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Salt-tolerant and low-cost flame-treated aerogel for continuously efficient solar steam generation
Solar Energy ( IF 6.0 ) Pub Date : 2021-09-15 , DOI: 10.1016/j.solener.2021.09.024
Dongyu You , Weiting Yang , Yujuan Zhao , Han Yu , Yu Ma , Duoyu Lin , Qinhe Pan , Shuyan Song

Interface solar-driven evaporation is a very promising technology used in solar energy harvesting, seawater desalination and water purification. However, salt accumulation is still a serious problem that hinders the long-term stable operation of the evaporator. Herein, we use natural wood with inherent porosity to develop a flexible cellulose aerogel, which can be used as efficient and stable solar evaporator for desalination after simple surface carbonization. This aerogel evaporator achieves a solar steam efficiency of 83.4% and an evaporation rate of 1.40 kg m−2 h−1 under the sunlight intensity of 1 kW m−2. In the simulated evaporation experiment for 7 days, the evaporator shows a stable evaporation rate (about 1.39 kg m−2 h−1), indicating the potential for long-term operation. In addition, the evaporator has the ability to resist salt accumulation and self-cleaning. The low cost, simple preparation and multiple functions make the evaporator promising to be a continuous and stable installation for solar desalination.



中文翻译:

用于持续高效太阳能蒸汽产生的耐盐和低成本火焰处理气凝胶

界面太阳能驱动蒸发是一种非常有前途的技术,用于太阳能收集、海水淡化和水净化。然而,盐分的积累仍然是阻碍蒸发器长期稳定运行的严重问题。在此,我们利用具有固有孔隙率的天然木材开发了一种柔性纤维素气凝胶,经过简单的表面碳化后,可用作高效稳定的太阳能蒸发器进行海水淡化。该气凝胶蒸发器在1 kW m -2的阳光强度下实现了83.4%的太阳能蒸汽效率和1.40 kg m -2  h -1的蒸发率。在7天的模拟蒸发实验中,蒸发器显示出稳定的蒸发速率(约1.39 kg m -2  h−1 ),表明长期经营的潜力。此外,蒸发器具有抗盐分积累和自清洁能力。成本低、制备简单、功能多样,使蒸发器有望成为太阳能海水淡化的连续稳定装置。

更新日期:2021-09-15
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