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 Self-dispersible graphene quantum dots in ethylene glycol for direct absorption-based medium-temperature solar-thermal harvesting

RSC Advances ◽  
2020 ◽  
Vol 10 (73) ◽  
pp. 45028-45036
Author(s):  
Ruiming Lin ◽  
Jingyi Zhang ◽  
Lei Shu ◽  
Jing Zhu ◽  
Benwei Fu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Harvesting ◽  
Ethylene Glycol ◽  
Thermal Energy ◽  
Graphene Quantum Dots ◽  
Solar Thermal ◽  
Direct Absorption ◽  
Solar Thermal Energy ◽  
Medium Temperature ◽  
Thermal Energy Harvesting

Self-dispersible graphene quantum dots in ethylene glycol enable stable nanofluidic solar-thermal energy harvesting at medium temperatures.

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.

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.

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