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Design and Experimental Testing of Savonius Wind Turbine U Three Blades Type Performance as An Alternative Energy Resource Arman, Rizky
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Publisher : Kopertis Wilayah X

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1288.995 KB)

Indonesia is famous for its potential natural resource especially energy in the form of mining, water and air. Wind energy is a natural resource that can be obtained for free of charge among the most abundant and available continuously throughout the year. The issue of energy is one of the greatest challenges facing todays society in the world. The utilization of wind energy can be used in sloping areas, mountains, and the waterfront. The principle of conversion of wind energy into electrical energy is as follows: The wind through the blades of the wind turbine spinning pinwheel cause, round lead generator wind turbine spins that into electrical energy. More than 86% of the worlds energy comes from fossil fuels, while the demand for energy worldwide continues to grow rapidly. We all know that the source of non-renewable nature of fossil energy if we only using fossil fuels as an energy source, a current source of energy will be depleted. Then the use of electrical energy derived from fossil also have an effect on the levels of emissions (CO2) in the air so called that the greenhouse effect. The application of wind energy in this study utilized as a small-scale electrical energy plant by utilizing a savonius wind turbine U three blades to generate electricity by using a generator and as a storage current battery. From design calculation results is obtained material on the blade is iron plate with a diameter of 0.6 m and bladeâs high of 0.9 m. The location for this experiment is at the area of gunung panggilun, precisely in building E on 5th floor the Faculty of Industrial Technology, Bung Hatta University.

Pengaruh Shot Peening Terhadap Kekerasan Dan Kekasaran Produk Chemical Milling Paduan Aluminium Yang Telah Di Stretching Yovial Mahyoedin; Jamasri Jamasri; Rizky Arman; Wenny Marthiana; Suryadima Suryadima
JURNAL KAJIAN TEKNIK MESIN Vol 5, No 1 (2020): Jurnal Kajian Teknik Mesin
Publisher : Universitas 17 Agustus 1945 Jakarta

AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh shot peening terhadap kekasaran permukaan produk pembuatan kimia Al 2524-T3 dan Al 2024-T3 yang telah diregangkan. Paduan ini direntangkan melampaui tegangan luluh, yaitu masing-masing 1%, 3% dan 5%, dan kemudian dilakukan proses penggilingan kimia di satu sisi. Etching yang digunakan dalam proses penggilingan kimia adalah larutan NaOH + Na2S + H2O dengan konsentrasi tertentu. Permukaan dilakukan proses shot peening dengan intensitas yang bervariasi masing-masing 0,03 A, 0,05 A dan 0,07 A. Bahan itu kemudian diuji kekasaran permukaan dan kekerasannya. Hasil penelitian menunjukkan bahwa kekasaran permukaan dan kekerasan material meningkat dengan meningkatnya intensitas peening. Namun, ketebalan Al 2524-T3, yang lebih tipis dari Al 2024-T3 menyebabkan tidak signifikannya proses peening shot yang diberikan pada material.. Kata kunci: Shot Peening, Chemical Milling, Kekerasan, Kekasaran Permukaan AbstractThis study aims to investigate the influence of shot peening on hardness and surface roughness of chemical mlling product Al 2524-T3 and Al 2024-T3 which have been stretched. These alloys were stretched beyond yield stress, namely 1%, 3% and 5% of each, and then performed chemical milling process of one side. The etching used in chemical milling process were NaOH+Na2S+H2O solutions with certain concentration. The surface was performed shot peening process with varying intensity of 0.03 A, 0.05 A and 0.07 A respectively. The material were then tested its surface roughness and hardness. The results show that surface roughness and hardness of material increases with the increase of peening intensity. However, the thickness of Al 2524–T3, which is thinner than Al 2024-T3 causing insignificance of the shot peening process given to the materials. Keywords: Shot Peening, Chemical Milling, Hardness, Surface Roughness

Kekuatan Tarik Paduan Al 2024-T3 Dan Al 2524-T3 Yang Telah Mengalami Proses Stretching, Chemical Milling Dan Shot Peening Yovial Mahyoedin; Jamasri Jamasri; Wenny Marthiana; Duskiardi Duskiardi; Rizky Arman
JURNAL KAJIAN TEKNIK MESIN Vol 5, No 2 (2020): JURNAL KAJIAN TEKNIK MESIN
Publisher : Universitas 17 Agustus 1945 Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52447/jktm.v5i2.4213

