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All Journal AUSTENIT Machine : Jurnal Teknik Mesin MACHINERY: Jurnal Teknologi Terapan Innovative: Journal Of Social Science Research International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Engineering: Journal of Mechatronics and Education
Sundari, Ella
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Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Other

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ANALISIS PENGARUH PENAMBAHAN UNSUR MAGNESIUM TERHADAP KUAT LENGKUNG PADA MATERIAL ALUMINIUM farhan, farhan ikbar; Rasid, Muhammad; Sundari, Ella
MACHINERY Jurnal Teknologi Terapan Vol. 4 No. 1 (2023): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.7684050

Abstract

The brake handle is one of the components to restrain the vehicle's movement rate by holding the clamp mechanism, the problem that exists in the brake handle when there is a hard impact. Handles are usually made with aluminum metal material, so that aluminum has certain properties in this study combined with magnesium elements with variations of 1%, 3%, and 5%. Magnesium is the lightest chemical element among other industrial metals. The low density value and strength of magnesium is an advantage of this element as an alloy. The alloy used is a metal casting process using the sand casting method. After combining aluminum and magnesium in a bending test to get an acceptable bending strength. The percentage value of magnesium has a significant effect with a comparison of Fcount > Ftable value 72.29 > f0.0001(2;9) = 4.26. The percentage factor obtained is 87% and the maximum value is 38.08 kg/mm2 and the minimum value is 30.46 kg/mm2.
ANALISA PENGARUH PERLAKUAN ALKALI TERHADAP SIFAT MEKANIK KOMPOSIT BERPENGUAT SERAT BUAH KELAPA SAWIT Sundari, Ella; Karmin, Karmin; Putri, Fenoria; Arif Budiman
MACHINERY Jurnal Teknologi Terapan Vol. 4 No. 2 (2023): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.8048689

Abstract

Various innovations have been developed by researchers to obtain and develop new natural fibers because of its advantages. Some of the advantages of natural fibers such as excellent physical properties, abundant natural materials, do not damage the environment and lower production costs. This study aims to produce alternative natural fibers by utilizing fiber from oil palm fruit which is commonly found in South Sumatra. The research was carried out by preparing resin and catalyst with a ratio of 100 ml: 1 ml which was then poured into the mold as much as 25% and continued by arranging palm fruit fiber randomly. After 8 hours, the resulting composite material is soaked for 2 hours with NaOH alkaline liquid with variations of 0%, 5% and 7%. The mechanical properties of the palm fruit fiber composite increased after being treated with alkali, where the highest values ​​were tensile strength 22.46 N/mm2, impact strength 0.15 J/mm2 and bending strength 87.50 N/mm2 obtained at variations of alkaline NaOH of 7 %.
PERANCANGAN TURBIN ANGIN SUMBU VERTIKAL SEBAGAI PEMBANGKIT LISTRIK (SKALA LABORATORIUM) Meidian Pratama, Risco; arifin, Fatahul; Sundari, Ella; Okviyanto, Toni; Yahya, Yahya; Martomi, Eka Satria; Firdaus, Firdaus
MACHINERY Jurnal Teknologi Terapan Vol. 4 No. 3 (2023): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.10122311

