Experimental study of jet impinging double-pass solar air heater using wire-mesh

Abstract EN

This paper manages the test examination of the Solar Air Heater (SAH)exit temperature and efficiency.

The trial test segment is planned and manufactured to study the jet impingement effect on the orber plate with wire mesh, among circular jets in a channel of SAH, and compared with traditional SAH with the jet plate.

The proposed solar air heater is tested by varying the nozzle diameter to have the values 3 mm, 5 mm, 7 mm and 9 mm while the mass flow rate of air range is 0.0147–0.0201 kg/s.

The research declared that the maximum thermal efficiency is gained at 3 mm hole ID.

The maximum thermal efficiency is 72.33% with wire mesh and 61.89% without wire mesh at the mass flow rate is 0.0201 kg/s.

The lowest performance is recorded at the 9 mm diameter hole.

The best percentage increase in efficiency of the IJDPSAH with metal wire mesh occurs at 5 mm is 29.48% .