IPTEK The Journal of Engineering
IPTEK The Journal of Engineering (E-ISSN: 2337-8557) is an academic journal on the issued related to engineering and technology. IPTEK The Journal of Engineering published first time in August 2014. From 2014-2018 (Volume 1-4) IPTEK The Journal of Engineering publish three issues (numbers) annually (April, August, and December). Since 2019 published annually in April and August. It is open to all scientist, researchers, education practitioners, and other scholars. Therefore this journal welcomes various topics in different engineering disciplines. Our target is to reach all universities, research centers and institutes in the globe. Call for Papers IPTEK The Journal of Engineering is an open-access journal, which means that visitors all over the world could read, download, cite, and distribute papers published in this journal for free. We adopt a peer-review model, which insured fast publishing and convenient submission. In addition to peer-reviewed original research papers, the Editorial Board welcomes original research reports, state-of-the-art reviews and communications in the broadly defined field of engineering science and technology. Theses, dissertations, research papers, and reviews are all acceptable for publication. All topics should relevant to the issues faced by industries, governments, and communities. The broad-based topics may be covered by the following knowledge areas: Computer Engineering and Information Systems (Telematics, Algorithms and Programming, Network Based Computing, Smart Computing and Vision, Intelligent Information Management, Computer Architecture and Networking, Applied Modeling and Computing, Graphics Interaction and Games, Software engineering, Information Technology Infrastructure and Security, Information Systems Management, Data Engineering and Business Intelligence, Data Acquisition and Information Dissemination, Enterprise System, and Smart Cities and Cyber Security) Civil Infrastructure Engineering (Hydrotechnics and Surveying, Construction Implementation Management, Building Materials and Structures, and Transportation and Geotechnics) Mechanical Engineering (Energy Convertion, Metallurgical and Materials Engineering, Mechanical Design, and Manufacture) Electrical Engineering Automation (Cyber Physical, Automation, and Industrial Robots, Programmable Logic Controller and Control System, Antennas and Propagation, Instrumentation, Measurement and Power System Identification, Multimedia Telecommunications Network, Multimedia Communication, Electric Energy Conversion, Electric Power System Simulation, High voltage, System and Cybernetics, Microelectronics and Embedded Systems, Biocybernetics, Instrumentation and Biomedical Signal Processing, Multimedia Computing and Machine Intelligence, and Digital Signal Processing) Chemical Engineering (Applied Chemistry, Biochemical and Bioprocess, Advance Functional Materials and Analysis, Thermodynamic, Chemical Reaction, Material and Nanocomposite, Bioenergy, Wastewater Treatment, Process Integration, Fluid Mechanic, and Sustainable Industrial Systems) Instrumentation Engineering (Control Instrumentation, Measurement Instrumentation, Photonic Engineering, Vibration and Acoustics, and Embedded Systems and Physical Cyber) Business Statistics (Business Analytic, and Quality and Productivity Engineering) And physical, chemical, biological, and environmental sciences that are directly related to engineering.
