Engineering in Green Machinery
Jurnal ENIGMA (Engineering in Green Machinery) berfokus pada penelitian dan inovasi di bidang teknik mesin yang mendukung keberlanjutan dan ramah lingkungan. Jurnal ini mencakup berbagai topik yang berkaitan dengan penerapan teknologi hijau dalam desain manufaktur, energi terbarukan, konversi energi, dan material maju. Artikel yang diterima dalam jurnal ini diharapkan dapat memberikan kontribusi signifikan terhadap pengembangan solusi teknologi yang efisien, inovatif, dan berkelanjutan. Berikut adalah fokus dan ruang lingkup dari Jurnal ENIGMA: 1. Desain Manufaktur Fokus pada pengembangan dan inovasi dalam desain dan proses manufaktur yang efisien, ramah lingkungan, serta dapat mengurangi dampak negatif terhadap lingkungan. Topik yang dibahas meliputi: Desain Produk Berkelanjutan: Penggunaan prinsip desain yang mengutamakan efisiensi sumber daya dan minimisasi limbah. Proses Manufaktur Hijau: Teknik produksi yang meminimalkan penggunaan energi dan bahan baku, serta mengurangi emisi dan polusi. Desain untuk Daur Ulang: Pengembangan produk yang dapat dengan mudah didaur ulang atau digunakan kembali setelah habis masa pakainya. Industri 4.0 dalam Manufaktur: Penerapan teknologi canggih seperti otomatisasi, robotika, dan Internet of Things (IoT) dalam meningkatkan efisiensi dan keberlanjutan proses manufaktur. 2. Energi Terbarukan Fokus pada riset dan pengembangan dalam pemanfaatan energi terbarukan untuk mendukung transisi global menuju sistem energi yang lebih berkelanjutan. Beberapa topik yang dibahas antara lain: Sistem Pembangkit Energi Terbarukan: Penelitian tentang teknologi pembangkit energi dari sumber terbarukan seperti tenaga surya, angin, biomassa, geotermal, dan hidro. Integrasi Energi Terbarukan: Studi tentang cara mengintegrasikan berbagai sumber energi terbarukan dalam jaringan energi yang ada, termasuk penyimpanan energi dan sistem distribusi yang efisien. Efisiensi Energi: Pengembangan teknologi dan strategi untuk meningkatkan efisiensi dalam penggunaan energi terbarukan, serta mengurangi ketergantungan pada sumber daya energi fosil. Pengelolaan dan Penyimpanan Energi: Teknologi penyimpanan energi (battery storage, energi terkompresi, dan lain-lain) yang memungkinkan penggunaan energi terbarukan secara lebih stabil dan efisien. 3. Konversi Energi Fokus pada teknologi yang digunakan untuk mengubah energi dari satu bentuk ke bentuk lain yang lebih efisien dan ramah lingkungan. Beberapa area yang dicakup adalah: Konversi Energi Termal: Penelitian terkait konversi energi panas, seperti dalam sistem pembangkit listrik tenaga panas bumi, tenaga surya termal, atau pemanas industri berbasis energi terbarukan. Konversi Energi Mekanik dan Listrik: Teknologi yang mengubah energi mekanik atau kinetik (seperti energi angin atau gelombang laut) menjadi energi listrik yang dapat dimanfaatkan. Pemanfaatan Energi Biomassa: Penelitian mengenai konversi biomassa (seperti limbah pertanian atau biomassa industri) menjadi energi yang dapat digunakan, termasuk teknologi gasifikasi, pirolisis, dan biogas. Sistem Energi Hybrid: Pengembangan sistem energi yang menggabungkan berbagai sumber energi terbarukan dan konvensional untuk meningkatkan keandalan dan efisiensi sistem energi. 4. Material Maju Fokus pada pengembangan material baru dengan sifat yang lebih unggul dibandingkan material konvensional, serta material yang berkontribusi pada teknologi yang lebih efisien dan ramah lingkungan. Area yang termasuk dalam ruang lingkup ini adalah: Material Komposit: Pengembangan material komposit yang lebih ringan, lebih kuat, dan lebih ramah lingkungan untuk berbagai aplikasi industri, termasuk kendaraan ramah lingkungan dan energi terbarukan. Material Berkelanjutan: Penelitian tentang material yang dapat diproduksi dengan proses yang lebih hemat energi dan ramah lingkungan, serta memiliki daya tahan yang lebih lama. Material Nano: Penggunaan nanoteknologi untuk menciptakan material dengan sifat yang lebih unggul, seperti efisiensi termal yang lebih tinggi, ketahanan korosi, atau kemampuan penyimpanan energi yang lebih baik. Material untuk Aplikasi Energi: Material yang digunakan dalam sistem konversi energi, seperti bahan untuk sel surya, baterai, atau superkapasitor, serta material yang mendukung efisiensi dalam penggunaan energi.