AbstrakPenelitian ini bertujuan untuk mengetahui perilaku uji tarik produk Al 2524-T3 dan Al 2024-T3 yang mengalami proses peregangan, chemical milling dan shot peening. Paduan ini diregangkan melebihi tegangan yeildnya masing-masing 1%, 3% dan 5%, kemudian dilakukan proses chemical milling satu sisi. Etsa yang digunakan dalam proses milling kimia adalah larutan NaOH + Na2S + H2O dengan konsentrasi tertentu. Pada permukaan dilakukan proses shot peening dengan variasi intensitas masing-masing 0,03 A, 0,05 A dan 0,07 A. Material tersebut kemudian diuji sifat mekaniknya dengan uji tarik. Hasil penelitian menunjukkan bahwa tegangan ultimate dan tegangan yield material meningkat dengan meningkatnya persentase regangan. Namun, perpanjangan juga meningkat yang menunjukkan bahwa proses peregangan justru meningkatkan keuletan. Di sisi lain, proses shot peening menurunkan elongasi yang mengindikasikan bahwa proses shot peening menyebabkan penurunan keuletan material. Kata kunci: pengujian tarik, chemical milling, shot peening, stretchingAbstractThis study aims to investigate the tensile test behaviour of Al 2524-T3 and Al 2024-T3 product, which undergoes stretching, chemical milling and shot peening processes. These alloys were stretched beyond yield stress, namely 1%, 3% and 5% of each, and then performed chemical milling process of one side. The etching used in chemical milling process were NaOH+Na2S+H2O solutions with certain concentration. The surface was performed shot peening process with varying intensity of 0.03 A, 0.05 A and 0.07 A respectively. The material then tested its mechanical properties by tensile test. The results show that ultimate and yield stress of material increases with the increase of stretching percentage. However, the elongation has also increased which indicates that stretching process actually increases the ductility. On the other hand, the shot peening process decreases the elongation which indicates that the shot peening process causes a reduction in the ductility of the material. Keywords: tensile tes, chemical milling, shot peening, stretching

Studi Prediksi Analitik Posisi Bantalan (Journal Bearing) Pada Turbin Gas Rizky Arman; Yovial Mahyoedin
JURNAL KAJIAN TEKNIK MESIN Vol 6, No 1 (2021): Jurnal Kajian Teknik Mesin
Publisher : Universitas 17 Agustus 1945 Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52447/jktm.v6i1.4516

