Optimalisasi Daya Output Generator Pada Pico-Hydropower Menggunakan Transmisi Roda Gigi

Abstract

Generator menghasilkan listrik dengan optimal ketika sistem penggerak dari pembangkit berputar dengan arah dan kecepatan yang sesuai. Kecepatan putar sebuah pembangkit pico-hydro saat bekerja umumnya tidak sesuai dengan spesifikasi kerja dari generator. Transmisi roda gigi dapat diaplikasikan untuk menyesuaikan arah dan kecepatan putar dari pembangkit pico-hydro sesuai dengan spesifikasi kerja dari generator. Tujuan penelitian ini membandingkan kinerja pembangkit pico-hyro secara eksperimental dengan dan tanpa sebuah transmisi roda gigi. Perbandingan roda gigi input dan output 1 : 2,65, pengujian kinerja generator dengan mengukur kecepatan putar dengan tachometer, serta mengukur tegangan-arus yang mampu dihasilkan dengan multitester. Sedangkan pembebanan yang digunakan mengukur arus listrik menggunakan jumlah satu sampai tujuh buah lampu AC. Hasil penelitian ini menunjukkan kinerja generator dengan transmisi yang lebih tinggi dibandingkan tanpa transmisi roda gigi.

Analysis Of the Effect of Flow Rate and Speed on Four Blade Tubular Water Bulb-Turbine Efficiency Using Numerical Flow Simulation

“…The pressure contour on the turbine surface in static simulations can analyze the water power that can be converted into torque [11,12]and shaft power. Figure 9 shows the turbine surface pressure contour from the simulation results of this study at a turbine speed of 500 rpm.…”

“…Located in a tropical climate, alternative energy in Indonesia still has the potential to be developed, such as water energy [2], wind energy [3][4][5], biogas energy [6,7], biomass energy [8], photovoltaic [9]. Water energy or hydropower in the smallest scale category producing no more than 5 kW is called picohydro [10,11]. In its application, hydropower on a picohydro scale can be generated in a water piping system or water tubular on a horizontal flow [1].…”

“…In its application, hydropower on a picohydro scale can be generated in a water piping system or water tubular on a horizontal flow [1]. Several studies of horizontal flow picohydro applications were experimentally carried out on reference [1,12,13] using propeller turbines, whereas research using numerical simulation methods was carried out on reference [14] using drag-type turbines, and on reference [11,12] using a propeller turbine.…”

“…Propeller turbines have several advantages including practical, high performance, and relatively low manufacturing costs [16]. Several previous studies of propeller turbines in piping systems with experimental methods and numerical simulation methods show parameters that affect the performance of the propeller turbine, including bulb ratio [1,12], number of blades [12,13] dan blade angle [1,11]. Compared to the experimental method, the numerical simulation method on a water turbine is able to show a detailed and accurate flow phenomenon analysis, besides that the numerical simulation method can also support and corroborate the results of the experimental method [10].…”

“…A static bulb is placed before the propeller turbine and hereinafter referred to as the bulb turbine to increase the water flow velocity [18,19], thus potentially increasing turbine performance [16]. Several studies on static bulb turbines for the picohydro scale on horizontal flow in piping systems have been carried out in references [1,11,12], from all these studies more complex research has not been carried out on the characteristics of turbine speed (rpm) on turbine performance.…”