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All Journal AUSTENIT International Journal of Research in Vocational Studies (IJRVOCAS) MACHINERY: Jurnal Teknologi Terapan
Eka Satria Martomi
Politeknik Negeri Sriwijaya
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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KERAMIK (ADVANCE CERAMICS) SEBAGAI MATERIAL ALTERNATIF DI BIDANG KESEHATAN Fatahul Arifin; Eka Satria Martomi
AUSTENIT Vol. 1 No. 01 (2009): AUSTENIT: April 2009
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.377 KB)

Abstract

Ceramics are non-metal material and are able to meet in daily activities. Generally, ceramic have superior high temperature strength, higher hardness, lower density and lower thermal conductivity than metal. The disadvantages of ceramics as structural materials are flaws, such as cracks, voids, and inclusions. In development of ceramics can be used in medical field for instance, implant of bone or tissue of the body. Hydroaxyapatite (HAp) is one of ceramics that is applied in medical field. In natural resources HAp is easy to find in every place in the world. The advantage of ceramics is bio- comfortable and disadvantages is poor fatigue properties, this material cannot be used in bulk form fro load bearing application such as orthopedics.
PENENTUAN KARAKTERISTIK MEKANIK MOTOR LISTRIK INDUKSI MENGGUNAKAN BEBAN DINAMOMETER HIDROLIK Ella Sundari; Eka Satria Martomi; Tri Widagdo; Soegeng Witjahjo
AUSTENIT Vol. 9 No. 2 (2017): AUSTENIT: Oktober 2017
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Penelitian ini memiliki tujuan umum untuk mendapatkan metode untuk mengetahui karakteristik mekanik  motor listrik induksi. Eksperimen dilakukan dengan memberikan beban kepada motor listrik uji menggunakan dinamometer yang bekerja secara hidrolik. Target khusus yang  hendak dicapai melalui penelitian ini adalah panduan pengoperasian  motor listrik induksi. Hal ini berguna bagi pengguna agar dapat mengoperasikan motor listrik secara efisien dan aman serta motor listrik memiliki usia pakai yang lebih lama. Metode penelitian yang dipergunakan adalah kaji Eksperimental dengan obyek pengujian satu unit motor lisrik Induksi dengan daya 1 Hp menggunakan listrik AC 220 Volt. Pembebanan dipergunakan pompa hidrolik yang dilengkapi dengan katup pengatur beban. Instrumen yang akan dilibatkan antara lain: tachometer, indicator gaya serta lengan momen. Untuk menjamin stabilitas kerja obyek penelitian, maka pada lengan momen juga dilengkapi komponen peredam kejut. Data-data yang dihasilkan adalah putaran poros serta momen torsi yang selanjutnya dipakai untuk menghitung daya mekanik obyek pengudalajian. Variasi data pengujian dilakukan dengan cara mengatur pembukaan katup pada dinamometer hidrolik. Data-data selanjutnya, secara statistik, dianalisis untuk mendapatkan kondisi kerja optimum dari obyek penelitian. Luaran penelitian antara lain artikel ilmiah yang akan dipublikasikan melalui jurnal nasional. Perangkat keras serta prosedur pengujian akan dijadikan modul ajar pada mata kuliah Mesin Konversi Energi untuk mahasiswa jurusan Teknik Mesin dan Teknik Energi Politeknik Negeri Sriwijaya. Dari data eksperimen, analisis statistik serta analisis kurva karakteristik diperoleh kesimpulan:-   Fungsi pendektan polynomial rodo 2 : Y = 0,000121 X2 + 0,183 X+0,582-   Koefisien Regresi, R2 = 0,983Dengan metede: turunan pertama  diperoleh :-   Daya Mekanik Optimum, Pm, opt = 756 Watt  dan-   Efisiensi maksimum, ηmaks = 69,8 %Dengan interpolasi antar data-data  dioperoleh :-   Putaran Optimum motor listrik, n0pt = 2791 rpm-   Arus optimum  motor listrik, I0pt m = 5,6 Ampere
PENGARUH PENAMBAHAN KOMPONEN SUPER CHARGER PADA MOTOR BENSIN Dwi Arnoldi; Moch Yunus; Soegeng Witjahjo; Eka Satria Martomi
AUSTENIT Vol. 9 No. 2 (2017): AUSTENIT: Oktober 2017
Publisher : Politeknik Negeri Sriwijaya, Indonesia