Articles
19 Documents
<![CDATA[PERAWATAN ENGINE DIESEL KTA 38 G5 SEBAGAI PENGGERAK GENERATOR SARANA POWER PLANT PPSDM MIGAS CEPU ]]>
<![CDATA[RAHMAD DZIKKRUL DWI PASETYO]]>;
<![CDATA[Alviani Hesthi Permata Ningtyas]]>
<![CDATA[ ENIGMA: Engineering in Green Machinery Vol. 2 No. 1 (2025): Juli ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Gresik ]]>
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DOI: 10.30587/enigma.v2i1.10637
<![CDATA[Kilang PPSDM Migas merupakan unit Crude Distilling Atmospheric (CDU) yang merupakan pengolahan primer dalam pengolahan minyak bumi. operasional kilang. Power plant merupakan salah satu unit yang terdapat di PPSDM MIGAS yang bergerak di bidang Pembangkit Listrik Tenaga Diesel (PLTD). Komponen utama dalam diesel engine terdiri dari silinder liner, kepala silinder, torak (piston), batang engkol, poros engkol, roda gila, poros nok, karter, sistem bahan bakar, ring piston dan juga memiliki beberapa sistem pendukung meliputi fuel injencion system, cooling system, lubrication system, dan air intake system. Kegiatan ini bertujuan untuk menganalisis dan mendokumentasikan berbagai aspek perawatan dan perbaikan mesin Diesel Cummins KTA 38 G5. Termasuk dalam analisis dan prosedur pemeliharaan yang diperlukan. Metode penelitian ini menggunakan kualitatif yaitu dengan menggunakan dua metode untuk menganalisis kerusakan pada engine diesel di unit power PPSDM Migas Cepu, yaitu metode langsung dan metode tidak langsung. Pemeliharaan mesin cummins KTA 38 G5 dibagi menjadi dua yaitu perawatan yang dilakukan secara harian dan juga pemeliharaan yang biasa dilakukan secara berkala yaitu 250 jam, minor overhoul 1200 jam, mayor overhoul 2400 jam. Setelah dilakukannya inspeksi ditemukan beberapa masalah serius yang bisa berdampak pada performa mesin diesel, diantaranya adalah temperatur pendingin diatas normal yang disebabkan oleh hose pecah dan terjadinya kerusakan pada Cam Shaft. Dalam penelitian ini ditemukan beberapa kerusakan diantaranya yaitu hose pendinginan pecah dan camshaft yang rusak. Perawatan rutin adalah kunci untuk memastikan mesin diesel Cummins KTA 38 G5 bekerja dengan efisien dan memiliki umur yang panjang, melalui kegiatan perawatan rutin, potensi kerusakan dapat dideteksi lebih awal sehingga mencegah kerusakan yang lebih serius.]]>
<![CDATA[SISTEM KENDALI TEKANAN UDARA SEKUNDER PADA FORCED DRAFT FAN DI PLTU PAITON ]]>
<![CDATA[Alfian Prasetyo Aji]]>;
<![CDATA[Ilham Arifin Pahlawan]]>
<![CDATA[ ENIGMA: Engineering in Green Machinery Vol. 2 No. 2 (2025): Desember ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Gresik ]]>
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DOI: 10.30587/enigma.v2i2.10921
<![CDATA[This research aims to assess the effectiveness of using Pressure Transmitters on the Force Draft Fan in a Steam Power Plant. The evaluation is conducted through a series of tests to measure air pressure and analyze the response of the Inlet damper position in regulating airflow. Data were collected through literature studies, direct field observations, and interviews with relevant practitioners. The measurement results show significant pressure variations. For a set point of 100 mmWG, the measured air pressure values range from 94.37 mmWG to 111.31 mmWG, and the percentage opening of the Inlet damper for FDF A & B varies between 58.28% to 63.07%. There are some measurement errors that need to be further evaluated, with error values ranging from -11.31 to 7,72 mmWG. Nevertheless, the system still operates within acceptable limits.]]>
<![CDATA[The EVALUASI DESAIN DAN KINERJA ALAT VACUUM TEST SEBAGAI METODE NON DESTRUCTIVE TESTING (NDT) PADA SAMBUNGAN LAS ]]>
<![CDATA[ALESSANDRO BRILLIANT]]>;
<![CDATA[Ilham Arifin Pahlawan]]>;
<![CDATA[Aufa Ulin Nuha]]>
