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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Tadulako Master Law Journal
Romy Romy
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Engineering Law, Crime, Criminology & Criminal Justice

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Analisis Energi Gas Engine Siklus Otto Kapasitas 835 KW Syaifudin, Ahmad; Romy, Romy; Martin, Awaludin
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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Biogas from Palm Oil Mill Effluent (POME) is one of renewable energy resources that can be used to reduce theuse of fossil energy in satisfying the electricity needs. At biogas power plant, gas engine is an importantcomponent which functions to convert the energy contained biogas into mechanical energy to drive the electricgenerator. Because of its important function, the performance of the gas engine needs to be maintained in orderto remain well operated. In addition to maintaining the performance of gas engine, steps in improving theefficiency of gas engine energy usage also need to be done in order to become more efficient. Efficiency of thegas engine depends on the overall efficiency of cylinders gas engine in order to convert the energy of fuel intowork. Energy analysis is needed to know the efficiency of multi-cylinder gas engine at biogas power plant, so itcan be known the gas engine performance and can be used for further analysis in increasing the efficiency of theuse of renewable energy sources (biogas) in gas engine. The purpose of this research was to know the energy orthermal efficiency of gas engine. Variables used in the analysis were a composition of biogas, flow rate ofbiogas, a temperature of gas mixture entering the gas engine and temperature of exhaust gas. The energyanalysis result showed that the efficiency of all cylinders varies and the greatest energy or thermal efficiency ofgas engine is on 5th and 10th cylinder (56.29%) and lowest in 8th cylinder (56.17%). The average energy orthermal efficiency of gas engine is 56.23%.Keyword : Biogas, Biogas Power Plant, Gas Engine, Otto Cycle, Energy Analysis
Analisa Mesin Generator Pada Sistem Pembangkit Listrik Tenaga Gas Menggunakan Metode Total Productive Maintenance (TPM) (Studi Kasus : PLTG Tanjung Datuk, Pekanbaru) Nurjaman, Jajang; Susilawati, Anita; 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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The gas power plant in Tanjung Datuk has been required in optimal condition, because it has crucial role to supply electricity for Pekanbaru areas. This research purposed to analyze and evaluate the performance of generator machine at gas power plant in Tanjung Datuk. There are two generator machines that always operate for 24 hours, so the maintenance of these machines has been essential to applied. One of maintenance approach is the Total Productive Maintenance (TPM). In this research, the TPM tool to measure effectiveness machine of generator used Overall Equipment Effectiveness (OEE), continued to analyze the OEE six big losses. After that, calculation of Mean Time To Failure (MTTF) and Mean Time To Repair (MTTR) to know the lifespan or maintenance on generator machine especially on AVR (Automatic Voltage Regulator) component. The results were obtained the OEE value rate of 63.98%, the value of MTTF and need to be treated every 1,688.17 hours, while for the MTTR value of 1.831 hours. To improve the effectiveness of the generator machine has done the maintenance in accordance with the appropriate schedule and implementation of the TPM approach.Keywords: OEE, Generator, TPM, Mean Time To Failure ( MTTF) dan Mean Time To Repair (MTTR).
Analisis Exergy Mesin Gas Pusat Listrik Pltmg Balai Pungut 7 X 15 Mw Risnawati, Kinkin; Romy, Romy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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PLTMG have an efficiency increase of between 30-50%. This value is still not optimal because the utilization is less efficient. The engine is more often operated, the engine need maintenance for better performance. The decrease inengine 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 operated again. This is a problem because the maintenance process iscarried out on all cylinder engines. The purpose of this research are for calculating, analysing and testing of exergy destroyed in the cylinder unit of the Balai Pungut PLTMG gas fuel unit 4. From the analysis, the biggest efficiency ofenergy is before overhaul which is 46,3 %.Keywords : dual fuel, energy, exergy, engine, efisiensi energy
Pemanfaatan Limbah Cair Pabrik Pengolahan Kelapa Sawit Sebagai Perekat Pada Pembuatan Briket Dari Arang Pelepah Kelapa Sawit (Elaeis Guineensis Jacq) Sitanggang, Hendri Manogu Pranata; Romy, Romy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Waste of fronds is solid palm oil waste generated from palm oil plantations. To increase the value added, then this waste can be utilized as charcoal briquettes that can be used as an alternative energy source. The purpose of this study were (1) to know proximasi briquettes from palm fronds with adhesive wastewater CPO (Crude Palm Oil), (2) determine the resistance (durability) briquettes palm fronds with CPO adhesive liquid waste, (3) determine the calorific value contained in briquettes midrib palm oil CPO adhesive liquid waste, (4) determine the length of time the use of briquettes in water heating compared with a stove. This study used an experimental method, the object is to use waste oil palm fronds which uses wastewater from the processing of the PKS as an adhesive. By comparison wastewater PKS and palm fronds charcoal that is 30%: 70%, 35%: 65%, 40%: 60%, 45%: 55%, 50%: 50%, 55%: 45%, 60%: 40%, 65%, 35% and 70%: 30%. Based on the research results, obtained the best calorific value contained in the particle size of 50 mesh with the average value of 29176,921 J / g.Keywords: Waste oil palm fronds, charcoal briquettes, endurance (durability), calorific value.
