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Toto Supriyono
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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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Design of a cyclone separator with circumfluent cyclone and convergent vortex finder for spray drying Anis Aprilia
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/y9vm1663

Abstract

Coconut milk is prone to spoilage due to its high-water content. Spray drying can extend its shelf life, but conventional cyclone separators often experience re-entrainment and high pressure drop. This study proposes a cyclone separator design with a Circumfluent Cyclone (CFC) structure and a Convergent Vortex Finder (CVF) to improve particle separation. The design was based on analytical calculations involving swirl number and vortex behavior. A prototype with a diameter of 0.11 meters was fabricated and tested under varying air flow rates from 10 to 30 cubic meters per hour and temperatures from 120 to 150 degrees Celsius. The results showed a particle collection efficiency of 100 percent and a minimum pressure drop of 569 pascals. However, this efficiency does not fully represent the actual performance of the cyclone separator because the particles entering the system were large, agglomerated, and oily, which did not match the intended design conditions. Despite this, the modified design successfully reduced reentrainment and improved flow stability.
CFD2CFD: How computational fluid Dynamics can be a means towards sustainable conscious field dynamics M Hilman Gumelar Syafei; Rizianiza, Illa; Siswantara, Ahmad Indra; Angga Septiyana; Adi Syuriadi; Muhammad Agung Santoso; Ahmad Syihan Auzani
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/eeff4w73

Abstract

The role of Computational Fluid Dynamics (CFD) across diverse applications has been significantly reinforced by rapid advancements in numerical computation, artificial intelligence, and high-performance computing. Nevertheless, prevailing applications of CFD predominantly operate as simulation tools and technical solutions, often neglecting dimensions of awareness, intentionality, and ethical considerations. This study introduces the CFD2CFD paradigm (Computable Field Dynamics to Conscious Field Dynamics), which is conceptualized within the DAI5 framework—comprising Deep Awareness of I, Intention, Initial Thinking, Idealization, and Instruction Set. In this paradigm, Computable Field Dynamics is defined as the material field that can be mathematically represented and numerically resolved, while Conscious Field Dynamics denotes the immaterial field of awareness. To demonstrate this approach, case studies are conducted on representative material fluid phenomena, namely pipe flow, airfoil aerodynamics, and biomass pyrolysis. The integration of Computable Field Dynamics and Conscious Field Dynamics through the DAI5 framework establishes a novel methodological pathway. The contribution of the CFD2CFD paradigm lies in its provision of a computational approach that extends beyond scientific accuracy to encompass sustainability considerations. More importantly, this paradigm is formulated as an epistemic bridge uniting material and immaterial fields, thereby offering a framework for methods that are simultaneously rigorous in scientific validity and oriented toward sustainability.
Development of a microfluidic paper based with portable system for glucose concentration colorimetric analysis Irwansyah, Ridho; Herdian, Muhammad Bintang; 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: 10.71452/2eqhby13

Abstract

Diabetes mellitus is a major health problem in Indonesia, with a prevalence of up to 20.4 million people in 2024 according to the International Diabetes Federation (IDF). Early detection of blood sugar is hampered by expensive and difficult-to-access diagnostic tools. Microfluidic paper-based analytical devices (μPADs) are a potential solution because they are inexpensive, portable, and environmentally friendly, in accordance with WHO ASSURED standards. This study aims to develop a μPAD integrated with a portable detection system for colorimetric quantification of glucose concentration using Glucose Oxidase–Peroxidase Aminoantipyrine (GOD-PAP) reagent, which produces a color change proportional to glucose concentration. Initial testing was conducted on phosphate-buffered saline (PBS) and D-glucose solutions as test materials in glucose concentration research. The test materials will be validated using spectrophotometry. Next, the test materials will be applied to μPAD for colorimetric observation using an RGB sensor on a portable device. The quantification results show that the red ratio at 10 minutes of the colorimetric method has excellent linearity (R² = 0.96). Precision validation of the colorimetric method produced an RSD value of less than 5%. The paired t-test produced a p-value of 0.42 with a 95% confidence level, indicating that there was no significant difference between the glucose concentration quantification results obtained using the colorimetric method and the spectrophotometric method.
Thermal performance enhancement in electric motor rotors: Evaluating the impact of rotating heat pipes Rezqi, Khairu; Putra, Nandy; Sholahudin, Sholahudin; Kiswanto, Gandjar
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/hdn06j82

