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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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Perancangan Evaporator Jenis Tube In Tube Heat Exchanger Pada Sistem Adsorpsi Kapasitas 5000 BTU/h Dengan Pasangan Karbon Aktif-Metanol Sebagai Adsorben-Adsorbat Johannes Panjaitan; Awaludin Martin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Global warming and high electrical energy consumption issues have been attention all human in the world. Among various technologies especially refrigeration that being developed to prevent those problem. The refrigeration vapor compression cycle, which impaction on the ozone layer and potential damage of global warming because contains HCFC and CFC and Beside that, the highly electrical energy consumption might be happen. In this research proposed a designing and manufacturing of adsorption cooling system with a double bed adsorbed with capacity 5000 Btu/h. The methanol was used as adsorption and activated carbon as adsorbent, which have characteristic zero Ozone Depletion Potential (ODP) and zero Global Warming Potential (GWP) that was expected to be able to decrease damage to the ozone layer and minimize the electrical energy consumption. The method used in this research was the design. The adsorption cooling system contained two adsorbed in a U-tube and circular plate fin with tube from copper and circular plate fin structure from aluminum which a distance fins of 5 mm. An evaporator and a condenser (tube in tube of heat exchanger) with a tube from copper with total heat transfer area was 0.457 m² for evaporator, with desorption/ adsorption phase time was 20 minutes.Keywords: Adsorption, Methanol, Evaporator, Activated Carbon.
Aspek Pembuatan Model Listrik Hibrid Untuk Pemakaian Beban Rumah Tangga Di Kota Pekanbaru Salman Alfarisi; Indra Yasri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The burden of household consumption in the city of Pekanbaru in each year isincreasing. PLN as a provider of primary electrical energy source load households dependon fossil fuels to produce electricity, but the amount of fossil energy resources availabilityis very limited because it requires the utilization of alternative energy sources although ona small scale for the initial process. New alternative and renewable energy is currentlywidely used, the use of renewable technologies, such as hybrid. Hybrid is an electric powersystem that combines multiple sources of electrical energy that can be used as a compactand integrated. Based on the above issues will require a feasibility analysis models ofhybrid power plant to the load of households in the city of Pekanbaru. This study usesHomer simulation system consisting of solar cells (PV), PLN, and Wind. Based on testinghybrid systems with the optimum configuration consists of PV and PLN with the total NetPresent Cost (NPC) amounted to $ 5.156 and the economic costs (COE) amounted to $0131 / kWh. The simulation results in supply by 37% from PLN and accounted for 63% ofthe solar energy.Keywords : renewable energy,Hybrid,Homer
Perbaikan Faktor Daya Dengan Implementasitriac Berbasis Mikrokontroller Pada Jaringan Tiga Fasa Seimbang Nico Latino; Amir Hamzah
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The need for good power quality is very important. The good power quality is thepower factor can reach 0.85 up to 1 and it will improve power capacity, and energyefficiency. In common, Because the inductive load of PLN customers, power factor turnbelow 0.85. To Increase the power quality, it is necessary to install capacitors based on load,poor power factor need more capasitors. The capasitors are connected to system trough asoft switch by using TRIAC to reduce inrush current that happen with contactor switch.The power factor corrector circuit are consist of phase detector, zero crossing detector,and XOR logic gate used for produce the phase angle that feed to Arduino input for readingthe value of power factor. Then in Arduino will process the input to TRIAC for set up certainpulse that trigger firing angle in order to control the duty cycle on TRIAC. Firing angle canbe vary based on the quality of power factor.Keywords: Power factor, capasitor, arduino, TRIAC, duty cycle
