The airfoil profile of this study is based on plant morphology, which is rarely modeled in airfoil profiling. Designing, modeling, and analyzing the aerodynamics of one of the projected morphological parts of the banana leaf midrib that forms a 45-degree angle with the longitudinal axis as a distinct new airfoil. The profile of the LM-45 airfoil has a thickness of 16.28%, a chord length of 1500mm, a Reynolds number between 3E5 and 7E5, and a wind speed between 3 and 7 meters per second. An aerodynamic analysis using QBLADE and ANSYS FLUENT determined the glide ratio and pressure distribution across the airfoil surface. LM-45 has a maximum glide ratio of 123.07 at an angle of attack of 2 degrees and a Reynolds number of 7E5, and a minimum glide ratio of 70.02 at an angle of attack of 4 degrees and a Reynolds number of 3E5. As indicated by the glide ratio, the banana leaf midrib profile can be applied to the airfoil profile for wind speeds between 3 and 7 m/s at an attack angle between 2 and 4 degrees.
<span>This paper analyzes the performance of a pico hydropower plant consisting of an axial hydro turbine integrated with a permanent magnet generator (PMG) and connected to a power converter. The proposed system is aimed to obtain a wide system operation range to gain more power captured while maintaining time-harmonic distortion in voltage (THDv) that meets the standard. The PMG specification is 1 kW, 1 phase, 235 V, 50 Hz, 83 rpm. The design and simulation of PMG were carried out by analytical and numerical calculations using FEMM 4.2. The power converter was simulated using PSIM and functions to reduce the THDv and pass the generator voltage between 50–500 V. The results show the THDv of the generating system at the upper and lower limits of the passed voltage having a THDv below 5%. Meanwhile, the PMG performance characteristics at various currents and rotations produce efficiency of 87.20% at nominal current. From these results, it can be concluded that the pico hydropower plant works well as desired.</span>
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