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Toto Supriyono
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Gedung MRC, Departemen Teknik Mesin, Fakultas Teknik Universitas Indonesia Kampus UI Depok 16424
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Prosiding SNTTM
Published by BKS-TM Indonesia
ISSN : 30321972     EISSN : 26230313     DOI : -
Core Subject : Agriculture, Engineering,
Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering
Prosiding SNTTM merupakan wadah bagi para peneliti dan praktisi tknik mesin untuk berbagi hasil riset, inovasi, serta perkembangan terbaru dalam bidang teknik mesin dan rekayasa. Prosiding menerima berbagai lingkup makalah terbaik dalam berbagai topik bidang teknik mesin, termasuk namun tidak terbatas pada: - Desain dan Manufaktur - Energi dan Konversi Energi - Material Teknik dan Metalurgi - Mekatronika dan Otomasi - Dinamika, Getaran, dan Kontrol - Transportasi dan Teknologi Otomotif - Termofluida dan Rekayasa Panas - Aplikasi Kecerdasan Buatan dalam Teknik Mesin
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 84 Documents
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Kaji eksperimental pengaruh variasi impeller terhadap kinerja pump as turbine Asral
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/ag1jc221

Abstract

The increasing demand for electrical energy has driven the utilization of renewable energy sources, one of which is water energy. Centrifugal pumps operated in reverse as Pump as Turbine (PAT) are a simple and economical solution for small-scale power plants. This study analyzes the effect of impeller shape variations open, half closed, and fully closed on PAT performance through experimental testing with valve opening variations (50–100%) and electrical loads (30-300 watts). The parameters observed include flow rate, rotational speed, and hydraulic efficiency. The results show that the open impeller produces the largest flow rate (63.369 m³/h), the semi closed impeller has the highest rotational speed (1958 rpm), while the fully closed impeller provides the highest efficiency (58%). The impeller shape has been proven to have a significant effect on PAT performance, particularly in increasing energy conversion efficiency. This research contributes to the selection of optimal impeller designs for small-scale hydroelectric power generation systems and the development of more efficient renewable energy technologies
Studi numerik bantalan implan sendi pinggul dengan material Ti6Al4V terhadap UHMWPE berdasarkan indeks massa tubuh orang Indonesia Sugih, S. Sugiharto; Khoerullah, Restu Fauzan; Supriyono, Toto; Permana, Muki Satya
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/g4bbnt41

Abstract

Kerusakan pada sendi pinggul merupakan permasalahan yang sering terjadi terutama pada pasien dengan obesitas dan usia lanjut. Hal ini dapat menyebabkan turunnya fungsi mobilitas serta kualitas hidup pasien. Implan ini merupakan solusi pengganti sendi pinggul alami yang rusak akibat osteoarthritis, Fungsi asli sendi pinggul tetap dipertahankan sesuai dengan fungsi aslinya agar pasien dapat beraktivitas kembali seperti biasa. Implan dibuat dari kombinasi material polimer dan logam. Penelitian ini bertujuan untuk mengevaluasi performa mekanik implan melalui studi simulasi numerik metode elemen hingga berdasarkan beban gaya yang terjadi pada saat siklus orang berjalan yang didasarkan pada indeks massa tubuh orang Indonesia dengan menggunakan perangkat lunak SolidWorks. Material yang digunakan dalam simulasi ini adalah kombinasi antara Ti6Al4V sebagai material komponen femoral head dan UHMWPE sebagai material komponen acetabular cup. Beban merupakan parameter utama untuk dianalisis pada kontak antara 2 komponen implan dengan menggunakan perangkat lunak SolidWorks. Hasil menunjukkan bahwa kombinasi Ti6Al4V dengan UHMWPE menghasilkan nilai tekanan kontak sebesar 10.81 MPa, tegangan Von Mises 10.20 MPa, dan perpindahan sebesar 0.05 mm. Hal ini terjadi pada fase ke tujuh yatu fase puncak gaya yang terjadi pada saat orang sedang berjalan. Tegangan Von Mises yang terjadi masih dibawah tegangan yield material Ti6Al4V dan UHMWPE.
Techno-economic analysis of waste heat recovery on the organic Rankine cycle: A case study at Gunungsitoli gas engine power plant Imansyah Ibnu Hakim
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/t6ewq657

