Solar Thermal‐Driven Desalination Pursuing Products of Pure Water and Salts and Leaving Minimum Impact to Environment

Numerical simulation of thermal efficiency of an innovative Al2O3 nanofluid solar thermal collector: Influence of nanoparticles concentration

Thermal Science ◽

10.2298/tsci151207168c ◽

2017 ◽

Vol 21 (6 Part B) ◽

pp. 2769-2779 ◽

Cited By ~ 21

Author(s):

Gianpiero Colangelo ◽

Marco Milanese ◽

Risi de

Keyword(s):

Thermal Efficiency ◽

Volume Fraction ◽

Pure Water ◽

Weather Conditions ◽

Solar Thermal ◽

Working Fluid ◽

Al2o3 Nanoparticles ◽

Solar Thermal Collector ◽

Nanoparticles Concentration ◽

Al2o3 Nanofluid

Investigations on the potential thermal efficiency of an innovative nanofluid solar thermal collector have been performed using a commercial software (RadTherm ThermoAnalytics rel. 10.5). The Al2O3-nanofluid has been simulated as working fluid of the solar thermal collector, varying the nanoparticles concentration from 0%vol of Al2O3 nanoparticles (pure water) up to 3%vol of Al2O3 of nanoparticles. The numerical model has been validated with experimental data, obtained with a real prototype of the simulated solar thermal collector. Real thermal properties of the nanofluids at different concentrations have been used in the simulations. The boundary conditions used for the simulations have been those of real weather conditions. An increase in thermal efficiency (up to 7.54%) has been calculated using nanofluid with a volume fraction of 3% and the influence of nanoparticles concentration on the thermal performance of the solar collector has been pointed out.

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Rational design of reduced graphene oxide film for solar thermal desalination

Water Science & Technology Water Supply ◽

10.2166/ws.2019.043 ◽

2019 ◽

Vol 19 (6) ◽

pp. 1704-1710

Author(s):

Yuan Meng ◽

Haibo Li

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Rational Design ◽

Evaporation Rate ◽

Pure Water ◽

Cost Effective ◽

Solar Thermal ◽

Water Evaporation ◽

Reduced Graphene ◽

Thermal Desalination

Abstract Solar water evaporation assisted by photothermal membranes is considered to be one of the sustainable and cost-effective strategies for pure water generation and wastewater treatment. In this work, a self-assembled reduced graphene oxide (rGO) film has been prepared and proposed for direct solar thermal desalination. The morphology, structure, absorbance and desalination performance of the rGO film are explored. It is found that rGO film with optimized microstructure delivers an evaporation rate of 0.87 kg m−2 h−1 with solar thermal conversion efficiency of 46% under 1 sun illumination. Moreover, the evaporation rate of rGO film remains at 0.86 kg/m2·h−1 after ten times recycling, demonstrating the superior reusability.

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Techno-economic optimization of solar thermal integrated membrane distillation for co-generation of heat and pure water

10.5004/dwt.2017.21615 ◽

2017 ◽

Vol 98 ◽

pp. 16-30 ◽

Cited By ~ 2

Author(s):

Nutakki Tirumala Uday Kumar ◽

Andrew Martin

Keyword(s):

Pure Water ◽

Membrane Distillation ◽

Solar Thermal ◽

Economic Optimization

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Decoration of specific sites on freeze-fractured membranes

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100081565 ◽

1978 ◽

Vol 36 (2) ◽

pp. 140-141

Author(s):

H. Gross ◽

H. Moor

Keyword(s):

Pure Water ◽

Freeze Fracture ◽

Chemical Properties ◽

Surface Forces ◽

Sulfate Pentahydrate ◽

Copper Sulfate Pentahydrate ◽

Physico Chemical ◽

Water Of Hydration ◽

Small Container ◽

Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

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