Table 1.
Comparison of several representative studies on the topic of Dew Water Harvesting
| Literature | Surface materials and configuration | Moisture provided by | RH (%) | Subcooling (°C) | Water harvesting capacity (L⋅m−2⋅h−1) | Water collection onset time |
|---|---|---|---|---|---|---|
| Bintein et al. (2019) | Epoxy/SiO2 grooves | Climatic chamber | – | – | ~0.2 | 0.4–1.3 hr |
| Jin et al. (2017) | Polymer flat surfaces | Humidifier | 100 | 17 | ~0.2 | 0.28–0.72 hr |
| Hou et al., 2020 | Patterned copper | Humidifier | ~50 | 24 | ~1.1 | – |
| Gerasopoulos et al. (2018) | Nanostructured Teflon AF & PTFE surfaces | Chamber | 98 | 27 | ~0.72 | 0.17–0.25 hr |
| Xu et al. (2020) | Porous coating layer | – | ~95 | 3–5 | ~0.13 | – |
| Trosseille et al. (2019) | Rough Duralumin alloy plates | Climatic chamber | 70 | 6.5 | ~0.15 | 0.7–1.4 hr |
| Our work | Needle-shaped Black Silicon | Climatic chamber | 70 | 10 | Early stage: ~0.1 Late stage: ~0.27 |
Near-zero |
The subcooling indicates the temperature difference between ambient air and the surface where water condensation occurs.