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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
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Articles 3,145 Documents
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Analisis Aerodinamika Pada Pesawat Tanpa Awak Serindit V-2 Menggunakan Metode Komputasional Dinamika Fluida Soegihin, Agung; Asral, Asral; Anuar, Kaspul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Serindit V-2 is an unmanned aircraft by the Serindit Aero UAV research team. It has the ability to fly rapidly in order to compete in KRTI in the Racing Plane division. Although it has been successfully produced and able to fly, comprehensive research on aerodynamic of Serindit V-2 aircraft flying behavior has never been done before. Aerodynamic research need to be conducted to improve the aircraft performance such as flying capability, air resistance efficiency and etc. This study aims to determine the value of flow characteristic such as coefficient of drag, lift, moment and pressure distribution based on fluid flow that occurs in the aircraft with variations of Angle of Attack and air velocity. The method used is CFD (Computational Fluid Dynamic) which is a computer-based numerical method and performed with an iterative procedure to predict aerodynamic characteristics and fluid flow phenomena on the aircraft surface. Simulations were carried out using Ansys Fluent software on the Serindit V-2 aircraft model sourced from the Serindit Aero Team. The result of the lift coefficient value is CLo = 0.3666 and CLMax value = 1.42626 at α 13o. The CDo obtained was 0.0589258. While the CMo value obtained is -8.34 x 10-5.Keyword: Flow Characteristics, CFD, Ansys Fluent
Analisis Penetapan Titik Kritis Sambaran Petir Pada SUTT 150 kV Koto Panjang – Garuda Sakti Menggunakan Metode Severity Index Surya Putra; Edy Ervianto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The supply of electrical energy starts with the generation process, then transmitted and then distributed to consumers. It cannot be separated from the disturbances that occur, both internal and external. This study discusses external disturbances in the form of lightning strikes at the SUTT 150 kV Koto Panjang - Garuda Sakti tower using the severity index method. This severity index method produces a tower approach that has the highest level of lightning strike hazard. From the research results, the tower with the most significant severity index value is tower number 1 with a height of 197 m with a severity index value of 13.9 with data on the damage to isolators in the period January - May 2020 totaling three pieces. And the tower with the smallest severity index value is tower number 134 with a height of 35 m and does not have insulator damaged data. From these results, the magnitude of the severity index value of the lightning strike vulnerability on the tower is directly proportional to the damage that occurs in the insulator. Key words: transmission, lightning strike, SUTT 150 kV, severity index, insulator
Analisis Performansi Jaringan Fiber Optic Pada Penyambungan Single-Mode Ke Multi-Mode Provider Xl Menggunakan Perangkat Temporary Silalahi, Rhendy Theopilus; Sari, Linna Oktaviana
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Fiber optic network (FO) is currently one of the telecommunications network transmissions widely used by operators to meet the needs of telecommunication services. FO is able to transmit data quickly. This is because the FO has a large bandwidth and has a small attenuation. Behind the advantages, the FO also has a disadvantage, namely the FO transmission does not always meet the damping standards provided by the operator. Such as fiber optic attenuation (attenuation loss), splice loss, connector attenuation (connector loss), bending loss, coupling loss and other attenuation. In general, operators use the single mode – single mode (SM) FO connection method. This research uses single mode – multi mode method. This research can help operators in performing maintenance and troubleshooting by analyzing power link bugdet on single mode – multi mode (MM) FO connection to improve FO network performance, so that operators can compete with other telecommunications service providers.Keywords : Power link budget, loss, single-mode, multy-mode, fiber optic
Sintesis Biodiesel Dari Low Grade Crude Palm Oil (LGCPO) Menggunakan Katalis Sulfonated Carbon Nanospheres@Ferromagnetic (HSO3-CNSS@Fe3O4) Heru Kristianto; Edy Saputra; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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Abstract

