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Dedi Purwanto Indra Kusuma
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RESWARA: Jurnal Riset Ilmu Teknik
Published by Lembaga Penelitian dan Pendidikan (LPP) Kalibra
ISSN : -     EISSN : 30259444     DOI : https://doi.org/10.70716/reswara
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation
RESWARA: Jurnal Riset Ilmu Teknik is a leading scholarly platform that examines the strategic role of engineering disciplines in advancing the Sustainable Development Goals (SDGs). The journal is dedicated to publishing recent research, innovations, and engineering solutions that support sustainable development. The editorial board welcomes manuscripts based on theoretical frameworks and empirical research. The journal scope covers scientific knowledge and research-based information, including applied research and recent developments in engineering research and development. The primary focus includes Civil Engineering and Spatial Planning, Industrial Engineering, Electrical Engineering and Informatics, Earth Science Technology, and Naval Architecture. All manuscripts published in RESWARA undergo a double-blind peer review process. The final decision on manuscript acceptance rests with the Editorial Board, based on recommendations from independent peer reviewers.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 131 Documents
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Rancang Bangun Alat Pirolisis Tabung Bertingkat Pengolah Sampah Plastik menjadi BBM Alternatif (PITARA) Arif Surono; Wachid Yahya; Onery Andy Saputra; Muhammad Iwan
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.618

Abstract

Plastic waste is difficult to decompose and continues to create environmental pressure, while the need for alternative liquid fuels remains high. This study aimed to design and test PITARA, a multi-stage tube pyrolysis prototype for converting mixed plastic waste into liquid fuel. The method used an experimental engineering design through functional analysis, structural design, fabrication, functional testing, performance testing, and preliminary fuel-property testing. The unit consisted of a 10 kg stainless-steel reactor, a dual-fuel burner using LPG and charcoal, and a vertical double-pipe condenser. The feedstock consisted of mixed PP, PE, HDPE, and similar plastics processed into 2 x 3 mm pellets. From 10 kg of clean and dry plastic waste, the prototype produced 10.35 L of liquid condensate, equivalent to 8.221 kg or 82.21% by mass, about 2 g of solid residue, and an estimated 17.77% gaseous or non-condensable fraction by difference. Laboratory testing showed a density of 0.7944 g/cm³, viscosity of 0.257 cP, calorific value of 37.37 MJ/kg, and positive flammability. The novelty of this study lies in the integration of a dual-fuel burner, compact stainless-steel reactor, and vertical double-pipe condenser for small-scale mixed-plastic pyrolysis. The findings represent preliminary prototype validation; further GC-MS analysis, fuel-standard testing, emission testing, and engine performance evaluation are required.
CFD-DPM Numerical Investigation of Erosion-Corrosion in Elbow 180° Evaporator Tube HRSG: Effect of Weld Defect and Feedwater TDS on Flow-Accelerated Corrosion Ricky Rahmadani; Harus Laksana Guntur
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.619

Abstract

Heat Recovery Steam Generator (HRSG) evaporator tubes are susceptible to premature failure due to the combined effects of flow-accelerated corrosion (FAC) and erosion under high-temperature two-phase flow conditions. Understanding the interaction between hydrodynamic behavior, weld defects, and feedwater quality is essential for improving HRSG reliability. This study aims to investigate the effect of weld defects and feedwater total dissolved solids (TDS) on erosion-corrosion behavior in a 180° evaporator tube elbow of an HRSG system. A numerical case study was conducted using Computational Fluid Dynamics coupled with the Discrete Phase Model (CFD-DPM) implemented in ANSYS Fluent. Two tube configurations, namely a weld-defective tube and a defect-free tube, were simulated under actual operating conditions, while TDS concentration was represented by discrete solid particles. The results indicate that the 180° elbow geometry generates high turbulence and particle impingement, leading to localized erosion at the downstream outer curvature of the elbow. Under actual operating conditions with an average feedwater TDS of 1,873 ppm, the predicted erosion rate reached 1.83 mm/year in the weld-defective condition, compared with 0.55 mm/year in the defect-free condition, indicating more than a threefold increase in material degradation. Higher TDS levels further accelerated the erosion process. The predicted erosion hotspot corresponded closely with the actual leakage location observed in the field. These findings demonstrate that the synergistic interaction of FAC, particle-induced erosion, elevated TDS, and weld defects is the primary cause of repeated evaporator tube failures in the investigated HRSG system.
Analysis of Rainwater Harvesting's Potential for Clean Water Savings, Energy Efficiency and Carbon Emission Reduction at SDN Ragunan 08 Jakarta Hendry Patabang Bara; Hans Dermawan; Andri Rachmanto Wibowo
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.622

