| 摘要 |
<p>An evaporation device (100) has an inner tube (10) and an outer tube (20). The inner tube (10) is made of a hydrophilic membrane, such as Dutyion™. The outer tube (20) is preferably made of a material that readily absorbs solar radiation and is a good heat conductor. There is a gap (30) between the inner tube (10) and the outer tube (20) for the flow of air. The inner tube (10) contains a flow of impure water. The hydrophilic membrane allows water to pass to the outside of the inner tube (10) as vapour, but prevents impurities from passing through. Air flowing in the gap (30) takes up the water vapour and humidified air exits the evaporation device. This humidified air is subsequently cooled to collect the vapour and provide purified water, e.g. at a condenser.</p> |