Articles
311 Documents
<![CDATA[The Effect of Fan Blade Radiator Gas Turbin Generator Angle on Auxiliary Cooling Water System Performance ]]>
<![CDATA[Erryawan Kusuma]]>;
<![CDATA[Agus Sigit Pramono]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 5 No. 1 (2019) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/joe.v5i1.5023
<![CDATA[Auxiliary Cooling Water System (ACWS) on Gas turbine Blok 1 No 3 Muara Karang has declined its reliability because of 4 fan radiators must be operated due to increasing ambient air temperature and increase inspection interval from 8000 to 32.000 EOH after Upgrade in turbine part. This study aims to optimize Radiator ACWS performance by increasing the cooling fan air mass flow by changing the fan blade angle so it can be operated with 3 fan on and 1 fan standby. This research began with taking data each measurement at 11°, 13°, 15°, 17°, and 19°. Then, it will simulated by software to know the influence of air mass flow addition due to the change of the blade fan angle to the radiator water outlet temperature and to know the input operating parameters when the temperature outlet radiator is 46°C. The results of this study is validation of experimental and numerical data calculations that have errors below 5%. The maximum angle of fan blade can be set until 19°. At 16.7° with operation 3 of 4 fan on, radiator temperature output is 46° and heat disposed is 627.2 kW where this value is the same value as the current condition.]]>
<![CDATA[Effects of Pilot Injection Timing on The Engine Performance of A Diesel Dual Fuel Engine ]]>
<![CDATA[Jose da Silva]]>;
<![CDATA[Bambang Sudarmanta]]>;
<![CDATA[Dori Yuvenda]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 5 No. 2 (2019) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v5i2.a5014
<![CDATA[The combustion process in dual fuel diesel engines occurs sequentially starting with premix burning. The premix burning starts with the ignition delay process. The presence of CNG causes the ignition delay process to become longer, thereby reducing engine performance and increasing emissions on dual fuel diesel engines. This study uses diesel engine type Diamond DI 800 with dual fuel indirect injection model system. The method used a variation of diesel pilot injection timing 110 CA, 130 CA, 150 CA, 170 and 190 CA BTDC. Testing is done with a constant engine speed of 1500 rpm and loading 500 to 3000 watts with 500-watt intervals. The results show that by advancing the diesel pilot injection timing where brake horsepower and the average effective pressure between single fuel and dual fuel is not too far as the current and voltage changes generated by the generator are not too small. While optimal thermal efficiency increased by 4.11%, while CO and HC emissions decreased respectively by 10.85% and 8.28% at occurred at the pilot injection timing 170 CA BTDC but still under the single fuel engine.]]>
<![CDATA[Discrepancy of Home-Based School Regulation in West Jakarta Study Case of Student High School of 78 and 16 ]]>
<![CDATA[Nisa Maulia]]>;
<![CDATA[Ratna Saraswati]]>;
<![CDATA[Raldi H Koestoer]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 5 No. 2 (2019) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/joe.v5i2.4992
<![CDATA[The Local Government has been limiting prospective students by implementing home-based school regulations since 2013. The study highlights the spatial pattern of trip distribution of Student High School of 78 and 16 in which both are located near the west border of Jakarta as the impact of government regulation. Primary data were collected using questionnaires and GPS receiver used to capture the coordinate points of schools and students’ home address. Secondary data included Administrative and Road Network Map. The methods applied involved Mapping Network Analysis and Statistical Cross Tabulation. Network analysis was performed to evaluate nearest school to student and a set of origin-destination (OD) matrix. Cross tabulation was applied to evaluate the frequency of student travel pattern. The analyses showed that Student High School of 78 trip distribution was widen and widespread than of Student High School 16.]]>
<![CDATA[Relocation Of Earthquake Hypocenter In The Flores Region Using Hypo71 ]]>
<![CDATA[Regolinda Maneno]]>;
<![CDATA[Bagus Jaya Santosa]]>;
<![CDATA[Gazali Rachman]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 5 No. 2 (2019) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v5i2.a5024
