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All Journal JTT (Jurnal Teknologi Terapan) JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) METAL : Jurnal Sistem Mekanik dan Termal Industrial Research Workshop and National Seminar
Meri Rahmi
Politeknik Negeri Indramayu
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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ANALISIS KEKUATAN BALL VALVE AKIBAT TEKANAN FLUIDA MENGGUNAKAN FINITE ELEMENT ANALYSIS Meri Rahmi; Delffika Canra; Suliono Suliono
Jurnal Teknologi Terapan Vol 4, No 2 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (531.669 KB) | DOI: 10.31884/jtt.v4i2.122

Abstract

Valve (katup) sebagai salah satu produk industri, sangat dibutuhkan oleh perusahaan yang bergerak mengontrol aliran cairan untuk efisiensi. Kebutuhan tentang ini banyak digunakan oleh perusahaan makanan, obat-obatan, minuman, pembangkit listrik dan industri minyak dan gas. Tujuan penggunaan valve adalah untuk membatasi dan mengontrol cairan pada kondisi tekanan tinggi. Salah satu katup yang sering digunakan adalah ball valve, yaitu katup dengan tipe gerak memutar. Adanya permintaan ball valve ini, dibutuhkan produk dengan spesifikasi tertentu memiliki rancangan dengan tingkat kekuatan yang baik. Dengan kata lain, produk valve (katup) yang baik, harus memiliki kekuatan yang baik, aman dan sesuai dengan kebutuhan dilakukan pengujian. Penelitian ini bertujuan untuk melakukan analisis terhadap ball valve 4 inch ANSI 300 untuk memastikan katup yang diproduksi sesuai spesifikasi, kuat dan tahan terhadap tekanan fluida. Metode yang digunakan adalah Finite Element Analysis (FEA) dengan software Solidworks. Analisis dilakukan pada ball valve 4 inch ANSI 300 dengan keadaan full open, hall open dan full closed serta dengan pembebanan 725 psi dan 1087.5 psi hasil dari Computational Fluid Dynamics (CFD). Analisis dilakukan pada temperatur -29.50C, 250C dan 4250C. Berdasarkan hasil analisis dengan FEA, dinyatakan bahwa ball valve 4 inch ANSI 300 kuat dan aman untuk digunakan. Nilai faktor keamanan (safety factor), signifikan lebih tinggi dari nilai safety factor minimum yang diizinkan.
Analisis Perbedaan Tekanan Fluida pada Ball Valve Kondisi Full Closed dan Full Open dengan Computational Fluid Dynamics Meri Rahmi; Delffika Canra; Suliono Suliono
Jurnal Teknologi Terapan Vol 4, No 1 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (625.011 KB) | DOI: 10.31884/jtt.v4i1.83

Abstract

Ball valve is one type of rotary motion valve. Ball valve functions as a round disc-shaped ball-like controller. Ball valve is widely used because it is easy to repair and the ability in high pressure and high temperature. The fluid flow in the ball valve does not always flow, sometimes the flow is closed. This will affect the fluid pressure in the valve. Fluid pressure is also affected due to valve open condition. This study aims to analyze the difference of the fluid pressure in ball valve -4 inch ANSI during closed condition and open condition. The method used is Computational Fluid Dynamics with f Flow Simulation Solidworks software. The analysis was performed for two valve conditions with a temperature of 425 °C. Decrease in pressure does not significantly affect the condition of the ball valve, even when the temperature of the fluid is high. The difference of fluid pressure between full closed condition and full open is only 0.01 psi.
ANALISA ALIRAN ANGIN PADA SUDU TURBIN ANGIN SAVONIUS TIPE-U BERBASIS SOFTWARE Delffika Canra; Meri Rahmi; Emin Haris
Jurnal Teknologi Terapan Vol 4, No 2 (2018): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1216.203 KB) | DOI: 10.31884/jtt.v4i2.123

