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All Journal Sistem : Jurnal Ilmu-Ilmu Teknik JKIE (Journal Knowledge Industrial Engineering) Jurnal Elemen Journal of Multidisciplinary Applied Natural Science
Tulus Subagyo, Tulus
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics

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ANALISA UMUR PAKAI POROS PADA PUTARAN KRITIS DENGAN MENGGUNAKAN UJI DEFLEKSI EKSPERIMENTAL (CRITICAL SPEED APPARATUS) Prasetiyo, Gatot Budy; Subagyo, Tulus
SISTEM Jurnal Ilmu Ilmu Teknik Vol 9 No 3 (2013)
Publisher : Fakultas Teknik Universitas Wisnuwardhana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.963 KB)

Abstract

Shaft (shaft) is one of the stationary part of a rotating, usually globular, which is attached elements such as gears, pulleys, gears (flywheel), crank the power transfer from the other elements. Shafts can receive materials bending, pull, press, or torsion, which work independently or be combined with each other. When the load is incorporated, we can expect to achieve static strength and fatigue strength petimbangan need for planning, because a single shaft voltages can be static, complete alternating voltage, the voltage over and over, who all work at the same time. Shaft covers a wide range of variations, such as (axle) and wave (spindle). An axle (axle) is whether the shaft is stationary or rotating is not got a torsional load. Rotating shaft is often called short wave (spindle). When the lateral deflection or twisting of the shaft must be maintained in strict limits, the shaft must be sized based on the deflection before doing an analysis of stresses. Shaft is the most important part of the machine, almost all engine power forward along with rounds. The main role in this transmission is held by a shaft, the shaft can be classified according to their shape over a common straight shaft, crank shaft as the main shaft of the engine piston and others, flexible shaft to the transmission power so that there is little freedom to change direction. With the critical speed analysis apparatus, is aimed at testing done on the useful lifetime of the shaft to improve the performance of a machine and as well informed about the losses that occur later. From the analysis we found the variation of the rotation distance of F = 2.3607 <F table = 4.256495, contrary to the variation of the magnitude of the deflection distance of F = 0.7385815 <F table = 4.256495 koeefesien the magnitude of correlation (R2) is 0.6363864 and for the deflection distance there is also a real relationship with a correlation coefficient (R2) = 0.96188. And the age of the life of the shaft in a critical condition dadalah round 193.944 minutes = 2 hours 21 minutes
ANALISIS MESIN PENGGERAK PEMBANGKIT LISTRIK DENGAN BAHAN BAKAR BIOGAS Subagyo, Tulus
SISTEM Jurnal Ilmu Ilmu Teknik Vol 10 No 3 (2014)
Publisher : Fakultas Teknik Universitas Wisnuwardhana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (175.886 KB)

Abstract

Pembangkit listrik tenaga biogas Bahan bakar utama dari motor penggerak untuk menggerakkan generator adalah biogas sebagai pengganti bahan bakar bensin. Modifikasi yang perlu dilakukan adalah dengan penggantian karburasi standar dengan karburasi buatan agar lebih mudah didalam mengatur perbandingan saluran masuk udara & biogas, selain itu juga diperlukan penggantian koil untuk memperbesar pengapian dan juga memperbesar kompresi. Dalam biogas terdapat kandungan H2S dan H2O yang dapat memperpendek umur mesin sehingga kandungan tersebut harus dikurangi dengan cara pencucian. Perbadingan bahan bakar biogas dan bahan bakar premium yang digunakan untuk menghidupkan mesin penggerak dan generator listrik, dengan mengetahui daya, torsi, dan tekanan efektif rata-rata.
ANALISIS DAN SIMULASI KINERJA (DAYA DAN EFISIENSI) PADA SUDU TURBIN ANGIN SAVONIUS VERTIKAL TIPE U DENGAN SOFTWARE sidiq, akhmad; Subagyo, Tulus
ELEMEN : JURNAL TEKNIK MESIN Vol. 10 No. 2 (2023)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v10i2.264

