气候变化领域集成服务门户(CCPortal): Solar passive distiller with high productivity and Marangoni effect-driven salt rejection

CCPortal

DOI	10.1039/d0ee01440k
	Solar passive distiller with high productivity and Marangoni effect-driven salt rejection
	Morciano M.; Fasano M.; Boriskina S.V.; Chiavazzo E.; Asinari P.
发表日期	2020
ISSN	1754-5692
起始页码	3646
结束页码	3655
卷号	13 期号:10
英文摘要	Inadequate water supply, sanitation and hygiene in remote locations, developing countries, and disaster zones fuel the growing demand for efficient small-scale desalination technologies. The aim is to provide high-quality freshwater to water-stressed and disaster-stricken communities even in the absence of energy infrastructure. The major key drivers behind the development of these technologies are the low cost of materials, the flexibility of the technology, the sustainability of the freshwater production, and the long-term stability of the device performance. However, the main challenge is to achieve stable performance by either preventing or mitigating salt accumulation during the desalination process. We present a multistage passive solar distiller whose key-strength is an optimized geometry leading to enhanced water yield (as compared to similar state of the art technologies) and spontaneous salt rejection. A comprehensive theoretical study is conducted to explain the apparently paradoxical experimental effective transport exceeding classical diffusion by two orders of magnitude. In our study, the Marangoni effect is included at the water-air interface and it stems from spatial gradients of surface tension. Interestingly, theoretical and experimental results demonstrate that the device is able to reject overnight all the salt accumulated on each evaporator during daytime operation. Furthermore, under realistic conditions, a distillate flow rate of almost 2 L m-2 h-1 from seawater at less than one sun illumination has been experimentally observed. The reported mechanism of the enhanced salt rejection process may have tremendous implications in the desalination field as it paves the way to the design of a new generation of hydrophilic and porous materials for passive thermal desalination. We envision that such a technology can help provide cheap drinking water, in a robust way, during emergency conditions, while maintaining stable performance over a long time. © The Royal Society of Chemistry.
语种	英语
scopus关键词	Desalination; Developing countries; Disasters; Phase interfaces; Porous materials; Potable water; Water supply; Desalination technologies; Emergency conditions; Energy infrastructures; One-sun illumination; Optimized geometries; Realistic conditions; State-of-the-art technology; Thermal desalination; Passive solar buildings
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162686
作者单位	Department of Energy, Politecnico di Torino Corso, Duca degli Abruzzi 24, Torino, 10129, Italy; Clean Water Center, Politecnico di Torino Corso Duca Degli, Abruzzi 24, Torino, 10129, Italy; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Inrim Istituto Nazionale di Ricerca Metrologica Strada Delle Cacce 91, Torino, 10135, Italy
推荐引用方式 GB/T 7714	Morciano M.,Fasano M.,Boriskina S.V.,et al. Solar passive distiller with high productivity and Marangoni effect-driven salt rejection[J],2020,13(10).
APA	Morciano M.,Fasano M.,Boriskina S.V.,Chiavazzo E.,&Asinari P..(2020).Solar passive distiller with high productivity and Marangoni effect-driven salt rejection.Energy and Environmental Science,13(10).
MLA	Morciano M.,et al."Solar passive distiller with high productivity and Marangoni effect-driven salt rejection".Energy and Environmental Science 13.10(2020).