Menentukan Lokasi Gangguan Dengan Metode Simple Reactance Dan Takagi Pada Saluran Distribusi Bangko PT. Chevron Pacific Indonesia Menggunakan Software ETAP 12.6.0 Yellyna Sari Agus; Edy Ervianto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Accurate estimastion of fault location is essential for reliability of power system. For this purpose, fault location algorithms are studied and compared in this paper. This paper use two methods for fault location calculation by the short circuit faulted on the distribution line in Bangko PT. Chevron Pacific Indonesia. The two methods used in this paper are simple reactance and takagi. To analyze both methods, various types of short circuit faults were modeled and simulated at various location on a distribution line using ETAP 12.6.0 program. Short circuit types that simulated in this paper are phase to ground (F-G), phase to phase (F-F), phase to pase to ground (F-F-G), and three-phase (F-F-F). Both methods using current and voltage data to calculate the fault distance on the distribution line that obtained from the simulated result data. The percentage error due to simple reactance method and takagi method of single phase to ground and phase to phase faulted were zero. But have a different results for phase to phase to ground (F-F-G) and three phase (F-F-F) faulted by using simple reactance had only one error and takagi obtained by 6 error and had the highest error of 1,2%. The results have shown that the simple reactance method more easier and accurately than takagi method to estimate the location of short circuit faulted on distribution line.Keywords: Fault Location, Short Circuit Faults, Simple Reactance Method, Takagi Method, Software ETAP 12.6.0
Aspek-Aspek Perancangan PLTB Untuk Penggunaan Rumah Tangga Di Kecamatan Tembilahan Hulu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Tembilahan hulu is area which has a low wind speed with 4 m/s as a mean. Vertical axis wind (VAWT) turbine is more effective to low wind speed aplication with several advantages, can capture wind from any direction and simples in fabrication and cost. 3 blades H-Darrieus type is chosen for used. This paper is focused on a technique that can be used effectively for design and fabrication to developed wind turbine as a device to convert kinetic energy from wind to electrical power. Q-blade is used to simulation and determined parameter to design wind turbine. NACA 8612 used as airfoil with 0,21 m chord line and 40 angle of attack. Turbine has 0,4 m in height and 0,6 m diameter. Performence test show torque, rotational speed, power coefficient and mechanical power that can used to determine generator and accumulator for this system.Keywords: Low wind speed,vertical axis wind turbine,Darrieus, Q-blade
Analisa Simulasi Unjuk Kerja Filter Aktif Cascaded Multilevel Inverter Untuk Mengurangi Efek Harmonisa Keluaran Hybrid Bidirectional Inverter 1500 Watt Ade Maulana; Amir Hamzah
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Harmonics cause voltage distortion that can result in electrical equipment becomes hot quickly, the power factor is low, interference with the equipment that use relays for switching and measurement accuracy kWh-meter induction type will be reduced, therefore harmonics requires serious attention, to cope with a wave distorted would require a technology that has the function of fixing the waves, this technology is called filter. The use of filters to reduce harmonic been widely recommended to overcome these problems. This final project describes one harmonic filter configuration, that’s called Active Filter parallel configuration, the method used is Cascaded Multilevel Inverter. The results of the simulation system design and form of the value of THD (Total Harmonic Distortion). THD value on systems that use an active filter Cascaded Multilevel Inverter showed a significant decrease compared to the system without the addition of a filter on Bidirectional Hybrid Inverter 1500 watts.Key Word: Harmonic, Active Filter, Cascaded Multilevel Inverter
Desain Pengontrolan Starting Motor Induksi Tiga Phasa Berkapasitas 2.5 MW Dengan Menggunakan Auto Transformator Ganda Muharetana; Noveri Lysbeti Marpaung
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Three phase induction motor is very widely used as a driving force in the industry because manyhave the advantage, but there are also disadvantages. Advantages of three phase induction motorthat is strong and sturdy, cheap and reliable, high efficiency on the state of normal work, andperawatanya easy, while weaknesses such as the current starting of the initial reach five to seventimes the nominal current motor work full load, especially for motor big power. Use of the methodof induction motor starting using autotransformator can reduce the starting current induction motorso that the motor starting currents induced not by starting to use the method of direct on line (DOL).The use of multiple tap for starting a good thing to do because it can prevent the starting current issuddenly soared, so that the starting current could rise bertahap.Adapun objectives of workmanshipof this study are: Designing Control Design Three Phase Induction Motor Starting Capacity 2.5MW With using Autotransformator, so that it can cope with the weakness of the current inductionmotor in the form of initial starting of reaching five to seven times.Keywords : Induction Motor Starting, Autotransformator
