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All Journal AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi JURNAL ABDI MASYARAKAT INDONESIA (JAMIN) International Journal of Innovation in Mechanical Engineering and Advanced Materials International Journal of Applied Sciences and Smart Technologies
Sentot Novianto
Universitas Trisakti
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Development of an Arduino-Based Water Rocket Launcher in Physics Experiments Larasati Putri; Fakhrizal Arsi; Kiar Vansa Febrianti; Sentot Novianto; Ika Wahyu Utami; Muhammad Najih; Sofia Debi Puspa; Muhammad Gilang Ramadhan; Harry Munandar
International Journal of Applied Sciences and Smart Technologies Vol. 8 No. 1 (2026): Volume 08, Issue 1, June 2026
Publisher : Faculty of Science and Technology, Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/5qcv4a36

Abstract

The effective science education requires practical methods that allow students to explore complex physics concepts. One promising approach is the use of physics experiment as an interactive media. This research focuses on the development of water rocket launcher using an Arduino as an innovative physics experiment. Arduino in water rocket launcher is used for making the precise control and relevant measurement of variables, such as angle of projection, speed of launch, maximum altitude of launch, and air pressure. The research process followed the ADDIE instructional design model and involved hardware, software prototyping, work testing, and user instruction. The launcher’s performance was tested with 33 engineering students and assessed by 5 experts. Expert evaluations rated the relevance, design, and usability of the kit highly (3.4–4.0 on a 4-point Likert scale). User responses from 33 students indicated strong agreement on ease of use and engagement (mean scores 3.79–3.91), with a high reliability (Cronbach’s alpha = .964). Experimental launches, using three and four finned rockets, showed maximum height percentage differences between theoretical and observed values ranging from 0.0%–52.6% (three fins) and 1.2%–51.8% (four fins); range errors were 3.4%–36.8% (three fins) and 2.1%–42.7% (four fins). The findings confirm that the Arduino-based water rocket launcher provides effective, interactive learning, though further refinement in data accuracy and instructional materials is recommended to maximize its classroom impact and is needed for improved accuracy.
Performance Evaluation of a Condenser at a Combined Cycle Power Plant Using the LMTD Method Putut Jaya Swardhamana; Nanang Ruhyat; Sentot Novianto
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.
Performance Evaluation of Ammonia Refrigeration Systems in a Texturizing Plant Abdul Cholik; Nanang Ruhyat; Sentot Novianto
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.
Design and Analysis of a Vertical Axis Ocean Current Turbine Tunnel Using SolidWorks Computational Fluid Dynamics Hardi Gunawan; Nanang Ruhyat; Sentot Novianto
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.
Pelatihan Rancang Bangun Roket Air Berbasis Arduino dari Barang Bekas Sebagai Media Edukatif Fisika Larasati Rizky Putri; Kiar Vansa Febrianti; Sentot Novianto; Ika Wahyu Utami; Bambang Cholis Su’udi; Muhammad Doris; Amrullah Gilang Ibrahim; Ahmad Roqy Mustafidan; Jeevan Kristori
Aksiologiya: Jurnal Pengabdian Kepada Masyarakat Vol 10 No 3 (2026): Agustus
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/aks.v10i3.27376

