Thermal Analysis of Discrete W-shaped Ribs Roughened Solar Air Heater. Renewable Energy

      Аннотация: Gap between energy demand and supply is increasing day by day and fossil fuel reserves are depleting at an alarming rate, and thus, the world is looking for an alternate source of energy to fulfill the requirement of energy and bridge the gap between energy demand and supply. World energy requirement of our planet for one year may be fulfilled, if half an hour of incident total solar radiation is captured by earth. Solar thermal based applications like flat plate collectors, concentrating collectors, solar stoves etc. are easy to use and much economical. End use of solar energy includes space heating, drying, cooling, electricity generation, food cooking etc. Solar air heater is easy in design, wherein, the incident solar energy is transformed into thermal energy and is further used to heat ambient air. Flat plate SAH are low-temperature application systems and have poor thermal efficiency due to generation of boundary layer over the heated surface. Use of artificial roughness is a technique to enhance the thermal performance of simple SAH as it disturbs the laminar sub-layer and enhances local turbulence near the absorber surface.

Ключевые слова: CFD, Solar Air Heater, Thermal analysis of discrete W-shaped ribs