Abstract

The increasing demand for clean water in educational facilities has led to greater groundwater exploitation, resulting in higher energy consumption for pumping and increased carbon emissions. Rainwater Harvesting (RWH) offers an alternative water source that supports sustainable development and Net Zero Carbon initiatives. This study evaluates the technical, environmental, and economic feasibility of implementing an RWH system at SDN Ragunan 08 Jakarta to meet non-potable water demands, particularly for toilet flushing. The analysis included water demand estimation, rainfall projection using Tropical Rainfall Measuring Mission (TRMM) satellite data validated through statistical methods, assessment of energy savings and carbon emission reductions, and economic evaluation using the Life Cycle Cost (LCC) approach. The results showed that the school’s non-potable water demand was 9,492 liters/day (9.49 m³/day). Validation of TRMM data using logarithmic regression produced a very strong correlation (R = 0.998), indicating high reliability for rainfall estimation. With a reservoir capacity of 60 m³, the RWH system could reduce groundwater use by up to 56.7% during the driest month and fully meet water demand in several rainy months. Reduced groundwater pumping lowered annual carbon emissions from 2,904.55 kg CO₂ to 968.18 kg CO₂. Economically, the system requires an initial investment of IDR 74,741,413.97 and has a 10-year LCC of IDR 93,777,649.02. Although further optimization is needed to improve economic feasibility, the RWH system demonstrates strong potential as a sustainable water management strategy through groundwater conservation, energy savings, and carbon emission reduction.
Pengembangan Modul Pembelajaran Dasar Listrik dan Elektronika Berbasis PHET Simulation untuk Siswa Kelas X Teknik Instalasi Tenaga Listrik SMK Aditya Dwi Raja Kamansastra; Bagus Dwi Cahyono; Siswo Wardoyo
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.627

Abstract

This study aimed to develop a PhET Simulation-based learning module for Basic Electrical and Electronics and to evaluate its feasibility and implementation in supporting the learning process of tenth-grade students in the Electrical Power Installation Engineering program at SMKN 4 Kota Tangerang. The study was motivated by teacher-centered learning practices and the limited use of instructional media, which relied primarily on Microsoft PowerPoint, resulting in low student participation and learning outcomes below the Minimum Mastery Criteria (MMC) on electrical circuit topics. This research employed the Research and Development (R&D) method using the Lee and Owens development model, consisting of analysis, design, development, implementation, and evaluation stages. The research subjects included media experts, material experts, and 34 tenth-grade students. Data were collected through observations, interviews, questionnaires, and assessments of cognitive, affective, and psychomotor learning outcomes. During the implementation stage, students used the module integrated with PhET Simulation to design and test electrical circuits virtually. The findings indicated that the developed module achieved an excellent category based on expert validation and received positive responses from students. The module also enhanced students' participation, engagement, and understanding of electrical circuit concepts through interactive, contextual, and practice-oriented learning experiences. Therefore, the PhET Simulation-based learning module is feasible and effective as an instructional medium for Basic Electrical and Electronics learning in vocational high schools.
Comparative Analysis of Gas Turbine Compressor Efficiency Before and After DuraVee-to-DuraGT Final Filter Replacement at PT. Energi Listrik Batam Jhon Hericson Purba; Erik Manasse; Jihan Zeinyuta; Muhammad Veven
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.630

