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Pressure Vessel Mechanical Design Case study for 10 kg/cm² Pressure and 179 C Temperature Sumanto Sumanto; Yuni Pita Asmiran; Pedro Da Silva; Hendra Gunawan; Acim Maulana
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 3 No 3 (2021): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Pressure vessel is a closed tube that holds pressure, both internal pressure and external pressure. This pressure vessel is designed to function as a reservoir for condensate or condensed water and convert it into steam or hot steam. This article discusses the design of a pressure vessel for a pressure of about 10 kg/cm² and a design temperature of 179oC. In the design of this pressure vessel, it includes determining the material to be used in the design, determining the allowable stress of each material used, determining the cylinder wall thickness, cylinder head or cover wall thickness, nozzle wall thickness, determining the maximum allowable working pressure limit. or maximum allowable working pressure and testing after the pressure vessel is finished, namely the hydrostatic test method. The design has been successfully carried out according to the provisions. Bejana tekan atau pressure vessel adalah suatu tabung tertutup penampung tekanan, baik tekanan dari dalam maupun tekanan dari luar bejana. Bejana tekan yang ini dirancang berfungsi sebagai penampung condensate atau air kondensasi dan mengubahnya menjadi steam atau uap panas. Pada artikel ini dibahas perancangan pressure vessel untuk tekanan sekitar 10 kg/cm² dan suhu rancang 179oC. Dalam perancangan bejana tekan ini meliputi pemilihan material yang akan digunakan dalam perancangan, menentukan tegangan yang diijinkan atau allowable stress dari setiap material yang digunakan, menentuan tebal dinding silinder, tebal dinding head atau penutup silinder, tebal dinding nozzle, menentuan batas tekanan kerja maksimum yang diijinkan atau maximum allowable working pressure dan pengujian setelah bejana tekan jadi yaitu dengan metode hydrostatic test. Dalam artikel ini perancangan secara numeris telah berhasil dilakukan dengan baik sesuai ketentuan.

VARIASI CAMPURAN ETHANOL PADA BAHAN BAKAR RON 95 DAN RON 90 DI MESIN MOTOR 4 LANGKAH Zufri Hasrudy Siregar; Indriyani Indriyani; Pedro Da Silva; Acim Maulana; Dedi Sarwedi; Andri Ramadhan
Instrumentasi Vol 46, No 1 (2022)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v46i1.296

Pemakaian sejumlah kendaraan bermotor akan sebanding dengan konsumsi bahan bakar fosil. Selain itu, pertumbuhan kendaraan yang meningkat setiap tahunnya tidak mempengaruhi konsumsi bahan bakar tetapi pada pertumbuhan penduduk. Kualitas Bahan bakar diukur dengan RON di mana makin tinggi nilai oktan maka makin baik kualitas bahan bakar tersebut. RON secara sederhana digambarkan seberapa besar tekanan yang bisa diberikan sebelum bensin terbakarsecara spontan di ruang bakar kendaraan. Tujuan penelitian ini adalah untuk mengetahui pengaruh daya, torsi, dan konsumsi bahan bakar dengan campuran RON 90, RON 95 dan ethanol dengan benda uji yaitu motor 4 langkah. Metode penelitian yang digunakan yaitu pendekatan metode kuantitatif dengan jenis penelitian pengembangan. Hasil dari penelitian ini yaitu bahan bakar RON 95 jika dicampur dengan ethanol akan menghasilkan performa mesin yang lebih baik, makin besarpersentase methanol yang dimasukkan kedalam bahan bakar maka makin baik performa yang dihasilkan, baik torsi, daya, maupun konsumsi bahan bakar yaitu pada rpm 1000, 1500, 2000, dan 2500; methanol 8% paling optimal dimana waktu nya 174 Sec, 105 Sec, 86 Sec, dan 51 Sec. Dan gaya pada Load Cell 0,535 kgf, 0,875 kgf, 1,102 kgf, dan 1,421 kgf.

