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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 82 Documents
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Analisis hambatan kapal bulk carrier skala model dan skala penuh menggunakan simulasi CFD dan formula empiris Waskito, Kurniawan Teguh
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: 10.71452/5fkat551

Abstract

Penelitian ini mengkaji analisis hambatan kapal bulk carrier pada skala model dan skala penuh menggunakan simulasi CFD NUMECA Fine/Marine dan formula empiris metode Holtrop-Mennen. Penelitian bertujuan untuk membandingkan perbedaan hambatan antara hasil simulasi CFD dan perhitungan metode Holtrop-Mennen sebagai validasi, serta menganalisis nilai koreksi (ΔCF) untuk skala model dan skala penuh guna mendukung ekstrapolasi nilai hambatan pada ukuran kapal tertentu. Hasil dari kedua metode menunjukkan peningkatan gaya yang signifikan seiring bertambahnya skala kapal, dengan tingkat kesalahan antara 1,72% hingga 13,30%, menunjukkan tidak adanya perbedaan signifikan antara kedua metode. Nilai koreksi (ΔCF) yang lebih besar pada kapal berukuran kecil mengindikasikan bahwa simulasi skala model memerlukan penyesuaian lebih besar untuk akurasi pada skala penuh dibandingkan kapal berukuran besar. Penelitian ini menghasilkan persamaan ekstrapolasi untuk prediksi hambatan, yang meningkatkan efisiensi operasional dan estimasi konsumsi bahan bakar dalam desain kapal. Namun, keterbatasan meliputi kebutuhan validasi lebih lanjut dengan uji towing dan peningkatan jumlah meshing untuk kapal skala besar. Penelitian ini berkontribusi pada peningkatan akurasi prediksi hambatan kapal, mendukung desain kapal yang optimal dan efisiensi biaya operasional, khususnya untuk kapal bulk carrier.
Evaluasi keselamatan kebakaran kendaraan bermotor Nugroho, Yulianto Sulistyo; Nugroho, Reza Adyanto; Adhitya, Mohammad; Santoso, Muhammad Agung
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/qmde8743

Abstract

Risiko kebakaran kendaraan bermotor terus meningkat sejalan dengan meningkatnya populasi kendaraan bermotor serta mobilitas masyarakat. Kebakaran kendaraan bermotor dapat terjadi di perjalanan, di stasiun pengisian bahan bakar umum atau di dalam bangunan saat kendaraan di parkir. Kebakaran kendaraaan bermotor bukan saja menimbulkan kerusakan pada kendaraan, bangunan gedung parkir, tetapi juga dapat mengakibatkan cidera bahkan fatalitas penumpang kendaraan bermotor tersebut. Risiko kebakaran kendaraan bermotor baik berupa kendaraan dengan mesin pembakaran dalam (internal combustion engine - ICE) atau kendaraan listrik (electric vehicle – EV) ditandai dengan laju pelepasan kalor (heat release rate) akibat terbakarnya komponen / bahan mampu bakar yang ada di dalam kendaraan, maupun terbakarnya bahan bakar atau baterei sebagai sumber energi penggerak utama kendaraan bermotor. Untuk memberikan Gambaran mengenai risiko kebakaran kendaraan bermotor, makalah ini menyajikan metode pengukuran laju pelepasan kalor, kaji literatur hasil pengukuran eksperimental, dan evaluasi keselamatan kebakaran kendaraan bermotor sebagai upaya meningkatkan kepedulian dan keselamatan masyarakat pada umumnya.   
Design and fabrication of a lumbar interbody fusion spine cage combining titanium and PEEK materials Whulanza, Yudan
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: 10.71452/9j5vvz23