Abstract

Wind is one of the newest energy sources that is becoming increasingly popular nowadays. The use of wind energy can be converted into electrical energy for wind turbine cells. However, there are two types of wind turbines, namely horizontal and vertical. Holistic wind turbines are usually used in one direction while vertical wind turbines are used in all directions. The shape of the blades and the number of wind turbine blades greatly influence the power produced. So the research this time is to find out the influence of the blade shape that has been varied and the number of blades with wind speeds of 2.5 m/s, 3 m/s, 3.5 m/s and 4 m/s on the resulting generator power so that the efficiency results What has been obtained can be designed to design wind turbines with varied blade shapes. Testing was carried out in a laboratory designed independently with a wind source using a fan and Dimmelr air conditioner. The results of tests that have been carried out have the highest gelnelratolr power known at 4 blades with a wind speed of 4 m/s with a power value of 0.34 watts while the smallest gelnelratolr power is known at 2 blades with a wind speed of 2.5 m/s with rated power 0.04 Watt. So that the research results from all the tests, the highest efficiency value was obtained at 4 blades with a wind speed of 2.5 m/s with a value of 24.4% and the lowest efficiency value was obtained at 2 blades with a wind speed of 3 m/s 6, 4 %.
Effect of Zinc (Zn) addition on Impact and Hardness Properties of Aluminium (Al) scrap Ismail, Nur Faiqa; Zulkipli, Muhammad Asyraf; Yusof, Khairul Huda; Sundari, Ella; Putri, Eresyah
International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Vol. 1 No. 1 (2023): IJMEAS - October
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijmeas.v1i1.216

Abstract

The aim of this study is to investigate the effect of zinc (Zn) material added to used aluminum (Al), which should affect its strength and hardness. In this current study, zinc material (Zn) was applied as an additional material to aluminum scrap, by mass percentages of Al 100% Zn 0%, Al 95% Zn 5%, Al 94.5% Zn 5.5%, and Al 94% Zn 6%, respectively. The results showed that the addition of zinc (Zn) had indeed affected the impact value and hardness properties of aluminum-zinc alloy (Al-Zn). The addition of zinc (Zn) at 6% yielded the highest effective strength value of 0.24 J/mm2, and the lowest effective strength value of 0.14 J/mm2. Although the highest hardness value was found by addition of 6% zinc (Zn), the average hardness was 73.76 HRB and the lowest hardness was 29.23 HRB. In conclusion, as the addition of Zinc (Zn) into the material composition increases, the impact and toughness properties of the material increases.
Optimization Design and Performance of Small-Scale Downdraft Biomass Gasification: A Case Study For Air-Fresh Inlet Homzah, Ozkar F.; Pratama, Rahmad Dandi; Sundari, Ella; Mardiana, Mardiana; Wilza, Romi
International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Vol. 1 No. 1 (2023): IJMEAS - October
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijmeas.v1i1.219

Abstract

Biomass is the term for organic compounds, both animals and plants that can be reused as fuel or energy sources. Apart from that, gasification can be interpreted as a process of changing a solid fuel into a gas through thermochemical stages. The fuel used in the downdraft biomass gasification reactor is rice husks and coconut shells. The downdraft type biomass gasification reactor design used Autodesk Inventor professional software and for simulation using Ansys-R2 for 2021 student licensed. As the results after we create modified for inlet fresh-air showed the performance test of the hot start as flame temperature was increased to 21.7°C within the highest temperature reaches to 188.4°C. As a conclusion of modified performance test, we obtained the temperatures of pot-stove are slowly reaches from 6.38°C to 41.75°C of boiling water.
STUDI PERFORMASI SUDU TURBIN ANGIN SAVONIUS TIPE VERTICAL AXIS BERBAHAN KOMPOSIT Homzah, Ozkar F.; Sundari, Ella; Sampurno, Rachmat Dwi; Utami, Ogi Meita; Rahmawati, Lily
Machine : Jurnal Teknik Mesin Vol 9 No 1 (2023): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v9i1.3317

