Enhancement of solar vapor generation by a 3D hierarchical heat trapping structure
| Autor: | Hucheng Song, Jun Xu, Sheng Wang, Jingjing Liu, Xiaoying Song, Kunji Chen, Lin Zhou |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment business.industry Graphene 02 engineering and technology General Chemistry Trapping 021001 nanoscience & nanotechnology Thermal energy storage Solar energy law.invention law General Materials Science Irradiation 0210 nano-technology Process engineering business Hierarchical design Evaporator Efficient energy use |
| Zdroj: | Journal of Materials Chemistry A. 7:26496-26503 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c9ta09554c |
| Popis: | Solar vapor generation is an efficient way to use solar energy for seawater desalination and sewage purification. The efficient utilization of solar-generated heat is a critical and hot topic for developing one-sun driven highly efficient solar vapor generation devices. Here, we reported a three-dimensional graphene-based hive (GBH) solar evaporator that can ensure efficient heat utilization by hierarchical heat trapping and efficient heat localization and reflux as well as long-term heat storage. As a result, a significant efficiency improvement (∼9%) was demonstrated in the 3D GBH evaporator from the initial 1.95 kg m−2 h−1 (corresponding to an energy efficiency of ∼85%) to the subsequent 2.13 kg m−2 h−1. In addition, the GBH evaporator exhibited an excellent water evaporation performance under discontinuous irradiation that is 81% of that achieved by continuous solar irradiation for one hour at 1 kW m−2. The promising 3D hierarchical design offers efficient heat trapping, localization, and reflux as well as long-term heat storage which make it easy to develop highly efficient solar vapor generation devices for sunny and cloudy days. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|