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2017-2018 產品型錄下載

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Solar Energy Desalination System
產品環境效益說明

1.The present systems for salt water desalination and their shortcomings

On the Earth, the sea water occupies about 97%, the fresh water is only about 3%, and the most fresh water exists in the form of glacier on earth's surface. The fresh water used by humanity only accounts the 0.26% total quantity of global water resources. According to the statistics of United Nations, at present, the whole world surpasses 10 hundred million populations to live in the water resource lacking area, and to 2025, the populations will increase to 18 hundred million. Along with the climatic change, the drought, the requirements of populations and factories, the demanded fresh water is getting more in different countries, causing the supply of fresh water to become large deficiency. In 1965, a small reverse osmosis process desalination factory was constructed in California Coalinga. Until the later stage of 1960, a daily output 8,000 ton seawater desalination factory using the thin-film method was constructed and operated in business. Nowadays, approximately 133 nations had used seawater desalination system to create approximate 32.4 million tons fresh water in one day. Until today, the whole world had over 13 thousand seawater desalination factories in operation, which could produce 0.5% global consumption fresh water. There are two major method are developed to get the fresh water, the evaporation method and the thin-film method. The evaporation method includes the multiple effect distillation (MED, desalination efficiency is about 8.5 %), multistage flash distillation (MFD, desalination efficiency is about 14 %), and vapor compression evaporation (VCE, desalination efficiency is about 38 %). The thin-film method includes reverse osmosis (RO, desalination efficiency is about 35 %), Electro Dialysis (ED, low efficiency), and nanometer-filtering method (still in the lab-researches). At present, the reverse osmosis process is the main seawater desalination method, the amount of daily output is over 14 million tons. Multistage flash distillation is the next process, the amount of daily output is over 12 million tons, and the daily output of Electro Dialysis method is over 1.46 million tons. The reverse osmosis method and multistage flash distillation method are the two major seawater desalination methods. The used methods of the multiple effect distillation, multistage flash distillation, vapor compression evaporation, and reverse osmosis have many shortcomings. The shortcomings are large space needed, long factory constructed time needed, high factory constructed fee needed, low flexibility for factory construction, and high electrical power needed. For that, finding a method to improve the shortcomings mentioned above is necessary, especially for the important key points of high factory constructed fee and short factory constructed time.

2.The proposed new technology method for salt water desalination-Solar energy miniaturization salt water desalination system

The proposed technology in this project is a new method for salt water desalination-Solar energy miniaturization salt water desalination system, the structure for the proposed system is shown in the figure. In the developed system, the seawater is introduced by using the vacuum extraction method. After that, the solar is used to heat and distill the sea water, causing the separation of fresh water and salt and achieving the effect of seawater desalination. The interiors of Solar energy miniaturization salt water desalination system are separated by heating layer, vaporization layer, and cooling layer. The hot-seawater-circulation-system is positioned on the solar-heating layer. When the circulation system passes through the super-heat-pipe, the heat will transform and heat the seawater. The vaporizing steam of seawater contacts the cooling-device in the cooling layer, then the fresh water is obtained and piped out by partition. The slat is piped out from the salt pipe tube, and the desalination efficiency of Solar energy miniaturization salt water desalination system will reach about 65%.

3.The figure merits of Solar energy miniaturization salt water desalination system

a. The high electrical power system is not necessary and the solar energy can be used to supply the insufficient electrical power:

At the beginning, the power designed for the seawater desalination system is the solar energy system. Therefore, the seawater desalination system can establish in the remote districts and the place that electrical power establishment has not arrived. If the solar energy system is unable to provide the enough power sources, the storage hot water is sued to supply the insufficient electrical power. The seawater desalination system does not need to consider the electrical power system enough or not. For that, we can greatly reduce the cost for the construction and maintenance of electrical power system.

b. Less limit for established place:

Because of miniaturization and establishment by using assembly method, the chosen place used to setup the desalination factory has large flexibility. Also, the “Solar energy miniaturization salt water desalination system” does not like the traditional seawater desalination factory, which needs large area. For example, we may directly assemble the three- dimensional construction using the container. The “solar energy miniaturization seawater desalination system” can be put in the upper layer of container. The fresh water is obtained by collecting the water manufactured in each system, therefore water gathering system can be put in the under layer of container.

c. The assembly system has high flexibility, we can quickly increase or decrease the assembly system quantities according to the requirement:

At the beginning, the developed system may establish according to the quantities of requirement. If the more quantities of system are needed, we can expand the quantities according to the requirements. The traditional desalination factory needs to construct a factory to get the fresh water. Because the installation of solar energy miniaturization seawater desalination system can be expanded using the assembly method, the time needed to get more fresh water is very short.

d. Change the constructed place quickly:

The constructed place of the proposed system can be changed quickly, because the considerations of power construction and re-construction are not necessary and the system assembly has high mobility. Therefore, this system may use in the island resort or the seashore.

4.Group for this project

a. Department of Chemical and Materials Engineering, National University of Kaohsiung: Prof. Cheng-Fu Yang, specialize in material analysis, integration of solar system

b. Department of Chemical and Materials Engineering, National University of Kaohsiung: Prof. Chean-Cheng Su, specialize in material analysis, chemical materials

c. Department of Electrical Engineering, Cheng Shiu University: Prof. Cheng-Yi Chen, specialize in control system, electrical circuit design

d. Department of Electrical Engineering, Kao Yuan University: Prof. Zwe-Lee Gaing, specialize in electrical power system, solar cell system

e. Department of Electrical Engineering, Kao Yuan University: Prof. Sun-Li Wu, specialize in electrical power system, driving system

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EZE-ENERGY CO., LTD.
銷售區域
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