Performance enhancement analysis of triangular solar air heater coated with nanomaterial embedded in black paint

• Main Authors: Kumar, Rahul, Kumar Verma, Sujit, Kumar Sharma, Vikas
• Format: Conference Proceeding
• Language: English
• Subjects: Absorber plate coating; Graphene nanomaterial; Selective coating; Thermal efficiency; Triangular solar air heater
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2020.02.538

Solar energy plays a very essential role in the drying purpose and for heating the buildings. In an experimental setup, the heat transfer takes place from the glazing plate to two absorber plate of a triangular solar air heater. The complete inner wall of the two absorber plate was heated consistently, while their external surface is thermally insulated, therefore absorber plate coating is fabricated by 1% graphene nanomaterial into the black paint. To enhance performance, the solar selective coating should be used. The work focus on an analytical and numerical investigation related to the efficiency of a triangular solar air heater during day hours and a comparison of efficiency with or without new solar selective coating. The parameters which are calculated in this investigation glass temperature, absorber plate mean temperature and efficiency. The maximum rise in efficiency is 43.15% for black paint coating and 48.23% for 1% graphene nanomaterial in black paint coating at the time of 12 h for the air velocity 1 m/s. TSAH with new material coating on the absorber plate shows higher thermal efficiency.