AbstrakBantalan menyediakan antarmuka utama antara bagian-bagian mesin yang bergerak dan tidak bergerak. Bantalan memberikan sebagian besar kekakuan dan redaman untuk struktur yang bergerak. Dapat dimengerti bahwa gaya dinamis yang dikembangkan pada bagian yang bergerak ditransmisikan ke bagian stasioner melalui bantalan penyangga utama ini. Gaya tersebut dapat berupa beban radial statis karena berat rotor, atau mungkin gaya dinamis karena mekanisme seperti ketidakseimbangan massa. Dalam kedua kasus tersebut, bantalan radial harus membawa beban yang diterapkan, atau mesin akan mengalami kegagalan. Dalam kebanyakan kasus, secara teknis sulit (jika bukan tidak mungkin) untuk secara langsung memeriksa validitas atau akurasi dari koefisien bantalan yang dihitung. Namun, setiap perhitungan harus diakhiri dengan keseimbangan gaya, ditambah keseimbangan posisi jurnal dalam jarak bebas bantalan. Karena jurnal dalam bantalan film-oli dapat diukur secara langsung dengan proximity probes, logis untuk melakukan pemeriksaan prediksi analitik versus data mesin yang sebenarnya. Proximity probe sensorik dipasang pada ± 450 dari garis tengah vertikal sebenarnya. Pada bantalan ujung saluran masuk turbin # 1, probe dipasang di atas poros. Sebaliknya, di exhaust # 2 bantalan, probe terletak di bawah poros. Untuk penelitian pada kasus ini dilakukan pada empat turbin gas poros tunggal yang beroperasi antara 5.000 dan 5.350 RPM. Unit ini memiliki daya 40.000 HP, dan digunakan untuk menggerakkan kompresor sentrifugal bertekanan tinggi melalui satu kotak roda gigi heliks. Dapat dimengerti bahwa jika posisi eksentrisitas yang dihitung benar, maka parameter yang dihitung lainnya juga mewakili karakteristik bantalan. Kata kunci: journal bearing, turbin gas, proximity probe, posisi eksentrisitas. Abstract Bearings provide the primary interface between the moving and the stationary parts of a machine. Although the seal and the process fluids (or magnetic fields) coexist, the bearings provide the majority of the stiffness and damping for the moving assembly. It is understandable that dynamic forces developed on the moving part are transmitted to the stationary part across these main support bearings. The forces may be the static radial loads due to the rotor weight, or they may be dynamic forces due to mechanisms such as mass unbalance. In either case, the radial bearings must carry the applied loads, or the machine will fail. In most cases, it is technically difficult (if not impossible) to directly check the validity or accuracy of the computed bearing coefficients. However, each calculation must conclude with a force balance, plus a position balance of the journal within the bearing clearance. For this case history, consider a group of four single shaft gas turbines that operate between 5,000 and 5,350 RPM. These units are rated at 40,000 HP, and they are used to drive high pressure centrifugal compressors through a single helical gear box. The shaft sensing proximity probes are mounted at ±450 from the true vertical centerline. At turbine inlet end#1 bearing, the probes are mounted above the shaft. Conversely, at the exhaust end #2 bearing, the probes are located below the shaft. Since journal within an oil film bearing can be measured directly with proximity probes, it is logical perform a check of the analytical prediction versus actual machine data. It is reasonable to believe that if the calculated eccentricity position is correct, than the other computed parameters are also representative of the bearing characteristics. Keywords: journal bearing, gas turbine, proximity probes, eccentricity position.

Karakteristik Reologi Komposit Serbuk Cangkang Kemiri dan Poliuretan Yovial Mahyoedin; Kurnia Harlina Dewi; Wenny Marthiana; Rizky Arman; Ridho Azhari
JURNAL KAJIAN TEKNIK MESIN Vol 4, No 1 (2019): Jurnal Kajian Teknik Mesin
Publisher : Universitas 17 Agustus 1945 Jakarta

AbstrakPenelitian ini bertujuan menentukan karakteristik reologi komposit serbuk cangkang kemiri (SCK) berukuran 45µm<d<75µm dan resin Poliuretan (PU) dengan komposisi bervariasi, yaitu 5%:95%, 10%:90%, 15%:85%. Pencampuran SCK dan PU dilakukan dengan mechanical mixer dengan kecepatan dan lama pengadukan masing-masing 10, 15 dan 20 menit dan 100, 200 dan 250 rpm. Reologi komposit diperoleh dengan pengujian rotational viscometer dan dioptimasi dengan metoda Taguchi. Penelitian menunjukkan viskositas terkecil 218,66 mPa.s, ditemukan pada komposit dengan komposisi 5% 95%, waktu pengadukan 15 menit dan kecepatan pengadukan 100 rpm. Kata kunci: Serbuk cangkang kemiri, Poliuretan, Viskositas, Reologi. Abstract This study aimed to determine the composite rheological characteristics of candlenut shells (SCK) with particle size of 45µm <d <75µm and polyurethane (PU) resins with varying compositions, namely 5%: 95%, 10%: 90%, 15%: 85%. Mixing of SCK and PU is carried out using mechanical mixers with a speed and stirring time of 10, 15 and 20 minutes and 100, 200 and 250 rpm, respectively. Composite rheology was obtained by rotational viscometer testing and optimized by the Taguchi method. The results showed the smallest viscosity of 218.66 mPa.s, found in composites with a composition of 5% 95%, stirring time of 15 minutes and stirring speed of 100 rpm. Keywords: candlenut shell, polyurethane, viscosity, rheology

STUDI ALIRAN AIR PADA BALL VALVE DAN BUTTERFLY VALVE MENGGUNAKAN METODE SIMULASI COMPUTATIONAL FLUID DYNAMICS Rizky Arman; Yovial Mahyoedin; Kaidir Kaidir; Nando Desilpa
JURNAL KAJIAN TEKNIK MESIN Vol 4, No 1 (2019): Jurnal Kajian Teknik Mesin
Publisher : Universitas 17 Agustus 1945 Jakarta