Abstract

Generally, wind energy sources in Indonesia's coastal areas is one of the potential sources of renewable energy (renewable energy resources) which are abundant, environmentally friendly and renewable. Savonius wind turbines can produce relatively high torque even at low wind speeds. Because it is very well developed to produce electrical energy. To get a large electric power, a large turbine construction is also needed which also certainly requires a large cost. For this reason, it is necessary to develop the dimensions of this wind turbine construction which is known as aspect ratio (Ar). The Ar that has been researched is the blade section, and other values. While the arch depth or the length of the blade arc in U -type is still likely to be researched. Therefore, it is necessary to do research on the U-type blade arc to get greater power than before. In addition to the experimental method with a prototype of the U type Savonius wind turbine with a number of 2 blades, a software-based simulation method will be carried out to analyze the air flow on the wind turbine blade. Parameters varied only with the aspect ratio of the arc length and blade cross section width, other parameters follow the previous research. This analysis will be a comparative data with experimental methods. The expected simulation results obtain the best aspect ratio (Ar) blade in capturing wind energy.
Analisis Efisiensi Box Fermentasi Oncom Tahu dengan Sistem Arduino Meri Rahmi; Agus Sifa; Rachmatullah -
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 1 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (924.302 KB) | DOI: 10.25077/metal.6.1.31-37.2022

Abstract

Tofu dregs are a by-product in the process of making tofu in solid form and are obtained from squeezed soybean pulp. Tofu pulp still has a relatively high protein content because in the process of making tofu not all protein content is extracted, especially when using a simple and traditional milling process. One of the products from tofu dregs is tofu oncom. Oncom is a fermented food product typical of West Java. Oncom is a processed food derived from soybeans, its nutritional value is almost the same as tofu and tempe. It contains protein and fat that are good for the body. The process of making tofu oncom is almost the same as making tempe oncom, However, its utilization is still small in the industry compared to its abundant production. So, a lot of it is still wasted. In addition, the process of making tofu oncom is still very simple and uses traditional methods by relying on natural conditions and this takes longer. For this reason, with better methods and technology, a fermentation box is made for the manufacture of tofu oncom. The method used is a heater and temperature and humidity sensors to speed up the fermentation process. In addition, the use of aluminum material, in order to ensure that oncom tofu is more hygienic so that it can become one of the traditional products that can compete in a better market. The results of this fermentation box indicate that the processing time for making tofu oncom is faster from 2 days (± 24 hours) to 1 day (± 14 hours). Reduction of processing time by about 58% so that productivity also increases to above 50% with a box capacity of up to 50 kg of tofu dregs.
Pengujian Turbin Air Pusaran Gravitasi dengan Variasi Overlap Ratio Rotor Muhammad Luthfi; Meri Rahmi; Rachmatullah -
METAL: Jurnal Sistem Mekanik dan Termal Vol 6, No 1 (2022): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1045.707 KB) | DOI: 10.25077/metal.6.1.14-23.2022

Abstract

The gravitational water vortex turbine is a turbine system that can convert the energy from artificial water vortex by means of the drained water through the basin outlet to the kinetic energy of rotor rotation. This type of turbine system is able to produce energy despite the low head of water flow. Many researches were conducted to improve the efficiency of this turbine by changing the shape of basin, or the rotor. Meanwhile, the Savonius rotor has good starting rotation and ease of fabrication, but low efficiency. One way to increase the efficiency of this rotor is to apply the gap between the blades which is called Overlap Ratio (OR). In this research, the gravitational water vortex turbine with the conical-shape basin was combined with the various-OR Savonius rotors with area proportion of 26,88% and without endplate and the effect was observed to the efficiency of turbine. The volume flowrate of channel was maintained constant at 0,005 m3/s while mass was added gradually for the torque measurement system by using rope brake dynamometer. The result showed that for all rotors, the greater efficiency occurred in the low rotational speed. Moreover, the rotor with OR of 0,15 had greater mechanical efficiency which was around 22,78% for the rotor with endplate 26,88% and 27,18% for the rotor without endplate than rotor with OR of 0. Meanwhile, rotor without endplate had higher maximum mechanical efficiency for all OR variation than that with endplate 26,88%.
Analisis Kekuatan Flange Valve Akibat Pengaruh Bolt Torque pada Kondisi Pressure dan Temperature Berbeda dengan Metode Finite Element Analysis Meri Rahmi; Suliono; Delffika Canra; Rachmatullah; Yusuf Nur Rohmat; Dedi Suwandi
Jurnal Teknologi dan Rekayasa Manufaktur Vol 2 No 1 (2020): Vol 2 No 1 (2020): Volume: 2 | Nomor: 1 | April 2020
Publisher : Pusat Pengembangan, Penelitian dan Pengabdian kepada Masyarat (P4M) Politeknik Manufaktur Bandung (Polman Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.48182/jtrm.v2i1.22

