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Pengaruh Variasi Jarak Nosel dan Kecepatan Udara Inlet terhadap Tekanan dan Kecepatan Hisap pada Pompa Vakum Jet Ejector Arasy Fahruddin; Lukman Hudi; Bambang Surono; Mulyadi Mulyadi
TURBO [Tulisan Riset Berbasis Online] Vol 15 No 1 (2026): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v15i1.5104

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This study aims to analyze the effect of variations in nozzle spacing and inlet air velocity on the vacuum pressure and flow velocity distribution in a jet ejector vacuum pump. The method used is a numerical simulation based on Computational Fluid Dynamics (CFD) to obtain a detailed picture of the fluid flow characteristics in the system. The variations in nozzle spacing studied include 14 mm, 16 mm, and 18 mm, while the inlet air velocity is varied at 10 m/s, 15 m/s, and 20 m/s. The simulation results show that increasing the nozzle spacing tends to reduce the pressure on the venturi, thereby increasing the vacuum effect, with optimal conditions obtained at a distance of 18 mm and an inlet velocity of 10 m/s. Under these conditions, the pressure in the tube reaches the lowest value compared to other variations. However, increasing the inlet air velocity actually causes an increase in pressure in the tube due to turbulence and backflow, thereby reducing or even eliminating the vacuum effect at velocities of 15 m/s and 20 m/s. Overall, the performance of a jet ejector is greatly influenced by a combination of geometric and operational parameters.
Analisis Pengaruh Variasi Bentuk Sudden Enlargement terhadap Head Loss pada Aliran Udara Laminar Satria Agung Wibisono; Ali Akbar; A’rasy Fahruddin; Rachmat Firdaus; Muhammad Syahril
Jurnal Mesin Nusantara Vol 8 No 2 (2025): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v8i2.24788

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Fenomena sudden enlargement pada sistem perpipaan merupakan salah satu penyebab utama terjadinya head loss yang dapat menurunkan efisiensi aliran fluida. Penelitian ini bertujuan untuk menganalisis pengaruh variasi bentuk sudden enlargement terhadap kehilangan energi pada aliran fluida laminar dengan menggunakan tiga variasi geometri, yaitu Square Edge, Rounded Edge, dan Projecting Edge. Pengujian dilakukan pada pipa berbahan akrilik menggunakan manometer U sebagai alat ukur tekanan dengan dua titik pengukuran, masing-masing pada diameter 12,7 mm dan 50 mm. Dua tingkat laju aliran udara diuji, yaitu 6 L/menit dan 4 L/menit. Data tekanan yang diperoleh diolah untuk menghitung kecepatan aliran dan head loss menggunakan persamaan dasar fluida. Hasil penelitian menunjukkan bahwa bentuk geometri memiliki pengaruh signifikan terhadap besarnya head loss. Pada laju aliran tinggi (6 L/menit), geometri Square Edge menghasilkan head loss terendah, sedangkan Rounded Edge memberikan performa optimal pada laju aliran rendah (4 L/menit). Geometri Projecting Edge secara konsisten menghasilkan head loss tertinggi pada kedua kondisi. Temuan ini menunjukkan bahwa pemilihan geometri sudden enlargement harus disesuaikan dengan kondisi operasi sistem. Penelitian ini diharapkan dapat menjadi referensi dalam perancangan instalasi perpipaan yang lebih efisien dan mendukung optimasi energi pada sistem transportasi fluida.
Design and Structural Analysis of Meatball Printing Machine with Arduino Uno-Based Security System for Operator Protection Bayu Surya Ramadhan; Edi Widodo; A'rasy Fahruddin; Mulyadi
SAINSTECH NUSANTARA Vol. 2 No. 4 (2025): November 2025
Publisher : Nusantara Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71225/jstn.v2i4.119

