基于潮流能直驱式海水淡化系统的初步探索

Preliminary Study on Tidal Current Energy Direct Drive Type Seawater Desalination System

在远离大陆的小岛上,电能和淡水都极其缺乏,而制淡水的反渗透海水淡化设备大多是通过电驱动,如何利用海岛周围丰富的海洋能进行直驱式海水淡化已成为迫切需要解决的问题。潮流能被认为是全球很有潜力的可再生能源,为此提出使用桨叶捕获潮流能,并将捕获的能量直接转换为高压海水进行海水淡化,同时对海水淡化过程产生的浓海水进行能量回收。系统减少了中间过程的能量转化次数,大大提高了潮流能转换效率,而且系统中的蓄能器也对进入反渗透装置的海水压力起到了稳定的作用。对潮流能海水淡化的过程建立了数学模型,为进一步研究潮流能海水淡化提供了理论基础。实验表明文中提出的海水淡化系统已完全达到设计要求,为潮流能海水淡化的商业化奠定了基础。

An island isolated from the continent is extremely short of electricity and freshwater. However, equipment used in reverse osmosis desalination is mostly driven by electricity. Therefore, direct drive seawater desalination driven by abundant ocean energies around the island has become an urgent need. Tidal current energy is considered to be a promising global renewable energy. The use of hydraulic power output machine will absorb the energy with which the feed is converted into high pressure seawater for desalination, meanwhile energy recovery devices are used for concentrated seawater produced by the desalination process. The system reduces the frequency of energy conversion in the intermediate process, significantly improving the conversion rate of tidal current energy. The energy accumulator in the system can stabilize the pressure of seawater fed into the reverse osmosis devices. The mathematical model has been established for the process of tidal current energy powered seawater desalination, providing the theoretical basis for further study on the novel desalination technology. The experiments indicate that the seawater desalination system presented in this paper completely meets the design requirements, laying a solid foundation for the commercialization of tidal current energy powered desalination.