scholarly journals New insights into saline water evaporation from porous media: Complex interaction between evaporation rates, precipitation, and surface temperature

2017 ◽  
Vol 44 (11) ◽  
pp. 5504-5510 ◽  
Author(s):  
Salomé M. S. Shokri-Kuehni ◽  
Thomas Vetter ◽  
Colin Webb ◽  
Nima Shokri
Keyword(s):  
Porous Media ◽  
Surface Temperature ◽  
Saline Water ◽  
Complex Interaction ◽  
Water Evaporation

A personal perspective on prediction of saline water evaporation from porous media

2021 ◽  
pp. 1-6
Author(s):  
Salome M. S. Shokri-Kuehni ◽  
Muhammad Sahimi ◽  
Nima Shokri
Keyword(s):  
Porous Media ◽  
Saline Water ◽  
Water Evaporation ◽  
Personal Perspective

scholarly journals Impact of type of salt and ambient conditions on saline water evaporation from porous media

2017 ◽  
Vol 105 ◽  
pp. 154-161 ◽  
Author(s):  
Salomé M.S. Shokri-Kuehni ◽  
Mansoureh Norouzi Rad ◽  
Colin Webb ◽  
Nima Shokri
Keyword(s):  
Porous Media ◽  
Saline Water ◽  
Water Evaporation ◽  
Ambient Conditions

scholarly journals Editorial: Saline Water Evaporation from Porous Media

2019 ◽  
Vol 128 (3) ◽  
pp. 857-859 ◽  
Author(s):  
Nima Shokri ◽  
Marc Prat ◽  
Philippe Coussot
Keyword(s):  
Porous Media ◽  
Saline Water ◽  
Water Evaporation

A numerical model of the open-width coupling drying process for cotton fabrics based on the theory of heat and mass transfer in porous media

2019 ◽  
Vol 90 (13-14) ◽  
pp. 1639-1657
Author(s):  
Shuangqing Wang ◽  
Huile Zhang ◽  
Huimin Chen ◽  
Yi Zhong ◽  
Xiaoli Yue
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Surface Temperature ◽  
Water Content ◽  
Heat And Mass Transfer ◽  
Absolute Error ◽  
Cotton Fabrics ◽  
Water Evaporation ◽  
Drying Process ◽  
Fabric Surface

In order to reveal the physical drying characteristics of various kinds of cotton fabrics and further provide theoretical guides for designing drying equipment and improving drying technologies, a finite element model is built that is able to describe coupling of the drying process between fabrics and environment. Specifically, three kinds of cotton fabrics mesoscopic structures parameters and mechanical properties are firstly measured and then these fabrics are equivalent to porous media, and the equivalent media can characterize the fabrics precisely. Then, the formulas for calculating the convection heat transfer and thermodynamic properties of fabrics are also improved and verified by corresponding experiments. The results shows that the improved formulas can calculate the properties more accurately. Next, we apply this model to analyze the regular change of surface temperature and water content with time during the drying process of three kinds of fabrics under different technologies. The results indicates that the coupled heat and mass transfer of drying processes are obviously affected by liquid phase transition. In addition, with higher wind temperature, the velocity of water evaporation inside fabrics is faster and, when water content inside fabric becomes lower in the drying process, the velocity of water evaporation decreases. The numerical values agrees well with the corresponding experimental values: The mean absolute error of water content inside fabric in the drying process is less than 1.51 g, while the average absolute error of fabric surface temperature is about 1.63℃, which means this model can precisely capture the coupling drying process of various kinds of cotton fabrics inside the oven. It is expected that the model can be applied for providing theoretical guidance for designing structures of drying equipment and improving drying technologies.

