真空泵浦及冷凍系統之海水淡化裝置研究

A Study on the Vacuum Pump and Refrigeration System Applied On the Desalination

林明煒(Ming-Wei Lin)

指導教授 ： 卓清松

國立臺北科技大學/機電學院/能源與冷凍空調工程系碩士班/碩士(2009年)

摘要

由於世界各國經濟的急速發展及人口的迅速增加和集中，世界各地對水的需求
日益增加，而地球上的淡水資源非常非常有限，淡水資源缺乏已成為全性的問題。運用再生能源製造淡水是解決用水問題方法之一，再生能源製造淡水可以減少二氧化碳之產生也符合目前世界潮流有可節約能源。本研究系利用風力傳動真空泵浦即冷凍系統之組合成海水淡化裝置，風力傳動之真空泵浦使腔體中之壓力下降至接近絕對真空，因此可以使海水在較低溫下大量蒸發，冷凍系統之壓縮機經由風力傳動使冷煤在系統中循環在蒸發器所產生之低溫可將汽化之水分子凝結成冰，即完成海水淡化之過程，本研究之最大特色為完全採用再生能源，雖然初設成本較高，但以長期遠觀點而言，是值得研發之水質處理方式之一。
海水濃度333,666,999g/20L經40分鐘海水淡化後各為，58g、54g、50g
58g(比重0.9982)、54g(比重0.9979)、50g(比重0.9978)

關鍵字

海水淡化 ； 真空系統 ； 冷凍系統

並列摘要

Due to the rapid economic development of different countries in the world as well as the fast increase and concentration of the world’s population, the demand of water is increasing in all countries of the world. Water is a substance essential to the survival of human beings and to all trades and professions. Without dinking water for one day, man cannot live on. Unfortunately, the world’s clear water resources are very limited. The issue of clear water resources has become a global problem. The water resources we live on mostly come from rainwater or underground water. However, in some islands or regions there is no clear water at all. When there is no rainfall, the problem of water shortage is extremely serious. People living in these places have to transport clear water from other places by vessels or deliver clear water through pipes. In fact, they can use recycled energy to produce clear water since this is one of the solutions of water shortage problem. Using recycled energy to produce clear water can decrease carbon dioxide emission and save energy, which are the measures meeting the current trend of the world. The study makes use of a refrigeration system with wind-driven vacuum pump to form a sea water purification device. The wind-driven vacuum pump can reduce the pressure inside the cavity to

be close to absolute vacuum. Therefore, a great deal of sea water can be evaporated under lower temperature. As the compressor of refrigeration system is driven by wind, the coolant is made to circulate in the system. The low temperature generated by evaporator can condense the vaporized water molecules to be ice, thus completing the purification process of sea water. The system can also be used to undergo recycling treatment of rainwater or waste water to be drinkable clean water. The greatest characteristic of this study is that all the resources adopted are recycled resources. Although the cost for the original establishment of the device is rather high, it is one of the water treatment ways worthy of making research and development in the long run.
After water purification for 40 minutes, the seawater with concentration 333,999g/20L is purified to be 52g, 54g and 55g respectively.
52g (specific gravity 0.9979), 54g (specific gravity 0.9982), 55g (specific gravity 0.9978)

並列關鍵字

ind power ； Desalination ； Vacuum system ； Refrigeration system

參考文獻

1. Hyun-Je Oh, Tae-Mun Hwang, Sangho Lee,“A simplified simulation model of RO systems for seawater desalination”, journal of desalination 238 (2009) 128–139.

2. June-Seok Choia, Tae-Mun Hwanga, Sangho Leea, Seungkwan Hongb, “A systematic approach to determine the fouling index for a RO/NF membrane process”, journal of desalination 238 (2009) 117–127.

3. Chris R. Henderson, James F. Manwell, Jon G. McGowan,“A wind/diesel hybrid system with desalination for Star Island,NH: feasibility study results”, journal of desalination 237 (2009) 318–329.

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5. Sangho Leea, Jun-Seok Choia, Chung-Hak Leeb,“Behaviors of dissolved organic matter in membrane desalination”, journal of desalination 238 (2009) 109–116.