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Article

Cool Steam Method for Desalinating Seawater

1
The International Center for Numerical Methods in Engineering, c/ Gran Capità, s/n, 08034 Barcelona, Spain
2
Fresh Water Nature, C/Esteve Terradas, 5, 08860 Castelldefels, Barcelona, Spain
3
Cimne Tecnología, S.A., Gran Capità, s/n Edificio B0, Campus Nord UPC, 08034 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Water 2019, 11(11), 2385; https://doi.org/10.3390/w11112385
Received: 31 August 2019 / Revised: 24 October 2019 / Accepted: 6 November 2019 / Published: 14 November 2019
(This article belongs to the Special Issue Sustainable Design for Seawater Desalination)
Cool steam is an innovative distillation technology based on low-temperature thermal distillation (LTTD), which allows obtaining fresh water from non-safe water sources with substantially low energy consumption. LTTD consists of distilling at low temperatures by lowering the working pressure and making the most of low-grade heat sources (either natural or artificial) to evaporate water and then condensate it at a cooler heat sink. To perform the process, an external heat source is needed that provides the latent heat of evaporation and a temperature gradient to maintain the distillation cycle. Depending on the available temperature gradient, several stages can be implemented, leading to a multi-stage device. The cool steam device can thus be single or multi-stage, being raw water fed to every stage from the top and evaporated in contact with the warmer surface within the said stage. Acting as a heat carrier, the water vapor travels to the cooler surface and condensates in contact with it. The latent heat of condensation is then conducted through the conductive wall to the next stage. Net heat flux is then established from the heat source until the heat sink, allowing distilling water inside every parallel stage. View Full-Text
Keywords: freshwater production; vacuum distillation; low-temperature thermal distillation (LTTD); Cool Steam (CS); waste heat; Renewable Energy (RE); seawater reverse osmosis (SWRO); multi-effect distillation (MED); multi-stage flash (MSF) freshwater production; vacuum distillation; low-temperature thermal distillation (LTTD); Cool Steam (CS); waste heat; Renewable Energy (RE); seawater reverse osmosis (SWRO); multi-effect distillation (MED); multi-stage flash (MSF)
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MDPI and ACS Style

Arnau, P.A.; Navarro, N.; Soraluce, J.; Martínez-Iglesias, J.M.; Illas, J.; Oñate, E. Cool Steam Method for Desalinating Seawater. Water 2019, 11, 2385. https://doi.org/10.3390/w11112385

AMA Style

Arnau PA, Navarro N, Soraluce J, Martínez-Iglesias JM, Illas J, Oñate E. Cool Steam Method for Desalinating Seawater. Water. 2019; 11(11):2385. https://doi.org/10.3390/w11112385

Chicago/Turabian Style

Arnau, Pedro A., Naeria Navarro, Javier Soraluce, Jose M. Martínez-Iglesias, Jorge Illas, and Eugenio Oñate. 2019. "Cool Steam Method for Desalinating Seawater" Water 11, no. 11: 2385. https://doi.org/10.3390/w11112385

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