ABSTRAKValve adalah alat mekanis yang mengatur aliran atau tekanan cairan. Fungsinya adalah menutup atau membuka aliran, mengontrol laju aliran, mengalihkan aliran, mencegah aliran balik, mengontrol tekanan, atau mengurangi tekanan. Masalah yang umumnya ditemui adalah penutupan valve tidak sempurna dikarenakan adanya kotoran-kotoran yang menghalangi penutupnya untuk menutup secara sempurna. Penanganannya yang paling sederhana yaitu membersihkan dudukan dari kotoran-kotoran tadi secara intensif dan dilakukan pelumasan. Penelitian ini bertujuan untuk menjelaskan gambaran tentang simulasi aliran pada ball valve dan butterfly valve. Dan menjelaskan perbandingan tekanan, temperatur dan kecepatan distribusi air pada dua jenis valve. Tekanan fluida pada kondisi tertutup berbeda dengan kondisi terbuka. Hal ini akan berdampak terhadap kekuatan ball valve dan butterfly valve. Tekanan yang besar atau melebihi spesifikasi akan mempengaruhi mekanisme kerja dan kekuatan material. Pengaruh tekanan ini menjadi sangat penting dalam ball valve dan butterfly valve karena tekanan fluida dengan temperatur, pada kondisi tertentu bisa di luar batas spesifikasi khususnya pada ball valve Sanitary SS316 Mounting Pad 3 inci dan butterfly valve Sanitary SS 304 3 inci. Metode yang digunakan adalah Computational Fluid Dynamics dengan bantuan Software Flow Simulasi Solidwork 2014.Kata Kunci: Ball and Butterfly Valve, Solidwork, Flow Simulasi, CFD, Tekanan, Temperatur, Kecepatan aliran. ABSTRACTValves are mechanical devices that regulate fluid flow or pressure. Its function can close or open the flow, control the flow rate, divert flow, prevent backflow, control pressure, or reduce pressure. The problem commonly encountered is that the valve closure is not perfect due to the impurities that prevent the cover from closing completely. The simplest handling is to clean the holder from the dirts earlier and do lubrication. This study aims to explain the description of the flow simulation on ball valve and butterfly valve. This study also explain the comparison of pressure, temperature and velocity of water distribution in two types of valve heads. Fluid pressure under closed conditions is different from opening conditions. This will affect the strength of the ball valve and butterfly valve as a valve. Pressure that is large or exceeds specifications will affect the working mechanism and material strength. The effect of this pressure becomes very important in the ball valve and butterfly valve because of fluid pressure with temperature under certain conditions it can be out of the specification limits, especially in Sanitary SS316 Mounting Pad 3-inch ball valve and SS 304 3 inch Sanitary butterfly valve. This method was used in research is Computational Fluid Dynamics by utilizing of Flow Simulation Solidwork 2014 Software.Keywords: Ball Valve, Butterfly Valve, Solidwork 2014, Flow Simulation, CFD, Pressure, Temperature, Velocity

Analisis Simulasi Kinematik Mesin Gergaji Dengan Metode Bilangan Kompleks Rizky Arman; Yovial Mahyoedin
JURNAL KAJIAN TEKNIK MESIN Vol 5, No 2 (2020): JURNAL KAJIAN TEKNIK MESIN
Publisher : Universitas 17 Agustus 1945 Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52447/jktm.v5i2.4216