Abstract

The organic Rankine cycle (ORC) is a technology that can utilize waste heat potential from various sources, including isolated power plants such as gas turbine power plants (PLTMG).  The Gunungsitoli Nias PLTMG has a significant opportunity to utilize its waste heat, which is at a temperature of 270°C, through the implementation of an ORC system.  A techno-economic analysis is necessary to assess the viability of implementing this concept. In this study, the optimal pressure, mass flow, and temperature parameters for achieving the highest net power were investigated.  The ORC simulations were conducted using the Aspen HYSYS software to evaluate its performance.   There are three variations of test cases: Single ORC (SORC) with R134a, SORC with R245fa, and Dual ORC (DORC) with a dual cycle of R245fa/R134a.  An economic analysis was conducted using three methods to assess the feasibility of implementing ORC technology at the PLTMG. The analysis included the Payback Period (PBP), Internal Rate of Return (IRR), Net Present Value (NPV), and Levelized Cost of Energy (LCOE) metrics. The results of the study indicate that the DORC R245fa/R134a system produces the highest net power output with operating parameters of pressure 14/12 Bar, mass flow 0.6/1.1 kg/s, and temperature 154/49 °C, yielding an ORC-R245fa/R134a result of 5,727 Watts/1.703% for the heat source from one unit PLTMGs and 28,595 Watts/1.70% for the heat source from 5 units PLTMG, which is higher than the SORC configuration for each fluid R245fa and R134a. The configuration becomes economically viable when the isentropic efficiency of the expander and pump is changed to 75% and 80%, respectively, and the mechanical efficiency is changed to 95%. The SORC-R245fa configuration yields the most economically advantageous configuration with an IRR of 10.09%, 355.45 million (NPV), 12 years (PP), and 966.54 Rp/kWh (LCOE) for the flue gas source from one units PLTMG, as well as 15.36% (IRR), 2,839.96 million (NPV), 8 years (PP), and 702.52 Rp/kWh (LCOE) for flue gas sources from five units PLTMG.  
Impact of the characteristics of the flow regimes and dynamics of coarse particles fly ash in circular transportation based on CFD-DEM Yanuar; Raja Fatah Satrio Abimanyu; Gunawan; Sri Poernomo Sari; Chakra Merdeka
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/yd51zd47

Abstract

Fly ash  are the primary residues generated from coal combustion, and they represent a serious environmental concern due to their volume and handling complexity. One potential mitigation strategy involves transporting these materials in the form of slurry through pipelines; however, achieving efficient flow remains a significant challenge due to the high concentration of solid particles. This study investigates the energy demands of fly ash slurry flow within circular pipelines using a combined approach of experimental observation and Computational Fluid Dynamics (CFD) simulation. Slurry concentrations of 30%, 40%, and 50% by weight were evaluated. Key flow parameters analyzed include shear stress, shear rate, Reynolds number, and friction factor. The Turbulent Kinetic Energy (TKE) [Figure (c)] shows a clear escalation in kinetic energy with increasing concentration. FA 50% attains the highest kinetic energy (0.0863673), almost twice that of FA 40% (0.0561258) and quadruple that of FA 30% (0.0185431). The CFD simulation results were validated against experimental data, showing a margin of error 6.212%, 4.163%, 5.032[1]% for 30%, 40%, 50% fly ash, and 5.51460%, 8.79267%, 2.72044% for 30%, 40%, 50% bottom ash, respectively, supported by a good Grid Convergence Index of 0.017432% which indicates strong agreement. These findings offer a technical basis for developing energy efficient slurry transport systems and provide further insight into the non-Newtonian behavior characteristic of high solids flow regimes.

Page 9 of 9 | Total Record : 84

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