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This study presents the design and structural verification of a compact meatball-forming machine that integrates an Arduino Uno–based operator protection system. A redesigned 500×500×1011 mm frame made of 20×20×1.5 mm hollow steel was modeled in SolidWorks 2024 and evaluated using finite element analysis (von Mises stress, displacement, strain, and safety factor) under an applied load representing a 30 kg operating condition. To reduce assembly complexity, two alternative concepts were assessed using Design for Assembly (DFA), and the most efficient configuration was selected for detailed development. The safety subsystem employs an HC-SR04 ultrasonic sensor facing the operator zone; when the detected distance falls below 10 cm, the controller triggers a warning indicator and enables protective control actions. The final concept achieved higher DFA efficiency (18%) than the initial concept (16%) while reducing material use and overall footprint. Structural simulations indicate a peak von Mises stress of 163.6 MPa, below the 250 MPa yield strength of ASTM A36 steel, a maximum displacement of 1.002 mm, and a minimum safety factor of 1.528, confirming adequate stiffness and margin against yielding. The proposed design combines adjustable forming via an iris mechanism with servo-driven cutting to improve process consistency while embedding real-time proximity sensing to enhance occupational safety.
Pressure Variation and Heat Transfer in Pokka 5001 Condenser: Perubahan Tekanan dan Perpindahan Panas pada Kondensor Pokka 5001 Rendy Rakhmad Fakhrizi; A’rasy Fahruddin; Mulyadi; Edi Widodo
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2100

Abstract

General Background Condensers play a crucial role in thermal systems by converting steam into liquid through heat transfer processes. Specific Background The performance of condensers is influenced by key parameters such as pressure, temperature, and fluid flow rate, particularly in finned tube systems. Knowledge Gap Previous studies have examined general condenser performance, but limited research has focused on Pokka 5001 type condensers with louvered fins under varying pressure conditions. Aims This study aims to analyze the efficiency and heat transfer rate of a Pokka 5001 condenser using pressure variations as the primary variable. Results Experimental results show that increasing pressure from 20 to 40 Psi leads to higher efficiency values, ranging from 73.17% to 89.68%, and improves heat transfer rate and fluid work. Additionally, higher flow rates contribute to increased heat transfer performance. Novelty This study provides experimental evaluation of a Pokka 5001 finned tube condenser with controlled pressure variation and airflow conditions. Implications The findings support better operational control of pressure and flow rate to maintain optimal condenser performance in thermal systems. Keywords: Condenser Pressure, Heat Transfer, Efficiency Analysis, Finned Tube, Thermal System Key Findings Highlights Efficiency increases consistently with rising operating pressure Flow rate growth correlates with higher thermal transfer performance Experimental data identify optimal operating conditions
Dough Mixer Machine Design Increases Cracker Production Capacity: Desain Mesin Pengaduk Adonan Meningkatkan Kapasitas Produksi Kerupuk Muhammad Anggie Cahya Saputra; Mulyadi; A’rasy Fahruddin; Edi Widodo
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2126

Abstract

General Background: Productivity and consistency are essential factors in food processing industries, particularly in small and medium enterprises. Specific Background: Manual dough mixing in cracker production often results in low efficiency and inconsistent product quality. Knowledge Gap: Limited studies focus on practical machine design that addresses both productivity and consistency in small-scale cracker production. Aims: This study aims to design and develop a dough mixer machine to improve production capacity and mixing consistency. Results: The developed machine demonstrates improved mixing performance, increased production capacity, and more uniform dough compared to manual processes. Novelty: The study presents a practical machine design tailored for small-scale industries with specific capacity considerations. Implications: The results provide a reference for implementing appropriate technology to support productivity improvement in small-scale food production. Keywords: Dough Mixer, Machine Design, Productivity, Small Industry, Food Processing Key Findings Highlights Mechanical system enables higher output compared to manual mixing Process uniformity improves through controlled rotation mechanism Design supports small-scale production requirements
Manufacturing Analysis of Banana Slicer Machine Capacity 59 kg Hour: Analisis Produksi Mesin Pengiris Pisang dengan Kapasitas 59 kg per Jam Nabil Azka Hanani; Mulyadi; Edi Widodo; A’rasy Fahruddin
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2127

