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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Articles 3,145 Documents
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Desain Ulang Tata Letak Fasilitas Produksi Menggunakan Metode Systematic Layout Planning Pada Pabrik Kelapa Sawit Sungai Pagar Choir, Mustofa; Arief, Dodi Sofyan; Siska, Merry
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

PTPN V PKS-SPA is a state owned company that produces Crude Palm Oil (CPO) and Kernel. The problem that happened in this company is a material transfer distance is too far. Thus it is necessary to redesign the production floor to minimize material displacement distance. The design of the production floor layout will use the method of Systematic Layout Planning (SLP) and also with the help of software blocplan. SLP method is a method in the layout of the production facility that is able to overcome the problems of production flow by means of analyzing the flow of materials, make some diagrams, and then make alternative design and ends with the evaluation of the design. While blocplan software is a program that helps in planning the layout of the production facility in rectangular shapes by using input data including qualitative and quantitative data. With SLP method and also software blocplan obtained three alternative production floor layout. The first alternative is the transfer of a total distance of 78.5 m, 80.5 m alternative second and third alternative is 68.5 m, so that a third alternative selected for the smallest distance moved by the flow of materials. After alternate layout is determined, then the design of the production floor layout drawn in SketchUp software.Keywords: layout, SLP, blocplan, SketchUp
Proses Densifikasi Pelepah Sawit Menggunakan Crude Gliserol Sebagai Filler Menjadi Bahan Bakar Padat Yudha, Ricky Satria; Helwani, Zuchra; Komalasari, Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Empty fruit bunches only used as a source of raw materials for animal feed, compost and organic fertilizer in the plantation. Palm empty fruit bunches has a calorific value of 18.795 kJ/kg. The calorific value can be increased by torefaction. Torefaction is one composing method with temperature 200 - 300°C to increase the density of the biomass so that it will increase the calorific value of the biomass. The purpose of this research is to produce solid fuel products from palm empty fruit bunches uses torefaction process, to determine the characteristics of the product and determine the effect of glycerol filler composition and pressure in the process of densification in density, calorific value and proximate. The variables for this research were glycerol filler composition (10, 20 and 30%) and pressure (50, 70 and 80 bar). The particle size used were less than 20 mesh. The highest density of the product was 0.6893 gr/cm3 which obtained at 10% composition and 50 bar. The lowest ash content of the product was 8.91% which obtained at 30% composition and 80 bar. The lowest moisture of the product was 0.91% which obtained at 10% composition and 80 bar. On the other hand, it produced highest fixed carbon and calorific value for 45.47% and 24011.77 kJ/kg, respectively.Keywords: torefaction, density, calorific value, filler, palm empty.
Pengembangan Dan Pengujian Dinamometer Berbasiskan Strain Gauge Dengan Batang Regang Tipe Four Square Stalk Untuk Pengukuran Gaya Potong Mesin Bubut Donara, Geovanny; Yohanes, Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Dinamometer is an instrumentation that function for measure the cutting force on the lathe machine. The dynamometer principle use a strain gauge that is to utilize the strain that occurs on the strain bar as a reader in Voltage units then converted into force units in Newton. The strain on the strain bar is read by strain gauge,, then amplified using amplifier (signal amplifier) so it can be read and displayed on the LCD (Liquid Crystal Display) and storing data measurement results on the computer (PC) using Data Logger. Research that has been done before there are still some weaknesses which need to be developed in this research. To get the measurement result of the dynamometer, development begins with changes in the dimension of the strain bar and changing the type of material on the part of the dynamometer which experienced strain and modifications are made to the electrical circuit of the dynamometer. Then do the process of finding correlation between Depth of Cut with Cutting force. The purpose of finding correlations between these two variables is to get correlation factor which will be incorporated into the arduino program. Methods in finding correlation factor used is by giving a disruption of loading, the loading is given through a two-way force that is tangential direction loading and axial direction loading.Keywords : Cutting Force, Strain Bar, Stress, Wheatstone Bridge, Correlation Factor.