Biodiesel is an alternative fuel that is environmentally friendly. Catalysts is commonly used in the production of biodiesel is strong base catalysts which is difficult to separate from the product because it has the same phase as the reactant. Therefore, it is necessary to develop catalyst technology that is more economical, easy to implement, and environmentally friendly, such as sulfonated carbon nanospheres@ferromagnetic catalyst. The catalyst was synthesized by reacting granulated sugar, FeCl2, FeCl3, and the addition of ammonia through a hydrothermal carbonization process for further sulfonated using 98% concentrated sulfuric acid. The catalyst produced has a nanospherical shape with a size of 0.08-0.16 μm. The catalyst is then used in the transesterification reaction to produce biodiesel. Optimum condition is reached at process variables LGCPO weight of 50 grams, stirring speed of 400 rpm, reaction time of 120 minutes, and temperature of 60 oC, with catalyst concentration of 1.5% (w/w) and molar ratio methanol:oil 1:9. The yield of biodiesel is 96.62% with density 878.67 kg/m3, viscosity 3.28 mm2/s, the acid number of 0.29 mg-KOH/g biodiesel and the flash point 127°C comply with the SNI standards (SNI 7182: 2015). Keywords: Biodiesel, carbon nanosphere, LGCPO, transesterification, yield
Prarancangan Pabrik Fenol Dan Aseton Dari Cumene Dengan Proses Kbr Dengan Disain Alat Utama Reaktor Hidrogenasi (R-103) Sitinjak, Monaeka; Heltina, Desi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
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Abstract

Phenol or hydroxybenzene is an organic compound which is widely used. Phenols are also used to produce various substances such as bisphenol-A, phenolic resins, caprolactam, alkyl phenols, and anilines. Acetone is used as a solvent for gums, waxes, resins, oils, dyes and cellulose because it has excellent dissolving properties. The wide use of these materials causes the domestic demand for phenol and acetone to increase every year. This chemical plant is designed to produce phenol and acetone with a capacity of 30,000 tonnes per year. One of the main equipment in this plant is the hydrogenation reactor (R-103). This equipment is designed for the hydrogenation reaction scene between alpha methyl styrene (AMS) and hydrogen. The output of the reactor is in the form of cumene which will be recycled to be fed to M-101 and then used as raw material for making CHP on R-101. This type of reactor is a bubble column reactor using a cooling jacket and is operated at a temperature of 388.15 K and a pressure of 3.039 bar. The liquid feed flow rate is 1353,6109 kg per hour. The gas feed flow rate is 51,274 kg per hour, consisting of cumene and AMS for liquid feed and hydrogen for gas feed. The reactor height is 2,875 m, diameter of 1.3716 with a support and head types, namely torispherical and dished. Economic analysis is carried out to see the feasibility of the factory. Based on the economic feasibility analysis, the phenol and acetone factories were feasible to be built with a 4-year PBP, 13.039% IRR, 25.03% ROI, and 50% BEP. Keywords: phenol, acetone, hydrogenation, reactor bubble column, economic analysis
Perancangan Aplikasi Pengenalan Pariwisata Kabupaten Kuantan Singingi Berbasis Android Menggunakan Layanan Location Based Service (LBS) Ramadhan Ramadhan; Feri Candra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Kuantan Singingi is one of the regencies in Riau Province which is visited by many tourists every year, this is because in Kuantan Singingi there is a ‘Pacu Jalur’ event that is held every year and this event is included in the National tourism calendar. With the inclusion of ‘Pacu Jalur’ in the National Calendar of Events causing many tourists both in the city, out of town and international tourists who come to visit Kuantan Singingi, therefore the purpose of this research is to develop tourism applications that can facilitate tourists to access tourist information in Kuantan Singingi This application uses the LBS service and can be used via android. The stages of designing this tourism application using the Waterfall method. Waterfall is a systematic and sequential development model that links one phase to another in sequence. This research resulted in an Android-based Kuantan Singingi Tourism App that can be used by tourists to find information about tourism in Kuantan Singingi. Keywords: Location Based Service, Android, Waterfall Method, Tourism, Kuantan Singingi