Abstract

Pipe connecting system that is connected with a valve using a flange connection. This aims to make it easier to install or disconnect when needed. This connection system includes pipe connections to fittings, valves, equipment, or other parts which are separate parts of the piping system. The analysis of the flange strength on the 4 inch ball valve ANSI 300 aims to determine and ensure that the flange has strength and is safe at the time of tide due to the influence of the torque bolt. In addition, to ensure the connection does not leak when the fluid is passed. The main combination between internal, axial pressure and thermal loading needs to be considered. Flange strength analysis using Finite Element Analysis (FEA) method with use of Solid works software. The analysis of flange strength uses the method of "Flange as weakest part philosophy", namely the full rating used when the value of a certain pressure-temperature on ASME B16.5 is taken for the Maximum Allowable Working Pressure (MAWP) in the piping system. From the results of the FEA analysis, it was found that the flange on the 4 inch ANSI 300 ball valve meets the requirements according to MAWP at different temperatures and pressures. The value of the safety factor also shows that the flange is safe during the piping work process.
Analisis Kekuatan dan Safety Factor Alat Pengering Ikan Berbasis Teknologi Tenaga Surya dan Biomassa dengan Metode Finite Element Analysis Meri Rahmi; Suliono Suliono; Badruzzaman Badruzzaman
Prosiding Industrial Research Workshop and National Seminar Vol 11 No 1 (2020): Prosiding 11th Industrial Research Workshop and National Seminar (IRWNS)
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (932.285 KB) | DOI: 10.35313/irwns.v11i1.2000

Abstract

Salah satu metode untuk pengawetan ikan adalah dengan proses pengeringan. Proses pengeringan ikan yang dilakukan oleh nelayan khususnya di Desa Eretan Wetan, Kecamatan Kandanghaur, Kabupaten Indramayu masih secara tradisional. Dari segi waktu dan kualitas, metode ini tidak efisien dan efektif, karena panas matahari tidak stabil. Sehingga kadar air untuk produk ikan kering yang dihasilkan masih jauh dari standar pangan yang telah ditentukan. Untuk itu, penelitian ini bertujuan untuk menganalisis alat pengering ikan dengan teknologi matahari dan biomassa. Pengeringan ikan dengan sumber tenaga surya dan ditambahkan dengan panas yang berasal dari pembakaran briket yang ditempatkan secara proposional. Rak pengeringan ikan di dalam ruang kaca, bergerakmemutar searah sumbu Y dengan kecepatan maksimum 20-25 rpm, agar pemanasan stabil ke segala arah. Penelitian ini, menganalisis kekuatan dan safety factor dua rangka utama alat pengering ikan, yaitu rangka bawah dan rangka atas karena menampung beban keseluruhan ± 30 kg. Metode analisis ini menggunakan Finite Element Analysis (FEA) dengan bantuan software Solidworks. Berdasarkan hasil analisis kekuatan dengan FEA, disimpulkan bahwa pengering dengan kapasitas daya tampung ikan ± 5 kg kuat dan relatif aman. Tegangan maksimum untuk rangka bawah dan rangka atas adalah 2,03e+007 N/mm2 dan 3,14e+006 N/mm2. Perubahan bentuk (displacement) dan regangan (strain) tidak signifikan dengan rata-rata 0,18 mm. Sedangkan nilai safety factor menunjukkan nilai 7,34 dan 1,5 dan masuk kategori aman.
Analisis Proses Pengujian Kinerja Mesin Fish Grading untuk Sortir Ikan Lele Kapasitas 5 Kg Badruzzaman Badruzzaman; Tito Endramawan; Meri Rahmi; Faishal Fahad
Prosiding Industrial Research Workshop and National Seminar Vol 11 No 1 (2020): Prosiding 11th Industrial Research Workshop and National Seminar (IRWNS)
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (699.03 KB) | DOI: 10.35313/irwns.v11i1.2003