Kajian Pola Distribusi Hujan Jam-Jaman Di Kabupaten Rokan Hulu Menggunakan Data Satelit Tropical Rainfall Measuring Mission (TRMM) Solihin, Muhamamad Afdel; Handayani, Yohanna lilis; Fauzi, Manyuk
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Flood calculation design requires an input of rainfall design that is distributed rainfall into hourly rainfall. Distribution of each pattern from a hourly rainfall was necessary to convert rainfall into hourly rainfall designed. Measurement Rainfall data was used utilizing satellite data. The Rainfall data was obtained from Tropical Rainfall Measuring Mission (TRMM) of satellite data. Processed of TRMM data has been done using a Command Prompt software. Data of the Satellite TRMM were extracted by Command Prompt, it was transfered by Zilla File Software which is gsmap. Duration of rainfall into hourly rainfall from 2009 to 2016 was taken one hour until sixty-nine hours. There is incidence of rain with a total of 4001 incidents of rainfall with 22.1228 mm ranifall average, and 839 was the most rainfall incidence in one hour.Keyword: Rainfall distribution, Satellite data, Tropical Rainfall Measuring Mission
Pemisahan Emas Pada RAM (Random Access Memory) Komputer Dengan Metode Elektrolisis Edo Prima Arif; Yusnimar Yusnimar; Drastinawati Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Gold metal has been using in electronics and telecommunication industry, for example RAM(Random Access Memory)computer. The separation of gold from the RAM(Random Access Memory)computer has been done in this study. To get the maximum results in the separation of the gold used variations potential difference( 6; 9; 12 volt ) and the type of precipitant (NaHSO3 and H2C2O4) . In this study, a certain number of samples is used samples RAM(Random Access Memory)computer electrolyzed H2SO4 for 1 hour. The precipitate formed is separated from the filtrate. The precipitate was dissolved in Aqua Regia at a temperature of 70˚C for 30 minutes further diluted with Aqua DM until the volume is 50 mL . Au concentration was analyzed by AAS(Atomic Absorption Spectrophotometry)and Au deposited with NaHSO3 and H2C2O4 . Based on the analysis result, the maximum Au concentration at the former RAM(Random Access Memory)computer is equal to 0,5054 ppm with potential 12 volt. For 5 grams of the sample , the maximum weight of Au precipitate obtained 0.97 miligrams by using H2C2O4 as a precipitant .Keyword: Au concentration, NaHSO3, H2C2O4, H2SO4
Analisis Potensi Erosi DAS Petapahan Pada Embung Petapahan Lukman Nul Hakim; Mudjiatko Mudjiatko; Trimaijon Trimaijon
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Land use change in the Petapahan Watershed will increase the flow of the surface. The surface flow will increase the amount of soil erosion and sediment transport capacity. Sediment transport will enter the Petapahan Reservoir, so that will lead to silting on thePetapahan Reservoir. It will have an impact on the function and effective life of the reservoir. The USLE method was used to estimate erosion in the Petapahan watershed. GIS was used to predict the value of USLE parameters. The result of analysis shows thatErosion occurring in Petapahan Watershed is in low grade (15 - 60 ton/ha/year) and the potential of erosion that goes to Petapahan Reservoir is 294,8287 ton/year.Keywords: land use, erosion potential, USLE, GIS
Perencanaan Jaringan LTE FDD (Frequency Division Duplex) Pada Frekuensi 900 MHZ Di Kota Taluk Kuantan Arif Fauzar; Linna Oktaviana sari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

3GPP sets are the standard for the latest wireless communications technology for Long Term Evolution (LTE). It has been used to meet the needs of consumers today. But only few of development city have implementing it. The rest of the city still not implement it. One of them is the taluk kuantan city. This region has not been deployed by this technology. Due to that reason the design has been made to choose this city. This paper proposes 900 MHz LTE Frequency Division Duplex(FDD)design and simulation through software radio planning atoll. The design process is done by comparing several design scenarios, with reference to research on the previous research paper with the same frequency. The simulation results has obtained in the form of the following parameter i.e. signal level, Carrier to Interference-Noise Ratio (CINR) downlink, CINR uplink and monte carlo analysis. The results were compared to above mentioned parameter that has been published in the previous research result. The number of cells required at least 83 eNodeB. The signal coverage level able to achieve ≤ -85 dBm which better than previous research result (≤-110 dBm), while downlink signal level CINR ≥ 2,479 dB And CINR uplink signal level has ≥ 17 dB. As for the monte carlo simulation able to achieve 81,3%. Finally for throughput uplink and downlink able to achieve ≥ 1 Mbps which is same as previus research result.Keywords: LTE, Atoll, FDD, 900MHz