Abstract

Increased energy needs and environmental concerns have encouraged exploration of renewable energy sources. The research was to analyze savonius' performance and design of wind turbines as an alternative to electricity generation. Wind velocity measurement in turbines is used in anemometers, as well as in their effects on energy generation potential. In design, the study analyzes the level u wind turbine framework of dimension, geometry, voltage distribution, and material resistance. A structural and safety factor calculation is done to ensure that the turbine frame can support an anticipated load without failure. In this study computes the power extracted from the wind through the turbine. From this study produce 26.6 joules of kinetic energy and a 9.60 watt output output at an efficient rate of 5.28%.
Optimization of a Mixture of Curcuma Dye Mixture with SiO₂ (Rice Husk Waste) to the Energy Efficiency of TiO₂ -based Solar Cells Subagyo, Tulus; Widhiyanuriyawan, Denny; Widodo, Agung Sugeng; Wardana, I Nyoman Gede
Journal of Multidisciplinary Applied Natural Science Articles in Press
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.288

Abstract

Global energy challenges and environmental problems encourage the search for sustainable energy solutions, with TiO₂-based solar cells that are still limited to its efficiency due to low light absorption and charge recombination. This study aims to examine the synergistic effect of curcuma and SiO₂ dye from rice husk waste in improving the energy efficiency of TiO₂ solar cells. The research methodology involves the fabrication of sensitive solar cells with different layer compositions: TiO₂ only, TiO₂ with one layer of SiO₂ (1L-SiO₂), two layers (2L-SiO₂), and three layers (3L-SiO₂). The TiO₂ photoanode is prepared using the screen printing method, followed by loading coloring through immersion in the curcuma coloring solution. The performance of solar cells is evaluated using the current voltage measurement (I-V) and electrochemical impedance spectroscopy (EIS) to analyze efficiency, charge transportation, and recombination processes. The results show that the addition of SiO₂ increases the efficiency of solar cells, with 1L-SiO₂ producing the highest compilation of short circuit (JSC) 0.37 mA/cm², showing an increase in cargo transportation. However, 1L-SiO₂ shows a decrease in performance due to excessive thickness, which leads to an increase in charge recombination and internal resistance. Impedance analysis confirms that 1L-SiO₂ optimizes cargo transportation but also increases recombination resistance, which affects overall efficiency. Adding SiO₂ from rice husk waste increases the efficiency of TiO₂-based solar cells, with curcuma coloring increases light absorption and charge transfer. However, excessive SiO₂ layers reduce performance due to higher recombination and resistance. Further research is needed to optimize the thickness of the layer and dye stability.
ANALISIS PENGARUH SELF EFFICACY TERHADAP KEPEMIMPINAN MANAJEMEN INDUSTRI Ulum, Bakhrul; Subagyo, Tulus
Journal Knowledge Industrial Engineering (JKIE) Vol 4 No 2 (2017): JKIE (Journal Knowledge Industrial Engineering)
Publisher : Department of Industrial Engineering - Universitas Yudharta Pasuruan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35891/jkie.v4i2.1149

Abstract

Mesin penghancur daun kering adalah suatu alat yang sederhana yang dirancaang khusus untuk menghancurkan daun kering yang selanjutnya akan dijadikan pupuk kompos atau sebagai bahan campuran pupuk kompos lain. Tujuan dari perancangan ini adalah untuk membantu para petani agar dapat membuat pupuk alami dan terhindar dari bahan-bahan kimia yang ada dipasaran. Hasil penelitian didapat desain mesin penghancur daun kering dengan spesifikasi dan ukuran yang sesuai dengan kebutuhan masyarakat.
ANALISIS DAN SIMULASI KINERJA (DAYA DAN EFISIENSI) PADA SUDU TURBIN ANGIN SAVONIUS VERTIKAL TIPE U DENGAN SOFTWARE sidiq, akhmad; Subagyo, Tulus
ELEMEN : JURNAL TEKNIK MESIN Vol. 10 No. 2 (2023)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v10i2.264

Abstract

Increased energy needs and environmental concerns have encouraged exploration of renewable energy sources. The research was to analyze savonius' performance and design of wind turbines as an alternative to electricity generation. Wind velocity measurement in turbines is used in anemometers, as well as in their effects on energy generation potential. In design, the study analyzes the level u wind turbine framework of dimension, geometry, voltage distribution, and material resistance. A structural and safety factor calculation is done to ensure that the turbine frame can support an anticipated load without failure. In this study computes the power extracted from the wind through the turbine. From this study produce 26.6 joules of kinetic energy and a 9.60 watt output output at an efficient rate of 5.28%.
Co-Authors Agung Sugeng Widodo Bakhrul Ulum, Bakhrul Denny Widhiyanuriyawan Gatot Budy Prasetiyo, Gatot Budy I Nyoman Gede Wardana Sembiring, Rinawati Sidiq, Akhmad