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Arab countries are spending their abundant oil moneys to operate numerous sea water desalination plants. They typically use multistage flash evaporation, making use of high temperature steam coming out of thermal power plants to evaporate the sea water to obtain fresh water. Where there are no power generation plants, people are using reverse osmosis process, which filters out salt and other substances when the pressured sea water passes through a membrane (reverse osmosis membrane).
However, the multistage flash evaporation method requires a certain kind of location, and the reverse osmosis method requires a large amount of electric power.
Our group has developed a new sea water desalination technology that does not require either a heat source unlike the multistage flash evaporation method, or a large amount of electrical power unlike the reverse osmosis method. I cannot disclose its mechanisms here because it pertains to our patent application, but I can mention at least that this new technology has a high efficiency even at a small scale desalination plant. This makes it possible to realize a system where we build canals in a desert and place a number of desalination plants along the canal for irrigation.
An advantage of this system is that there is no need for infrastructures such as pipelines to distribute fresh water. Magnesium compound that is produced as a byproduct to fresh water can be converted to magnesium using solar-energy-pumped lasers. There are no harmful byproducts such as condensed sea water.
One use of solar light is to generate electricity, but electricity cannot be stored. We need power distribution networks to deliver the electricity to where it is consumed. Also, solar cells require a fair amount of energy to manufacture. On the other hand, if the solar light is used to manufacture magnesium, the solar light energy can be stored as magnesium as much as we want. Once a certain amount of magnesium has been produced, it can be shipped out just like any other commodities. The actual ships can navigate through the canals built to distribute water, carrying agricultural produce and magnesium.

2 Comments to “A new seawater-desalination technology which uses solar energy”

  1. [...] 現在の「エネルギー通貨」は、電気です。電力網を介して流通し、熱や動力、証明などさまざまな用途に使われます。最近まで、将来のエネルギー通貨になる可能性があるのは水素だと言われていました。しかし、私たちが考える次世代のエネルギー通貨は、本物の通貨と同じ金属。アルミニウムよりも軽く、銀白色の輝きを放つ金属、マグネシウムです。 海水中には、1800兆トンという大量のマグネシウムが含まれています。このマグネシウムを「太陽光励起レーザー」を利用して製錬すれば、自動車や発電所の燃料として利用することができます。生成された酸化マグネシウムは、太陽光励起レーザーを利用することで金属マグネシウムとして再生することが可能です。 海水からマグネシウムを取り出すには、太陽エネルギーを利用した低コストで高効率の淡水化装置を使います。これはまた、世界的な水不足への解となるでしょう。 ○関連情報 ・マグネシウムは燃料である ・マグネシウム燃料電池 ・マグネシウムは火力発電所の燃料として使える ・マグネシウム製造には大量のエネルギーが必要 ・低コストで超高温を実現する「太陽光励起レーザー」 ・レーザーでマグネシウムを製錬できるのか? ・海水からマグネシウムを取る ・太陽エネルギーを利用した新しい海水淡水化技術 [...]

  2. Benson says:

    Please send me more information on the desalination plant which uses solar energy.

    Typlically for a 5Million litters per day, what is a ball park figure of investment we are looking at.

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