Esterifikasi Asam Lemak Dengan Katalis Enzim Pada Sintesis Emulsifier Mulya, Dynna Ardilla Putri; Zahrina, Ida; Helwani, Zuchra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Monoglycerides, the glycerol monoesters of fatty acids, are molecules consisting of a hydrophilic head and a hydrophobic tail with surfactant and emulsifying properties that help hydrophilic-lipophilic substances mix all together. Therefore, they can be used in food, detergent, plasticizer, cosmetic and pharmaceutical formulations. Monoglycerides (MG) and diglycerides (DG) are a group of synthetic emulsifiers obtained from the process of esterification of fatty acids with glycerol using an organic catalyst, enzyme, and solid catalyst. . In this journal, a green technology catalyst was used in the form of enzyme catalyst. Enzymes are proteins that act as biological catalysts (biocatalysts). Catalysts accelerate chemical reactions. The molecules upon which enzymes may act were called substrate and the enzyme converts the substrate into different molecules known as products. Lipase enzymes were used for biotechnological applications in the dairy, oil, surfactant, and pharmaceutical industries. The production of biotechnology products using the enzyme lipase is the usual choice in line with the rapid progress of development. Keywords: enzyme catalysts, esterification, lipase enzyme, monoglycerides
Penerapan Prinsip Desain Richard Rogers Di Pekanbaru Dalam Perancangan E-Sports Center Bimantara Asnur; Yohannes Firzal; Mira Dharma Susilawaty
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Abstract

The e-Sports center is motivated by the rapid development of e-Sports in Indonesia, including Pekanbaru, various events are held means that e-Sports high enthusiasts today. E-Sports has becomea sport that has formalized and fully supported by the government, as a promising sport for athletes in the future. However, with such rapid development, it is not followed by facilities that couldaccommodate the events, therefore the center of the e-Sports aims to meet all the needs of buildings and other facilities so that e-Sports are even better. In planning the e-Sports Center, it is based onRichard Roger’s design principles about "problem-solving technology" which is how to utilize technology in solving problems and meeting the development needs in architecture. The results ofthis design are the concept of Land of Dawn, legibility, circulation, and zoning in the Land of Dawn by the Rogers principle to accommodate public buildings with a variety of activities in it.Keywords: e-Sports Center, Richard Rogers, Problem-solving
Pengaruh Suhu Co-Pyrolysis Limbah Ban Bekas Dan Tandan Kosong Sawit Terhadap Yield Bio-Oil Nasution, Ahmadani; Sunarno, Sunarno; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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The decline in fossil fuel sources encourages research to find alternative fuels. One of the efforts currently being to find alternative energy sources that have high efficiency and environmental friendly is bio-oil from empty fruit bunches (EFB) and tire waste. This research aims to determine effect of temperature co-pyrolysis of EFB and tire waste on yield bio-oil and then characterize the physics at the highest yield. In this study, the ratio of EFB/tire (R) was 25/75 with an operating temperature of 400°C, 450°C, 500°C, 550°C and 600°C which supplied nitrogen gas of 200 ml/minute for 90 minutes. Bio-oil with highest yield obtained from a temperature of 500°C ie 44.3% with density, viscosity, calorific value, and degree of acidity (pH), respectively 0.994 g/ml, 1.53 cSt, 40.31 MJ/kg and pH 3.39. Keywords: alternative energy, bio-oil, co-pyrolysis, EFB, tire
Design Alat Monitoring pH Levels Limbah Cair Hasil Tambang Batubara Berbasis Arduino Uno Wahyu Dwi Reza; Feranita Feranita; Nurhalim Nurhalim
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In coal mining, to check the pH content of water in liquid waste from coal mining, mining workers mostly use the conventional method, namely by periodically measuring using a digital pH meter or litmus paper. Manual pH reading system makes handling slow. Based on these reasons the research designed a device that can monitor the pH value, the working principle of this tool is that the pH electrode is inserted into the sample solution and then the electrode detects the sample solution and will change the electrical signal where the output will be amplified by an amplifier circuit in the form of an analog voltage and will be converted. by Arduino Uno, analog data is converted into digital data or ADC (Analog To Digital Convertion) so that the results will be displayed on an LCD that is equipped with I2C. And this tool is also equipped with RTC (Real Time Clock) so that it can display the time when data collection on the pH level of the waste. The tool that is designed has an error percentage of the pH meter manufacturer of 0.4969%. By using this tool the authors conclude with 0.4 grams of lime (CaO) on the prototype or 480 kg in real conditions with a ponds area of 600 m3 can reduce the voltage output on the ph sensor from 3.25 V to 2.56 V so that the pH value increases. from 2.73 to 7.61 in pond 4 or dump ponds. Keywords: Coal waste, pH, Arduino Uno, ADC, voltage, chalk (CaO)

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