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Abstract

Super charger yang dimaksud pada penelitian ini adalah suatu perangkat keras yang berfungsi untuk menaikan tekanan udara memasuki intake manifold motor bakar torak. Tujuan modifikasi ini adalah untuk meningkatan prestasi mesin. Obyek penelitian adalah satu unit motor bensin 2 langkah dengan kapasitas mesin 25 cc.  Kegiatan penelitian ini akan menghasilkan perangkat keras yang dapat dioperasikan oleh mahasiswa maupun staf pengajar sebagai kegiatan praktikum maupun alat bantu mengajar (teaching aid). Penelitian ini menghasilkan juga perangkat lunak, berupa panduan/prosedur pengoperasian Super charger serta spesifikasi teknik dari prototipe mesin. Data dan konsep yang dihasilkan dari penelitian diharapkan dapat dijadikan acuan (referensi) untuk kegiatan penelitian lanjutan untuk mahasiswa maupun staf yang berminat untuk mengembangkan topik penelitian yang sejenis. Dari eksperimen serta analisis data diperoleh beberapa kesimpulan, antara lain:Ada dampak signifikan berkaitan dengan penembahan komponen super charger terhadap perubahan perfomansi motor bensin.Kondisi optimum yang dihasilkan antara lain :Daya maksimum mesin, BHPmax = 792 WattTekanan udara optimum, P0pt = 24 mm.HgPutaran Optimum mesin, Nopt = 8425 rpmPeningkatan Daya mesin sebesar 9,69 % 
Design Manufacture of Fixture Fire Fighter Kit Wirda Novarika; Fatahul Arifin; Eka Satria Martomi; Indra Gunawan; Fathur Raihan Perdana
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 3 (2021): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.782 KB) | DOI: 10.53893/ijrvocas.v1i3.58

Abstract

Forest fires are one that needs attention in Indonesia. Due to spent a lot of money to solve this problem. One of the tools to solve this problem is fire fighter, so in case is need to make the fixture can manufacture the fire fighter kit. In this study, we propose the fixture that can be produce the kit. It call fixture fire fighter kit. Autodesk inventor is applied in the simulation design and also it is considering with the ergonomic for the worker especially the Indonesian male. Finally, this tool can be resistant with load 50 kg, the deflection is 0.831 mm, and the maximum von misses stress is 34.12 MPa.
The Application of Vacuum Valve Technology as AFR Settings in 3500 Watt Electric Generator Operated by Methane Gas Tri Widagdo; Eka Satria Martomi; Ella Sundari; Selastia Yuliati
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 1 (2022): IJRVOCAS - April
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i1.97

Abstract

The scarcity of fuel oil, especially the gasoline type, is now a national problem that needs to be solved. This is caused by the rapid growth of industry and transportation. On the other hand, the problem of handling wet garbage has not been maximal, causing pollution that can disrupt health. The impact of this problem is felt also in the use of household-scale generators that operate using gasoline fuel. This study aims to convert gasoline to methane gas in the operation of a 3500 Watt Generator (Electric Generator Set). Methane gas (CH4) is obtained from the gasification process of wet waste. The method used for the AFR (Air-Fuel Ratio) regulator is the use of vacuum valve components. The use of this method cannot be separated from the easy aspects of the maintenance/repair, easy to make and cheap price. The target to be achieved in this research is to get performance data of generators operated with Methane gas fuel. The generator which is used as a research object is a generator household scale with a maximum power of 3500 Watt. Results variables to be observed among other: engine efficiency as well as optimum engine AFR generator. Furthermore, the data is compared with the data generated generator that uses gasoline fuel. This research is an experimental study, starting with the design of the vacuum valve component, followed by the installation of the component on the generator machine and ending with a machine test. The experimental data on the generator with the nominal power of 3500 Watt is: Operated by Gasoline, the optimum power, Popt is 3750 Watt, Max. efficiency, ηmax is 62.2%; AFRopt is 6.7, then operated by methane gas, optimum. power, Popt is 3270 Watt, Max efficiency, ηmax is 66,1%, AFRopt is 7,2. So, gas methane can be used to replace gasoline to operate 3500 Watt generator.
PENGARUH DIAMETER PIPA DAN LUBANG BAKAR PADA TUNGKU PEMBAKARAN TEMPURUNG KELAPA DENGAN METODE PIROLISIS Willy Alexander; Dicky Seprianto; Eka Satria Martomi
MACHINERY: Jurnal Teknologi Terapan Vol. 3 No. 2 (2022): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.6857577

Abstract

Coconut shell charcoal is a product obtained from imperfect combustion of coconut shells causing complex carbon compounds not to oxidize into carbon dioxide. This event is pyrolysis. This study aims to determine the influence of pipe diameter parameters and burn hole diameter on water content and ash content of coconut shell charcoal which test specimens are made using pyrolysis method combustion furnace. The test result data was analyzed using ANOVA with 2 FI full factorial design, using 2 factors and 2 responses modeled by Design-Expert (Trial) software. The results of the analysis revealed that the main factor that most influenced the moisture content and ash content of the test specimen was the pipe diameter factor. The contribution of the influence of pipe diameter on water content is 47% and the contribution of pipe diameter influence to ash content of 56%.
Co-Authors Dicky Seprianto Dwi Arnoldi Ella Sundari Fatahul Arifin Fathur Raihan Perdana Indra Gunawan moch yunus Selastia Yuliati Soegeng Witjahjo Tri Widagdo Willy Alexander Wirda Novarika