. However, wind resources and seawater resources are abundant. The development of seawater desalination based on wind energy is the solution to water resources. Deficiency is an effective means to improve the quality ...

AI Technical Summary

Problems solved by technology

However, traditional wind power generation is mostly a horizontal-axis wind power generation system, and its energy interaction with seawater desalination devices adopts a wind-machine-electricity coupling energy supply structure. There are many energy conversion links, and the efficiency of wind energy utilization and seawater desalination is generally low. Seawater desalination efficiency is severely restricted due to high wind energy and volatility, especially for reverse osmosis membrane seawater desalination, which is not suitable for frequent changes in working conditions, frequent fluctuations in wind energy seriously affect seawater desalination efficiency and membrane component life aging

At present, most of the wind turbines in the wind-powered seawater desalination system use horizontal-axis wind turbines. The power generated by the wind turbines fluctuates greatly, and the failure rate of the horizontal-axis yaw windward device is high, which undoubtedly increases the cost of seawater desalination, and the desalination pressure of seawater desalination membrane modules Most of the control adopts a simple shutdown structure. Although battery energy storage is also used to stabilize wind energy fluctuations, frequent charging and discharging of electrodes will easily lead to a reduction in battery life and increase desalination costs. Therefore, it is necessary to study a method that can reduce wind energy conversion. The wind-driven seawater desalination system with coexistence of energy storage methods will really promote the real practicality of the wind-driven seawater desalination system

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