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INDONESIA
TEKNIK
Published by Universitas Diponegoro
ISSN : 08521697     EISSN : 24609919     DOI : -
Core Subject : Engineering,
Engineering
Journal yang mempublikasikan artikel-artikel ilmiah dari berbagai disiplin ilmu rekayasa/keteknikan. Artikel-artikel yang dipublikasikan di Jurnal TEKNIK meliputi hasil-hasil penelitian ilmiah asli (prioritas utama), artikel ulasan ilmiah yang bersifat baru (tidak prioritas), atau komentar atau kritik terhadap tulisan ilmiah yang dipublikasikan oleh Jurnal TEKNIK.
Arjuna Subject : -
Articles 10 Documents
 1 
Search results for , issue "Vol 46, No 1 (2025) January 2025" : 10 Documents clear
Comparison of Rainfall -Runoff Models with F.J. Mock and NRECA to Determine Water Availability of Rukoh Reservoir, Aceh Hidayat, Maulana; Nugroho, Hari
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67951

Abstract

Rukoh Reservoir is located in the upper part of Krueng (Kr.) Rukoh River Watershed, Pidie Regency, Aceh Province with a catchment area of 19.63 Km2. This reservoir has a storage capacity of 124.42 million m3 and is used for irrigation, drinking water and hydropower. The condition of Kr. Rukoh there is no discharge recording device, so to obtain discharge data it is necessary to convert rainfall data into discharge in the form of Rainfall-Runoff Model.  The purpose of this research is to calculate the amount of flow discharge and the suitability of the two rainfall-runoff models using the F.J. Mock method and NRECA method with observed discharge. Furthermore, determining the amount of reliable discharge as inflow availability of Rukoh reservoir. This research begins with the collection of rainfall data, evapotranspiration and condition parameters of the Rukoh Reservoir catchment area. The parameters in both models are optimized to obtain the optimal model discharge that is close to the observed  discharge data (Qobs). The results of the model suitability test showed that the NRECA model discharge is better compared to the F.J. Mock discharge model, the NSE test value = 0.64 and the correlation test value R = 0.83. Based on the selected discharge model, the calculation obtained the average flow discharge as Rukoh reservoir inflow of 1.13 m3 / sec and 80% water availability of Rukoh Reservoir by 0.58 m3/sec and 90% water availability obtained at 0.43 m3/sec.
Simulation Analysis of Base Year Operation Pattern Method of Marangkayu Reservoir East Kalimantan Province Sihite, Gonzales; Nugroho, Hari
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67652

Abstract

Marangkayu is a multi-purpose dam that serves irrigation water needs for a functional area of 1,500 hectares and provides raw water supplementation of approximately 450 liter per second. One of the requirements for impounding certification involves the preparation of an operational guideline for the dam. Therefore, this study aims to analyze the reservoir operation pattern by simulating water availability and demand. The reservoir operation pattern is determined through simulations based on calculations of water inflow, water demand, and losses, constrained by the reservoir's storage capacity. The simulation calculations employ the baseline year method, which includes dry years, normal years, and wet years. Reservoir water availability simulations are conducted under three conditions: dry year (probability of being equaled or exceeded 65%), normal year (probability of being equaled or exceeded 50%), and wet year (probability of being equaled or exceeded 35%). The results of this study indicate that the simulation of Marangkayu reservoir's operation pattern for dry, normal, and wet conditions can sufficiently meet the water needs for a functional irrigation area of 1,500 hectares with a cropping pattern of rice–rice–secondary crops, raw water demand of 450 liter per second, and river maintenance flow of 0.848 m³/second.
Life Cycle Assessment and Emission Mass Balance of Cassava-Based Bioethanol: A Feasibility Analysis of Environmental Impacts from Upstream to Downstream in Indonesia Fatimah, Nur Ayu; Hakeki, Alliqa Zafira; Sucahyo, Lilis
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67533

Abstract

Bioethanol is a promising alternative biofuel for reducing gasoline consumption. Indonesia's bioethanol industry is expanding to achieve the energy mix target through Pertamax Green 95. The government also focuses on energy transition and environmental concerns, especially in the transportation sector. This research aims to inventory and assess the impacts of bioethanol production from cassava in Indonesia and analyze the feasibility of bioethanol consumption in vehicle exhaust emissions. The research method utilizes Life Cycle Assessment (LCA) and emission mass balance as the essential analytical tools. The LCA analysis refers to SNI ISO 14040:2016 and SNI ISO 14044:2017, with a cradle-to-gate scope using ReCiPe 2016 Midpoint (H) to assess the potential environmental impact of Global Warming Potential (GWP), Stratospheric Ozone Depletion (SOD) and Terrestrial Acidification (TAC). Whereas vehicle emission feasibility is analyzed using the emission mass balance method to calculate emission concentrations. The research result shows the environmental impacts per liter of bioethanol production from cassava were GWP 11.88 kg CO2 eq, SOD 5.9x10-6 kg CFC11 eq, and TAC 0.04 kg SO2 eq. Emission feasibility analysis signifies that bioethanol combustion vehicles are lower than conventional gasoline. Therefore, it indicates energy and environmental added value through its life cycle.
BENOSIN: Bread Waste Bioethanol Conversion Unit as an Innovation in Bioethanol Production Using Apple Peels to Achieve a Sustainable Green Economy Sulistyo, Khansa Praningdita; Salbina, Firda Cahya; Rahma, Azelia Anisa
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67676