<![CDATA[Flores is one of the seismically high activity zones of Indonesia region as a consequence of Indo-Australian plate subduction under the Eurasian plate. Tectonic earthquakes required to be studied because in large magnitude it can bring disaster. Therefore the precise of hypocenter determination needs to be done. In this study, hypocenter relocation is done by Single Event Determination method using hypo71. The data used are earthquake event data in Flores area which has magnitude > 4 SR at period between January 2010 and March 2018 obtained from BMKG catalog. Hypo71 requires data of arrival time of P and S waves at the recorder station. The arrival time of P and S waves data at each station is obtained by picking P and S waves using SeisGram2k70. The results showed that the source of the earthquake experienced a change of position both horizontally and vertically. In the vertical direction of hypocenter earthquake changes in the distance between 0.02 - 89.61 km, while in the horizontal direction the hypocenter of the earthquake changes in the distance of 1.11 - 71.11 km. After relocation, the hypocenter of the earthquake distributed along the Back Arc Trust in the northern island of Flores. Hypocenter relocation using hypo71 yields a small residual between the observation time and calculation time denoted by RMS <1.]]>
<![CDATA[Numerical Investigation of Over Fire Air (OFA) Effect on Flow Characteristics, NOx Combustion and Emission in a 600 Mw Tangentially Fired Pulverized Coal Boiler ]]>
<![CDATA[Eka Setiawan Seputro]]>;
<![CDATA[Bambang Sudarmanta]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 5 No. 2 (2019) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v5i2.a5017
<![CDATA[One of the coal-fired air emissions in boilers is NOx, which has a significant impact on the environment and could cause acid rain, ozone formation, visual impairment and health problems in humans. There are several technologies to reduce and control the formation of NOx emissions, which one of these technologies is the use of over-fire air (OFA). In this research will observe the effect of overfire air (OFA) usage and analyze by numerical 3D modeling method using computational fluid dynamics (CFD) in Paiton 9 power plant boiler and analyzed for 5 (five) OFA damper opening variations, i.e 0%, 25%, 50 %, 75% and 100%. This research will analyze several factors that have significant influence on NOx emission formation, that are: the temperature distribution of the boiler during the combustion process, the distribution of nitrogen oxide (NO) and carbon dioxide (CO2), direction of flue gas flow and trajectory of coal particles and residence time indicating the length of time of burning. The results showed that the lower the flame temperature, the smaller the formation of NOx; the smaller the oxygen content in the combustion process, the smaller the formation of NOx; the shorter the residence time of combustion products in the high temperature zone the smaller the formation of NOx, and the smaller the nitrogen content in coal, the smaller the formation of NOx.]]>
<![CDATA[Landslide Analysis Using Seismic Refraction Tomography And MASW: a Case Study in Ponorogo, East Java, Indonesia ]]>
<![CDATA[Yusri Prayitna]]>;
<![CDATA[Widya Utama]]>;
<![CDATA[Dwa Desa Warnan]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 5 No. 2 (2019) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v5i2.a5025
<![CDATA[Ponorogo district morphology form consisting of highlands and hills make this area vulnerable to landslides. Based on the BNPB (National Disaster Management Agency) data from 2013 to 2017, 77 landslides and 35% have occurred in Ngrayun and Slahung sub-districts. One area that has the potential to experience landslides is Tugurejo village in Slahung District. This study aims to determine the physical properties of subsurface rocks using SRT (Seismic Refraction Tomography) and MASW (Multi-channel Analysis of Surface Waves). The seismic velocity distribution defined from the SRT and MASW at the study sites shows a zone with a higher porosity that is interpreted to represent the level and depth of rock mass movement. P-wave velocity and S-wave indicates very low velocity of 500 – 1200 m/s and 100 – 250 m/s at depths up to 5 m.]]>
<![CDATA[Isobaric Vapor-Liquid Equilibria for Binary System of Ethanol (1) + Eugenol (2) at 400 and 760 mmHg ]]>
<![CDATA[Irwan Hidayatulloh]]>;
<![CDATA[Annas Wiguno]]>;
<![CDATA[Kuswandi]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 5 No. 2 (2019) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/joe.v5i2.5237
<![CDATA[Eugenol is the main component of clove oil, while the main impurity of it is beta-caryophyllene. Eugenol with a purity higher than 98 percent has a higher price than low purity eugenol. Thus, further eugenol purification process is needed. Common purification processes are extraction and distillation. In the design and simulation of the distillation process it requires a knowledge of Vapor-Liquid Equilibrium (VLE) data from a mixture of components to be separated (eugenol and ethanol) as the result of extraction process. In this work, the experimental VLE data were measured for binary mixtures of ethanol (1) and eugenol (2) at 400 and 760 millimeter mercury. The apparatus used for this experiment is an Othmer still equipped with a vacuum pump and a manometer. The experiments were performed to obtain equilibrium data (temperature), component concentrations in liquid phase (x), and in vapor phase (y). The binary VLE data were correlated with the Wilson, NRTL and UNIQUAC models to obtain the binary parameters. The reliability of these models were tested by comparing with experimental results using Root Mean Square Deviation (RMSD). For the system and the operation condition studied, the Wilson, NRTL and UNIQUAC models suited well and give satisfactory results based on the RMSD values.]]>