Abstract

Ikan lele (Clarias gariepinus) merupakan salah satu akan air tawar dan komoditas perikanan yang cukup mudah dibudidayakan, memiliki keistimewaan dan banyak diminati masyarakat untuk dikonsumsi. Ikan lele saat ini sudah banyak dikembangbiakkan oleh petani tambak lele melalui beberapa metode pembiakan, diantaranya melalui empang /tambak, terpal yang dimodifikasi, dan lain sebagainya. Pada saat proses panen, perlu dilakukan penyortiran ikan untuk menentukan keseragaman berat dan ukuran ikan. Ikan dengan berat dan ukuran tertentu memiliki harga ekonomi yang tinggi. Hal tersebut diberikan solusi dengan membuat mesin fish gading dengan kapasitas 5 kg dalam satu kali proses penyortiran. Untuk memastikan kehandalan mesin dan menjamin kualitasatau mutu proses penyortiran ikan lele, perlu dilakukan pengujian kinerja. Metode pengujian yang dilakukan ada dua macam yaitu pengujian mesin dengan uji getaran, uji kebisingan, uji putaran kecepatan rpm, dan yang kedua pengujian hasil berupa 3 kali hasil analisis. Pengujian satu kali proses membutuhkan waktu 10 detik dengan daya tampung hopper in sebanyak 5 kg. Ikan lele yang diuji adalah lele sangkal, lele konsumsi, dan lele bongsor/jumbo. Hasil pengujian menunjukkan mesin telah menyortir ketiga jenis ikan lele yang ada sesuai dengan spesifikasi yang telah ditentukan sehingga mesin dapat digunakan oleh petani tambak lele.
Analisis Kekuatan Pembebanan Rangka Pada Perancangan Mesin Grading fish Jenis Ikan Lele Menggunakan Simulasi Solidworks Badruzzaman Badruzzaman; Tito Endramawan; Meri Rahmi; Johan Susandi
Prosiding Industrial Research Workshop and National Seminar Vol 11 No 1 (2020): Prosiding 11th Industrial Research Workshop and National Seminar (IRWNS)
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (653.105 KB) | DOI: 10.35313/irwns.v11i1.2004

Abstract

Ikan lele adalah salah satu ikan tawar yang banyak dibudidayakan dan dikonsumsi di Indonesia. Ikan ini banyak dikonsumsi karena mudah diolah, banyak disukai, dan memiliki kandungan protein yang tinggi. Dari semua jenis ikan lele hampir semua memiliki sifat kanibal. Pada proses panen, masih dilakukan penyortiran secara manual menggunakan tangan dan baskom yang dihitung secara manual pula. Hal ini akan menambah waktu proses panen sehingga biaya produksi akan semakin meningkat. Seiring dengan permasalahan tersebut, maka dirancang mesin grading fish yang diharapkan mampu mempercepat waktu proses penyortiran. Tahapan perancangannya adalah studi literatur, konsep perancangan, desain terpilih, analisis, dan membuat gambar 3D. Dari hasil analisisdesain, mesin ini menggunakan motor bensin, hopper, pipa stainless, rantai penyortiran dan sprocket, pulley dan gearbox, serta bearing. Sprocket yang digunakan 16T dan pulley berdiameter 8 inchi, rangka dengan profil L dengan ukuran 30x30x3 mm serta plat stainless dalam pembuatan hopper dan cover dengan ketebalan 0,8 mm. Hasil penyortiran ini mendapatkan 3 jenis ikan lele yang dikategorikan sesuai standar yang ada. Proses pembuatan desain gambar dan simulasi menggunakan aplikasi solidwok. Hasil analisis kekuatan rangka dengan simulasi solidworks tersebut, dapat disimpulkan bahwa mesin dapat menahan beban komponen yang ada dan ikan lele seberat 5 kg dalam 1 kali proses pengujian.
Co-Authors Agus Sifa Badruzzaman Badruzzaman Dedi Suwandi Delffika Canra Faishal Fahad Haris, Emin Johan Susandi Muhammad Luthfi Rachmatullah Rachmatullah - Suliono Suliono Suliono Suliono Suliono Yusuf Nur Rohmat