Özet:

Increases in the world population directly affect the demands for energy. There is a search for different energy sources in order to respond to energy demands that are directly affected by population growth and to ensure a sustainable future. Electricity production and thermal applications from solar energy, the most basic of renewable energy sources that have become popular recently, continue to progress. In this study, it was aimed to increase the performance of solar air heaters used to obtain thermal energy from solar energy, and solar air heater models with different absorbent surfaces were developed. The analyzes of these developed models were carried out with the Computational Fluid Dynamics (CFD) approach and the results were evaluated. Initially, a conventional flat absorber plate solar air heater was modeled. Then, 2, 4 and 8 holes were added to the flat plate, respectively, and system analyzes were carried out under the same conditions. As a result of these analyses, pressure drops at similar rates were observed and air flow rates decreased at a very similar rate. In addition, the temperature differences between the inlet and outlet points were obtained as 12.6℃, 10℃, 13.5℃ and 16.2℃ for the flat plate, 2-hole, 4-hole and 8-hole model, respectively. Based on the results obtained, it has been observed that the system performance increases with the number of holes and that the holes created significantly improve heat transfer by creating a turbulence effect.

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