Perilaku Kekuatan Baja Tulangan Beton Akibat Kebakaran Rahman, Rezky; Kurniawandy, Alex; Fatra, Warman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In general, when a reinforced concrete suffered a fire, a lot of people tend to replace it with anew reinforced concrete, because they assume that the strength of the element structure isalready changing. Though it is possible to keep re-creating the building by recountingstrength structural elements. The purpose of this studywass to know a changing of yield andtensile strength toward concrete-steel reinforced bar after burning at various temperature.Steel reinforced bar used was 13 mm (S13) and 16 mm (S16) in diameter which is the gradewas (BjTS 40) and (BjTS 35), respectively. The yield and tensile strength as receivedcondition of S13 were 432,02 MPa and 583,62 MPa, respectively, and S16 were 369,38 MPaand 514,58 MPa, respectively. The average yield strength of S13 after burning at 600 °C,800 °C, and 1000°C, were 411,78 MPa, 417,80 MPa, and 428,14 MPa, respectively. And thetensile strength of S13 were 563,64 MPa, 568,83 MPa, and 577,83 MPa, respectively. Theaverage of yield strength of S16 were 346,15 MPa, 358,13 MPa, and 362,28 MPa,respectively. And the tensile strength of S16 were 504,94 MPa, 507,05 MPa, and 518,49MPa, respectively. Based on this result, S13 and S16 concrete-steel reinforced bar beforeand after burning were still in the same grade compare to as rechieved. It can be concludedthat the building after fire at a temperature 600 ° C, 800 ° C and 1000 ° C for 1 hour with 2.5cm concrete cover thickness still meet the strength requirements of the building.Keywords: Reinforced Concrete Steel, Yield Stress (fy), Tensile Strength (fu), Burning
Kalibrasi Parameter Terhadap Debit Banjir Di Sub DAS Siak Bagian Hulu Wibowo Suarno Putra; Yohanna Lilis Handayani; Manyuk Fauzi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Upper Siak watershed is increase discharge caused by the land use change. Therefore, this study is aimed to calibrate the parameters of the flood discharge in the upper siak watershed. Various hydrological modeling to calculate the flood discharge have been developed, one of them that is used in this study is the HEC-HMS (Hydrologic Engineering Center-Hydrologic Modelling System). Calibration parameters intended that the flood discharge output HEC-HMS approaching the flood discharge observation. Calibration data input is in the form of daily rainfall data, hourly discharge, and land use maps of 2012. Based on the calibration results showed that the flood discharge has a duration of 3 hours have simulated peak flow value of 70,99 m³/s while the observed peak flow amounted to 71,06 m³/s with a percent difference of 0,1% and the flood discharge duration of 6 hours have simulated peak flow value of 70,60 m³/s while the observed peak flow amounted to 71,06 m³/s with a percent difference of 0,6%.Keywords: land use change, calibration, flood discharge, HEC-HMS
Kalibrasi Satu Dan Dua Parameter Pada Debit Banjir Di Sub-DAS Rokan Menggunakan Program HEC-HMS Permatasari, Yesy Dian; Handayani, Yohanna Lilis; Sutikno, Sigit
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Floods occurred in Rokan Hulu are due to heavy rainfall with fairly long duration and high rainfall. The main difficulty encountered in the analysis of river flooding in Rokan Hulu is due to limited availability of data. An alternative to overcome these limitations is to use a hydrological model. In this research was used as a calibration adjustment process model parameter values to obtain a result of the same model or close observation. This study aims to look at the characteristics of the calibration using rainfall data and flow data hourly to the Transform Method Clark Unit hydrograph and Transform Method Snyder Unit Hydrograph, by using hydrologic Engineering Center Modeling System (HEC-HMS). The best result of the calibration is to use two parameters, the results of two-parameter calibration method Transform Method Clark unit hydrograph has the result Different Percent Percent Peak = 0.0 and Different Volume = -7.67 and methods Transform Method Snyder unit hydrograph have results Different Percent Peak = 0.0 and Different Percent Volume = -23.43. From the results of the calibration is the best method is Transform Method Clark Unit Hydrograph.Keywords: DAS, debit, HEC-HMS

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