<![CDATA[ ENIGMA: Engineering in Green Machinery Vol. 2 No. 2 (2025): Desember ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Gresik ]]>
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DOI: 10.30587/enigma.v2i2.10923
<![CDATA[This study focuses on the assembly and testing process of a Vacuum Test device as one of the Non-Destructive Testing (NDT) methods for detecting leakage in welded joints. The activities were conducted at PT. Kintomo Engineering Group, Gresik, with the objective of understanding the working principles, assembly procedures, and effectiveness of the Vacuum Test device in industrial applications. The methods applied included direct observation, participation in technical activities, and simulation analysis using Autodesk Inventor software. The test results indicate that the Vacuum Test device is capable of achieving vacuum pressures of 50–100 mbar and performs effectively in detecting defects such as porosity and micro-cracks in welded joints. Simulation results show a maximum stress of 0.613 MPa with a safety factor of 15, indicating that the device is structurally safe for repeated use. Based on these findings, the Vacuum Test method is proven to be an effective visual inspection tool for detecting leakage without causing damage to the material structure.]]>
<![CDATA[The ANALISIS PEMELIHARAAN DAN KINERJA BOGIE KERETA TB-398: STUDI KASUS DI DEPO PASARTURI ]]>
<![CDATA[Ahmad Dedy Agus Cahyono]]>;
<![CDATA[Ilham Arifin]]>
<![CDATA[ ENIGMA: Engineering in Green Machinery Vol. 2 No. 2 (2025): Desember ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Gresik ]]>
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DOI: 10.30587/enigma.v2i2.10926
<![CDATA[The bogie is a vital component in the train system that affects the comfort, stability, and safety of train operations. This paper discusses the technical specifications of the TB-398 train bogie and the maintenance strategies implemented at Pasarturi Depot to maintain the performance and safety of the train operations. Using the Failure Mode and Effect Analysis (FMEA) approach, this paper identifies critical components of the TB-398 bogie that require special attention in maintenance, such as wheel diameter, axle distance, and maximum axle load. Based on the FMEA analysis, maintenance priorities are determined for each component, focusing on preventive and predictive maintenance. The study shows that planned and periodic maintenance can reduce the risk of system failures and extend the operational lifespan of the TB-398 bogie. The findings provide valuable insights for train maintenance management to improve operational efficiency and safety at Pasarturi Depot.]]>
<![CDATA[The ANALISIS EFEKTIVITAS KINERJA MESIN GAS CUTTING OTOMATIS Di PT. ANEKA JASA TEKNIK GRESIK ]]>
<![CDATA[zidan zakhroni]]>;
<![CDATA[Alviani hesthi permata ningtyas]]>
<![CDATA[ ENIGMA: Engineering in Green Machinery Vol. 2 No. 2 (2025): Desember ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Gresik ]]>
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DOI: 10.30587/enigma.v2i2.10929
<![CDATA[The effectiveness of cutting machines plays a crucial role in improving productivity within manufacturing industries, particularly in steel plate cutting processes. This study aims to analyze the performance effectiveness of the HK-12 Automatic Gas Cutting Machine at PT Aneka Jasa Teknik Gresik using the Overall Equipment Effectiveness (OEE) method. The analysis focuses on three key parameters: Availability, Performance, and Quality, based on operational data collected during the internship period. The results indicate that the machine achieved an Availability value of 95.83%, demonstrating a high level of operational readiness with minimal downtime. However, the Performance value reached