潮流能直驱式海水淡化系统的研究
发布时间：2018-10-18 11:50
【摘要】：在21世纪中，潮流能必定是能源消费结构的重要组成部分，是一种非常有前景的绿色可再生能源产业。可是，目前潮流能的主要利用形式是发电，而很少直接用于海水淡化。现有的反渗透海水淡化设备大多都是通过稳定的电能驱动的，而在一个远离大陆的小岛上电能和淡水都是极其缺乏的。如何利用海岛周围丰富的海洋能进行直驱式海水淡化，这是目前急需解决的难题。 本文提出使用捕能系统捕获潮流能带动低速海水泵把低压海水转换为高压海水进行海水淡化，并对海水淡化过程所产出的浓海水进行能量回收。潮流能海水淡化关键在于提高能量转换效率和稳定进入海水淡化系统前的海水压力。潮流能海水淡化系统采用水液压直驱式和能量回收系统等设计方法提高了潮流能转换效率，而且系统中的高、低压蓄能器及压力调节控制方式等对海水淡化过程中海水压力起着稳定的作用。 在潮流能时变的特点之上基于流体力学理论，建立了潮流能直驱式海水淡化系统的各个子系统的数学模型，，并最终推导出潮流能直驱式海水淡化系统的离散型数学模型。该数学模型考虑了水液压系统内部件的滑动摩擦力和泄露量。在有无控制的情况下，通过压力调节控制、能量回收系统控制和最大产水量的控制等控制方式对潮流能海水淡化系统的数学模型在系统压力、产水量和产水比能耗等方面进行仿真。仿真结果表明:系统压力相对稳定、系统产水量大、产水比能耗小。同时，论述了海水淡化样机的原理、参数确定、设计及制作过程，并进行海上实验。
[Abstract]:In the 21st century, tidal energy is an important part of energy consumption structure, and it is a promising green renewable energy industry. However, power generation is the main form of tidal energy utilization, and is rarely directly used in seawater desalination. Most of the existing reverse osmosis seawater desalination equipment is driven by stable electric energy, while on a small island far from the mainland, electricity and fresh water are extremely scarce. How to use the abundant ocean energy around the island to desalinate seawater directly is a difficult problem that needs to be solved. In this paper, energy capture system is used to capture tidal current energy to drive low speed sea water pump to convert low pressure seawater to high pressure sea water for desalination, and to recover the energy of concentrated seawater produced by desalination process. The key of tidal current energy desalination lies in improving the efficiency of energy conversion and stabilizing the seawater pressure before entering the desalination system. The design methods of water hydraulic direct drive and energy recovery system are used in tidal current desalination system to improve the efficiency of power flow energy conversion, and the system is very high. Low pressure accumulator and pressure regulation control method play a stable role in seawater desalination process. Based on the hydrodynamic theory, the mathematical models of each subsystem of tidal current direct drive seawater desalination system are established, and the discrete mathematical model of tidal current direct drive seawater desalination system is deduced. The mathematical model takes into account the sliding friction force and leakage of the components in the hydraulic system. With or without control, the mathematical model of tidal current desalination system is under pressure through the control of pressure regulation, energy recovery system control and maximum water yield control. Water production and specific energy consumption are simulated. The simulation results show that the pressure of the system is relatively stable, the water production of the system is large and the specific energy consumption is low. At the same time, the principle, parameter determination, design and manufacture process of seawater desalination prototype are discussed.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P747;P743
本文编号：2279040
[Abstract]:In the 21st century, tidal energy is an important part of energy consumption structure, and it is a promising green renewable energy industry. However, power generation is the main form of tidal energy utilization, and is rarely directly used in seawater desalination. Most of the existing reverse osmosis seawater desalination equipment is driven by stable electric energy, while on a small island far from the mainland, electricity and fresh water are extremely scarce. How to use the abundant ocean energy around the island to desalinate seawater directly is a difficult problem that needs to be solved. In this paper, energy capture system is used to capture tidal current energy to drive low speed sea water pump to convert low pressure seawater to high pressure sea water for desalination, and to recover the energy of concentrated seawater produced by desalination process. The key of tidal current energy desalination lies in improving the efficiency of energy conversion and stabilizing the seawater pressure before entering the desalination system. The design methods of water hydraulic direct drive and energy recovery system are used in tidal current desalination system to improve the efficiency of power flow energy conversion, and the system is very high. Low pressure accumulator and pressure regulation control method play a stable role in seawater desalination process. Based on the hydrodynamic theory, the mathematical models of each subsystem of tidal current direct drive seawater desalination system are established, and the discrete mathematical model of tidal current direct drive seawater desalination system is deduced. The mathematical model takes into account the sliding friction force and leakage of the components in the hydraulic system. With or without control, the mathematical model of tidal current desalination system is under pressure through the control of pressure regulation, energy recovery system control and maximum water yield control. Water production and specific energy consumption are simulated. The simulation results show that the pressure of the system is relatively stable, the water production of the system is large and the specific energy consumption is low. At the same time, the principle, parameter determination, design and manufacture process of seawater desalination prototype are discussed.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P747;P743
【参考文献】
相关期刊论文 前9条
1 巩冰;朱丽娟;游江;;海洋潮流能发电系统的控制技术研究[J];电测与仪表;2010年08期
2 何季民;我国海水淡化事业基本情况[J];电站辅机;2002年02期
3 林润生;叶家玮;刘林;;相对垂荡运动浮子在海水淡化中的应用探讨[J];广东造船;2010年01期
4 潘焰平 ,李青;海水淡化技术及其应用[J];华北电力技术;2003年10期
5 解利昕,李凭力,王世昌;海水淡化技术现状及各种淡化方法评述[J];化工进展;2003年10期
6 马舜;李伟;刘宏伟;林勇刚;;水平轴潮流能发电系统能量捕获机构研究[J];机械工程学报;2010年18期
7 孙业山;游亚戈;马玉久;吴必军;王利生;盛松伟;何再明;;波浪能海水淡化的应用研究[J];可再生能源;2007年02期
8 孙业山;马玉久;游亚戈;王利生;;反渗透海水淡化中差动式能量回收装置的研究[J];水处理技术;2007年06期
9 曹式芳;海水淡化技术的发展[J];天津化工;2002年02期
本文编号：2279040
本文链接：https://www.wllwen.com/kejilunwen/haiyang/2279040.html
