基于盐差发电系统的自驱型旋转式压力交换器的仿真及优化

发布时间：2018-05-20 05:56

本文选题：盐差能 + 旋转式压力交换器　；参考：《中国海洋大学》2014年硕士论文

【摘要】：盐差能作为一种新型、清洁、无污染的可再生能源，其主要表现形式为海水与淡水之间或者两种盐度不同的海水之间的化学电位差能，是以化学能形态存在于海洋之中的海洋能。盐差能具有蕴藏量大、单位面积能量密度高等特点，若将盐差能转化为电能，将具有非常可观的社会效益和经济效益。本文通过参考国内外盐差能发电技术的研究成果并结合实验室所申请的100W盐差能发电项目，，通过原理分析、参数计算以及原理试验等方式，建立了一套采用渗透压法进行盐差能发电的试验系统。压力交换器作为渗透压法盐差能发电系统中的核心部件，其工作性能对盐差发电系统的发电效率具有极大的影响。然而，由于目前市面上的压力交换装置主要应用于反渗透海水系统，直接采用现有产品时，其在盐差能发电系统中的能量转化效率会在一定程度上低于理论设计值，因而文中尝试自行设计一种适用于100W盐差能发电项目的自驱型旋转式压力交换器。在自驱型旋转式压力交换器的设计过程中，最主要的是转子以及端盖的设计。转子的设计参数包括孔道的结构、个数以及相关的尺寸；端盖的参数主要是孔道的尺寸以及集液槽的内部结构。以渗透压法盐差能发电系统中的压力交换器的工作环境为设计依据，结合旋转式压力交换器的设计理论，对自驱型旋转式压力交换器的结构参数以及尺寸参数进行确定。再根据所得出的设计结果，采用三维绘图软件SolidWorks绘制出了转子和端盖的三维模型。此外，为了进一步的对装置核心部件的工作状态进行分析，将绘制出的转子孔道和端盖孔道的三维模型以STEP的格式保存后导入到Gambit软件中，进行网格划分以及初始工作条件的设定后，运用Fluent软件进行分析，模拟出核心部件的工作状态。最后根据仿真的结果进行分析以及优化设计，由此得出更为合理的设计方案。
[Abstract]:Salt difference energy, as a new, clean and non-polluting renewable energy, is mainly expressed in the form of chemical potential difference between seawater and fresh water or between two kinds of seawater with different salinity. It is the ocean energy that exists in the ocean in the form of chemical energy. Salt difference energy has the characteristics of large potential and high energy density per unit area. If the salt difference energy is converted into electric energy, it will have considerable social and economic benefits. In this paper, by referring to the domestic and foreign research results of salt differential energy generation technology and combining with the 100W salt differential energy generation project applied by the laboratory, through principle analysis, parameter calculation and principle test, etc. A test system of salt differential energy generation by osmotic pressure was established. As the core component of osmotic salt differential power generation system, the working performance of pressure exchanger has great influence on the generation efficiency of salt differential power generation system. However, because the pressure exchange devices on the market are mainly used in reverse osmosis seawater systems, the energy conversion efficiency in salt differential energy generation system will be lower than the theoretical design value to some extent when the existing products are used directly. Therefore, this paper attempts to design a self-displacement rotary pressure exchanger suitable for 100W salt differential energy generation project. In the design process of self-displacement rotary pressure exchanger, the design of rotor and end cover is the most important. The design parameters of the rotor include the structure, the number and the relevant dimensions of the holes, while the parameters of the end cover are the size of the hole and the internal structure of the liquid collecting tank. Based on the working environment of the pressure exchanger in the salt differential energy generation system with osmotic pressure method and the design theory of the rotary pressure exchanger, the structural parameters and dimension parameters of the self-displacement rotary pressure exchanger are determined. According to the design result, the 3D model of rotor and end cover is drawn by using 3D drawing software SolidWorks. In addition, in order to further analyze the working state of the core components of the device, the 3D model of the rotor channel and the end cover hole is saved in the format of STEP and imported into the Gambit software. After meshing and setting the initial working conditions, the working state of the core components is simulated by using Fluent software. Finally, according to the result of simulation and optimization design, a more reasonable design scheme is obtained.
【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM619

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