only 14.13%, showing that the cutting speed is significantly below the ideal operating speed. The Quality value was recorded at 86.67%, meaning that most cutting outputs met the required standards although some defects were still present. Based on these three components, the overall OEE value was calculated at just 11.73%, far below the industrial OEE benchmark of 85%. The low OEE result is primarily attributed to poor machine performance, influenced by suboptimal cutting speed, track conditions, and operator parameter settings. Overall, improvements in machine performance, regular maintenance, and operator training are needed to enhance the effectiveness of the HK-12 Automatic Gas Cutting Machine.]]>
<![CDATA[The ANALISIS KEANDALAN CONVEYOR BELT DI AREA NPK2 PT. X BERDASARKAN DATA KERUSAKAN DAN WAKTU OPERASI ]]>
<![CDATA[M.Zakarsyi Lilma Abid]]>;
<![CDATA[Alviani Hesthi Permata Ningtyas]]>;
<![CDATA[Ajeng Tri Rahayu]]>
<![CDATA[ ENIGMA: Engineering in Green Machinery Vol. 2 No. 2 (2025): Desember ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Gresik ]]>
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<![CDATA[Conveyor systems play an important role in supporting material handling processes in the fertilizer industry. Continuous operation under high workloads can lead to component wear, increased failure frequency, and downtime that disrupts production continuity. These conditions highlight the need for reliability evaluation to ensure optimal conveyor performance. This research analyzes the reliability of the conveyor system at NPK Plant 2 of PT. X using historical maintenance data collected from July 2024 to June 2025. The analysis was conducted using reliability parameters, including Mean Time Between Failure (MTBF), Mean Time To Repair (MTTR), Availability, Failure Rate, and Reliability. In addition, Failure Mode and Effect Analysis (FMEA) was applied to identify critical components and determine maintenance priorities based on the Risk Priority Number (RPN). The results indicate that most conveyor units exhibit high availability and reliability; however, several units still experience relatively high downtime and repair duration. The conveyor belt component shows the highest RPN value and therefore requires priority attention in maintenance activities. Implementing more effective preventive maintenance and enhanced monitoring of critical components is expected to reduce downtime and improve the reliability and operational efficiency of the conveyor system.]]>
<![CDATA[The ANALISIS SISTEM SINKRONISASI DAN DISTRIBUSI DAYA GENSET PADA PROYEK DKUT PK-19 JIIPE GRESIK: Universitas Muhammadiyah Gresik ]]>
<![CDATA[Mohammad Rizal Chasi Pratama]]>;
<![CDATA[Ilham Arifin pahlawan]]>
<![CDATA[ ENIGMA: Engineering in Green Machinery Vol. 2 No. 2 (2025): Desember ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Gresik ]]>
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DOI: 10.30587/enigma.v2i2.10970
<![CDATA[TThe DKUT PK-19 Infrastructure and Landscape Development Project at the JIIPE Gresik industrial area is a vital Bank Indonesia project requiring reliable and continuous power supply. To ensure energy availability, PT Jaya Teknik Indonesia (JTI) installed a backup power system consisting of two Mitsubishi generator units, MGS1500CL and MGS1300R L50. This study aims to analyze the synchronization and power distribution system between generators and their connection to the PLN grid. The research method includes field observation and operational parameter measurements, such as voltage, current, and frequency during testing, synchronization, and power distribution. Results indicate that synchronization between generators successfully maintains load balance with current differences below 5% across phases. The applied three-phase four-wire (3Φ-4W) distribution system effectively delivers power through the Main Distribution Panel (MDP) to subpanels throughout the project. The automatic synchronization system (auto-synchronizer) enhances fuel efficiency and voltage stability.]]>