AbstrakAKinematika dan dinamika mesin melibatkan desain mesin atas dasar kebutuhan gerak mereka. Kombinasi bagian yang saling berhubungan memiliki gerakan yang pasti dan mampu melakukan pekerjaan yang berguna dapat disebut mesin. Mekanisme adalah komponen dari mesin yang terdiri dari dua atau lebih badan diatur sedemikian rupa sehingga gerakan satu memaksa gerakan yang lain. Desain kereta listrik otomotif (sejenis mesin) sangat ditentukan oleh beberapa mekanisme, termasuk hubungan slider-engkol, cam dan follower hubungan, dan kereta gigi. Banyak mekanisme yang melibatkan gerak planar, gerak dalam satu pesawat atau di aset bidang sejajar. Kasus yang lebih umum, gerak spasial, berlaku untuk mekanisme di mana gerakan harus dijelaskan dalam tiga dimensi. Analisis kinematika dilakukan di bawah grafis pada umumnya, seperti metode poligon yang menangkap mekanisme dalam satu saat. Cara alternatif lain untuk masalah ini adalah melibatkan metode matematika. Solusi ini memberikan cara yang akurat dan tercepat karena didukung oleh teknologi komputer. Tujuan dari proyek ini adalah untuk menentukan rumus untuk posisi, kecepatan, dan pernyataan percepatan mesin gergaji dengan menggunakan Mathlab. Kata kunci: mekanisme, gerak (posisi, kecepatan dan percepatan), metode poligon AbstractKinematics and dynamics of machinery involve the design of machines on the basis of their motion requirements. A combination of interrelated parts having definite motions and capable of performing useful work may be called a machine. A mechanism is a component of a machine consisting of two or more bodies arranged so that the motion of one compels the motion of the others. The design of an automotive power train (a type of machine) is concerned with several mechanism, including slider-crank linkages, cam and follower linkages, and gear trains. Many mechanisms undergo planar motion, motion in a single plane or in asset of parallel planes. The more general case, spatial motion, applies to mechanism in which the motion must be described in three dimensions. Kinematics analysis is done under graphically in general, such as polygon method which capture the mechanism in one moment. Another way to alternate this problem is involve any mathematical method. This solution gave the accurate and fastest way because supported by computer technology. The aim of this project is to determine the formula for position, velocity, and acceleration statement of the sawing machine by using Mathlab.Keywords: mechanism, motion (position, velocity and acceleration), polygon method

Pengujian Getaran Dengan Eksitasi Kejut Dan Random Pada Komponen Struktur Dengan Profil Pelat Aluminium Rizky Arman; Yovial Mahyoedin; Wenny Marthiana; Duskiardi Duskiardi
JURNAL KAJIAN TEKNIK MESIN Vol 5, No 1 (2020): Jurnal Kajian Teknik Mesin
Publisher : Universitas 17 Agustus 1945 Jakarta

Experimental vibration analysis to determine the dynamic behavior of the vibration system is observed from the response of the system to the stimulus acting on it. In this case the relationship between the stimulus at a certain location and direction is specifically related to the response at a certain location and direction. The relationship between stimulus and response is called the Frequency Response Function (FRF) or better known as the transfer function. In measuring the transfer function, the stimulus to the structure is given in the form of excitation force while the vibration response measurement depends on the type of sensor (transducer) used. Departing from the above problems, vibration testing is carried out on a structural model. This test uses an Aluminum beam as a specimen by using an excitation signal from the exciter and impact hammer. The response signal comes from the accelerometer, while the excitation force signal comes from two different type transducers.

Karakterisasi Fisik dan Mekanik Papan Komposit Serat Kelapa dan Limbah Plastik Pet Mengacu pada Standar SNI 03-2105-2006 OKTA VIANO, RIO; Marthiana, Wenny; Arman, Rizky
Mesin Vol 30 No 2 (2025)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2025.30.2.1

This study aims to determine the physical and mechanical properties of composite board (density, moisture content, thickness swelling, elastic modulus and fracture modulus) of coconut fiber and PET polyethylene etilen terephalate plastic waste by referring to the SNI 03-2105-2006 standard with four comparison of coconut fiber composition : PET plastic : 157 yukalac resin (0:0:100; 5:5:90; 10:10:80; and 20:20:60) %. This research was conducted by varying the composition of coconut fiber, PET plastic and 157 yukalac resin, then tested the physical properties and mechanical properties of the composite board, the test parameters were density, moisture content ranged from 1.1026 to 1.1419 gr/cm³, moisture content ranged from 0.7379 to 2.3597 %, thickness development ranged from 0.326 to 0.602 %, the modulus of elasticity ranged from 5,566.71 to 34,317.48 kgf/cm², and the fracture modulus ranged from 153.34 kgf/cm² to 447.02 kgf/cm². The conclusion from the results of the tests carried out is that the more coconut fiber and PET plastic are added, the better the physical and mechanical properties are, in general the resulting composite board meets SNI 03-2105-2006 standards except for density.

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