Abstract

Currently, fuel oil is a primary natural resource in the transport sector. However, the availability of fossil fuels is shrinking while the demand for fuel is rising. Expired bread is not worthy of consumption and is often discarded without being used as something more economical and environmentally friendly.   Therefore, the study aims to convert bread waste into bioethanol (C2H5OH) as a gasoline mixture that can reduce emissions of pollutants such as carbon monoxide (CO) and potentially improve air quality. These bioethanol products will create energy security, reducing dependence on a single energy source.   Bread waste serves as a substrate with an apple peel catalyst. This method of making bioethanol is through fermentation assisted by Saccharomyces cerevisiae with the addition of urea fertilizer as a nutrient. The multistage distillation column is equipped with hydrophobic material to help the separation process. The results of this study show that bioethanol from expired bread waste is worthy of being used as a gasoline mixture for motor vehicle fuel. The ethanol produced is directly proportional to the amount of bread waste, but there is still a maximum limit. The time variations used are 24 hours, 48 hours, and 72 hours.   Based on this study, the optimal condition of Saccharomyces cerevisiae works at a temperature range of 30-35°C with a pH of 4-6.
Analysis of The Potential and Challenges of Developing Bagasse as Bioethanol Fuel Jovanka, Hanabell; Anindita, Fransisca Chiara
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67662

Abstract

Bioethanol is an alternative energy source to fossil fuels derived from plant materials containing cellulose, such as sugarcane bagasse. According to data from the Ministry of Energy and Mineral Resources of the Republic of Indonesia, fuel consumption in Indonesia reached 29.68 million kiloliters in 2022. Transportation contributes the largest share of emissions at 80%. This study will review the potential and challenges of increasing bioethanol use as a 15% blend in non-diesel fuels by 2025. The research utilizes secondary data to produce solutions addressing these issues, concluding the overall analysis. The use of sugarcane bagasse as a bioethanol feedstock offers several advantages over traditional fuels, including (1) reducing carbon monoxide emissions by 19-25%, (2) lowering fuel costs, and (3) increasing octane value. Despite these benefits, bioethanol utilization faces challenges such as (1) the need for further research, (2) the requirement for advanced and expensive technology, and (3) raw material availability. Presidential Instruction No. 1/2006 emphasizes the need for biofuels, making this review essential. The study identifies steps to maximize the potential of bioethanol in reducing emissions and minimizing challenges.
IoT and Machine Learning-Based Electric Vehicle Development Strategy to Maximize Vehicle Life and Promote Green Mobility Candraningtyas, Callista Fabiola; Maulana, Fikri Arkan; Achmad, Alles Anandhita
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67383

Abstract

This research explores innovative strategies for developing electric vehicles based on the Internet of Things (IoT) and Machine Learning with the aim of maximizing service life and encouraging green mobility. In the face of the climate crisis and the increasing need for sustainable energy, electric vehicles offer a potential solution to reduce carbon emissions in the transportation sector. However, the challenges of optimizing battery life and energy efficiency require new, smarter and more connected approaches. This research integrates IoT technology with machine learning to create a more efficient electric vehicle ecosystem. This technology enables extended battery life through better usage management, increased energy efficiency through operational optimization, and predictive maintenance that reduces vehicle downtime. The research methodology includes testing prototypes of electric vehicles equipped with IoT technology, field trials to collect performance data, comprehensive analysis, and data processing to evaluate the effectiveness of the implemented strategies. The research results show that the integration of IoT and Machine Learning in electric vehicles can significantly increase battery life, energy efficiency, and make a positive contribution to green mobility. This development strategy is expected to advance electric vehicle technology in Indonesia, reduce dependence on fossil fuels, and create a cleaner and more sustainable environment.
Economic and Performance Analysis of Bioethanol Production from Aren and Palm Biomass Using Ionic Liquid with SuperPro Designer as a Transportation Energy Transition Strategy Maulidin, Ihsan; Utami, Amaliyah Rohsari I.; Sugiwati, Sri
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67678

