發(fā)布時(shí)間：2018-05-31 14:05

  本文選題：太陽(yáng)能 + 膜蒸餾��； 參考：《華東理工大學(xué)》2015年碩士論文

【摘要】：能源危機(jī)與淡水資源短缺已成為制約人類社會(huì)發(fā)展的重要因素,本課題將太陽(yáng)能集熱技術(shù)和膜蒸餾海水淡化技術(shù)進(jìn)行耦合,實(shí)現(xiàn)了利用太陽(yáng)能進(jìn)行海水淡化的過(guò)程,為分散式供水的海洋平臺(tái)和島礁開發(fā)開辟了一條選擇的途徑。論文提出了一種新型太陽(yáng)能集熱管,利用集熱管內(nèi)不同區(qū)域的密度差形成的推動(dòng)力來(lái)推動(dòng)海水在膜蒸餾系統(tǒng)裝備中的流動(dòng),并以此設(shè)計(jì)了自推動(dòng)的太陽(yáng)能膜蒸餾海水淡化系統(tǒng)裝置。研究了太陽(yáng)照度、流量、進(jìn)口海水溫度等因素對(duì)集熱管出口溫度的影響,并對(duì)新型太陽(yáng)能集熱管進(jìn)行了計(jì)算機(jī)CFD模擬,觀察了太陽(yáng)能集熱管部件內(nèi)海水的流動(dòng)狀態(tài)及其溫度分布情況,提出集熱管內(nèi)部結(jié)構(gòu)優(yōu)化方案,優(yōu)化后出口海水溫度升高了2.3℃。然后研究了整個(gè)系統(tǒng)膜淡水通量與太陽(yáng)照度、流量等影響因素的關(guān)系,研究表明在一定太陽(yáng)照度下,存在系統(tǒng)最佳流量使得膜淡水通量有最大值。最后研究了增加濕壁后膜兩側(cè)溫差及膜蒸餾淡水通量的變化情況,實(shí)驗(yàn)表明可以在膜組件增加濕壁對(duì)膜蒸餾過(guò)程進(jìn)行強(qiáng)化,增加濕壁后在適宜的條件下,膜的最大淡水通量達(dá)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，

本文編號(hào)：1959991