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All Journal SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Sinergi Jurnal Teknik Mesin Warta Ardhia : Jurnal Perhubungan Udara Jurnal Kelautan Nasional Food Science and Technology Journal (Foodscitech) G-Tech : Jurnal Teknologi Terapan International Journal of Advanced Technology in Mechanical, Mechatronics and Material (IJATEC) JTAM ROTARY International Journal of Community Service Journal of Integrated and Advanced Engineering (JIAE) Jurnal Pengabdian Masyarakat : Pemberdayaan, Inovasi dan Perubahan Jurnal Teknik Mesin Mechanical Xplore International Journal of Innovation in Mechanical Engineering and Advanced Materials J-ENSITEC (Journal of Engineering and Sustainable Technology) JCSE: Journal of Community Service and Empowerment Jipmas : Journal Inovasi Pengabdian Masyarakat
Nanang Ruhyat
Universitas Mercu Buana
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Pelet dari Sampah organik: Misi Hijau di Kolam Lele Wedhasari, Tyas; Ruhyat, Nanang
Jurnal Pengabdian Masyarakat: Pemberdayaan, Inovasi dan Perubahan Vol 5, No 1 (2025): JPM: Pemberdayaan, Inovasi dan Perubahan
Publisher : Penerbit Widina, Widina Media Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59818/jpm.v5i1.1050

Abstract

The management of household organic waste can be an innovative solution to reduce waste while creating valuable products, such as fish feed for catfish. Organic waste, which has long been one of the main contributors to household waste, can be optimally utilized to provide ecological and economic benefits. This community service initiative aims to process organic waste, such as vegetable scraps, fruit peels, and food residues, into eco-friendly catfish feed. The processing begins with the collection of fresh waste, sorting, and cleaning to ensure the quality of materials free from contamination. The waste is then fermented using probiotics, such as Lactobacillus, chosen for their ability to enhance nutritional value, accelerate decomposition, and reduce unpleasant odors. Once fermentation is complete, the materials are dried, ground into powder, and formulated with additional ingredients such as rice bran, fish meal, or eggs to meet the nutritional needs of catfish. The dry pellet is proven to be not only cheaper than commercial feed but also effective in supporting optimal fish growth. Additionally, this approach provides ecological benefits by reducing the volume of organic waste ending up in landfills, thus helping to mitigate methane emissions and other negative environmental impacts. This method offers a practical, sustainable, and circular-economy-based solution for household organic waste management while supporting more eco-friendly catfish farming.ABSTRAKPengelolaan sampah organik rumah tangga dapat menjadi solusi inovatif untuk mengurangi limbah sekaligus menciptakan produk bernilai guna, seperti pakan ikan lele. Sampah organik, yang selama ini menjadi salah satu penyumbang utama limbah rumah tangga, dapat dimanfaatkan secara optimal untuk memberikan manfaat ekologis dan ekonomi. Pengabdian ini bertujuan untuk mengolah limbah organik, seperti sisa sayuran, kulit buah, dan ampas makanan, menjadi pakan lele yang ramah lingkungan. Proses pengolahan diawali dengan pengumpulan limbah segar, pemilahan, dan pembersihan untuk memastikan kualitas bahan yang bebas dari kontaminasi. Limbah kemudian difermentasi menggunakan probiotik, seperti Lactobacillus, yang dipilih karena kemampuannya meningkatkan nilai gizi, mempercepat proses dekomposisi, dan mengurangi bau tidak sedap. Setelah proses fermentasi selesai, bahan dikeringkan, digiling menjadi tepung, dan diformulasikan dengan bahan tambahan seperti dedak, tepung ikan, atau telur untuk memenuhi kebutuhan nutrisi ikan lele. Produk akhir berupa pelet kering ini terbukti tidak hanya lebih murah dibandingkan dengan pakan komersial juga mendukung pertumbuhan ikan secara optimal. Selain itu, pendekatan ini memberikan manfaat ekologis dengan mengurangi volume limbah organik yang berakhir di tempat pembuangan akhir (TPA). Pendekatan ini menawarkan solusi praktis, berkelanjutan, dan berbasis ekonomi sirkular dalam pengelolaan sampah rumah tangga, sekaligus mendukung budidaya ikan lele yang lebih ramah lingkungan.
Pelatihan Komprehensif Desain Mesin Berbasis Teori Wedhasari, Tyas; Ruhyat, Nanang; Multahada, Erna
Jurnal Pengabdian Masyarakat: Pemberdayaan, Inovasi dan Perubahan Vol 5, No 5 (2025): JPM: Pemberdayaan, Inovasi dan Perubahan
Publisher : Penerbit Widina, Widina Media Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59818/jpm.v5i5.1957