Abstract

Compressor performance is one of the primary factors influencing the thermal efficiency and power output of a gas turbine. The condition of the inlet air filtration system plays a crucial role in compressor performance, as it directly affects airflow resistance and inlet air conditions. This study aims to analyze and compare the compressor efficiency of Gas Turbine Unit 1 at PT Energi Listrik Batam before and after the replacement of the final filter from the DuraVee® XL98 type to the DuraGT™ V300F9 type. The operational data used in this study consist of historical unit data collected from several representative operating periods, including the period when the DuraVee® XL98 final filter was in service, the initial operating period of the DuraGT™ V300F9 filter, and the most recent operating condition after five years of using the new filter type. The analyzed parameters include compressor inlet air pressure and temperature, pressure ratio, gas turbine power output, and compressor efficiency. The analysis was conducted by comparing compressor efficiency values under each operating condition based on selected and processed actual plant operating data. The results indicate that replacing the final filter type from DuraVee® XL98 to DuraGT™ V300F9 improved gas turbine compressor efficiency by 0.53–1.10%, with an average increase of 0.75% across all load conditions.
The Performance Evaluation of a Horizontal Capstan in the Lori Pulling System at Bah Jambi Palm Oil Mill Lamlam Jeki Padang; Busrizal Faisal
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.642

Abstract

This study evaluated the performance of a horizontal capstan used in the lori pulling system at Bah Jambi Palm Oil Mill. The study focused on the operational relationship among gearbox pulley rotation, lubricant viscosity, gearbox/oil temperature, and lori pulling time as indicators of capstan effectiveness. Field observations were conducted from 11 to 25 May 2026 by measuring motor speed, pulley dimensions, wire rope diameter, shaft spacing, oil viscosity, gearbox/oil temperature, and lori pulling time. Gearbox pulley speed was calculated from the pulley ratio, while changes in viscosity, temperature, and pulling time were analyzed descriptively to assess the operating condition of the capstan system. The results showed that the gearbox pulley rotated at 13 rpm, indicating an effective speed reduction mechanism for generating the torque required to pull sterilizer lorries. During the observation period, oil viscosity decreased from 30.71 cSt to 21.63 cSt, equivalent to a reduction of 29.57%, while gearbox/oil temperature increased from 41.77°C to 45.47°C. Despite lubricant degradation, lori pulling time remained relatively stable within 137.33–143.67 s, indicating that the capstan continued to operate effectively. Overall, the horizontal capstan at Bah Jambi Palm Oil Mill remained operationally reliable during the study period, although the decline in lubricant condition suggests the need for periodic monitoring and maintenance to preserve long-term transmission performance.
Effect of Tapioca Binder Concentration on the Quality of Charcoal Briquettes Produced from Oil Palm Trunk and Laban Wood Hisyammudin Hisyammudin; Zakwan Zakwan; Heri Purwanto
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.644

Abstract

This study examined the effect of tapioca binder concentration on the quality of charcoal briquettes produced from oil palm trunk and laban wood. A non-factorial Completely Randomized Design was applied using five binder concentrations: V1 (10%), V2 (15%), V3 (20%), V4 (22.5%), and V5 (25%), with three replications. Moisture content, ash content, and calorific value were evaluated. One-way analysis of variance showed a highly significant treatment effect for every parameter (p < 0.001), and Duncan’s Multiple Range Test at the 5% level separated all treatment means. Increasing binder concentration raised moisture content from 4.131% to 6.175% and ash content from 3.263% to 4.900%, while calorific value decreased from 7,185.33 to 6,325.98 cal/g. All treatments met SNI 01-6235-2000. The best treatment was V1, consisting of 47.5% oil palm trunk charcoal, 47.5% laban wood charcoal, and 10% tapioca binder. The results demonstrate that controlling binder concentration is essential for balancing particle cohesion and thermal quality.
Analisis Faktor-Faktor yang Mempengaruhi Kinerja Pelabuhan Stagen dan Tarjun Ahmad Nurul Huda; Iphan Fitrian Radam
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.661

