海水淡化的方法

Methods of desalination

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1
目前海水淡化的方法是蒸馏和反渗透，价格昂贵，而且需要消耗大量能源。
The current desalination methods, distillation and reverse osmosis, are expensive and require lots of energy.
2
但是现在有两位来自加拿大的工程师找到了一种独创性的方法- - - - -用太阳的热能进行海水淡化。
Now, though, a pair of Canadian engineers have come up with an ingenious way of using the heat of the sun to drive the process.
3
一种方法是海水蒸馏，通过加热卤水可以得到浓缩的水蒸气，这种方法每淡化1立方米的海水需要10千瓦时的电量。
Some employ distillation, which needs about 10 kilowatt-hours (kWh) of energy per cubic metre of seawater processed. Brine is heated, and the resulting water vapour is condensed.

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