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General Background: Banana processing is an important agro-industrial activity in Indonesia, particularly for producing banana chips with consistent quality. Specific Background: Conventional manual slicing methods are inefficient and result in inconsistent thickness, limiting productivity and product quality. Knowledge Gap: Previous approaches have not fully integrated manufacturing process analysis with time, cost, and performance evaluation in a single machine design. Aims: This study aims to analyze the manufacturing process of a banana slicer machine with a capacity of 59 kg/hour, including time estimation, cost calculation, and performance testing. Results: The manufacturing process consists of cutting, drilling, welding, turning, and milling, resulting in a total production time of 29.63 hours and a total cost of Rp 5,058,262. Performance testing shows that the use of three blades produces the most consistent slice thickness of 2 mm with good quality output. Novelty: The study integrates detailed manufacturing time analysis, cost estimation, and performance evaluation within a single machine development framework. Implications: The findings provide practical guidance for improving production efficiency and product quality in small to medium-scale banana processing industries. Keywords: Banana Slicer, Manufacturing Process, Production Cost, Machine Performance, Agro-Industry Key Findings Highlights Total fabrication duration reached 29.63 hours with structured process stages Optimal blade configuration identified for uniform slice thickness Economic calculation established selling value with defined profit margin
Waste Melting Stove Achieves 25 Kilogram Per Hour Capacity: Kompor Pelebur Sampah Mampu Memproses 25 Kilogram Per Jam Faris Ferdiansyah; Mulyadi; Edi Widodo; A`rasy Fahruddin
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2129

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General Background: Organic waste accumulation presents significant environmental challenges, including methane emissions and pollution. Specific Background: Conventional waste treatment methods often require high energy consumption and incur substantial operational costs. Knowledge Gap: There is limited development of low-cost waste melting systems utilizing alternative fuels such as used oil combined with water to support combustion. Aims: This study aims to design, manufacture, and evaluate the performance of an organic waste melting stove using a mixture of used oil and water. Results: The manufacturing process involves design, material selection, fabrication, assembly, and testing, with a total production time of approximately 635 minutes. The total production cost is calculated at Rp 2,719,100, and the selling price is determined at Rp 3,534,830 with a 30% profit margin. Performance testing shows that a 4 mm nozzle achieves a combustion capacity of 25 kg/hour, while an 8 mm nozzle produces 7 kg/hour. Novelty: The study introduces a waste melting stove integrating alternative fuel from used oil and water with detailed manufacturing cost and performance evaluation. Implications: The system provides a practical and economical solution for organic waste processing and supports sustainable waste management practices. Keywords: Waste Melting Stove, Used Oil Fuel, Combustion Capacity, Manufacturing Cost, Waste Management Key Findings Highlights Fabrication completed within 635 minutes using structured stages Smaller nozzle configuration produced higher burning throughput Economic calculation defined marketable price with profit margin
Forged Piston Delivers Higher Power and Torque in Jupiter Z: RCM II Mengidentifikasi Komponen GTG yang Kritis dan Strategi Pemeliharaan Muchamad Reysa Pahlewi; Dr.A’rasy Fahruddin; Ali Akbar; Mulyadi
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2132