Abstract

ABSTRACTThis community service activity aimed to enhance the capacity of micro, small, and medium enterprise partners in the manufacturing sector through theoretical-based machine design training. This training is distinctive because, in addition to mechanics and design theory, the material also covers production management and digital marketing concepts, providing participants with a comprehensive perspective on operational processes and business strategies. The implementation method involved a series of training modules covering fundamental machine design principles using mechanics and materials, Computer-Aided Design software utilization, production management, and digital marketing. The training was conducted in Malaysia with active participation from partner participants, students, and lecturers. The activity results demonstrated a significant improvement in participants' theoretical understanding and practical skills in machine design, modern technology application, as well as production management and marketing. Initial evaluation through surveys and feedback indicated that the capacity building targets were successfully achieved. In conclusion, this activity provided a tangible contribution to improving the human resources quality of the partners, potentially enhancing their business competitiveness in the market.ABSTRAKKegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kapasitas mitra, yaitu pelaku usaha kecil dan menengah di sektor manufaktur, melalui pelatihan pembuatan desain mesin dengan pendekatan teoretis. Pelatihan ini berbeda karena tidak hanya teori mekanika dan desain, materi juga mencakup konsep manajemen produksi dan pemasaran digital, memberikan peserta perspektif menyeluruh tentang proses operasional dan strategi bisnis. Metode pelaksanaan meliputi serangkaian tahapan pelatihan desain mesin menggunakan prinsip dasar mekanika dan material, pemanfaatan perangkat lunak Computer-Aided Design, manajemen produksi, serta pemasaran digital. Pelatihan dilaksanakan di Malaysia dengan melibatkan peserta mitra, mahasiswa, dan dosen. Hasil kegiatan menunjukkan peningkatan pemahaman teoretis dan keterampilan praktis peserta dalam desain mesin, penggunaan teknologi modern, serta manajemen produksi dan pemasaran. Evaluasi awal melalui survei dan umpan balik menunjukkan tercapainya target peningkatan kapasitas. Simpulan kegiatan ini memberikan kontribusi nyata terhadap peningkatan kualitas sumber daya manusia mitra, yang berpotensi meningkatkan daya saing usaha mereka di pasar.
Technical Evaluation of Elevator Performance and Capacity Planning in High-Rise Apartment Towers: A Case Study in Jakarta Kamandanu, Ikhsan; Ruhyat, Nanang
Jurnal Teknik Mesin Mechanical Xplore Vol. 6 No. 1 (2025): Jurnal Teknik Mesin Mechanical Xplore (JTMMX)
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/jtmmx.v6i1.10413

Abstract

Elevator systems are critical for ensuring efficient vertical mobility, safety, and occupant comfort in high-rise residential buildings. This study presents a comprehensive performance evaluation of the elevator system in a three-tower apartment complex in Jakarta, Indonesia. The analysis integrates both qualitative and quantitative methods to assess key performance indicators, including peak load demand, round-trip time, handling capacity, recommended number of elevator units, waiting time, and estimated daily energy consumption. The peak load during the initial five-minute interval was found to range from 23 to 48 persons per tower. Elevator speeds were set at 180 m/min for Tower 1 and 150 m/min for Towers 2 and 3, resulting in round-trip time values between 183 and 208 seconds. The estimated handling capacities varied from 54 to 69 persons per elevator. To ensure optimal service performance and redundancy, four elevator units are recommended for Tower 1, and three units each for Towers 2 and 3. The projected daily energy consumption, based on a five-hour operational window, ranges from 80.51 to 96.61 kWh. The findings offer practical insights for designing energy-efficient and service-optimized elevator systems in high-density urban residential developments.
Performance Evaluation of Ammonia Refrigeration Systems in a Texturizing Plant Cholik, Abdul; Ruhyat, Nanang; Novianto, Sentot
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 6, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i3.27476