Abstract

Lower back pain (LBP) is a common condition that significantly affects patient quality of life. One of the pathological causes of LBP is degenerative disk disease (DDD), resulting from the degeneration of the intervertebral disc (IVD). A surgical option for addressing this is transforaminal lumbar interbody fusion (TLIF), which involves the use of an implant known as a spine cage to maintain spacing between vertebrae during bone fusion. Spine cages are commonly made from either polyether ether ketone (PEEK) or titanium, both of which have distinct advantages and limitations. PEEK exhibits a bone-like elastic modulus but limited osseoconductivity, whereas titanium offers good osseoconductivity but an elastic modulus much higher than bone. This study proposes a hybrid spine cage combining both materials: PEEK machined via computer numerical control (CNC) machining and titanium fabricated using selective laser melting (SLM). The cage features a banana shape, nose insertion, pins-and-holes connection system, and dimensions customized for the Indonesian lumbar morphometry. Realized prototype showed a maximum margin of 3.9% for titanium part and 2.14% for PEEK part. Further results showed a compressive elastic modulus of 1.36 GPa, indicating the current model followed mechanical property of titanium material.
Effect of travel speed ​​and arc length on geometry and heat accumulation in WAAM-GMAW process Sifa, Agus; Sunar Baskoro, Ario; Riyantono, Afrizal; Khoirina, Faza; Kiswanto, Gandjar; Junaidi, Syarif
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: 10.71452/88detg63

Abstract

Wire arc Additive Manufacturing (WAAM) is a technology capable of manufacturing large and complex components using aluminum alloys. This is due to its high deposition rate and efficient material utilization. However, WAAM faces several issues, particularly regarding process stability. In the WAAM process, especially when using Gas Metal Arc Welding (GMAW), stability is largely determined by controllable process parameters such as travel speed and arc length. This study aims to clarify how fusion stability, influenced by travel speed and arc length, affects the resulting deposit geometry and heat accumulation. The experimental method involved conducting a single-layer WAAM process using GMAW, with ER5356 filler (diameter 1 mm) and AA6061 substrate. During the single-layer WAAM GMAW process, the heat temperature and current were measured in real-time on the deposits. The results included minimum and maximum height and width measurements of the deposits produced. It was observed that increasing the travel speed reduced the current, thereby lowering the heat input. Heat accumulation, under fixed parameters of 80 A current, 16 V voltage, and varying travel speeds and arc lengths, fluctuated throughout the process. At an arc length of 6 mm, the single-layer deposit geometry exhibited humping, causing irregular widths and heights. Overall, both travel speed and arc length played significant roles in determining the maximum and minimum heights of the deposits.
Analisis multi-kriteria bahan bakar rendah sulfur untuk mesin diesel kapal tanker: Kinerja, emisi, dan biaya Budiyanto, Muhammad Arif; Hanin Safiya; Santoso, Muhammad Agung
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/c7mkyj59

Abstract

Masalah pencemaran lingkungan akibat aktivitas transportasi laut menjadi perhatian utama bagi International Maritime Organization (IMO) dan para pemangku kepentingan. Untuk mengurangi dampak negatif emisi dari kapal terhadap kualitas udara, IMO menetapkan regulasi global melalui MARPOL 73/78. Penelitian ini menggunakan pendekatan komparatif untuk mengevaluasi efektivitas empat jenis bahan bakar berdasarkan kinerja mesin, tingkat emisi, dan aspek biaya. Analisis dilakukan melalui simulasi menggunakan perangkat lunak Diesel-RK serta perhitungan manual pada mesin diesel laut empat langkah tipe C32 ACERT yang umum digunakan pada kapal tanker minyak. Keempat jenis bahan bakar yang diuji, yakni High Sulfur Fuel Oil (HSFO), Low Sulfur Fuel Oil (LSFO), Ultra-Low Sulfur Fuel Oil (ULSFO), dan Biosolar B30, memiliki kadar sulfur yang berbeda namun digunakan pada mesin yang sama. Secara umum, HSFO merupakan bahan bakar dengan harga paling ekonomis dibandingkan ketiga bahan bakar lainnya. Hasil penelitian menunjukkan bahwa Biosolar B30 memberikan performa mesin tertinggi dengan capaian sebesar 88,88%. Dari sisi emisi, ULSFO menunjukkan tingkat emisi NOx dan SO₂ paling rendah, masing-masing dengan persentase rata-rata 39,1% dan 0,02% dibandingkan emisi tertinggi. Sementara itu, untuk emisi CO₂, Biosolar B30 menghasilkan emisi paling rendah dengan rata-rata pengurangan sebesar 90%. Di sisi lain, dari aspek biaya operasional tanpa penggunaan scrubber, Biosolar B30 tercatat sebagai bahan bakar dengan harga tertinggi, yakni sebesar 77% dari total biaya operasional.
Analysis of co-firing palm oil waste for the economic and emission performance of PLTU in Riau Aulia Ramadhan; Anita Susilawati; Asral; Dodi Sofyan Arief; Dinni Agustina
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/rkcrwn20

