Design and preparation of salt hydrate/ graphene oxide@SiO2/ SiC composites for efficient solar thermal utilization

2022 ◽  
Vol 236 ◽  
pp. 111524
Author(s):  
Hongzhi Cui ◽  
Pizhuang Wang ◽  
Haibin Yang ◽  
Tao Xu
Keyword(s):  
Graphene Oxide ◽  
Solar Thermal ◽  
Salt Hydrate ◽  
Sic Composites

scholarly journals Free-standing reduced graphene oxide (rGO) membrane for salt-rejecting solar desalination via size effect

Nanophotonics ◽  
2020 ◽  
Vol 9 (15) ◽  
pp. 4601-4608 ◽  
Author(s):  
Pengyu Zhuang ◽  
Hanyu Fu ◽  
Ning Xu ◽  
Bo Li ◽  
Jun Xu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Conversion Efficiency ◽  
High Salinity ◽  
Interlayer Spacing ◽  
Structural Instability ◽  
Solar Thermal ◽  
Free Standing ◽  
Solar Desalination ◽  
Reduced Graphene

AbstractInterfacial solar vapor generation has revived the solar-thermal-based desalination due to its high conversion efficiency of solar energy. However, most solar evaporators reported so far suffer from severe salt-clogging problems during solar desalination, leading to performance degradation and structural instability. Here, we demonstrate a free-standing salt-rejecting reduced graphene oxide (rGO) membrane serving as an efficient, stable, and antisalt-fouling solar evaporator. The evaporation rate of the membrane reaches up to 1.27 kg m−2 h−1 (solar–thermal conversion efficiency ∼79%) under one sun, out of 3.5 wt% brine. More strikingly, due to the tailored narrow interlayer spacing, the rGO membrane can effectively reject ions, preventing salt accumulation even for high salinity brine (∼8 wt% concentration). With enabled salt-antifouling capability, flexibility, as well as stability, our rGO membrane serves as a promising solar evaporator for high salinity brine treatment.

Development of a solar thermal storage cum cooking device using salt hydrate

Solar Energy ◽  
2018 ◽  
Vol 171 ◽  
pp. 784-789 ◽  
Author(s):  
Atul G. Bhave ◽  
Kavendra A. Thakare
Keyword(s):  
Thermal Storage ◽  
Solar Thermal ◽  
Salt Hydrate

scholarly journals Ethylene glycol-based solar-thermal fluids dispersed with reduced graphene oxide

RSC Advances ◽  
2019 ◽  
Vol 9 (18) ◽  
pp. 10282-10288 ◽  
Author(s):  
Lei Shu ◽  
Jingyi Zhang ◽  
Benwei Fu ◽  
Jiale Xu ◽  
Peng Tao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Ethylene Glycol ◽  
Reduced Graphene Oxide ◽  
Thermal Energy ◽  
Solar Thermal ◽  
Direct Absorption ◽  
Solar Thermal Energy ◽  
Medium Temperature ◽  
Thermal Fluids ◽  
Reduced Graphene

Ethylene glycol nanofluids uniformly dispersed with reduced graphene oxide were prepared for medium-temperature direct absorption-based solar-thermal energy harvesting.

scholarly journals Performance Evaluation of a Direct Absorption Collector for Solar Thermal Energy Conversion

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4956
Author(s):  
Abdul Sattar ◽  
Muhammad Farooq ◽  
Muhammad Amjad ◽  
Muhammad A. Saeed ◽  
Saad Nawaz ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Solar Flux ◽  
Solar Thermal ◽  
Potential Candidate ◽  
Direct Absorption ◽  
Solar Thermal Energy ◽  
Thermal Energy Conversion ◽  
Water Based

The solar absorption efficiency of water as a base-fluid can be significantly improved by suspending nanoparticles of various materials in it. This experimental work presents the photo thermal performance of water-based nano-fluids of graphene oxide (GO), zinc oxide (ZnO), copper oxide (CuO), and their hybrids under natural solar flux for the first time. Nanofluid samples were prepared by the two-step method and the photothermal performance of these nanofluid samples was conducted under natural solar flux in a particle concentration range from 0.0004 wt % to 0.0012 wt %. The photothermal efficiency of water-based 0.0012 wt % GO nanofluid was 46.6% greater than that of the other nanofluids used. This increased photothermal performance of GO nanofluid was associated with its good stability, high absorptivity, and high thermal conductivity. Thus, pure graphene oxide (GO) based nanofluid is a potential candidate for direct absorption solar collection to be used in different solar thermal energy conversion applications.

Rational design of reduced graphene oxide film for solar thermal desalination

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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