Abstract

General Background: Automotive development increasingly emphasizes component material selection and manufacturing methods to optimize engine performance. Specific Background: Pistons are critical engine components whose production route, particularly casting and forging, may influence power and torque characteristics. Knowledge Gap: Although many studies discuss piston materials and engine performance separately, direct comparative experimental evidence between casting and forged pistons under identical operating conditions on the Yamaha Jupiter Z 2007 remains limited. Aims: This study aims to analyze the differences in power and torque generated by standard, casting, and forged pistons using dynotest measurements at 2000, 4000, 6000, and 8000 RPM. Results: The results indicate that forged pistons produced the highest overall performance, with average torque reaching 13.32 Nm at 2000 RPM and average power reaching 11.2 HP at 6000 RPM. Casting pistons occupied an intermediate position, while standard pistons consistently produced the lowest values. At high engine speed, forged pistons maintained better performance stability than casting and standard pistons. Novelty: The study directly compares three piston types within the same motorcycle platform while also relating performance differences to piston mass variation, where forged pistons showed the lightest weight. Implications: These findings indicate that piston manufacturing type is closely associated with engine output, and forged pistons offer stronger potential for applications requiring higher power and torque performance. Keywords: Forged Piston, Casting Piston, Engine Performance, Power and Torque, Dynotest Key Findings Highlights Forged pistons produced the highest output across most engine speed ranges. Peak engine capability was observed around 6000 RPM before declining at 8000 RPM. Lower piston mass was associated with stronger high-speed performance stability.
Combined Aerodynamic Modifications Reduce Drag in MPV Vehicles: Modifikasi Aerodinamis Terpadu Mengurangi Hambatan Udara pada Kendaraan MPV Adinda Maydana; A'rasy Fahruddin
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2133

Abstract

General Background: Aerodynamic characteristics play an important role in vehicle performance because air resistance directly affects fuel consumption and maximum speed. Specific Background: Winglet bumpers and rear spoilers are commonly applied aerodynamic devices intended to regulate airflow around vehicles and reduce drag. Knowledge Gap: Although aerodynamic devices have been widely studied, limited experimental evidence directly compares the combined application of bumper winglets and rear spoilers on MPV-type vehicles under controlled wind tunnel conditions. Aims: This study aims to analyze the effect of bumper winglets, rear spoilers, and their combination on air drag acting on an MPV model. Results: Experimental testing was conducted in a wind tunnel using wind speed variations of 7 m/s, 8.5 m/s, and 10 m/s under four configurations: without modification, winglet bumper, rear spoiler, and combined modification. The results show that all aerodynamic modifications reduced drag force and drag coefficient compared with the unmodified model. The combined configuration produced the best result, achieving the largest drag coefficient reduction of 38% at 8.5 m/s. Novelty: This study directly compares individual and combined aerodynamic modifications on an MPV prototype using controlled wind tunnel testing. Implications: The findings indicate that the combined use of bumper winglets and rear spoilers offers a practical aerodynamic strategy for reducing drag and improving high-speed vehicle efficiency. Keywords: Aerodynamics, Drag Coefficient, Winglet Bumper, Rear Spoiler, Wind Tunnel Key Findings Highlights The combined configuration generated the lowest measured air resistance. The largest reduction was recorded at 8.5 m/s. Airflow became more stable with smaller wake formation behind the vehicle.
Static Load Simulation for Optimizing Automatic Fish Cracker Dough Mixing Machine Design: Simulasi Beban Statis untuk Mengoptimalkan Desain Mesin Pencampur Adonan Kerupuk Ikan Otomatis Mohamad Irvan Akif Setiawan; Mulyadi; A'rasy Fahruddin
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2134