Abstract

This Increasing energy consumption has caused energy availability to become increasingly scarce, especially in Indonesia. Therefore, developing renewable energy sources, such as biofuels, is becoming increasingly important to support the energy transition in the transportation sector. One type of biofuel that is promising is bioethanol, which can be produced from biomass such as sugar palm and palm oil. However, the development of bioethanol still faces obstacles in terms of effectiveness, time, and production costs. Performance and economic analysis of bioethanol production from sugar palm and oil palm biomass with ionic liquid (IL) has been carried out using SuperPro Designer (SPD) software. This process begins with testing biomass characteristics to determine the most optimal sugar palm composition. Simulations with experimental conditions show that the optimal IL and biomass ratios are 1 g/g, resulting in ethanol concentrations of 92 g/L and 94 g/L, respectively, close to the theoretical results with 96% conversion of biomass to ethanol. Ethanol production on a factory scale shows cost reductions of up to 30% from initial prices. With the abundant availability of biomass, bioethanol production from sugar palm and palm oil has great potential to be developed in Indonesia, supporting the energy transition strategy in the transportation sector and reducing dependence on fossil fuels.
Cross Operator Charging Station Access Simulator Priyasta, Dwidharma; Hadiyanto, Hadiyanto; Septiawan, Reza; Cesar, Wahyu
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67465

Abstract

The use of battery-based electric vehicles (KLBB) continues to increase, so the ease of using the Public Electric Vehicle Charging Station (SPKLU) infrastructure for recharging electric vehicle batteries must be considered to increase public confidence. One of the problems in using electric vehicles is the concern about long-distance travel (range anxiety) due to limited battery capacity and the minimal number of SPKLUs. This research aims to provide a tool to simulate cross-operator charging stations using the EV roaming method. In this approach, charging station users only need to be registered with one SPKLU operator to use other charging stations. This research develops a set of simulation models called the EV Roaming Simulator and simulates several EV roaming scenarios concerning the basic functionality of four state-of-the-art EV roaming protocols. The simulator consists of three Open Charge Point Protocol (OCPP)-based models: the Charge Point Model, the Central System Model, and the National Access Point Model, representing charging stations, central systems, and roaming hubs. The simulator is capable of executing the given EV roaming scenario. It has the potential to be further developed and used in developing various newly proposed EV roaming systems.
The Role of Algae in Biofuel Production: Potentials and Challenges for Sustainable Transportation Sari, Dessy Agustina; Djaeni, Moh.; Hadiyanto, Hadiyanto; Prasetyaningrum, Aji
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67532

Abstract

This study aims to explore the potential of algae for sustainable biofuel production by examining their molecular biology and the use of advanced cultivation techniques. As concerns over greenhouse gas emissions and rising transportation energy costs grow, algae offer a promising alternative for fuel derived from both food and non-food sources. This review looks at the main biological pathways involved in making biofuels from algae. It focuses on species diversity, lipid content, and new technologies like photobioreactors and magnetic nanoparticle harvesting. The results showcase noteworthy advancements in biotechnology and genetic engineering that boost algae productivity and fuel yield, while also critically examining the environmental impacts such as CO2 emissions and water use, as well as the economic and policy challenges through a life cycle analysis. Adopting a global perspective, this review emphasizes the role of international collaboration and technology transfer in overcoming barriers. Conclusion: Algae-based biofuels hold considerable potential for reducing CO2 and supporting sustainable transportation, yet scaling up production and lowering costs remain challenges. Future research should focus on improving integrated biorefinery platforms, exploring CO2 capture, and promoting international partnerships.
Use of Hydrotreated Vegetable Oil from Palm Oil Sludge by Catalytic Hydrogenation Method as a Solution to Reduce Greenhouse Gas Emission Alfarizi, Fariz; Mubarok, Haris; Arinanda, Ida Bagus Made Krishna
TEKNIK Vol 46, No 1 (2025) January 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i1.67568

Abstract

Indonesia sebagai produsen minyak sawit terbesar di dunia memiliki potensi besar dalam memanfaatkan lumpur sawit (SPO) untuk menghasilkan Hydrotreated Vegetable Oil (HVO). Penelitian ini mengeksplorasi peran HVO dari SPO sebagai solusi strategis dalam transisi energi yang adil, khususnya untuk sektor transportasi. Melalui proses hidrogenasi katalitik, HVO menawarkan pengurangan emisi Gas Rumah Kaca (GRK) hingga 80% dibandingkan bahan bakar fosil, sekaligus mendukung target energi terbarukan nasional. Inovasi ini tidak hanya mengurangi ketergantungan Indonesia terhadap impor bahan bakar fosil tetapi juga mendukung prinsip ekonomi sirkular. Pengembangan teknologi dan kebijakan yang tepat sangat dibutuhkan untuk memastikan keberlanjutan dan skala produksi HVO dari SPO.

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