Enhancement Material Removal Rate Optimization of Sinker EDM Process Parameters Using a Rectangular Graphite Electrode Sumanto Sumanto; Acim Maulana; Dodi Mulyadi; Khoirudin Khoirudin; Siswanto Siswanto; Sukarman Sukarman; Ade Suhara; Safril Safril
Jurnal Optimasi Sistem Industri Vol. 21 No. 2 (2022): Published in November 2022
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v21.n2.p87-96.2022

This article discusses the optimization of sinker electrical discharge machining (sinker EDM) processes using SPHC material that has been hardened. The sinker EDM method is widely employed, for example, in the production of moulds, dies, and automotive and aeronautical components. There is neither contact nor a cutting force between the electrode and the work material in sinker EDM. The disadvantage of the sinker EDM is its low material removal rate. This work aims to optimize the material removal rate (MRR) using graphene electrodes in a rectangular configuration. The SPHC material was selected to determine the optimum MRR model of the sinker EDM input parameter. The Taguchi experimental design was chosen. The Taguchi technique used three input parameters and three experimental levels. Pulse current (I), spark on time (Ton), and gap voltage were among the input parameters (Vg). The graphite rectangle was chosen as an electrode material. The input parameter effect was evaluated by S/N ratio analysis. The result showed that pulse current has the most significant impact on material removal rate in the initial study, followed by spark on time and gap voltage. All input parameters are directly proportional to the MRR. For optimal material removal rate, the third level of pulse current, spark on time, and gap voltage must be maintained. In addition, the proposed Taguchi optimization model could be applied to an existing workshop floor as a simple and practical electronic tool for predicting wear and future research.

Variasi pelumas pada torak displacer terhadap kinerja mesin Stirling Siregar, Zufri Hasrudy; Siregar, Masdania Zurairah; Maulana, Acim; Refiza, Refiza; Simanullang, Irwan Prasetya
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 9, No 1 (2023): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v9i1.7471

Dalam kehidupan kesehariharian manusia tak terlepas dari penggunaan energi, Indonesia banyak menggunakan energi minyak fosil sebagai energi utama, untuk itu diperlukan konservasi energi yang baik. Pilihan menggunakan mesin Stirling merupakan alternatif yang lain sebagai pilihan yang memungkinkan. Mesin sendiri tak terlepas dari andil pelumas untuk kinerjanya. Tujuan dari penelitian ini yaitu untuk mengetahui pengaruh variasi pelumas pada torak displacer terhadap kinerja mesin Stirling. Dilakukan pengujian dan analisis yang disimpulkan putaran mesin yang lebih tinggi dengan putaran maksimum 270 r.p.m. dengan rata-rata 258,5 r.p.m. Kemudian putaran yang terendah itu pada pengujian SAE 90 dimana putaran maksimum 250 r.p.m. dengan rata-rata 235,17 r.p.m., torsi maksimum 0,670 Nm dengan rata-rata daya yang diperoleh 17,154 watt, daya maksimum mesin Stirling 18.921 watt dengan pengujian menggunakan jenis pelumasan SAE 10 dan rata-rata daya yang dihasilkan 17,514 watt.

Enhancement Material Removal Rate Optimization of Sinker EDM Process Parameters Using a Rectangular Graphite Electrode Sukarman; Sumanto; Acim Maulana; Dodi Mulyadi; Khoirudin; Siswanto; Ade Suhara; Safril
Jurnal Optimasi Sistem Industri Vol. 21 No. 2 (2022): Published in October 2022
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v21.n2.p87-96.2022

This article discusses the optimization of sinker electrical discharge machining (sinker EDM) processes using SPHC material that has been hardened. The sinker EDM method is widely employed, for example, in the production of moulds, dies, and automotive and aeronautical components. There is neither contact nor a cutting force between the electrode and the work material in sinker EDM. The disadvantage of the sinker EDM is its low material removal rate. This work aims to optimize the material removal rate (MRR) using graphene electrodes in a rectangular configuration. The SPHC material was selected to determine the optimum MRR model of the sinker EDM input parameter. The Taguchi experimental design was chosen. The Taguchi technique used three input parameters and three experimental levels. Pulse current (I), spark on time (Ton), and gap voltage were among the input parameters (Vg). The graphite rectangle was chosen as an electrode material. The input parameter effect was evaluated by S/N ratio analysis. The result showed that pulse current has the most significant impact on material removal rate in the initial study, followed by spark on time and gap voltage. All input parameters are directly proportional to the MRR. For optimal material removal rate, the third level of pulse current, spark on time, and gap voltage must be maintained. In addition, the proposed Taguchi optimization model could be applied to an existing workshop floor as a simple and practical electronic tool for predicting wear and future research.

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