Australian Journal of Basic and Applied Sciences

August 2023


Experimental Evaluation Of Thermal Performance A Air Flat Solar Collector

Jean Wilfrid Mayembo Mfoutou , F.C.Bakeni Moukani , Anicet Frederic Binaki , Belblonde.D.Biyendolo Loupangou , K.E.Malela ,Surprise.Moussofi Moundanga and Jean Mathurin Nzikou

ABSTRACT: Background:This article is part of the process of valuing solar energy for the conservation of agricultural products. Objective: The objective of this article is to experimentally evaluate the thermal performance of a flat solar air collector with single glazing operating in forced convection intended for heating air for drying local products. Methods: The methodology consists of following the evolution of solar irradiation, the temperature of the air at the entrance and exit of the collector, and the temperature of the absorber, thus leading to the determination of the thermal efficiency by equations found in the literature review.Results: Indeed, the curves resulting from this study all have the same pace, increasing between 7 a.m. and 2 p.m. and decreasing after 2 p.m., reaching their optimal values of 58°C, 51°C, 46°C, and 33°C, respectively, for the absorber, the air leaving the sensor, the window, and the air entering the sensor. The thermal efficiency of the solar collector varies between 0.25 and 0.57 for a speed of 2 m/s, from 0.19 to 0.54 for a speed of 1.5 m/s, and from 0.20 to 0.47 for a speed of 1 m/s. The air temperature at the sensor outlet varies from 26°C to 47°C for a speed of 2 m/s, from 30°C to 54°C for a speed of 1.5 m/s, and from 34°C to 58°C for a speed of 1 m/s. Ultimately, this article makes a contribution to the need for the integration of an auxiliary source of energy during the drying of local products. This additional source will make it possible to compensate for the energy deficits observed towards the beginning and end of the day for controlled and efficient drying.

[ FULL TEXT PDF 1-6 ] DOI: 10.22587/ajbas.2023.17.8.1