Abstract

This study evaluates the co-firing of palm oil industry waste biomass, specifically Palm Kernel Shell (PKS) and Empty Fruit Bunch (EFB) pellets, in coal-fired power plants (PLTU) in Riau, Indonesia, to support a sustainable energy transition. Empirical tests were conducted at PLTU Tenayan and Tembilahan, using biomass substitution rates of 5% and 50%, respectively. Key performance indicators, including Specific Fuel Consumption (SFC), Net Plant Heat Rate (NPHR), production cost, and exhaust emissions (SO₂ and NOₓ), were analyzed. Results show that 5% PKS co-firing at PLTU Tenayan reduced SFC from 0.871 to 0.856 kg/kWh and NPHR from 4,187 to 4,116 kCal/kWh, while 50% PKS co-firing at PLTU Tembilahan decreased SFC from 1.171 to 0.785 kg/kWh and NPHR from 5,312 to 3,625 kCal/kWh. Economically, PKS co-firing resulted in cost savings of up to Rp223.58/kWh. Emission measurements revealed SO₂ reductions up to 27.8% at PLTU Tenayan and 34% at PLTU Tembilahan (EFB scenario), with NOₓ emissions remaining stable or decreasing by up to 13%. Conversely, EFB pellet co-firing increased fuel consumption and production costs due to higher fuel prices and operational challenges. The study confirms that PKS co-firing is a viable and effective approach to enhance power plant efficiency, reduce emissions, and lower costs in palm oil-producing regions. Limitations include short test durations and limited plant sites; therefore, long-term monitoring is recommended to assess boiler integrity, operational stability, and emission performance for sustainable large-scale implementation. This research provides critical technical, economic, and environmental insights for advancing biomass co-firing in commercial coal power plants.
Studi distribusi temperatur pada tradisi bakar batu papua sebagai sistem pemanasan tradisional multi lapisan Siregar, Samuel Parlidungan
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/jwcw7768

Abstract

The Bakar Batu (Barapen) tradition is a communal cooking method practiced by the indigenous people of Papua, Indonesia, which utilizes heat from pre-heated volcanic stones arranged in layered systems with food, leaves, and soil. This study aims to analyze the vertical temperature distribution within this traditional multi-layered heating system and evaluate its thermal effectiveness in achieving complete food cooking. An experimental field approach was employed, involving the installation of K-type thermocouples at five vertical points from the stone base to the surface, accompanied by thermal imaging using an infrared camera. Temperature data were recorded over 90 minutes and analyzed using a one-dimensional transient heat conduction model, as well as temperature gradient and heat flux calculations. The results show a gradual upward propagation of heat, with the base stones reaching up to 510 °C and the food layer attaining a maximum temperature of 98 °C at minute 40. The highest heat flux was observed between the hot stone and food layer (2955 W/m²), indicating the most active zone of heat transfer. The core food temperature remained above 90 °C for over 20 minutes, which is sufficient for complete biological cooking. This research confirms that the Bakar Batu system demonstrates high thermal efficiency and can serve as a reference model for sustainable thermal system design rooted in local wisdom.
Comparative analysis of oil, water, and solid separation performance using a three-phase decanter in palm oil mills: Case study at PKS A and B M. Sabri; Sabri, Geubrina Hikmah
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/s8nras98