Abstract

Effective thermal management is essential in high-performance electric motors, where rotor overheating accelerates demagnetization and reduces operational lifespan. This study investigates a horizontally mounted, wick based rotating heat pipe (RHP) as a passive cooling solution for an induction motor rotor. The system was subjected to stepped heat loads 20, 25, 30, and 35 W, also and speeds 0, 250, 500, 750 RPM, with time resolved measurements acquired to evaluate steady state thermal resistance (Rth) and transient response. The results reveal a non monotonic relationship between rotational speed and thermal performance. Contrary to initial assumptions, the RHP achieved its lowest Rth of 0.164 °C/W not at standstill, but at a moderate speed of 250 RPM. This performance peak is attributed to a balanced interplay where gentle centrifugal force enhances capillary-driven liquid distribution, maximizing effective evaporation without inducing flow instability. Compared to the solid rotor baseline, the RHP consistently reduced rotor temperatures by up to 6 °C and lowered thermal resistance by more than 70%. Additionally, the RHP halved the thermal time constant following each power step, indicating superior transient regulation. The identification of an optimal rotational speed window, distinct from any transitional instability zone, offers critical design insight for embedding RHPs in next-generation electric machines where spatial constraints and thermal reliability are paramount.
Analysis of bolted joint loosening due to structural vibrations using short-time fourier transform and wavelet transform Ramsi, Rahmatsyah Maksum
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: 10.71452/3wteep54

Abstract

This research investigates the influence of bolt loosening on the dynamic behavior of a steel beam structure under continuous vibration excitation for 30 minutes. Bolted joints play a critical role in maintaining structural integrity; however, loosening caused by vibration remains one of the most common failure mechanisms in mechanical structures. To capture the effect of bolt loosening, acceleration responses were analyzed using time-domain inspection, Fast Fourier Transform (FFT), Short-Time Fourier Transform (STFT), and Continuous Wavelet Transform (CWT). The experimental setup involved controlled vibration excitation applied to a steel beam with bolted connections, and response signals were recorded at different stages of loosening progression. The time-domain analysis showed a gradual reduction in acceleration amplitude as bolt tightness decreased, indicating energy dissipation and stiffness loss. FFT provided an overview of frequency content but lacked sensitivity to localized variations. STFT and CWT enabled a more detailed examination of the time-frequency domain, revealing a loss of high-frequency components and significant redistribution of energy patterns during the loosening process. Both methods successfully identified shifts in natural frequencies and variations in response amplitude. Especially, CWT exhibited superior resolution in detecting early-stage loosening compared to STFT, making it more effective for practical monitoring applications. These results highlight the potential of time-frequency analysis as a diagnostic tool for vibration-based Structural Health Monitoring (SHM) systems. Early detection of bolt loosening through non-destructive vibration analysis can improve safety, reduce maintenance costs, and extend the service life of mechanical structures.
Bell casting using gema’s local clay: Mold performance and gating design influence variations Masnur, Dedy
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/zeg34d84

Abstract

Indonesia has a large potential of natural clays, one of which is located in Gema Village, Lipat Kain Subdistrict, Kampar Regency, Riau Province. This study aims to examine the use of Gema clay as a molding material and gating system design for bell making through a number of defects, dimensional accuracy, and hardness values. The molds were designed with a sprue; two sprues; and a sprue and a riser. The Gema village clay was formed into two mold halves, the lower and upper molds. Then, the molds were dried and sintered at 359 °C. Al-4.5wt.%Cu was melted in a crucible furnace to 780 °C, then poured into the mold. The defects were observed, the representative of dimensions and the hardness were measured.  The results show there are two types of defects that were observed as a result of the use of clay and channel system: incomplete casting and pin holes. The a sprue and a riser design has a lowest percentage error of 0.35% and a hardness of 56.486 VHN.
Tool geometry influence on the tensile load of copper–AA1100 joint using two stage refilled friction stir spot welding (TS-RFSSW) Trinita Salsabila, Hikaru; Sunar Baskoro, Ario; Herdiyan Maritza Salsabila, Shafira; 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/hw8ka649

Abstract

Two stage refilled friction stir spot welding (TS-RFSSW) is a method to eliminate keyholes formed in the friction stir spot welding (FSSW). This study aims to investigate the effect of tool geometry on the tensile shear loads of joints produced by TS-RFSSW. Copper and aluminum AA110 sheets with a thickness of 0.42 mm were joined using the TS-RFSSW process. The tools used in the first stage have taper and triangular pins. In the second stage, pinless tools with 5 mm and 6 mm diameters were used to close the keyhole. Other process parameters used included a dwell time of 4 seconds, a plunge depth of 600 µm, and a tool tilt angle of 0⁰. The TS-RFSSW process successfully produced improved joint surfaces with minimal keyholes, resulting in increased tensile shear loads. The tool with a triangular pin produced joints with higher tensile shear loads due to more intensive material flow. On the other hand, increasing the diameter of the pinless tool for the second stage reduced the tensile shear loads of the joints. The maximum tensile shear load achieved was 292.78 ± 34.72 N using a triangular pin tool for the first stage and a 5 mm pinless tool for the second stage. 
Analisis pengaruh penggunaan genset tambahan terhadap konsumsi bahan bakar pada kapal Ro-Ro 3500 DWT Muzhoffar, Dimas Angga Fakhri; Santoso, Muhammad Agung; Riadi, Achmad; Nunni, Raffa Bainan; Wiambodo, Arindra Nur Rakhman
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/w96h4a73

