Thermal metastabilities in the solar core

Light - and bias - induced metastabilities in Cu ( In , Ga ) Se 2 based solar cells caused by the ( V Se - V Cu ) vacancy complex

Improvement of thermal performance of a solar chimney based on a passive solar heating system with phase-change materials

Passive solar systems such as solar chimneys need solar radiation in order to work. Therefore, they cannot present stable natural ventilation when solar energy vanishes: to have a more robust and stable condition, solar energy should be stored during the day and released back during the night. Phase change materials can save additional thermal energy during the day and release it during the nig...

Improvement of thermal performance of a solar chimney based on a passive solar heating system with phase-change materials

Passive solar systems such as solar chimneys need solar radiation in order to work. Therefore, they cannot present stable natural ventilation when solar energy vanishes: to have a more robust and stable condition, solar energy should be stored during the day and released back during the night. Phase change materials can save additional thermal energy during the day and release it during the...

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...

Nonradial thermal instabilities in the solar core, revisited

Mechanisms which produce a mixing in the solar core, based on the original idea of the “solar spoon” (Dilke & Gough 1972), for explaining the neutrino problem have recently been ruled out by Bahcall & Kumar (1993). We therefore revisit the original work of Rosenbluth & Bahcall (1973) on the nonspherical thermal instabilities in the solar core, introducing some improvements. The authors found th...