EXERGETIC AND ENERGETIC EVALUATION OF AN INNOVATIVE SOLAR AIR HEATING SYSTEM COATED WITH GRAPHENE AND COPPER OXIDE NANO-PARTICLES

In the 21th century, renewable energy has to play very important role in socio-economic and industrial development. This paper evaluates exergy- analysis, which is based on second law of thermodynamics. The triangular solar heater developed determine heat transfer rate, thermal efficiency, exergy efficiency Bejan number. addition, we have examined effects entropy generation with respect radiation ambient temperature air. Absorber plates coated graphene copper oxide nano-particles by different percentages (0.1%, 0.2%, 0.3% & 0.4%) doped into black paint increases absorption heat. Reynolds number (4500?R_e?22700) varies for fixed selective coating absorber plate mass flow rate. experimental observations were performed constant rate air ranging from 0.0035kg/s 0.018 kg/s. result gives average enhancement 3.58% graphene/CuO-black paint. Entropy more 0.1% minimum coating. analysis concludes that increasing Exergy can be found 0.169%for