Abstract

General Background Fish crackers are a popular Indonesian snack with a simple production process but high demand. Specific Background In Pasuruan Regency, SMEs struggle with manual dough mixing, which leads to inconsistent texture and high labor costs. Knowledge Gap Current traditional methods lack efficiency and structural consistency, requiring a more robust and hygienic automated solution. Aims This study aims to design and validate an automatic fish cracker dough mixing machine using static load simulations. Results The selection process using a morphological chart led to Concept A, which utilizes a 0.37 kW motor and stainless steel components. SolidWorks 2016 simulations revealed a maximum von Mises stress of 14.224 MPa and a maximum displacement of 8.74 mm under a 92 Nm torque load. Novelty The research introduces a highly stable frame structure (50x50x3 mm profile) with a safety factor of 13, significantly exceeding standard safety requirements for SME equipment. Implications This innovation allows for consistent 10 kg batch production, reducing manual labor and increasing the profit potential for local food industries. Keywords Dough Mixer, Fish Crackers, Morphological Chart, Static Simulation, Safety Factor Key Findings Highlights Concept A was selected as the optimal design using a systematic morphological chart and FEA validation. The frame structure achieves a safety factor of 13, ensuring high durability for small-scale industrial use. The automated system replaces manual labor with a 0.37 kW motor capable of handling 10 kg loads efficiently.
Co-Authors Abdul Rosyid Abdullah Barafi, Keigen Achmad Febriyan Ikhsanudin Adi Irawan Adinda Maydana Aditya Pratama Afif Fakhruddin Agung Budy Wijoyo Agus Hermawanto Ahmad Ahfas Ahmad Bukhori Akhmad Ahfas Al Amien, Mochammad Sandi Alamsyah, Candra Firman Ali Akbar Ali Akbar Alifiana , Yesi Andika Tri Serviantyo Sukma Kusnadi Andre Fajariansyah Andrea Setiawan Andriani Eko Prihatiningrum Anggit Prastio Anom Isti , As’ad Araffi, Moh. Faisal Arif Wisnu Isha Mahendra Barafi, Keigant Abdullah Bayu Surya Ramadhan Budiandari, Rahma Utami Dewanto, Dodik Hari Djatmiko Ichsani Edi Widodo Edi Widodo, Edi Edmundo Tiago Belo Efendi, Moch Miqdar Eko Prasetio Putro Erwin Yuli Susanto Eryandrie Wicaksono, Majdi Fajar Riyanto Faris Ferdiansyah Febriyan Ikhsanudin, Achmad Fernanda, Rexy Eca Fernando, Ekki Hardy Sujiatanti, Septia Herman Herman Herman Sugianto Heru Santoso iswanto Iswanto -, Iswanto Iswanto Iswanto Iswanto Iswanto Iswidiyanto, Vicky Iwan Hadi Suratno Izza Anshory Junggie Guko Armfirst Komarudin, Udin Lukman Hudi Luthfi Frans Setiawan Martoni Maulana, Achmad Bagas Moch Miqdar Efendi Mochamad Aldhy Saputro Alamsyah Mochamad Vicky Fadli Mochammad Sandi Al Amien Mohamad Hakam Mohamad Irvan Akif Setiawan Muchamad Reysa Pahlewi Muhammad Anggie Cahya Saputra Muhammad Ibrahim Muhammad Iqbal Nur Fadillah Muhammad Rizal Ma’arif Muhammad Rosyidi Muhammad Syahril MULYADI Mulyadi Mulyadi Mulyadi Mulyadi Muslichah Erma Widiana Nabil Azka Hanani Nia Nuraeni Suryaman Nugroho, Wistyo Nugroho Nurrochman, Mochammad Pangestu, Eka Adji Prantasi Harmi Tjahjanti Prasetia, Adhita Purboyo, Prido Dwi Purgiantono, Purgiantono Puspawarna, Rangga Bayu Putro, Eko Prasetio R Dimas Adityo Rachmat Firdaus Rangga Bayu Rendy Rakhmad Fakhrizi Rexy Eca Fernanda Ribangun Bamban Jakaria Rico Ryan Ernanda Ridho Choirul Anam Rokhman, Fatori Royyan Firdaus Ryan Ernanda, Rico Saiful Bahri Satria Agung Wibisono Satria Candra Laksmana Sayyid Muhammad Al Ghofur Sektiawan, Hadi Bagus Septian Firmansyah Sigit Hermawan Sulis Yulianto Surono, Bambang Suryaman, Nia Nuraeni Sutejo, Herman Therix Vernanda Rikmawan Wibisono , Satria Agung Wijoyo, Agung Budy Windarta Windarta Windarta, Windarta Yoyok Wahyudi Yudistira, Muhammad Dwi Andika Yulianto, Mochammad Yunus, Moh