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Hengky Luntungan
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Journal : Jurnal Poros Teknik Mesin Unsrat

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APLIKASI METODE ECONOMIC ORDER QUANTITY (EOQ) PADA PERSEDIAAN BBM DI PT. SARANA SAMUDERA PACIFIC BITUNG Veyro E.L Lumempouw; Hengky Luntungan; Charles Chevy Punuhsingon
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 1 No. 1 (2012): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

Supplies have an important role in every company. Supplies would make the company running well. As well as supplies must be provided continually so that the company can operating well and the consumer demand would be fulfilled.The purpose of this research is to determine the model and to design the supplies of diesel fuel at PT. Sarana Samudera Pacific Bitung. Using the EOQ (Economic Order Quantity) formula could minimize the total cost or the overall cost of supplies at the company.From the calculation of the total cost of supplies using the formula, we got a result that the overall cost is Rp. 2.395.785.138,-. The company’s calculation is Rp. 2.403.022.632,-, which means company can save Rp. 7.237.494. It can be concluded that using EOQ formula can minimize the total cost at PT. Sarana Samudera Pacific.Key words: Supplies, Diesel Fuel, EOQ.
LAJU PENDINGINAN PADA MESIN PENDINGIN MENGGUNAKAN R-12 DAN MC-12 Yuyuk Darma Putra K. Sitinjak; Frans Palobo Sappu; Hengky Luntungan
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 1 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

enMost refrigeration system using synthetic refrigeration R-12, R-22, R-134, and R-600a. Synthetic refrigeration has many good characteristics, among others, not easy to burn, no poisoned, and easy to get. However, synthetic refrigeration has negative effects for environment. It can broke  our ozone layer and make global warming. The using of hydrocarbon as refrigerant is one of the solution to handle these problems. An experiment is done using unit SN 1016-1-149-1 cooler machine in mechanical laboratory in Sam Ratulangi University in Manado. Data is taken after completed  the unit preparation. Analysis is done by comparing the cooling rate beetwen R-12 and MC-12. The average cooling rate of R-12 cooler are and respectively using air and water cooling media. In a serial of three experiments, The average electric current used in the unit are 0,75 A and 0,74 for air and water media respectively using of R-12 and Of MC-12 refrigerant . The average cooling capacity of MC-12 is . Then, faund that MC-12 cooler capacity by air and water media is bigger than R-12 cooler capacity by air and water media. Key words : R-12, MC-12, Cooler Speed
SIMULASI NUMERIK ALIRAN FLUIDA DALAM PENSTOCK DENGAN MENGGUNAKAN COMPUTATIONAL FLUID DYNAMICS (CFD) Gilang Ramadhan Supit; Hengky Luntungan; Benny L Maluegha
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 2 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

Indonesia has a potential water power resources that can be generated into electricity through hydro power plant (PLTA) and micro hydro power plant (PLTM). The water from the reservoir flow down to the turbine in a penstock, therefore the analysis of the characteristics of the fluid flow in penstock is interesting. This research worked out with a simulation to find the characteristics of fluid flow in the penstock using Computational Fluid Dynamics (CFD) by applying software GAMBIT 2.3.16 and Fluent 6.3.26. Penstock dimension was using the data available and was simulating to find out the characteristics of the flow. The dominant fluid flow characteristics are static pressure, dynamic pressure, total pressure, fluid velocity and shear stress. Result show that for static pressure in inlet 305.769,9 Pa, default-interior 305.769,9 Pa, wall 305,769,9 Pa and outlet 300.009,8 Pa. The dynamic pressure in inlet 3.595,365 Pa, default-interior 4.253,647 Pa, wall 3.602,503 Pa and outlet 4.229,900 Pa. The total pressure in inlet 309.365,3 Pa, default-interior 309.365,3 Pa, wall 309.365,3 Pa and outlet 304.235,4 Pa. The velocity of fluid in inlet 2,681554 m/second, default-interior 2,916727 m/second, wall 2,684047 m/second and outlet 2,908574 m/second. The shear stress in inlet 5,175604 Pa, default-interior 9,589236 Pa, wall 9,589236 Pa and outlet 9,518271 Pa. Keywords: Penstock, Computational Fluid Dynamics (CFD), Fluid Flow Characteristics
EFEKTIVITAS STEAM EJECTOR TINGKAT PERTAMA DI PLTP LAHENDONG UNIT 2 Brian Deril Kemur; Frans Palobo Sappu; Hengky Luntungan
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 4 No. 2 (2015): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

