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In many industrial applications, heat must be transferred in the form of either an energy input into the system or removal of energy produced in the system. In this study, heat transfer and flow characteristics of hexagonal finned heat sinks which optimized according to the Taguchi experimental L 18 (2 1 *3 7) design method in channel flow was analyzed numerically. Ansys-Fluent Icepak module was used in CFD analysis. The analysis carried out for two hexagonal finned optimized heat sinks in 3 different fin heights and 5 different flow velocities. Nusselt number increased with increasing Reynolds number for OH-1 and OH-2 heat sinks with all fin heights. Also, results showed that the friction factor decreased with increasing Reynolds number for all fin heights. According to CFD results, Nu-Re and f-Re variations were obtained and compared with experimental results. The experimental results and the numerical results were quite consistent.

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Greenhouse gases caused by non-renewable energy sources bring about global warming and climate change. Therefore, renewable energy sources, which are clean, economical and unlimited energy sources, come to the fore. In the numerical study carried out, a unique finned evaporator design was made to increase the efficiency of the integrated direct expansion solar-assisted heat pump systems (DX-SAHP). In the numerical analysis carried out in the ANSYS Fluent program, it was determined that the COP and electrical efficiency of the system were in good agreement with the results in the literature. As a result of the numerical analysis, COP was obtained as 3.88 and 3.60 for 0.025 kg/s and 0.050 kg/s flow rates, respectively. It was also determined that the electrical efficiency increased by 12% compared to natural convection in both flow rates.

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