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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains JET (Journal of Electrical Technology) Jurnal Surya Teknika Tadulako Master Law Journal Jurnal Riset Teknologi Pencegahan Pencemaran Industri Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Bhakti Nagori (Jurnal Pengabdian kepada Masyarakat) SAINSTEK BATOBO: Jurnal Pengabdian Kepada Masyarakat
Romy Romy
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Other

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Analisa Energi Furnace 101-H-2 Paska Turn Arround 2017 Pertamina Refinery Unit II Sei. Pakning Dian Putra Satria; Romy Romy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Furnace is a heating equipment for petroleum processing, which requires the largest operational costs in the processing business. During the first quarter of 2019 Pertamina II of the total raw materials used amountedto 10.16% for processing energy needs of which 75% of the energy consumed by the furnace. Furnaces that are operated with optimal conditions will result in savings in operational costs. Analysis of furnaces has been carried out by analyzing energy efficiency after Turn Around in 2019 and comparing it with data before Turn Around in 2017. As a result, efficiency was obtained after Turn Around in 2019 by 97% and before Turn Around in 2017 at 68% -75%. It was known that when TA-2017 has been carried out a total replacement of tubes,castables, and stacks or repairs of the mayor. Meanwhile, when TA-2019 was carried out repairs and cleaning or minor repairs.Keywords: furnace, energy. efficiency, crude oil, residue
Pengaruh Variasi Putaran mesin, Komposisi Campuran Bioetanol Dan Tipe Vacuum Tube Terhadap Komsumsi Bahan Bakar Dan Komposisi Gas Buang Pada Motor Bakar Bensin Empat Langkah Satu Silinder Agus Setiawan; Romy Romy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Experimental study on the installation of a vacuum tube in intake manifold has been done by observation at the effect of variations engine rotation and composition of bioethanol mixture with regard to fuel consumption and exhaust gas composition. This study used fuel E20, E30 and E40, the type of vacuum tube 4Y2 and Posh. Tests carried out on variations of the engine rotation 3000, 3500, 4000, 4500 and 5000 rpm. As result fuel consumption tends to increase as increasing engine rotation, it is more efficient with increasing ethanol in the fuel mixture and use a vacuum tube, the most efficient happened on fuel E40 with the installation of a vacuum tube type Posh in engine rotation 3000 rpm with consumption 0,21 L/hour. CO exhaust gas tends to decrease with increasing engine rotation, the ethanol in the fuel mixture with the installation of a vacuum tube, the lowest occurred on fuel E40 with installation a vacuum tube type Posh in engine rotation 5000 rpm with emission 0,06 %. CO2 tends to increase with increasing engine rotation, the ethanol in the fuel mixture and the installation of a vacuum tube, the highest on fuel E40 with a vacuum tube type Posh in engine rotation 5000 rpm with emission 13,60 %. HC tends to decrease with increasing engine rotation, the ethanol in the fuel mixture and the installation of a vacuum tube, the lowest occurred on fuel E40 with a vacuum tube type Posh in engine rotation 5000 rpm with emission 90 ppm.Keywords: Bioethanol, Exhaust Gas, Vacuum Tube
