Solar Air Heating System With Coating And Rib Roughness On Absorber Plate: A Review

Abstract

All processes in life are fuelled by energy, which is a fundamental source of power. Large amounts of energy are needed to keep the industrial revolution running.  The majority of the world's energy needs are being satisfied by non-renewable and restricted conventional energy sources. Conventional sources of energy, in addition to their incapacity to supply our ever-increasing energy needs, are environmentally unsustainable. This is done to examine the performance based on various mass flow rate of air and sun intensity. The varied percentages of nanomaterial (0.1%, 0.2%, & 0.3%) are doped in black paint which increases the absorption of heat. The Reynolds number is changed for the fixed selective coating on absorber plate and mass flow rate. In addition, the impacts of entropy generation are explored with respect to solar radiation and ambient temperature. Thermophysical properties of nanofluids drastically altered due to size dependence of these properties. The heat transmission and thermal efficiency of a solar air heater with a V-shaped rib were evaluated statistically. Using a solar air heater with artificial roughness in the form of 30o incline ribs, thermal efficiency has been evaluated. On the upper side of the absorber surface, 15 mm and 20 mm pitches of inclined ribs were employed to create. The rib pitch values of 20 mm, and heat transmission statistics were studied for the comparison. Various geometrical aspects of the solar duct were mathematically calculated with an eye toward increasing the maximum heat transfer rate.