Abstract

Indonesia, as an archipelagic country, relies heavily on maritime transportation to support regional connectivity. The Stagen and Tarjun Ferry Ports play an important role in community mobility and logistics distribution in South Kalimantan. Improved access through Jalan Gubernur H. Sahbirin Noor has increased ferry users, but service quality and infrastructure have not improved accordingly. This study aims to analyze the factors affecting port performance using a quantitative approach with Structural Equation Modeling–Partial Least Squares (SEM-PLS). Data were collected through questionnaires distributed to port users. Of the 47 indicators evaluated, 11 reflective and 16 formative indicators met the SEM-PLS model criteria. The findings identified five factors influencing port performance: port facilities, ferry facilities, operational systems, operators, and supporting facilities. Operational systems and supporting facilities were the most influential factors, particularly regarding waiting time, waiting room comfort, parking capacity, and service schedule accuracy. Therefore, improving facilities and optimizing operational systems are the primary strategies for enhancing ferry port service quality.
Comparison of Content-Based Filtering and K-Nearest Neighbor in Genre-Based Movie Recommendations Irfan Nur Sofiyanto; Nurmalitasari Nurmalitasari; Rudi Susanto
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.670

Abstract

The rapid growth of digital movie platforms has increased the number of available movies, making it difficult for users to find films that match their preferences. This study aims to implement and compare Content-Based Filtering and K-Nearest Neighbor methods in a genre-based movie recommendation system. The data used in this study were obtained from the Full TMDB Movies Dataset from Kaggle, consisting of 1,422,047 initial records. The dataset was processed through several stages, including attribute selection, missing value handling, genre transformation, duplicate data removal, and feature weighting using TF-IDF, resulting in 796,425 movie records ready for modeling. Content-Based Filtering was implemented using cosine similarity to calculate the similarity between user genre preferences and movie features, while K-Nearest Neighbor was applied by identifying movies with the closest distance to the user preference vector. The results show that both methods were able to generate relevant movie recommendations based on the selected genres, namely Action, Adventure, and Science Fiction. Based on the evaluation results, both methods achieved the same accuracy of 99.92%. However, K-Nearest Neighbor showed slightly better performance, with a precision of 86.56%, recall of 80.32%, and F1-score of 83.32%, compared to Content-Based Filtering, which achieved a precision of 86.45%, recall of 79.58%, and F1-score of 82.87%. These findings indicate that K-Nearest Neighbor is slightly more effective in identifying relevant movie recommendations based on user genre preferences.
Analysis of the Effect of Biomass Fuel Feed Rate on the Performance of a 30 Ton h⁻¹ Water-Tube Boiler in a Palm Oil Mill Muhammad Fajar; Zulham Effendi
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.674

Abstract

Boilers are among the most important utility units in palm oil mills because they supply steam required for processing fresh fruit bunches. Boiler operating performance is strongly influenced by the biomass fuel feed rate, which directly affects heat generation, steam production, and thermal efficiency. This study aimed to determine the optimum biomass fuel feed rate for boiler operation and to evaluate its relationship with steam production in a 30 ton h⁻¹ water-tube boiler. A quantitative descriptive approach was employed using operational log sheet data, field observations, and laboratory analyses of biomass fuel characteristics. The observed parameters included fiber and palm kernel shell feed rates, fuel heating value, steam flow rate, steam pressure, steam temperature, feedwater temperature, and boiler thermal efficiency. Boiler efficiency was calculated using the direct method based on the energy balance between heat input and heat output. The results showed that increasing the biomass fuel feed rate increased both total heat input and steam production. Boiler thermal efficiency increased from 61.15% during the initial operating period to a maximum of 71.22% under optimum operating conditions. However, further increases in fuel feed rate did not improve boiler performance, as the efficiency decreased to 70.64%, indicating reduced combustion effectiveness and heat transfer efficiency. These findings demonstrate that proper regulation of biomass fuel feed rate is essential for maintaining stable steam production and achieving optimum thermal efficiency in palm oil mill boiler operations.

Page 11 of 14 | Total Record : 131

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