Abstract

This study evaluates the performance of an ammonia refrigeration system used as a cooling medium in a texturizing plant. The analysis was conducted over a 10-day period, focusing on key performance indicators such as compressor work, condenser exhaust heat, refrigeration effect, mass flow rate, Coefficient of Performance (COP), and overall system efficiency. The data revealed that the system performed optimally on Day 5, achieving a peak efficiency of 91%, with compressor work at 304.1 kJ/kg and condenser exhaust heat at 1414.6 kJ/kg. In contrast, the lowest efficiency was recorded on Day 3, at 77%. The refrigeration effect reached its highest value of 491.3 kJ/kg on Day 3, highlighting efficient heat absorption despite lower overall system efficiency. On Day 4, the mass flow rate was 0.001049929 kg/s, with an actual COP of 1.39, while the ideal COP peaked on Day 10 at 1.69, reflecting the system’s theoretical maximum efficiency under optimal conditions. The study emphasizes the critical role of the condenser in the system’s performance. Optimizing the condenser’s operation by controlling temperature, pressure, and flow rates, alongside regular maintenance, significantly impacts system efficiency. The findings suggest that careful monitoring of operational parameters, including compressor work and refrigerant flow, can enhance the overall efficiency and reliability of ammonia refrigeration systems in industrial settings. This research provides practical insights into improving the cooling performance, reducing energy consumption, and ensuring consistent production quality in texturizing plants.
COMPARISON OF THE DRYER AIR INLET POSITION ON THE SPRAY DRYER WITH A DOUBLE CONDENSER TO PRODUCE A ROTATING FLOW THROUGHOUT THE DRYING CHAMBER: CFD ANALYSIS Ruhyat, Nanang
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 5, No 1 (2023)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v5i1.21605

Abstract

Simulation of the drying air and the spray of liquid in the spray dryer chamber with Discrete Phase Material (DPM) and Discrete Random Walk (DRW) was presented in this study using CFD methods to analyze the drying liquid. The main problem in spray drying is the adhesion of the material to the drying chamber walls, which causes uneven drying material. This adhesion can slow down the drying process and reduce productivity. The design of the drying air inlet into the drying chamber becomes essential to research. Variations in the position of the drying air inlet into the drying chamber are carried out in the 3D spray dryer room to see the mechanism of the centrifugal velocity of the drying airflow, which can improve uniform mixing with flow resistance due to friction with small walls and the drying air velocity. This phenomenon is impossible to observe in experiments. A geometric model consisting of 1,054,000 hexa-mesh elements at the area around the nozzle, the top spot of the chamber and the remaining area covered with a tetrahedral mesh, was determined to predict velocity, temperature, and fluid flow behavior. The first position, the dryer air inlet, is at an angle from the diameter of the spray drying chamber. The second position is in the middle of the diameter of the drying chamber. The position of the first inlet produces a more even temperature contour with a more tangential velocity due to the small frictional resistance with the walls. At the same time, the second position is not recommended because the flow leads to one side of the wall and creates sticking and even material buildup. A double-heated condenser can dry air at moderate temperatures, and it is a very effective drying product— positioning the dryer air inlet into the drying chamber, achieving the economical production of high-quality products.
Performance Evaluation of a Condenser at a Combined Cycle Power Plant Using the LMTD Method Swardhamana, Putut Jaya; Ruhyat, Nanang; Novianto, Sentot
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 6, No 2 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i2.27450

Abstract

This study evaluates the performance of the condenser at the Cilegon Combined Cycle Power Plant (CCPP) using the Logarithmic Mean Temperature Difference (LMTD) method to measure the heat transfer rate. Routine maintenance carried out on the condenser in the form of cleaning the condenser water box and condenser tube from garbage and crust on the condenser tube wall. Currently, condenser maintenance follows a routine schedule that is tied to steam turbine maintenance, without taking actual condenser performance into account. This can lead to inefficiencies and unnecessary downtime. The goal of this research is to assess the heat transfer rate of the condenser before and after maintenance to judge its effectiveness. Data on temperature changes were gathered in June 2023, before maintenance, and again in July 2023, after an overhaul. The analysis shows that the heat transfer rate increased from 51,362,294.48 kcal/h to 127,246,219.7 kcal/h, while the LMTD value rose from 0.76°C to 1.86°C. Based on these results, the study suggests a new approach to maintenance that focuses on performance. Specifically, maintenance should be done when the heat transfer rate drops below 110,000,000 kcal/h. This approach will help ensure the condenser works at its best, improve the plant's overall efficiency, and prevent the need for unnecessary maintenance. By aligning maintenance with performance data, the plant can boost output while lowering costs and downtime.
Design and Analysis of a Vertical Axis Ocean Current Turbine Tunnel Using SolidWorks Computational Fluid Dynamics Gunawan, Hardi; Ruhyat, Nanang; Novianto, Sentot
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 6, No 1 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i1.27652

