Nanoparticle-based solar vapor generation: An experimental and numerical study
| Autor: | Lizhan Bai, Guiping Lin, Haichuan Jin, Dongsheng Wen, Aimen Zeiny |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
020209 energy 02 engineering and technology Industrial and Manufacturing Engineering Physics::Fluid Dynamics Nanofluid 020401 chemical engineering Latent heat Vaporization 0202 electrical engineering electronic engineering information engineering Radiative transfer 0204 chemical engineering Electrical and Electronic Engineering Civil and Structural Engineering business.industry Mechanical Engineering Radiant energy Building and Construction Solar energy Pollution General Energy Electricity generation Thermal radiation Physics::Space Physics Optoelectronics Astrophysics::Earth and Planetary Astrophysics business |
| Zdroj: | Energy. 178:447-459 |
| ISSN: | 0360-5442 |
| DOI: | 10.1016/j.energy.2019.04.085 |
| Popis: | Steam generation by nanofluid under solar radiation has attracted intensive attention recently. Due to strong absorption of solar energy, nanoparticle-based solar vapor generation could have wide applications in many areas including desalination, sterilization and power generation. Steam generation of different concentrations of gold nanoparticle dispersions under focused sunlight of 5 sun and 10 sun were performed in this work. A numerical model combining radiative heat transfer, moisture transport, and laminar flow was established to investigate the temperature profile, evaporation rate above the surface and radiative intensity distribution inside the nanofluid. It was found that localized energy trapping at the surface of nanofluid was responsible for the fast vapor generation. To convert more solar radiative energy into latent heat of water (i.e., to vaporize water) at the surface, a new method was proposed to optimize the range of nanofluid concentration and optical depth for future solar vapor generator design. |
| Databáze: | OpenAIRE |
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