Kaji Eksperimental Pengaruh Subtitusi Etanol Pada Biosolar B20 Terhadap Kinerja Mesin Diesel Teddi Febriardi Mulia; Romy Romy; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The scarcity of fuel has led to research is done to develop and utilize renewable fuel sources such as ethanol. The purpose of this study was to obtain and compare the performance of a Diesel Engine using B20 biosolar fuel and a Biosolar-Ethanol mixture. The alcohol compound used was 96% ethanol and mixed according to the different composition. The performance characteristics are carried out by testing diesel engines at a constant speed of 2100 rpm and load varied from 350 W, 700 W, 1000 W, 1350 W, 1700 W, 2000 W, 2350 W, 2700 W, and 3000 W. From the experimental results, the performance of diesel engines with ethanol substitute fuel has not changed in power, torque, and bmep. The thermal efficiency of biodiesel was 18.23% and the thermal efficiency of the 5% ethanol mixture was 15.74%, in the mixture of 10% by 16.90%, in the mixture of 15% at 20.16% and in the mixture of 20% by 20.11%.Keywords: Ethanol, biosolar, diesel engine, performance
Studi Eksperimen Optimasi Sudut Pengapian Terhadap Daya Pada Motor Bakar 4 Langkah 1 Slinder Dan Rasio Kompresi 9:1 Dengan Variasi Campuran Bensin Premium Dan Bioetanol Irwandi Trinov; Romy Romy
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

Currently the amount of fuel in Indonesia is increasingly depleted especially gasoline fuel, so it is feared in the future the amount of gasoline will be depleted out and exhausted. To overcome these problems, it needs an alternative fuel, one of which is bioethanol. Bioethanol can be mixed with gasoline so it can save the use of gasoline. Most of the vehicles owned by middle to lower class society are motorcycles, which use carburetors as their fuel distribution, where the efficiency is smaller than the FI technology. The first objective of this study was to determine the maximum effective braking power, Specific Fuel Consumption (SFC) and thermal braking efficiency of each variable. The second objection is to find out the optimal angle at the concentration of bioethanol and premium gasoline mixture on the machine. The research method used is experimental method with variable of ignition angle and concentration of bioethanol and gasoline mixture. With the result, the maximum effective braking power on E20 fuel, 20o angle before TMA with 4000 rpm shaft speed of is 191.792 Watt, minimum SFC on E10 fuel, 15o ignition angle before TMA with 2000 rpm shaft rotation of 4.93 x 10-7 kg / J and the maximum thermal braking efficiency on E10 fuel, the ignition angle of 15o rotation shaft of 2000 rpm is 4.8%.Keywords: fuel distribution system, bioethanol, ignition angle
Studi Eksperimen Optimasi Sudut Pengapian Terhadap Daya Pada Motor Bakar 4 Langkah 1 Slinder Dan Rasio Kompresi 9,5:1 Dengan Variasi Campuran Bensin Premium Dan Bioetanol Ahmad Nur Rokman; Romy Romy
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

Currently, the amount of fosil fuel in Indonesia is forecast limited, so that in the future will be likely fuel oil depletion that lead to increase the its price. Therefore, it is urgently to look for other alternative of fuel oil sources. Indonesia has a renewable alternative of fuel source that is bioethanol. The bioethanol can be blended with gasoline to improve the performance on gasoline. The purpose of this study is to determine the optimum angle for different concentrations of a mixture of ethanol and gasoline to produce optimal engine work. In this study, the effects of using unleaded gasoline (E0) and unleaded gasoline–ethanol blends (E10, E20,E30, E40 and E50) on engine performance. The investigation was conducted on a Suzuki Shogun 125 R single-cylinder, four-stroke, spark ignition engine. The experiments were performed by varying the ignition angle (150, 200 and 250) and speed of the crankshaft (2000 rpm, 3000 rpm and 4000 rpm). A result for the maximum effective braking power was on E20, the ignition angle of 20 degrees before TDC (Top Dead Center) at the crankshaft speed of 2000 rpm that was 156.284635 Watt, minimum SFC (Specific Fuel Consumption) was on E10, the ignition angle of 15 degrees before TDC, at the crankshaft speed of 2000 rpm that was 5.63 x 10 -7 kg / J. The thermal of maximum braking efficiency was on the E10, the ignition angle of 15 degrees before TDC at the crankshaft speed of 2000 rpm was 4.2%.Keywords: Internal Combustion Engine, Bioethanol, Ignition Angle