Abstract

The development of renewable energy in the marine power generation sector presents a promising approach to producing electrical energy in a sustainable and environmentally friendly manner. Indonesia, with its vast oceanic territory, holds significant potential for harnessing marine energy. However, the relatively slow speed of ocean currents in the region, typically ranging from 0.1 m/s to 1.5 m/s, poses a challenge to the efficiency of marine power generation. To overcome this limitation, this research focuses on the design and analysis of a vertical-axis ocean current turbine tunnel aimed at increasing the speed of ocean currents, thereby enhancing the overall efficiency of energy production. The study combines a thorough literature review with experimental research methods, utilizing SolidWorks Computational Fluid Dynamics (CFD) software to simulate the tunnel's impact on ocean current velocity. The simulations reveal that the tunnel construction significantly boosts current speeds, increasing them from 1.0 m/s to 1.7 m/s, and from 1.5 m/s to 2.6 m/s. This increase in velocity directly translates to higher kinetic energy available for conversion into electrical power by the turbine. Moreover, the study shows that the tunnel construction contributes to a more uniform flow of ocean currents, as evidenced by the Reynolds numbers obtained—100.250 at a current speed of 1.0 m/s and 150.375 at 1.5 m/s. These values, being below 2000, indicate laminar flow conditions within the tunnel, which are beneficial for optimizing turbine performance by reducing turbulence and ensuring a stable energy output. The findings underscore the effectiveness of the tunnel design in improving the efficiency of vertical-axis ocean current turbines, making it a viable solution for enhancing renewable energy production in regions with low ocean current speeds.
Sosialisasi K3 : Pentingnya Pemahaman Titik Temu yang Aman Saat Bencana Sari, Wedha; Ruhyat, Nanang
Jurnal Inovasi Pengabdian Masyarakat Vol 1 No 2 (2024): JIPMAS : Journal Inovasi Pengabdian Masyarakat
Publisher : PT. Karya Inovatif Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65255/jipmas.v1i2.46

Abstract

Community service aims to increase understanding of safety and health (K3) related to fire, especially in establishing a safe meeting point when a disaster occurs. Through well-conducted outreach, participants are given knowledge about preventive measures, emergency measures, and the importance of having an organized evacuation plan in the face of fire. Interactive and participatory counseling methods are used to invite participants to be actively involved in learning, including emergency evacuation simulations. Before the socialization, participants filled out a questionnaire to measure their understanding and attitudes regarding fire K3. The results of the questionnaire are the basis for an initial evaluation to determine the level of knowledge and awareness of participants before socialization is carried out. After socialization, participants were also asked to fill out the same questionnaire to evaluate changes in their understanding, attitude and readiness towards fire. The evaluation results showed a significant increase in participants' understanding of preventive measures and emergency actions when a fire occurs. In addition, participants also showed an increase in their mental and physical readiness in dealing with emergency situations. This evaluation provides an indication that K3 socialization has had a positive impact on participants in increasing their awareness and preparedness for fires. As a further step, it is necessary to carry out regular monitoring and evaluation to ensure the continuity of the understanding and attitudes that have been improved by participants. Collaboration with related parties such as the fire department and related agencies can also strengthen efforts to improve community safety against fire disasters in residential areas.
Co-Authors Agung Pramu Aji Agung Pramu Aji, Agung Pramu Ahmad Afif Alexander, Baimy Antonius Angga Andriawan Ayu Arwati, I G. Cholik, Abdul Dafit Feriyanto Desti Dorion, L. B. Dewi Murniati Dwiyoga Nugroho Engkos A. Kosasih, Engkos A. Erna Multahada Faizal Fajar Anggara Fajar Yudi Prabowo Firdianto, Ade Firman Maulana Fitri , Muhammad Ginting, Dianta Hadi Pranoto Hardi Gunawan Haris Ilman Fiqih Haris Ilman Fiqih Hariyanto Triwibowo Hilmy Nurfuad Indradewa, Rhian Jessi Ray Mardhatilla Kamandanu, Ikhsan L. B. Desti Dorion martolis tolis jasani Michael Kirkland Ngala Mohammad Ihsan Muhammad, Firhan Adji Noviyanto, Alvian Nurato , Nurato Putra, Jouvan Chandra Pratama Rifai, Moh Sahal Romahadi, Dedik Sagir Alva Sari, Wedha Sentot Novianto, Sentot Sirait, Alfa Firdaus Surachman, Arief Swardhamana, Putut Jaya Syukur Pribadi Tyas Wedhasari, Tyas Utama, Tri Yoga Wahyudi Rahmat