Browsing by Author "Ayca, Sumeyya"

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A Case Study on Piezoelectric Energy Harvesting With Using Vortex Generator Plate Modeling for Fluids
(Pergamon-elsevier Science Ltd, 2020) Yayla, Sedat; Ayca, Sumeyya; Oruc, Mehmet
In parallel with the increasing population and prosperity level with the advancement of technology and science, the need for energy is increasing day by day, and alternative energy production methods are being explored to meet increased energy need. In this study, it is aimed to produce electrical energy through vibrations created in piezoelectric material by placing turbulent plates in a closed system flow channel and increasing turbulence intensity. Vortex generating plates with nozzles of different angles and diameters are designed in 3 dimensional (3D), and the vortex intensities of these vortex generating plates were determined experimentally. Then, the experimental data obtained were simulated using the CFD (Computational Flow Dynamics) program. In this study, it was observed that the best energy harvest efficiency was obtained with the piezoelectric material positioned vertically in the number of 30825 Reynolds. When the distance between the piezoelectric material and the vortex generator plate was 80 mm, 16.5 J/kg Turbulent Kinetic Energy and 0.023 V were obtained. With the development of these methods and tools, it is expected that a more efficient electrical energy harvest will be obtained in the future. (C) 2020 Elsevier Ltd. All rights reserved.
An Experimental and Numerical Study for Energy Harvesting With Piezoelectricity in Rivers
(Acad Sci Czech Republic, inst thermomechanics, 2022) Yayla, Sedat; Ayca, Sumeyya; Oruc, Mehmet
This work is concerned with finding the optimal nozzle length for a piezoelectric harvester. Studies are carried out experimentally and numerically. First, the optimum Reynolds number is found. It was then numerically studied to find the optimum nozzle length. As a result, the most efficient design is produced and studied experimentally. The results found are compared. The "target function" is to find the best turbulent kinetic energy at the appropriate nozzle length.
Vortex Generator Design for Electrical Energy Harvesting With Piezoelectric in Rivers
(Gazi Univ, 2021) Yayla, Sedat; Ayca, Sumeyya; Oruc, Mehmet
Nowadays, technology and progress in parallel with the energy needs of the increasing population and affluence are increasing day by day with the science and alternative energy production methods are investigated to meet the growing energy needs. To find solutions to the growing energy needs in this study; closed system flow channel plates inserted into the vortex generators establishing a turbulent flow of electricity from the piezoelectric material generated vibration is to be developed. Within the scope of the specified study; vertically in the design of the turbulence value of fluid through the vortex generators made four different Reynolds number can be increased and the channel plate eluted with a piezoelectric material disposed of in two different distances. The results of the experimental studies designed and produced with the vortex generating plate were obtained numerically with the HAD (Computational Fluid Dynamics) simulation program and thus, the boundary conditions for the numerical studies on the same subject were defined after this study. As a result of this study; it was observed that the best energy harvesting efficiency was obtained with the piezoelectric material positioned vertically at the number of 30825 Reynolds and when the distance between the piezoelectric material and the vortex generator plate was 65 mm, the value of 0.017 V voltage and 4.82 J / kg Turbulent Kinetic Energy value was obtained.