Dynamics of solute transport in capillary tubes delineated by dual energy imaging

2020 ◽  
Author(s):  
Nima Shokri ◽  
Salomé M.S. Shokri-Kuehni ◽  
Mohammad Javad Shojaei
Keyword(s):  
Porous Media ◽  
Solute Transport ◽  
Cross Sections ◽  
Saline Water ◽  
Dual Energy ◽  
Water Evaporation ◽  
Transport Mechanisms ◽  
Capillary Tubes ◽  
Fundamental Understanding ◽  
Dual Energy Imaging

<p>Saline water evaporation from a single meniscus plays an important role in determining the general dynamics of evaporation from porous media filled with saline water, which is relevant to several processes such as soil salinization, land-atmosphere interaction and soil moisture-precipitation interactions. Fundamental understanding of the mechanisms controlling solute transport and deposition in single capillary tubes is a necessary step to describe saline water evaporation and solute precipitation in complex porous media (Norouzi Rad et al., 2013; Shokri-Kuehni et al., 2017a; Shokri-Kuehni et al., 2017b). Within this context, we utilized dual energy imaging using synchrotron X-ray micro-tomography (Shokri-Kuehni et al., 2018) to investigate solute transport and deposition during evaporation from single capillary tubes of square and circular cross sections with lateral dimension of 1 mm and 3 mm (two sizes per cross section which resulted in four capillary tubes in total). The capillary tubes were filled with CaI2 solution of 5% concentration (by weight) and were placed under similar evaporative conditions. All boundaries were closed except top which was exposed to air for evaporation. The drying capillary tubes were scanned approximately once every hour for nearly 20 hrs. The recorded images enabled us to quantify solute concentration with a high spatial and temporal resolution throughout the capillary tubes with different sizes and cross sections and delineate the key transport mechanisms controlling solute transport and preferential deposition during evaporation. Our findings clearly show the contribution and impact of corner flow observed in square capillary tubes on the spatio-temporal distribution of solute, the evaporative mass losses and the velocity of the receding meniscus. The obtained results extend the fundamental understanding required for describing the transport mechanisms controlling saline water evaporation from porous media.</p><p>References</p><p>Norouzi Rad, M., N. Shokri, M. Sahimi (2013), Phys. Rev. E, 88, 032404.</p><p>Shokri-Kuehni, S.M.S., T. Vetter, C. Webb, N. Shokri (2017a), Geophys. Res. Lett., 44, 5504–5510.</p><p>Shokri-Kuehni, S.M.S., M. Norouzirad, C. Webb, N. Shokri (2017b), Adv. Water Resour., 105, 154-161.</p><p>Shokri-Kuehni, S.M.S., M. Bergstad, M. Sahimi, C. Webb, N. Shokri (2018b), Sci. Rep., 10, 10731, London: Nature Publishing Group.</p>

Theoretical Analysis of Solar Thermal Desalination Performance Limitation

2020 ◽  
Author(s):  
Yanjie Zheng ◽  
Kelsey B. Hatzell ◽  
Rodrigo Caceres Gonzalez ◽  
Marta C. Hatzell
Keyword(s):  
Surface Temperature ◽  
Solar Collector ◽  
Concentration Ratio ◽  
Saline Water ◽  
Solar Thermal ◽  
Water Salinity ◽  
Recovery Ratio ◽  
Water Production ◽  
Thermal Desalination ◽  
Performance Limitation

Abstract Solar thermal desalination systems utilize concentrated or non-concentrated sunlight to produce heat to drive a phase change separation process and produce freshwater. It could be an effective solution for increasingly scarce freshwater resources and energy shortages across the globe. In order to explore the performance limits and operating parameters that affect specific water production (SWP), this paper proposes a thermodynamic model of the ideal solar-driven thermal desalination process. The model compares two different heating configurations of solar collector system and considers surface temperature of solar collector, concentration ratio, recovery ratio and inlet saline water salinity to find maximum specific water production. The results show that under reversible condition, a flat plate collector with inlet saline water salinity of 35 g/kg will experience an increase in SWP from 29.9 gs−1m−2 to 52.7 gs−1m−2 if the recovery ratio decrease from 70% to 10%. For a system with concentration ratio of 10, when the surface temperature of solar collector is 507K, the maximum specific water production can reach 166.3 gs−1m−2 as the recovery ratio approaches zero. Reduction in incoming fluid salinity can further increase these performance limitations. The work fundamentally demonstrates the thermodynamic process of solar thermal desalination, and proposes a method to evaluate the performance limitation.

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