Abstract:

The rapid development of its technologies using renewable energy resources in recent period has led to the industry’s new process to meet increasing energy and power needs. In this study, the thermal and flow characteristics of the solar-energy air heater used more in food drying in the industry were studied. The optimal performance of the air solar collector (HGK) has been studied for two different lengths of 1400 mm and 1820 mm. The energy and exergy productivity values of both collectors are compared. The study used ANSYS FLUENT 18.1 as a numerical analysis program. Analysis was carried out in three different air flows at 0.038-0,054-0,070 kg/s and 3 dimensions (3B) respectively. The emitting plate of the air collector is trapez and the angle with the ground is 42o. From the result of the analysis, the pressure decrease of the collector is calculated. Temperature distribution, speed distribution and pressure distribution changes are shown for different hours of the day. The highest thermal output occurred at 85% to 0.070 kg/s of air flow at 13.00 p.m. As heightened heights, the thermal productivity of the collector increased. The increase in the air flow through the collector has increased the amount of useful energy, although it has lowered the output temperature. This study clearly demonstrated that different mass depth values and absorption plate sizes have a significant impact on the heat output of HGK.

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