太阳能膜蒸馏海水淡化过程的研究

发布时间：2018-05-31 14:05

  本文选题：太阳能 + 膜蒸馏　； 参考：《华东理工大学》2015年硕士论文

【摘要】：能源危机与淡水资源短缺已成为制约人类社会发展的重要因素,本课题将太阳能集热技术和膜蒸馏海水淡化技术进行耦合,实现了利用太阳能进行海水淡化的过程,为分散式供水的海洋平台和岛礁开发开辟了一条选择的途径。论文提出了一种新型太阳能集热管,利用集热管内不同区域的密度差形成的推动力来推动海水在膜蒸馏系统装备中的流动,并以此设计了自推动的太阳能膜蒸馏海水淡化系统装置。研究了太阳照度、流量、进口海水温度等因素对集热管出口温度的影响,并对新型太阳能集热管进行了计算机CFD模拟,观察了太阳能集热管部件内海水的流动状态及其温度分布情况,提出集热管内部结构优化方案,优化后出口海水温度升高了2.3℃。然后研究了整个系统膜淡水通量与太阳照度、流量等影响因素的关系,研究表明在一定太阳照度下,存在系统最佳流量使得膜淡水通量有最大值。最后研究了增加湿壁后膜两侧温差及膜蒸馏淡水通量的变化情况,实验表明可以在膜组件增加湿壁对膜蒸馏过程进行强化,增加湿壁后在适宜的条件下,膜的最大淡水通量达到232 g/m2.h。
[Abstract]:The energy crisis and the shortage of fresh water resources have become an important factor restricting the development of human society. In this paper, the solar energy collection technology and membrane distillation desalination technology are coupled to realize the process of seawater desalination using solar energy. It opens up an alternative way for offshore platform and reef development of distributed water supply. In this paper, a new type of solar collector tube is proposed to promote the flow of seawater in membrane distillation system by using the driving force of density difference in different regions in the collector tube. A self-propelled solar membrane desalination system for seawater distillation was designed. The effects of solar illumination, flow rate and inlet seawater temperature on the outlet temperature of the collector tube are studied. The computer CFD simulation of the new solar collector tube is carried out. The flow state and temperature distribution of seawater in solar collector tube were observed, and the optimization scheme of the inner structure of the collector pipe was put forward. After the optimization, the seawater temperature at the outlet increased by 2.3 鈩，

本文编号：1959991