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Artikel Jurnal
Pengaruh Variasi Ukuran Bola Baja pada Proses Dry Shot Peening terhadap Mikrostruktur dan Kekerasan Material Implan AISI 316L
AISI 316L is a type of 316 austenitic stainless steel with characteristic very low carbon content. This material contains several elements such as molybdenum-chromium-nickel which are aimed to improve the corrosion and oxidation resistances at high temperature applications. The low carbon content…
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Artikel Jurnal
Pengaruh Hardening dengan Media Quenching Fluida Getah Pohon Pisang terhadap Struktur Mikro dan Komposisi Kimia Baja Karbon Sedang
The purpose of this study was to determine how the chemical composition and microstructure formed in medium carbon steel hardened with banana tree sap fluid compared to oil and water. The process of carbon steel hardening is being heated to the austenite area (850oC ) then held for 10 minutes after…
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Artikel Jurnal
Pengaruh Woven Angle dan Proses Penekanan terhadap Tegangan Tarik pada Natural Fiber Laminate Composite
The aim of this study is to investigate the effects of pressure and woven angle on the tensile strength of natural fiber laminate composite. Pandanus tectorius and polymethyl methacrylate (PMMA) was used as natural fiber and matrix, respectively. The epoxy adhesive joint is used to connect between…
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Artikel Jurnal
The Effect of Inner Fan Blade Angle to The Ventilation Rate of The Turbine Ventilator
Geographical location of Indonesia country has relative wind speed lower than the countries of turbine user e.g. Finland, United States of America, and other countries. Turbine ventilator can be used as ventilation within wind energy driver. The turbine ventilator generates drag force and causes…
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Artikel Jurnal
Pengaruh Penggunaan Fan dan Debit Fluida terhadap Efisiensi Kerja Atmospheric Water Generator
The purposes of this study are to investigate the effect of condenser cooling fan addition and airflow rate on the performance of Atmospheric Water Generator (AWG). In this work, humid air from the environment was supplied into AWG at 15 lpm. Then, it was condensed in the system with and without…
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Artikel Jurnal
Identifikasi Komposisi Kimia Tar Kayu Mahoni untuk Biofuel pada Berbagai Temperatur Pirolisis
This study indentified the tar yield of pyrolysis of mahogany wood. The produced tar would be analyzed using GC-MS (Gas Chromatograph-Mass Spectrometry) to understand their chemical properties affected by temperature pyrolysis. It would be identified if the elements are flammable matters or not. It…
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Artikel Jurnal
Analisis Thermal Nilai Kalor Briket Ampas Batang Tebu dan Serbuk Gergaji
Availability of fossil fuels are increasingly rare, result in rising fuel prices. Hence, alternative fuel needs to be examined. In this study a mixed composition of bagasse charcoal and sawdust used. The two material then mixed with starch adhesives to produce briquettes with different…
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Artikel Jurnal
Performansi Alat Penukar Kalor Udara-Tanah (Earth-Air Heat Exchanger) dengan Siklus Terbuka di Kota Medan
The purpose of this study was to obtain the performance of an EAHE (earth air heat exchanger) with weather conditions in the Medan city. The research method carried out was experimental in the field for several days with varying weather conditions. The air conditioning system using an Air-Earth…
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Artikel Jurnal
Analisis Pengaruh Holding Time terhadap Sifat Mekanis dan Struktur Mikro pada Proses Induction Tempering Batang Piston Baja SCM 420 H
Selection of materials connecting rod for a component or structure usually involves several aspects, there are aspects of specific strength, stiffness, lightweight, noncorrosive materials and resistance or age. In the manufacturing process connecting rod always give heat treatment such as…
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Artikel Jurnal
Pitting Depth Prediction Caused by SRB using Empirical Equation
Microbiologically influenced corrosion (MIC) is a serious problem in the oil and gas industry. The most common microorganism responsible for MIC is sulfate-reducing bacteria (SRB) which produces detrimental sulfide ions into the environment. Currently, there are some prediction models that develop…
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Artikel Jurnal