<![CDATA[Study Literature of Extraction Lipid Method from Microalgae Nannochloropsis sp ]]>
<![CDATA[Adelya Kristia Putri]]>;
<![CDATA[Tanti Irma Nuraini]]>;
<![CDATA[Yustia Wulandari Mirzayanti]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 1 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i2.a7231
<![CDATA[Biodiesel is a promising alternative fuel obtained from plant oils and animal fats through the esterification process with alcohol. Lipid microalgae Nannochloropsis sp. can be used as raw material for the production of biodiesel or biofuel with oil content in the microalgae Nannochloropsis sp. as much as 21.3 - 32.7% so, it has the potential to be used as a raw material in making biodiesel. Biodiesel produced from microalgae biomass is the most suitable alternative fuel for the future and environmentally friendly fuel. In microalgae lipid extraction, Nannnochloropsis sp. using several process aids such as autoclave, microwave, and soxhlet. Different types of solvents are used to determine the% yield of lipids present in microalgae. Extraction was carried out to compare the extraction method using autoclave, microwave, and soxhlet to obtain the best method that produced the most substantial % lipid. An autoclave obtained the most abundant lipid yield with n-hexane solvent with a ratio of 3: 1 solvent and algal oil. Thus, this review describes the lipid extraction of the microalgae Nannochloropsis sp. with various extraction aids and different solvent types related to lipid production over the past few years.]]>
<![CDATA[Design and Development of Fuzzy-PID Controller for Four-Wheeled Mobile Robotic Stability: A Case Study on the Uphill Road ]]>
<![CDATA[Brian Raafi’u]]>;
<![CDATA[Purwadi Agus Darwito]]>;
<![CDATA[Alex Taufiqurrohman Zain]]>;
<![CDATA[Fitri Adi Iskandarianto]]>;
<![CDATA[Herry Sufyan Hadi]]>;
<![CDATA[Sefi Novendra Patrialova]]>;
<![CDATA[Rakmad Amrinsyah Badrul Alam]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 1 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i2.a7245
<![CDATA[Design intelligent control to maximize the performance of the Four-Wheeled Mobile Robot (FWMR) in case of uphill road problems. The variation of slope angle and load variation on the uphill road is applied to know the performance of the automatic control system on FWMR. The research is divided into three two covering, system identification, design system and simulation testing. The Rotary speed control system response with fuzzy-PID control method has a good performance by anticipating various tilt angle 5o. The system can through uphill with loads 11N with a steady time and fast travel time. The best travel time in the 5o tilt angle condition is 2 seconds with a 4m circuit length. This research concludes that fuzzy-PID control can be implemented and increase the dynamic response of the FWMR effectively on the uphill road problems.]]>
<![CDATA[Modeling Risk Factors for Total Paralysis of Stroke Patients in RSUD Dr. R. Sosodoro Djatikoesoemo Bojonegoro Using Binary Logistic Regression ]]>
<![CDATA[Puji Hidayatus Sholikhah]]>;
<![CDATA[Sri Pingit Wulandari]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 1 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i2.a7225
<![CDATA[One of the causes of death in Bojonegoro Regency is stroke. Stroke is a nervous system function disorder that occurs suddenly and is caused by circulatory disorders of the brain. From 2015 to March 2018, stroke has always been ranked first as the type of disease that most patients suffer in RSUD Dr. R. Sosodoro Djatikoesoemo Bojonegoro. Stroke can cause sufferers to experience limited ability to carry out daily activities (eating, dressing, defecating, bathing, and moving) because there are limbs that are paralyzed so it is difficult to move. Therefore, this study aims to describe the characteristics of stroke patients and to analyze the risk factors that cause stroke patients get totally paralyzed using binary logistic regression. The data used in the form of secondary data obtained from the results of medical records of stroke patients who were hospitalized at RSUD Dr. R. Sosodoro Djatikoesoemo Bojonegoro from January to March 2018. Based on the results of the analysis showed that the majority of stroke patients are over 55 years old and males also the risk factors that cause stroke patients geet totally paralyzed are the type of stroke and previous history of stroke.]]>