ABSTRACT First stage steam ejector is a part of the gas extraction system at PLTP Lahendong Unit 2 with the main function to remove non-condensable gas (NCG) collected in the main condenser continuously in order to keep the main condenser vacuum. The research aim is to determine the ability of the steam ejector actual conditions in ejecting NCG from the main condenser. Computational fluid dynamics simulations is used to analyze the flow characteristics in the steam ejector. Simulation is done by comparing the actual conditions and the factory design condition of first stage steam ejectors. Simulation resulting in the efficiency of steam ejector actual condition is 0,527 while factory design condition is 0,554, meaning there is a decrease in the efficiency by 4,87%. The simulation results show the ability of steam ejectors actual condition to eject the NCG from the main condenser is 1.402,11 kg/hr and for steam ejector factory design is 1.479,34 kg/hr. The ability of the steam ejector actual conditions is decreased by 5,22% from the steam ejector factory design conditions. Keywords: Steam Ejector, NCG, Efficiency.
APLIKASI SPREADSHEET PADA PERANCANGAN RODA GIGI LURUS Dirga Tangel; Stenly Tangkuman; Hengky Luntungan
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 5 No. 2 (2016): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

A gear is one of the important elements for transferring motion (especially rotation) and power or energy in a transmission system between the driver and the object to be driven. Gear manufacturing is quite complicated and complex with a variety of size and accuracy depends on the role of the gear itself in a machine. The use of speadsheet application provides advantages for designers where the design process becomes easier. Spreadsheet is an interactive computer application program to organize and analize data in tables. This paper presents an application of spreaddsheet that has been made for designing a spur gear. Keywords: design, spur gear, spreadsheet
ANALISIS DEFLEKSI AKIBAT BEBAN ANGIN PADA BEJANA TEKAN VERTIKAL DI KELURAHAN SAGERAT KOTA BITUNG Farrell S Kiling; Stenly Tangkuman; Hengky Luntungan
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 5 No. 2 (2016): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Nowdays, the industry plays a vital role in the economy; therefore design of an efficient plant industry is very important. There is a component for handling a pressurized fluid, such as a pressure vessel. The purpose of this study was to determine the maximum deflection occurs at a vertical pressure vessel due to wind loads, and obtains maximum height of pressure vessels based on the allowable deflection. The object of this research is in Bitung. Bitung is one of the industrial cities located in the Province of North Sulawesi. Wind velocity was obtained from BMKG Bitung Maritime Station. Analysis of deflection applied to pressure vessel which has height of 25 ft to 150 ft. The results showed that the higher the pressure vessel, the higher the deflection. The maximum deflections for height of 25 ft to 150 ft have been determined. Furthermore, based on allowable deflection, the allowable height of the pressure vessel in Sagerat Village-Bitung City is 147.44 ft. Keywords         : Wind Load, Pressure Vessel, Deflection, Bitung
ANALISIS BEBAN PENDINGINAN PADA RUANG PENYIMPANAN PRODUK PERTANIAN UNTUK SULAWESI UTARA DENGAN MENGGUNAKAN SISTEM REFRIGERASI BERTINGKAT Yosua A P Tondok; Hengky Luntungan; Benny Lokombanua Maluegha
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 6 No. 1 (2017): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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This research aims to calculate the cooling load in cold storage of some agricultural products: potatoes, tomatoes, and peppers; to calculate the compressor’s power that is used on the cold storage with three types of multistage compression system: two compressors – three evaporators system (type 1), one compressor – three evaporators system (type 2), and two compressors – one evaporator system (type 3) for each agricultural products; and to analyze the calculated compressor’s power to determine the most efficient refrigeration system.Based on the calculation’s results, it is found that the cooling load of potatoes is 295.438,28 Btu/hour, tomatoes 247.261,38 Btu/hour, peppers 300.281,36 Btu/hour, and the total cooling load of the three agricultural products is 841.981,02 Btu/hour. By using multistage compression system, it is obtained that the compressor’s power of type 1 is 106,15 hp, type 2 108,55 hp, and the type 3 212,03 hp that consists of type 3a is 75,55 hp, type 3b 59,44 hp, and type 3c 77,04 hp. Keywords: cooling load, multistage compression system, compressor’s power
SIMULASI KINEMATIKA MEKANISME LENGAN BACKHOE EXCAVATOR Ginanjar Mustofa; Stenly Tangkuman; Hengky Luntungan
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 7 No. 1 (2018): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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                In the modern era as now required a fast and efficient calculation method which is usually done by simulation method. The software used in this simulation is SolidWorks 2016. SolidWorks is a parasolid based solid modeling, and uses a parametric-based approach to modeling and assembly. Parameters refer to restrictions that are valuable to determine shape or geometry of the model.               Based on this in this research will be kinematics simulation, where the result of simulation covering the whole workspace on excavator arm. The object research is a Backhoe Excavator arm mechanism of Hitachi ZX-type ZX-200. The purpose of this study was to determine velocity, tangential acceleration, and normal acceleration in excavator arm mechanism.               The maximum velocity of boom bar is 2948.82 mm/s which occurs when the boom angle is at 16.64° (t = 3.83s) or at the minimum angle of the workspace. The boom velocity simulation results have also been validated by hand calculation, maximum tangential acceleration is 2430.12 mm/s2, and the maximum normal acceleration is 3705.11 mm/s2. The maximum velocity of arm shaft is 1778.06 mm/s which occurs when the angle of arm rod is at 140.86°, maximum tangential acceleration is 4594.03 mm/s2, and the maximum normal acceleration is 6665.24 mm/s2. The maximum velocity of bucket rod is 473.61 mm/s, maximum tangential acceleration is 90.09 mm/s2, and maximum normal acceleration is 297.89 mm/s2. Keywords: Kinematic Analysis, Arm Excavator, Hitachi ZX-200.
PERHITUNGAN BEBAN PENDINGIN PADA RUANG SIDANG FAKULTAS TEKNIK UNSRAT Vernando V Sasuang; Frans P Sappu; Hengky Luntungan
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 7 No. 1 (2018): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