Pemodelan Dan Simulasi Motor Kapasitor Pada Kondisi Variable Speed Adisa Adisa; Budhi Anto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Permanent Split Capacitor (PSC) Motor is a type of single-phase induction motor which widely used and one of circuit to run the water pump. The water pump is needed in the irrigation of agricultural land. If the location of agricultural land is not supplied with electricity grid, then the Water Pump may be driven by solar modules. This paper describes a design of power electronics system that convert DC Power from Solar Panels into AC Power for supplying the PSC Motor. The idea of this paper is to look at the speed characteristics of PSC Motor from the effect of sunlight Irradiance. The system is simulated using MATLAB-Simulink R2015a. The system driver consist of Push Pull Converter and Full Bridge Inverter type. DC voltage of the solar panel is raised to 311 V using Push Pull Converter, then the voltage is converted into AC voltage using the full bridge inverter. PSC Motor models and solar module models are using the available models in the MATLAB-Simulink R2015a library. The Motor Capacitor models is using the Single Phase Asynchronous Machine models and Capacitor of 16 μF. The Motor parameters is using the parameters that have been proposed by Hrabovcova V. The solar Modules use the MEMC Singapore MEMC-M250ACA-20. In this research, the solar panel was given the sunlight Irradiance with 5 conditions, the condition is: Irradiance 1000 W/m2, 800 W/m2, 600 W/m2, 400 W/m2, and 200 W/m2. The effect of sunlight Irradiances shows the speed characteristics of PSC motor that follows logarithmic trendline.Keywords: Solar Module, Push-Pull Converter, Full Bridge Inverter, Permanent Split Capacitor Motor, MATLAB-Simulink.
Kuat Tekan Dan Kuat Tarik Belah Beton OPC Dan OPC Abu Sekam Padi Di Lingkungan Gambut Yogie Pranata; Ismeddiyanto Ismeddiyanto; Monita Olivia
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The objective of the study is to investigate the mechanical properties of concrete with different replacement levels of Ordinary Portland Cement (OPC) by Rice Husk Ash (RHA). Two RHA replacement levels were considered in the study which is 5% and 10% by the weight of cement. After the specified initial curing period (28 days), specimens were immersed directly in peat water canal for 28 days. The mechanical properties was evaluated by measuring the compressive strength and tensile strength of the concrete specimens. The result shows that the compressive strength of OPC concrete is higher than OPC concrete using RHA as cementitious materials. A replacement level of 10% RHA in OPC concrete performs and shows better tensile strength than other replacements.Keywords : Mechanical properties, OPC, Rice Husk Ash (RHA), peat water
Sintesis Biodiesel Dari Minyak Biji Nyamplung (Calophyllum Inophyllum) Menggunakan Katalis Geopolimer Dari Abu Sekam Padi Dan Kaolin M. Wahyu Nugraha; Edy Saputra; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Biodiesel is an alternative diesel fuel produced from vegetable oil triglycerides transesterification reaction. Besides being derived from renewable sources, biodiesel generate emissions better than diesel. Utilization of vegetable oils such as potential as Calophyllum inophyllum seed oil as raw material biodiesel because it is non-edible. It is necessary to develop catalyst technology in order to get the production process becomes more economical, applicable, and environmentally friendly, one of the catalysts is rice husk ash (RHA) geopolymer. The geopolymer synthesized by reacting sodium silicate, metakaolin, NaOH, and water. Characterized geopolymer produced include alkalinity, surface morphology, elemental composition, and surface area. The variation of process variables conducted to assess the effect on the yield of biodiesel. Independent variable weight of oil 50 grams, mole ratio methanol:oil 9: 1, reaction time 120 minutes, and temperature of 65 °C, with the dependent variables %w/w catalyst 0.79%-2.2% and stirring rate 117-682 rpm. The result of physical characterization density 866 kg /m3, viscosity 4.13 mm2/s, acid number of 0.42 mg-KOH/g biodiesel and flash point 140 °C meet the SNI standards (SNI 7182: 2015).Keywords: Biodiesel, Calophyllum inophyllum Oil, Catalyst, Geopolymer, Rice Husk Ash

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