Analisis Exergoeconomic Gas Engine Siklus Miller Dengan Bahan Bakar Biogas Berbahan Baku POME Ahmad Hasnul Fajri Arsyah; Romy Romy; Iwan Kurniawan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Many alternatives have been made to Minimalized energy usage. One of them performs exergy analysis and exergoeconomic analysis. This concept of analysis, not only taking into account the quantity of energy but also the quality of the energy (the second law of thermodynamics). Exergoeconomic analysis, is an analysis that combines the exergy analysis with an economic approach (cost). Exergoeconomic analysis was done by taking data at PLTBg Tandun. The analysis was initiated by conducting economic analysis. Analyses conducted to figure out the total value of the waste from the Diesel PLTBg per year and the price of electricity/kWh. There ware 3 aspects of costs that we calculated cost of investment, operational maintenance fix costs, (employee salaries and benefits), and the operational maintenace. Of the each variable cost value were, the investment costs $0.016/kWh, for to investment cost $0.030/kWh, OM Fix the cost $0.009/kWh variable OM. The value of total cost loss for gas engine due to the destruction of the first period exergy is $7.116/hour, They are cost of losses for each component is the fuel space worth $7.09/hour, for combustion chamber, $0.043/hour, for compressor, $0.033/hour for turbocharge. While total cost loss value due to destruction of exergy the second period is $5.626/hour. They were of losses for each component is the fuel space worth $5.22/hour, compressor $0.393/hour, turbocharge $0.013/hour. Keywords: exergy, exergoeconomic, gas engine, biogas
Analisa Penerapan Total Productive Maintenance (TPM) Pada Unit Pembangkit Turbin Gas Yang Berada Di Tanjung Datuk Riau Muhammad Razak Tuara; Anita Susilawati; Romy Romy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This research aims to analyze a turbine machine of gas power plant in Tanjung Datuk, Riau by using Overall Equipment Effetiveness (OEE), which one of tool of TMP method to increase effectiveness, to improve the function and performance of machine/ equpment. To analyse of OEE values were calculated the value of availability rate, performance rate and quality rate that can used to eliminating six big losses in machine/equipment. The research methodology was collection OEE data, calculation of six big losses. Mean Time to Failure (MTTF) and Mean Time to Repair (MTTR) then statistical analyse of OEE and six big losses.MTTF and MTTR data using index of fit . From the OEE calculations obtained on the gas turbine engine was stillbelow world class (66.89%) and the target at company (90%). From the analysis of of six big losses known to affect the low value of OEE gas turbine engine that was reduce speed losses. The calculation of index of fit value of MTTF on gas turbine blade was 1,008.86 hours (42 days) and MTTR value of 1.37 hours. Therefore it would be advantage to the company in this case study to implement the pillars of TPM such as planned maintenance and autonomous maintenance to improve the effectiveness and performance of gas turbine engine for stability in supplying electricity.Keywords : Overall Equipment Effectiveness (OEE), TPM, Six Big Losses, MTTF, MTTR.
