海水淡化
环境科学
地热脱盐
辐射冷却
盐水
环境工程
辐射传输
太阳能淡化
盐度
气象学
膜
化学
生态学
物理
量子力学
生物化学
生物
作者
Xin Huang,Jyotirmoy Mandal,Xu Jin,Aaswath Raman
出处
期刊:Joule
[Elsevier]
日期:2022-12-01
卷期号:6 (12): 2762-2775
被引量:5
标识
DOI:10.1016/j.joule.2022.10.009
摘要
Increasing water scarcity in the face of climate change has driven significant interest in finding low-carbon-intensity ways of generating fresh water from saline sources. Conventional membrane and thermal desalination techniques require large energy inputs that can become prohibitive as salinity increases. Alternatively, solar desalination is a well-developed passive evaporative approach but is limited seasonally and geographically by solar insolation. Here, we propose and demonstrate a passive approach to a more thermodynamically attractive phase change that can also enable desalination: freezing. We develop a system that uses passive radiative cooling to the ultimate heat sink, outer space, to freeze and desalinate salt water. We experimentally demonstrate the passive desalination of 37.3 g/L salt water to 1.88 g/L after two radiative cooling-driven freezing desalination stages with 50% recovery and 17.5 g/L salt water to 0.7 g/L with 65% recovery. Our results highlight the potential of harnessing untapped thermodynamic resources for water technologies.
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