Solar Carboreduction of Alumina under Vacuum

Experimental Investigation of the Thermal Performance of Vacuum Tube Solar Collectors (VTSC) Using Alumina Nanofluids

The enhancement of the thermal performance of Vacuum Tube Solar Collectors (VTSC) was studied by using alumina nanofluid as working fluid. VTSC is a simple and commonly utilized type of collector. This study established the heat transfer experimental model of all glass VTSCs used in a forced-circulation solar water heating system using alumina nanofluid as base fluid. Al2O3 (with an average par...

Passive Vacuum Solar Flash Desalination

Optical characterization of porous alumina from vacuum ultraviolet to midinfrared

Porous alumina was fabricated and optically characterized over a wide spectral range. Layers were formed electrochemically in oxalic acid solution from 10-mm-thick aluminum films evaporated onto silicon wafers. The layer formation was monitored with in situ spectroscopic ellipsometry in the visible and near-infrared wavelength range to accurately determine the thickness and dielectric functions...

Quasi-vacuum solar neutrino oscillations

We discuss in detail solar neutrino oscillations with δm/E in the range [10, 10] eV/MeV. In this range, which interpolates smoothly between the so-called “just-so” and “Mikheyev-Smirnov-Wolfenstein” oscillation regimes, neutrino flavor transitions are increasingly affected by matter effects as δm/E increases. As a consequence, the usual vacuum approximation has to be improved through the matter...

Metal–Organic Framework-Functionalized Alumina Membranes for Vacuum Membrane Distillation

Nature-mimetic hydrophobic membranes with high wetting resistance have been designed for seawater desalination via vacuum membrane distillation (VMD) in this study. This is achieved through molecular engineering of metal–organic framework (MOF)-functionalized alumina surfaces. A two-step synthetic strategy was invented to design the hydrophobic membranes: (1) to intergrow MOF crystals on the al...