<![CDATA[A ANALISA KINERJA LOW PRESSURE HEATER (LPH) BERBASIS STANDAR ASME PTC DI PLTU UP GRESIK ]]>
<![CDATA[Moch Afifur Rosikh]]>;
<![CDATA[Alviani Hesthi Permata Ningtyas]]>;
<![CDATA[Ajeng Tri Rahayu]]>
<![CDATA[ ENIGMA: Engineering in Green Machinery Vol. 2 No. 2 (2025): Desember ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Gresik ]]>
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DOI: 10.30587/enigma.v2i2.11002
<![CDATA[Steam Power Plants (PLTU) have an important role in providing reliable electrical energy for the community and industrial sector. One of the components that affect the thermal efficiency of the generating system is the Low Pressure Heater (LPH), which functions to heat feed water using heat from turbine extraction steam. This study was conducted at LPH 4 Unit 4 at PT PLN Nusantara Power UP Gresik with the aim of assessing the performance of the equipment based on the ASME PTC 12.1 standard, through the analysis of three main parameters, namely Terminal Temperature Difference (TTD), Drain Cooler Approach (DCA), and Temperature Rise (TR). The method used is quantitativedescriptive with operational data collection from July to August 2025. The results of the analysis show that the actual TTD value is much higher than the commissioning value, which indicates a decrease in the effectiveness of heat transfer. Meanwhile, the DCA and TR values are still close to the commissioning value so that the condensate heating and cooling process can be said to be running efficiently. The decline in performance in TTD is thought to be influenced by the age of the LPH, variations in operating loads, and suboptimal data collection patterns. These findings provide important input for PLTU managers in improving system reliability and efficiency through regular maintenance and optimizing performance monitoring methods.]]>
<![CDATA[The PROSES MANUFAKTUR ROLL GILINGAN TEBU MENGGUNAKAN METODE PENGECORAN LOGAM ]]>
<![CDATA[Pajar Agustian Akbar]]>;
<![CDATA[Rilo Chandra Muhamadin]]>
<![CDATA[ ENIGMA: Engineering in Green Machinery Vol. 2 No. 2 (2025): Desember ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Gresik ]]>
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DOI: 10.30587/enigma.v2i2.11067
<![CDATA[This study aims to analyze the manufacturing process of sugarcane mill rolls using the metal casting method at PT X. Sugarcane mill rolls are the main component in the sap extraction process so that material quality and dimensional accuracy greatly affect milling performance in sugar factories. The research method used is descriptive qualitative through direct observation of the production process, interviews with technicians, documentation, and analysis of the chemical composition of the material using spectrometric tests. The results show that the manufacturing process includes pattern making, sand mold making, metal melting, casting, natural cooling for 7–14 days, and machining processes consisting of facing, turning, boring, grooving, drilling, and finishing. The results of spectrometric tests on several samples indicate that the chemical composition of the material generally meets the FC 20 SP standard, although there are some values that are close to the tolerance limit. The machining process carried out with large-capacity machines and precision measuring instruments produces dimensions and surface quality of rolls that meet specifications, so that the resulting product is suitable for use in the sugar industry.]]>
