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Mudjijanto Mudjijanto
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Karakteristik Geram dan Kekasaran Permukaan pada Proses Bubut Kecepatan Rendah terhadap Baja Karbon Mudjijanto Mudjijanto; Eko Sutarto; Sarip Sarip
SIMETRIS Vol 13 No 1 (2019): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pesatnya perkembangan teknologi di bidang manufaktur memudahkan industri untuk menghasilkan produk massal, berkualitas tinggi dan harga terjangkau. Tantangan bagi industri kecil menengah di bidang manufaktur adalah bersaing terhadap kualitas produk. Industri kecil manufaktur dalam mengendalikan kualitas produk terkendala dengan masalah keuangan. Tujuan dari penelitian ini adalah untuk mengetahui hubungan antara karakteristik geram dan kekasaran permukaan dengan kekerasan baja karbon. Penelitian ini menggunakan mesin bubut konvensional dengan putaran rendah, kedalaman pemakanan 1 mm, proses tanpa pendinginan dengan variasi laju pemakanan 0,1 mm/putaran, 0,2 mm/putaran dan 0,3 mm/putaran, bahan uji baja AISI (1010, 1045 dan 1068) dan material pahat dari karbida. Stereoscopic Optical Microscopy (SOM) digunakan untuk mengukur sudut geser sementara Surface Roughness Tester digunakan untuk mengukur kekasaran permukaan. Hasil penelitian menunjukkan bahwa dimensi geram dan kekasaran permukaan berkorelasi dengan kekerasan baja karbon.
Analisis Performance Centrifugal Pump dengan Mengunakan Computating Fluid Dinamyc (CFD) untuk Transfer Condensate di Area Onshore Processing Facilities Balongan PHE ONWJ Mudjijanto Mudjijanto
SIMETRIS Vol 15 No 1 (2021): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v15i1.319

Abstract

Condensate transfer is one part of upstream oil and gas production operations. Condensate is a liquid hydrocarbon obtained from gas wells. Transfer is carried out using a transfer pump. In the activity of using the pump, we need to analyze the pump parameters. The aim is to evaluate the energy performance of the pump according to the variation of the velocity of the fluid being flowed and to determine the pump's working point. The research was conducted by testing the performance of the pump in the field and analyzing it using CFD in solidwork application. The method applied is to change the flow variation with a fluid velocity of 5.9m/s; 17.2m/s ; 20.5m/s. Tests are carried out to determine the pressure and temperature of the pump. The test data in the field will then be compared with the simulation data in the application. The results of the analysis carried out using a flow variation of 5.9 m/s and 17.2 m/s obtained a pressure and temperature comparison between the actual and the simulated according to the operating conditions of the pump. In the analysis with a speed variation of 20.5 m/s there is an indication of a decrease in pump pressure under actual conditions in the field, namely 39 Psi, while in the simulation with ideal conditions it exceeds the operating pressure of the pump. So the conclusion obtained is that the variation in flow causes differences in pump performance in terms of Pressure and Temperature. At a variable speed of 20.5 m/s there is a change in pump performance and if left unchecked can cause damage in the long term.
Simulasi Kavitasi Pada Venturi Dengan Menggunakan CFD (Computational Fluid Dynamics) Mudjijanto Mudjijanto
SIMETRIS Vol 16 No 1 (2022): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v16i1.320

Abstract

In the piping installation system, the phenomenon of cavitation is often overlooked, while cavitation itself is one of the disadvantages in the piping installation system. For this reason, we conducted a study on the cavitation phenomenon in venturi using Fluent 6.3 software. The fluid pressure entering the venturi comes from pumps that are arranged singly, in series and parallel. For the pressure generated from the pump arrangement as follows single pump 5 psi, 6 psi in series and 11 psi in parallel. The first is to collect data, model on gambit, carry out the meshing process, determine the boundary conditions and run the Fluent 6.3 3D solver. From the simulation, we can see the flow pattern from the characteristics of pressure, velocity, direction, pressure trajectory, and flow velocity trajectory. Cavitation occurs at the venturi neck and turbulent flow occurs at the outlet of the venturi
Co-Authors Eko Sutarto Sarip Sarip