OPTIMALISASI PENYELIDIKAN KASUS PENCURIAN KENDARAAN BERMOTOR DALAM MENINGKATKAN PENGUNGKAPAN TINDAK PIDANA DI KOTA PALU Romy, Romy
Tadulako Master Law Journal Vol 5, No 2 (2021): JUNE
Publisher : Universitas Tadulako

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 The research in this thesis is motivated by the observations of researchers on the data of vehicle theft in the city of Palu, which continues to increase every year, even the crime of motor vehicle theft is one of the crimes that often occurs in the city of Palu. As a person directly involved in the process of handling these criminal acts, the author feels he has a great responsibility to think about efforts to optimize the handling of cases of motor vehicle theft. The process in the criminal justice system that begins in the investigation process makes the writer interested in observing and analyzing a model that can be used as an optimization effort, so that quickly and carefully the theft of the motor vehicle can be resolved. For this reason, this study uses sociological or empirical juridical methods. The formulas raised are: 1) What is the Effort to Optimize the Investigation of Motor Vehicle Theft Cases in Palu City? 2). What is the Investigation Model that can reduce the number of cases of Motorized Vehicle Theft in Palu City? The results obtained from this study and answer the problem formulation that the Efforts to Optimize the Investigation of Motor Vehicle Theft Cases in the City of Palu, have not run optimally in accordance with the wishes of law enforcement officials. Internal efforts made in the form of using the Cyber system only apply to tracking the whereabouts of the perpetrators via mobile phones and this is certainly inaccurate because it could be that the perpetrator's position is already in great distance from the vehicle. External efforts are also the elements of related agencies and elements of society to make the need for a lot of time and energy to get information on the whereabouts of the perpetrators and the vehicle of fraud. The Investigation Model that can reduce the number of cases of Motorized Vehicle Theft in Palu City is through a Cyber System called "GPS On ROAD". This system works independently allowing the police to track motorized vehicles
Perancangan Wadah Perebusan Bakso Ikan Dengan Daya 1000 W Lehet Rikardo Pandiangan; Romy Romy; Nazaruddin Nazaruddin
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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The development of a country coupled by the economic growth of its people, the example of a small economy is small and medium enterprises. The development of small and medium enterprises needs to be considered in line with economic growth. One of the small and medium business units in Riau is the fish meatballs processing. In the process of fish meatballs boiling have a convection heat transfer process between water and fish meatballs and conducting in a sphere of meatballs. The purpose of this research was to design the vessel of boiling fish braid container with 1000 W power capacity with automatic temperature control system. Based on the results of the study produced dimension 78 × 20 × 25 cm thickness of 1.4 mm plate and stiffeners. The result of the test result is 2.5 hours and is actually 1 hour 20 minutes. The boiling time of meatballs with size 3.1 cm is 15 minutes theoretically and 4.6 minutes onaverage from test result. The total mass of processed meatballs is 3.12 kg with total wheat balls of 163 grains.Safety factor that obtained by using software ANSYS Workbench V15.0 is 1.6.Keywords: design boiling vessel, heat transfer conduction transient, safety factor.