Air conditioning is a cooling system where heat is transferred from the room to the atmosphere. In conducting activities in the room humans require conditions comfortable, the temperature or the humidity of the air in the room. To achieve comfortable conditions in a room, it is necessary to do air conditioning by using a cooling machine so that comfortable air can be obtained. Meeting Room of Faculty of Engineering Sam ratulangi University is often used as a place to carry out various activities, thus requiring cooling system. In this final project a calculation is performed to determine the peak cooling load and then determine the capacity of the cooling machine used to cool the room.From the calculation results obtained by the peak cooling load on the room = 125.301,3 BTU/jam. If using an Air Conditioning (AC) engine with 2 PK, then AC is required during peak load in the room as much as 7 units Keywords: Air conditioning, Cooling load, Cooling machine
SIMULASI DAN PEMODELAN TURBIN ANGIN TIPE DARRIEUS DENGAN KONFIGURASI ROTOR TIPE H UNTUK PEMBANGKIT LISTRIK TENAGA BAYU SKALA MIKRO Alexander Widodo; Stenly Tangkuman; Hengky Luntungan
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 8 No. 1 (2019): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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The purpose of this study was to obtain the results of modeling and simulation for H-Darrieus wind turbine with straight blades. There are two approaches used in this study, namely hand calculation and software analysis. The calculation and analysis employed wind speed data of Manado City. Before applying software analysis, the data is processed to obtain the lift & drag forces that occur in turbine blades and other forces acting on wind turbines. Furthermore, the results of hand calculations and software analysis are compared so that the results of modeling and simulation are validated.The average counted-power of turbine is 181,81 watts, the wind turbine diameter is 2260 mm, and the wind turbine height is 2350 mm. The lift force is 143,257 N & the drag force is 3,978 N which is based on the attack angle 8,95, and the maximum Von Mises stress in the wind turbine is 184,96 MPa. Therefore, the wind turbine would not fail because the maximum stress that occurs in the structure is smaller than allowable stress of the material.Finally, the results of the modeling and simulation for the H-Darrieus wind turbine with straight blades are successfully obtained. The output of this research is turbine design drawings.Keywords: Darrieus Wind Turbine, Modelling, Simulation, Lift & Drag Force
Co-Authors Alexander Widodo Andries Reff Onsu Anise, Novellia Arwanto Lakat Benny L Maluegha Benny L. Maluegha Benny Lokombanua Maluegha Benny Maluegha Brian Deril Kemur Brian Deril Kemur, Brian Deril Charles Chevy Punuhsingon Dirga Tangel Farrell S Kiling Frans P Sappu Frans P. Sappu Frans Palobo Sappu Gilang Ramadhan Supit Ginanjar Mustofa Gredio Lewu I Nyoman Gede Jotje Rantung Kiling, Farrell S Lakat, Arwanto Lewu, Gredio Michael Rembet Monintja, Nita C.V. Mustofa, Ginanjar Nita C.V. Monintja Novellia Anise Onsu, Andries Reff Sappu, Frans P. Sasuang, Vernando V Stenly Tangkuman Tangel, Dirga Tondok, Yosua A P Vernando V Sasuang Veyro E.L Lumempouw Widodo, Alexander Yosua A P Tondok Yuyuk Darma Putra K. Sitinjak