Abstract

Dalam industri perkapalan Indonesia, kapal bekas pakai sering kali menjadi pilihan untuk rute tertentu. Kapal-kapal ini kerap dioperasikan melampaui umur ekonomisnya. Kondisi ini mengakibatkan pola operasional yang tidak lagi sesuai dengan spesifikasi mesin bantu (AE), khususnya pada mode idle saat menunggu berlabuh, di mana beban listrik jauh di bawah rentang optimal AE. Sebagai solusi, dilakukan retrofit dengan menginstal genset tambahan (GT) berdaya lebih kecil. Penelitian ini menganalisis data historis konsumsi bahan bakar sebelum dan setelah retrofit untuk mengevaluasi keefektifan langkah tersebut. Hasilnya menunjukkan penghematan bahan bakar yang signifikan. Pendekatan teoritis berdasarkan spesifikasi teknis mesin mengungkap bahwa sebelum retrofit, AE beroperasi di luar area efisiensi optimalnya akibat usia ekonomisnya. Sementara, GT yang masih baru, beroperasi pada rentang beban yang sesuai dengan spesifikasinya, sehingga konsumsi bahan bakarnya lebih efisien. Temuan penelitian ini memberikan kerangka kerja praktis untuk mengidentifikasi ketidakefisienan operasional mesin. Hasil dan pembahasan yang disajikan diharapkan dapat menjadi acuan dalam pemetaan parameter operasi, optimasi kinerja mesin, dan perencanaan retrofit. Akhirnya, penelitian ini diharapkan dapat menjadi panduan bagi operator kapal dalam menyusun strategi operasi yang berkelanjutan, termasuk pengendalian konsumsi bahan bakar dan penetapan target reduksi emisi.
Optimasi pengurangan massa superstruktur dan hatch cover kapal ikan 5 GT Putra, Gerry Liston; Budiono, Hendri; Istiyanto, Jos
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/mkenzf29

Abstract

Indonesia sebagai salah satu negara kepulauan terbesar memiliki potensi besar di sektor maritim. Pemerintah Indonesia menempatkan industri perkapalan sebagai salah satu sektor prioritas untuk dikembangkan. Industri galangan kapal menghasilkan berbagai produk, termasuk kapal dan bangunan lepas pantai, dengan kapal ikan sebagai salah satu produk utamanya. Kapal ikan berfungsi untuk menangkap sekaligus membawa hasil tangkapan. Sebagian besar kapal ikan tradisional masih terbuat dari kayu yang membutuhkan perawatan tinggi dan biaya besar. Modernisasi kapal ikan dengan penggunaan material seperti baja, aluminium 5083, dan HDPE menjadi penting untuk meningkatkan daya saing nelayan.Penelitian ini mengoptimalkan bagian superstruktur dan fish hold hatch cover pada kapal ikan 5 GT menggunakan metode Finite Element Method (FEM) dan persamaan bending stress untuk mengurangi massa kapal. Hasil optimasi menunjukkan bahwa tegangan yang terjadi pada struktur tetap memenuhi standar badan klasifikasi. Optimasi menghasilkan penurunan berat yang signifikan: untuk material mild steel, penurunan berat superstruktur sebesar 45% dan hatch cover sebesar 46%. Untuk aluminium 5083, penurunan berat superstruktur sebesar 17,34% dan hatch cover sebesar 18,95%. Sebaliknya, pada material HDPE terjadi peningkatan berat struktur sebesar 78,08 kg atau sekitar 161,857% dari berat desain. Temuan ini menegaskan pentingnya pemilihan material dan ketebalan pelat yang tepat guna mencapai efisiensi optimal dalam konstruksi kapal ikan.
Literature review Plate Heat Exchanger Mahfuzi, Emil
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/b1k1jd19

Abstract

Plate heat exchangers (PHEs) are indispensable devices in numerous industrial applications due to their high heat transfer efficiency, compact design, and operational flexibility. This article provides a comprehensive review of advancements in PHE technology, drawing upon recent research to consolidate current knowledge and identify future research directions. The review employs a thematic approach, categorizing research into key areas: plate geometry and configuration, fluid flow distribution and pressure drop characteristics, analytical and numerical modeling and simulation techniques, design optimization methodologies, the application of nanofluids and other advanced working fluids, and innovations in materials and configurations. A critical review of selected influential articles is also presented, highlighting their specific contributions and methodologies. The discussion reveals that continued advancements in plate design, sophisticated modeling tools like CFD, and the exploration of novel fluids such as nanofluids are significantly enhancing PHE performance. However, challenges persist, particularly in accurately modeling two-phase flows, mitigating fouling, and developing advanced materials. Future research directions include the integration of additive manufacturing for complex geometries, the implementation of smart and adaptive control systems, and a greater emphasis on lifecycle sustainability. This review underscores the pivotal role of PHEs in driving energy efficiency and sustainability across various industrial sectors.

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