Kaji Eksperimental Pengaruh Temperatur Pada Campuran Bahan Bakar Biosolar Dan Ethanol Untuk Kinerja Mesin Diesel Dong Feng Hendinto Simanihuruk; Romy Romy; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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Abstract

Biodiesel fuel and ethanol are fuels that have been used in diesel engines. In this study, the focus was on the effect of temperature on a mixture of biodiesel fuel and ethanol on the performance of diesel engines, Feng to be used as an electric generator. The test equipment used is a dong Feng diesel engine in the University of Riau mechanical engineering laboratory. Testing of diesel engines is carried out with constant rotation and constant voltage. Comparison of fuel mixtures used Biosolar (B20) 95% with 5% ethanol, Biosolar (B20) 90% with 10% ethanol and Biosolar (B20) 85% with 15% ethanol in 1000 ml with variations in temperatures of 50oC, 60oC and 70oC and loading 1000 watts, 2000 watts and 3000 watts. The results showed that the performance of the Dong Feng diesel engine for using electric generators with biodiesel 95% and 5% ethanol in 1000 ml increased the effective power, torque and brake mean effective pressure by 5.88% compared to only using biodiesel. The effect temperature on the mixture and biosolar and ethanol fuel are fuel consumption, thermal efficiency and air and fuel ratio in the biodiesel mixture of B20 95% and 5% ethanol with a temperature of 60oC which increased 5.06% compared to biodiesel. But the increase in effective power, torque and speed increased.Key word : diesel engine, biosolar, ethanol, temperature, viskosity
Analisis Energi Pembangkit Listrik Tenaga Uap (PLTU) Dual Fuel Line 2 Pt Riau Andalan Pulp And Paper (RAPP) 100 MW Pangkalan Kerinci Samuel Siregar; Romy Romy; Awaludin Martin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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The Steam Power Plant is one of the largest electric energy provider in Indonesia. In general, the performance of a power plant was evaluated by using the first law of thermodynamics (conservation of energylaw). The first law of thermodynamics only examined the quantity of energy consumption. The purpose of this study is to analyze the work of components, incoming heat, and also nett work from the system so that the energy value of the system is obtained in the form of energy efficiency from the cycle of PT RAPP's 100 MW Steam Power Plant. From the results obtained, pump I work is 0.0047 MW, followed by pump II 1.35 MW, heat is198.27 MW, turbine work is 87.09 MW, and net work is 85.73 MW, so thermal efficiency at PT RAPP steam power plant is 43.24%.Keywords : steam power plant, energy, thermal efficiency
Analisis Energi Gas Engine Siklus Miller Dengan Bahan Bakar Biogas Berbahan Baku POME Atikah Purwantari; Romy Romy; Iwan Kurniawan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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The Biogas Power Plant comes with a form of alternative energy handling efforts originating from POME Because of the engine is continuously operated without stopping, it requires maintenance so that the engine's performance is maintained properly. The decrease in engine performance produces wasted energy so that engine efficiency is not optimal. In addition, the maintenance process takes a long time until the engine can be operatedagain. This is a problem because the maintenance process is carried out on all cylinder engines. The purpose of this study is to calculate and analyze the energy on the left and right exhaust on the gas engine Guascor SFGM 560 Miller Cycle. From the analysis, the biggest energy efficiency is in the left cylinder in the first period which was59.82% at 15.00 PM. and as a comparison in second period the highest efficiency is at 12.00 that was equal to 66.45%.Keywords: miller cycle, biogas, gas engine, energy, effisiensi energy
Co-Authors Ahmad Hasnul Fajri Arsyah Ahmad Nur Rokman Ahmad Syaifudin Ali, Nurhalim Dani Ali, Nurhalim Dani Ali Amir Hamzah Amir Hamzah Anak Agung Gede Sugianthara Anisa Yulvi Azni Anita Susilawati Aris Freddy Atikah Purwantari Awaludin Martin Binsar Martua Parulian Manurung Dedy Masnur, Dedy Dian Putra Satria Farhan, A Feblil Huda Ginting, Yogie Rinaldi Halal Putra Purba Hendinto Simanihuruk Hendri Manogu Pranata Sitanggang, Hendri Manogu Pranata Heri Siswanto Hutabalian, Ronaldi Hutabarat, Bijujent Irwandi Trinov Iwan Kurniawan Jatwoko, Jatwoko Laksono Trisnantoro Lehet Rikardo Pandiangan Mitrodono H L Gaol Muhammad Razak Tuara Nazaruddin Nazaruddin Noveri Lysbetti M Nurjaman, Jajang Putri Nawangsari, Putri Risnawati, Kinkin Rosma, Iswadi Hasyim Samuel Siregar Sembiring, Ferdinandus Extranta Suwitno Suwitno, Suwitno Teddi Febriardi Mulia Walter Valentino Sinaga Winanda, Muhammad Valdi Yohanes Yohanes Yohanes Yohanes Z Zulfansyah Zuchra Helwani