Abstract

Tim Dosen Laboratorium Fisika, Fakultas Teknologi Industri Universitas Trisakti mengadakan kegiatan Pengabdian kepada Masyarakat (PkM) pada Kamis, 30 Mei 2024, bertempat di Musyawarah Guru Mata Pelajaran (MGMP) IPA Kota Tangerang. Pelatihan ini bertujuan meningkatkan kompetensi guru SMP dalam merancang, membangun, dan menggunakan roket air berbasis Arduino sebagai media edukatif Fisika. Kegiatan disajikan melalui pelatihan dan demonstrasi yang mencakup prinsip kerja roket air dengan memanfaatkan Hukum Newton, Momentum, dan Tekanan. Penggabungan Arduino memungkinkan roket air dikendalikan secara otomatis sekaligus memperkenalkan pemrograman dasar. Melalui pemanfaatan barang bekas, pelatihan ini mendukung keberlanjutan lingkungan dan menawarkan solusi pembelajaran yang ekonomis. Hasil pelatihan menunjukkan mayoritas guru mampu memahami penggunaan Arduino dalam pembelajaran Fisika dan mengaitkannya dengan materi relevan. Alat peraga ini dinilai mampu meningkatkan keterlibatan serta pemahaman konsep ilmiah peserta didik secara mendalam. Guru-guru peserta juga menunjukkan motivasi tinggi untuk mengadopsi alat peraga tersebut dalam praktikum di sekolah masing-masing.
Inovasi Hijau: Daur Ulang Limbah Minyak Jelantah Menjadi Sabun Cair Organik di Lingkungan Pesantren Larasati Rizky Putri; Sentot Novianto; Supriyadi; Ika Wahyu Utami; Sally Cahyati; Sofia Debi Puspa; Harry Munandar; Kiyoshi Irisawa; Daniel
Aksiologiya: Jurnal Pengabdian Kepada Masyarakat Vol 10 No 3 (2026): Agustus
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/aks.v10i3.28578

Abstract

Pengelolaan minyak jelantah di lingkungan pesantren masih menjadi tantangan, karena sebagian besar limbah tersebut dibuang langsung ke saluran air dan berpotensi mencemari lingkungan. Kegiatan Pengabdian kepada Masyarakat (PkM) ini bertujuan meningkatkan pengetahuan dan keterampilan santri serta pengelola Pesantren Daarul ’Uluum Lido Bogor dalam mendaur ulang minyak jelantah menjadi sabun cair organik yang ramah lingkungan dan bernilai ekonomi. Metode pelaksanaan dengan pendekatan partisipatif, meliputi sosialisasi, demonstrasi, serta praktik langsung pembuatan sabun cair organik. Evaluasi dilakukan melalui pre-test dan post-test untuk mengukur peningkatan pemahaman peserta, serta penyebaran kuesioner kepuasan. Hasil menunjukkan peningkatan signifikan pada nilai rata-rata post-test peserta, disertai partisipasi aktif dalam sesi praktik dan diskusi. Berdasarkan instrumen kuesioner evaluasi, 100% peserta sangat setuju bahwa kegiatan ini menambah pengetahuan tentang daur ulang minyak jelantah, 97% sangat setuju bahwa metode penyampaian menarik dan interaktif, serta 90% sangat setuju merasa termotivasi untuk menerapkan pengetahuan tersebut di lingkungan pesantren. Kegiatan ini terbukti efektif dalam meningkatkan kesadaran dan kemampuan peserta untuk mengolah limbah minyak jelantah menjadi produk bernilai guna. Secara keseluruhan, program ini berkontribusi dalam membangun budaya inovasi hijau dan dapat menjadi model pengembangan green pesantren yang mandiri dan berwawasan lingkungan.
Co-Authors Abdul Cholik Abigunto Amoro Adji Adinegoro, Faisal Ahmad Roqy Mustafidan Amrullah Gilang Ibrahim Amrullah Ibrahim Bambang Cholis Su’udi Chairul Rizki Daniel Engelin Shintadewi Julian Fakhrizal Arsi Hardi Gunawan Harry Munandar I Putu Budi Dharma Ika Wahyu Utami Indra Surjati Jeevan Kristori Kiar Vansa Febrianti Kiar Vansa Febrianti Kiki Prawiroredjo Kiyoshi Irisawa Larasati Putri Larasati Rizky Putri Lydia Sari M. Alfian Gibran Muhammad Doris Muhammad Faishal Ammar Muhammad Gilang Ramadhan Muhammad Hasan Muhammad Najih Nanang Ruhiyat Nanang Ruhyat Putut Jaya Swardhamana Rizka Shafira Sally Cahyati Sayid Fadhil Sofia Debi Puspa Supriyadi Supriyadi Supriyadi Syah Alam Tono Sukarnoto Tri swasono adi Yogatama Wishnu Pandu Prayudha