Sifat Mekanis dan Struktur Mikro pada Sambungan Las Gesek Baja SCM415H untuk Aplikasi Poros Roda Belakang
This research aims to evaluate the mechanical properties and microstructure of steel alloy SCM415H processed by friction welding for rear axle shaft application. Friction welding is a process to connect materials without using fillers and has a good quality of joint strength. Two different…
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Artikel Jurnal
Ekstraksi Parameter Statistik Domain Waktu dan Domain Frekuensi untuk Mendeteksi Kavitasi pada Pompa Sentrifugal Berbasis Principal Component Analysis (PCA)
Cavitation phenomenon frequently occurs on the centrifugal pump which may decrease its performance. It may cause a catastrophic failure which leads to a total breakdown of the piping system if the presence of cavitation is not immediately detected and solved. Recently, the popular method used to…
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Artikel Jurnal
Unjuk Kerja Kotak Pendingin Peltier dengan Unit Pembuang Panas Heat Sink Fin-Fan dan Double Fan Heat Pipe
Nowadays, technology is growing rapidly. A refrigerator is one of the technology applications by using heat transfer phenomena. However, the existing refrigerators in big size, need large power, and able to damage the ozone because most of the refrigerators utilize CFC. It is necessary to create a…
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Artikel Jurnal
Pengaruh Lip Thickness Turncated Nozzle Sudut Luar terhadap Karakteristik Api Difusi Concentric Jet Flow
Diffusion combustion is a daily combustion process where is often used primarily in industrial systems. An optimal burner design is needed to get more efficient combustion results. Then the shape of the burner nozzle greatly affects the turbulence between the fuel and air which forms the flow…
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Artikel Jurnal
Pengaruh Fraksi Volume Serat Empulur Sagu (Metroxylon sp) dan Presentase Alkali terhadap Pengujian Impak serta Absorpsi Air pada Komposit Berserat Sagu
Human necessities for good material to support daily activity are growing up, especially eco-friendly material. Applications such as decoration, interior, until the furniture increased along with the population growth. Sago (Metroxylon sp) as one of the plants and also as one of the staple food in…
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Artikel Jurnal
Rancang Bangun Solar Dryer untuk Meningkatkan Kualitas Refuse Derived Fuels (RDF) sebagai Bahan Bakar Alternatif di Kiln Burner Industri Semen
To utilize the municipal solid waste (MSW), PT Semen Indonesia has a program to convert waste into three useful products. One of the product is named Refuse Derived Fuel (RDF). The RDF has claimed that it had a caloric value about 5178 kcal/kg. However, currently, RDF could not be used for the…
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Artikel Jurnal
Pengaruh Penambahan Nanokatalis MnFe2O4 Terhadap Proses Pirolisis Sampah Plastik HDPE
The effects of MnFe2O4 nanocatalyst addition toward HDPE plastic waste pyrolysis have been investigated by performing experiments on METTLER TOLEDE TGA DSC1 Simultaneous Thermal Analyzer at heating rates of 10oC/min by nitrogen and temperatures range from room temperature to 1000oC. The results of…
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Artikel Jurnal
Pengaruh Temperatur terhadap Laju Reaksi Tar Hasil Pirolisis Serbuk Kayu Mahoni pada Rotary Kiln
Pyrolysis is a thermochemical process chemical decomposition of organic substances through the heating process without oxygen. It produced char, tar, and gas. Rotary kiln Pyrolysis is horizontal stove with biomass that being moved in certain rotary along the stove. Biomass particle movement in…
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Artikel Jurnal
Kinematic and Singularity Analysis of PRoM-120 – A Parallel Robotic Manipulator with 2-PRU/PRS Kinematic Chains
PRoM-120 was a parallel robotic manipulator which constructed by 2-PRU/PRS kinematic chains. The mobility of this manipulator was 3 DOF, i.e. 1 translational DOF, and 2 rotational DOF (1T2R). The objective of this research was to analyze kinematic, and singularity of PRoM-120 based on its…
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Artikel Jurnal
Sintesis Karbon Aktif Berbahan Dasar Mikroalga Chlorella vulgaris Menggunakan Aktivator KOH dan Iradiasi Gelombang Mikro
Microalgae Chlorella vulgaris has been used as a raw material in the synthesis of powdered activated carbon. Dry microalgae was pyrolyzed at a temperature of 500oC for 30 minutes to obtain microalgae charcoal. The combination of chemical activation treatment using KOH with concentrations of 10, 30…