Abstract

This study examines the performance of a three-phase decanter centrifuge in separating oil, water, and solids in palm oil mills. Efficient separation is critical to improving crude palm oil (CPO) yield and minimizing losses, yet many mills face challenges such as excessive sludge, unstable emulsions, and oil loss. The objective of this research is to compare the operational performance of decanters at A and B mills and to identify the dominant factors influencing oil loss. A case study approach was employed, combining sampling of light, heavy, and solid phases with operational data analysis and direct observations. The results indicate that PKS A experienced high non-oil solids (NOS) in the feed, which caused excessive oil loss in the sludge, while PKS B faced unstable and high emulsion levels, resulting in greater oil loss in the heavy phase. These findings confirm that decanter performance is highly site-specific, even when identical machines are used. The study concludes that operational strategies must be tailored: reducing NOS in PKS A and controlling emulsions in PKS B. The main contribution of this research is providing empirical evidence of differing decanter challenges across mills, offering practical guidance for optimization. The limitation lies in the scope restricted to two mills, suggesting that future research should include more sites and external variables to develop a comprehensive optimization model.
Optimizing the performance of gasoline-ethanol-methanol fueled engines with variations in the air-fuel ratio Mokhtar; Agus Sumarsomo, Danardono; Adika Agama, Askar; Adhitya, Mohammad
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: 10.71452/638pey73

Abstract

The 125 cc, four-stroke, air-cooled, electronic fuel injection SI engine for motorcycles was used to compare the effects of mixing methanol and ethanol with gasoline on engine power, fuel efficiency, and engine emissions. The test took place on the engine test bench. the fuel blending variation is 80% gasoline with various methanol-ethanol percentages. The result shows that The maximum torque value of all fuel mixture variants is achieved in the M20 mixture at λ= 0.9 at 6000 RPM, namely 8.52 Nm. The power value shows the highest value in the M20 mixture with λ= 1.1, namely 6.45 kW and the lowest value of SFC is 266.3 g/KWh obtained by the E10M10 mixture at 6000 RPM engine speed at λ=1.3
Pengaruh katalis bentonit terhadap produksi minyak pada pirolisis sampah plastik low density polyethylene Mainil, Rahmat Iman; aziz, azridjal; Banjarnahor, Syahdi Fahala
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/hn999r48

Abstract

Pyrolysis is the heating of plastic waste at high temperatures with or without oxygen, producing oil, gas, and carbon residue. The use of catalysts in the pyrolysis process can accelerate the conversion of plastics, resulting in better-quality oil. This study aims to examine the potential of oil produced from the pyrolysis of Low-Density Polyethylene (LDPE) plastic with the addition of bentonite clay catalyst as an alternative fuel. The pyrolysis process was carried out experimentally at a temperature of 450 °C with a residence time of 60 minutes, and variations of catalyst composition of 0%, 5%, 10%, 15%, and 20% were tested to obtain the optimum condition. The composition that produced the highest oil yield was then tested at lower temperatures of 350°C and 400 °C with the same residence time. The optimum composition of bentonite clay catalyst was 15% at 450 °C. Without the catalyst (0% composition), the oil yield was 54.2%, which increased to 66% from a total feedstock of 500 g, and when compared to the plastic mass of 425 g, the oil yield reached 82.5%. The density of the oil was 0.766 g/ml, the viscosity was 1.53 cP, and the calorific value was 11302.33 cal/g. LDPE pyrolysis oil with bentonite clay catalyst showed characteristics closer to diesel fuel and kerosene. Thus, LDPE pyrolysis oil has the potential to be used as an alternative substitute for diesel fuel in energy applications.

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