Analisis Energi Pembangkit Listrik Tenaga Uap (PLTU) Dual Fuel Line 3 PT. Riau Andalan Pulp And Paper Pangkalan Kerinci Aris Freddy; 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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The Steam Power Plant (PLTU) plays a major role in the supply of electricity in Indonesia today. In general, the performance of the power plant is evaluated by using the first thermodynamic law (energy conservation law). For this reason, energy analysis is based on the first law of thermodynamics which can be studied more deeply about the amount of energy in each component of the power plant. The purpose of this study was to analyze the amount of energy in each component in the dual fuel line 3 steam power plant PT. Riau Andalan Pulp and Paper Pangkalan Kerinci. The results showed that the energy value at pump I was (0.006 MW) followed by pump II (2.219 MW), Steam Turbine (88.719 MW), boiler (258,019 MW) and condenser (76.83 MW). Thermal efficiency of the whole system was 33.52%. Keywords: energy analysis, thermal efficiency, biomass
Kaji Eksperimental Pengaruh Temperatur Campuran Bahan Bakar Biosolar B20 Dan Crude Palm Oil (CPO) Terhadap Unjuk Kerja Mesin Diesel Halal Putra Purba; 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 purpose of this research was testing the performance of diesel engines using a mixture of B20 biodieselfuel which commercialized in Indonesia and crude palm oil with a ratio of 95: 5, 90:10 and 85:15 respectively anda pre-heating process for mixtures is carried out. Fuel temperature was varied with 60℃, 75℃ and 90℃ before injection into the combustion chamber and compares the test data with pure B20 biosolar fuel. The performance of a diesel engine showed that by using a fuel mixture there was no significant change in the amount of effective power,torque and BMEP at constant rotation. Specific fuel consumption using a mixture of fuel without preheating process has decreased compared to using pure B20 biodiesel diesel fuel while efficiency increases. SFC value of fuel mixture with preheating process was smaller than the mixture of fuel without preheating but the thermal efficiencyincreased. The ideal temperature of the fuel mixture is 75oC for each mixed variation.Keywords: Diesel engines, biodiesel, performance, pre-heating, crude palm oil
Simulasi CFD Gasifikasi Pada TWO Stage Gasifier Tipe Venturi Klasik Dengan Bahan Baku Tandan Kosong Sawit Mitrodono H L Gaol; Romy Romy; Zulfansyah Zulfansyah
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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Biomass gasification is a very complex thermo chemical process which involves the reaction of a chemical reaction. The purpose of this study was to determine the reactor dimensions as a reference in making a gaifier made from empty fruit bunches by obtain optimum working conditions and simulate CH4, CO, dan H2 pruducts in the reactor by varying the amount and position of air entering the reactor. This researh utilized software GAMBIT 2.4.6 for meshing and boundary identification and FLUENT 6.3.26 for simulation. Mass flow rate of feed empty fruit bunches waste in the simulation was 10 kg/jam with variations of air equivalence ratio ie 0.2, 0.25, 0.3 and the number of nozzles 2,3 and 4. From the simulations results, the highest combustible gas was obtained when the variable of ER value = 0.3 and number of nozel 2 ie CO = 18.53 %, H2 = 0.9 % and CH4 = 0.0365 % with HHV = 24.85 kJ/Nm3.Keywords : Empty Palm Bunches, Gasification, CFD, FLUENT
Kaji Eksperimental Penggunaan Biosolar B40 Terhadap Unjuk Kerja Mesin Dengan Menggunakan Variasi Tekanan Pengabutan Pada Nosel Walter Valentino Sinaga; Romy Romy; Zuchra Helwani
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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Biodiesel is an alternative fuel that can be used to replace fossil fuels such as Diesel, which are increasingly depleting. Biodiesel has a higher viscosity, density, and surface tension value than conventional fossil fuels. The level used by the Indonesian government is 20-30% Biodiesel content, which is then added with Diesel fuel. If the percentage level of Biodiesel is increased, there are several ways that can be used to improve engine performance, one of which is to adjust the fogging pressure. This study aims to determine the effect of increasing fuel injection pressure on diesel engine performance using Biosolar B40. The research was carried out by means of a diesel engine operated at a constant rotation of 900 rpm, and given a load of 2,500 kg/m2 to 15,000 kg/m2. To improve fuel atomization, the authors change the fogging pressure by rotating the adjusting screw contained in the fuel nozzle and then tested using an injector tester so that the pressure values are 110 bar, 120 bar, 130 bar, 140 bar, and 150 bar. The calculated parameters include Δh on the orifice, the volume of fuel used, fuel consumption time, and engine rpm. In the tests conducted, it was found that variations in injection pressure have an effect on engine performance parameters such as effective shaft power, brake mean effective pressure, thermal efficiency values, air fuel ratio, and specific fuel consumption which are better than standard pressure. Where for the best engine performance value at an injection pressure of 150 bar, with an effective shaft power of 3,775 kW at a maximum load of 15,000 kg/m2, the greatest value of bmep at a load of 15,000 kg/m2 is 665.415 N/m2, the best thermal efficiency at a load of 12,500 kg/m2 is 89.902 %, for a better air and fuel ratio with a value of 212.852 at a load of 2,500 kg/m2, and the smallest specific fuel consumption with a value of 0.0000235 kg/kW.s at a load of 12,500 kg/m2. Keywords: Injection Pressure, Biodiesel, B40, Engine Performance
Co-Authors Ahmad Hasnul Fajri Arsyah Ahmad Nur Rokman Ahmad Syaifudin Anak Agung Gede Sugianthara Anita Susilawati Anita Susilawati Aris Freddy Atikah Purwantari Awaludin Martin Binsar Martua Parulian Manurung Dian Putra Satria Halal Putra Purba Hendinto Simanihuruk Hendri Manogu Pranata Sitanggang, Hendri Manogu Pranata Irwandi Trinov Iwan Kurniawan Laksono Trisnantoro Lehet Rikardo Pandiangan Mitrodono H L Gaol Muhammad Razak Tuara Nazaruddin Nazaruddin Nurjaman, Jajang Risnawati, Kinkin Samuel Siregar Teddi Febriardi Mulia Walter Valentino Sinaga Yohanes Yohanes Z Zulfansyah Zuchra Helwani