Abstract

The increasing human population, the use of fossil energy such as oil also increases. While fossil energy is one of the largest contributors to carbon emissions that can cause climate change that can be done to control climate change is to switch to the use of renewable energy. The investigation takes the shape of a vertical axis Savonius turbine blade design. The blades are made of a composite material called carbon fiber, and the number of blades varies between 4, 6, and 8 pieces. The study's findings were tested utilizing a blower-generated wind source with wind speeds of 4m/s, 4.5m/s, and 5m/s. A wind tunnel consisting of acrylic material and pipes as a frame construction was used in the test. The test findings show that turbine blades with a total of four blades produce the maximum generator power of 0.274 watts at a wind speed of 5 m/s. Meanwhile, the turbine blade with 8 blades has the lowest output power at a wind speed of 4 m/s and a power value of 0.0028 W. Then, with 8 blades, it has a relatively low output energy compared to 4 and 6 blades. Therefore, the highest efficiency performance of wind turbine use is achieved by a turbine with a number of 4 blades with a maximum efficiency is 9,16% and the minimum efficiency it seen in a wind turbine with a number of blades 8 within 0,07%.
ANALISA PERAWATAN INTAKE PUMP DENGAN MENGGUNAKAN METODE RISK BASED MAINTENANCE (RBM) Homzah, Ozkar F.; Sundari, Ella; Yuliandi, Rizky Brillian; Sari, Femi Permata
Machine : Jurnal Teknik Mesin Vol 9 No 2 (2023): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v9i2.4352

Abstract

Intake Pump is one of the important equipment in the steam power plant of 3x10 MW electrical generator which functions to supply raw water to production of demin water, domestic water and service water. In the process of producing water through the intake pump there are several components of the intake pump that often experience damage, this can be a loss for the company, therefore requiring additional processing. In this study, the Risk Based Maintenance (RBM) method was carried out to achieve optimal maintenance by knowing the impact and risk of failure according to important intake pump components, namely impeller, bearing and shaft. Based on the analysis results of the RBM calculation, the consequences of risks accepted is low to 0.05% by the company that achieved to 221,498,196.507 Indonesian rupiah it’s to 0.13% of production capacity per year. This value exceeds the acceptance risk tolerance of 0.13% which has become a company provision. Therefore, it is necessary to plan the proposed maintenance period from the existing policy, which is carried out 48 times a year for each critical component such to reducing the number of consequences and risks to 198,002,597 Indonesian Rupiah or equal to 0.01%.
RANCANG BANGUN DAPUR PELEBURAN ALUMUNIUM BAHAN BAKAR GAS Sundari, Ella
AUSTENIT Vol. 3 No. 01 (2011): AUSTENIT: April 2011
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.869 KB)

Abstract

P ros es pe lebu ra n ad alah p ro se s pen cairan b ahan (b es i c or) den gan ja lan pemanasan di dalam sebuah dapur peleburan. Setelah bahan mencair kemudian dituang ke dalam sebuah cetakan. Pada proses peleburan alumunium digunakan dapur jenis crucible. Dapur jenis ini digunakan untuk penggunaan dalam skala kecil sedangkan untuk skala besar digunakan dapur reverberatory. Crucible yang ada dalam dapur berbentuk pot yang terbuat dari lempung dicampur dengan pasir. Terdapat tiga macam crucible menurut jenis bahan bakar, yaitu gas, minyak dan kokas. Crucible dengan bahan bakar kokas jarang digunakan karena kurang efisien. Disini digunakan dapur peleburan dengan menggunakan bahan bakar gas. Hasil pembakaran bahan bakar akan memanaskan dinding crucible yang kemudian akan dialirkan ke logam yang akan dilebur. Dengan demikian logam tidak mengalami kontak langsung dengan api pembakaran.
RANCANG BANGUN PROTOTYPE PRESS TOOL PEMOTONG SIDE RUBBER SEBAGAI KOMPONEN CHUTE DENGAN SISTEM HIDROLIK Sundari, Ella; Asrafi, Ibnu; Prabudi, Darma; Kurniawan, Dede; Saputra, Kurniawan; Nopriansyah, Agi
AUSTENIT Vol. 7 No. 2 (2015): AUSTENIT: Oktober 2015
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (860.849 KB)

Abstract

Press tool adalah alat bantu yang digunakan untuk membentuk/memotong produk dari bahan dasar lembaran yang pengoperasiannya menggunakan mesin press. Pada saat ini, proses pemotongan side rubber yang ada di lapangan masih dilakukan secara manual dengan menggunakan tenaga kerja untuk melakukan pengukuran, pengeplongan dan pemotongan dari  rubber sheet. Dari hasil penelitian didapatkan bahwa gaya potong maksimum dari press tool yang dihasilkan sebesar 6646,53 kgf dan power hidrolik yang digunakan sebesar 8357,9 kgf. Kapasitas produksi dari press tool yaitu dapat menghasilkan 1 pola dalam waktu 40,8 detik atau sekitar 88 pola side rubber dalam waktu 1 jam. Ukuran pola side rubber yang dihasilkan dengan pengerjaan menggunakan alat bantu press tool lebih presisi dibandingkan dengan pengerjaan manual. Analisa kontrol kualitas dari side rubber dilakukan dengan menggunakan statistik, dimana didapatkan bahwa nilai pengukuran panjang dan tinggi yang dihasilkan dari pengujia masih berada diantara nilai Batas Kontrol Atas dan Batas Kontrol Bawah sehingga hasil pengerjaan masih bisa dianggap baik dan mesin dapat digunakan untuk proses produksi selanjutnya.
PENGARUH TEMPERATUR DAN KETEBALAN BENDA COR TERHADAP SIFAT MEKANIK PADA PROSES PENGECORAN ALUMUNIUM Taufikurrahman, Taufikurrahman; Sundari, Ella
AUSTENIT Vol. 7 No. 2 (2015): AUSTENIT: Oktober 2015
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (173.962 KB)

Abstract

Casting process in small industries were using plain technology and recycled non-ferrous materials (such as aluminum, brass and copper). Casting was done by using sand mold casting and the casting systems were used kerosene furnace. The main constraint of such technology is that it is impossible to do diversification of products which have high sales value like souvenir products. These products are generally in form of sheets in various types of souvenirs which hardly be produced with existing casting technology. Material development will be determined the structure and properties of the optimum materials. The composition of aluminum alloy are 84.4% Al, 0.357% Ni, 2.74% Fe, 2.42% Cu, 0.179% Mn, 1.99% Zn, Sn 0.066%, 0.0704% Pb,  0061% Ti, and 0.066 Bi, where the influence of rising temperature causes the percentage of Mn, Zn, Mn, Mg Pb, Sn and Ti to decreased as a result of the evaporation process. Surface hardness decreased due to the increase in temperature, while the surface thickness has no effect.  The highest surface hardness found in 3 mm of cast thickness with temperature 650oC and 86.58 HBN. The endurance to impact loads is 3,36 Nm in 10 mm of thickness and temperature 750oC.
Co-Authors ., Taufikurahman Adian Aristia Anas Ahmad Junaidi Apriatun, Apriatun Arif Budiman Asrafi, Ibnu Darma Prabudi Dede Kurniawan farhan, farhan ikbar Fatahul Arifin, Fatahul Febriansyah, Muhammad Firdaus Firdaus Hafiz, Kemas Muhammad Hafiz, Muhammad Al Helmi, Muhammad Ilyasa Ismail, Nur Faiqa Junaidi , Ahmad Karmin Karmin, Karmin kms, m amin khaitami Krisna, Pratama Pela Kurniawan Saputra Lily Rahmawati, Lily Mardiana Mardiana Martomi, Eka Satria Meidian Pratama, Risco Mursal, Ahmad Nopriansyah, Agi Okviyanto, Toni Ozkar F. Homzah, Ozkar F. Pangestu, Wahyu Adjie Pratama, Rahmad Dandi Putri, Eresyah Putri, Fenoria Rasid, Muhammad REZA FAHLEVI Sampurno, Rachmat Dwi Sari, Femi Permata Soegeng Witjahjo Surya, Rayana Djaka Syamsul Rizal Syaputra, Muhammad Bobi Taufikurahman, Taufikurahman Taufikurrahman Taufikurrahman Taufikurrahman, Taufikurahman Utami, Ogi Meita Widagdo, Tri Wilza, Romi Yuliandi, Rizky Brillian Yusof, Khairul Huda Zulensi, Fisabilillah Caudilo Zulkipli, Muhammad Asyraf Zurianti, Zurianti