Claim Missing Document
Check
Articles

Found 39 Documents
Search

Study on Pressure Distribution in the Blade Passage of the Francis Turbine Sutikno, Djoko; Soenoko, Rudy; Pratikto, Pratikto; PT, Fery Putra; Nur Cahyo, Ponco Muchamad
Jurnal Rekayasa Mesin Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (308.558 KB)

Abstract

Pressure distribution along a series of guide and runner blade passages of the Francis turbine are useful to be known in order to predict flowing water pressure through the passages whether the pressure under the vapor pressure or not. Furthermore, when at any section of the passages the water pressure under the vapor pressure a cavitations will occur. In this study, the pressure of flowing water throughout the blade passages were measured at four sections along the passages by using four mercury deflection manometers and conditions of the flowing water were recorded by using a stroboscope and camera. The turbine was operated at 5 different heads with the same guide blade openings. Water pressures at the inlet and outlet turbine were measured by a Bourdon manometer of each. The flow rates were measured by using an orifice plate equipped with a mercury deep well manometer. The forces were measured by using a prony brake and turbine rotations were detected by using a digital tachometer. The result of the research state that head drop on the guide and runner blades, and turbine efficiency changing as the head, flow rate and turbine speed changed. The head drop on the runner was greater than that on the guide blade. Cavitations were not occoured because the lower pressure along the passages were still higher than vapor pressure. Water pressure decreased from the guide blade inlet to the runner outlet. Keywords : Francis turbine, Pressure distribution, guide and runner passages, head drop, cavitations, efficiency.
Komposit Hibrid Polyester Berpenguat Serbuk Batang dan Serat Sabut Kelapa Lumintang, Romels C. A.; Soenoko, Rudy; Wahyudi, Slamet
Jurnal Rekayasa Mesin Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (466.751 KB)

Abstract

Sawdust coconut trunks of palm trees and fiber coconut coir are two waste materials from the processing of coconuts and coconut tree trunks sawmill waste are plentiful materials can be utilized for producing composites using polyester resins. Both each properties materials as follow polyester resin: liquid in the open air conditions, sawdust coconut and coconut coir fiber properties is lightweight and fragile nature of the polyester adhesive used as a binder (binder) between fiber coconut coir and sawdust coconut palm tree trunks as a filler. The variation volume fraction between the sawdust and coconut trunks of fiber coconut coir in polyester resin influence mechanical properties for each composition of this composite. By comparizing the volume fraction of either polyester, sawdust coconut palm tree trunks and fiber coconut coir (Coir coconut) using tensile test standard ASTM D638-I, and the ASTM D6110 for impact testing. The result of tensile and impact test, obtained that the optimum percentage 30:10 per cent, mean tensile strength on 95.953 N/mm2 , mean elasticity 0,125 % , mean elasticity modulus 768.702 N/mm2, mean absorbed energy 2,679 J and mean impact value 0,068 J/mm2. Keywords: Polyester, Sawdust coconut, coconut coir fiber, mechanical properties
Pengaruh Fraksi Volume Serat Empulur Sagu (Metroxylon sp) dan Presentase Alkali terhadap Pengujian Impak serta Absorpsi Air pada Komposit Berserat Sagu Nanulaitta, Nevada Mario; Soeprapto, Wahyono; Soenoko, Rudy
Rekayasa Mesin Vol 9, No 3 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (364.114 KB) | DOI: 10.21776/ub.jrm.2018.009.03.2

Abstract

Human necessities for good material to support daily activity are growing up, especially eco-friendly material.  Applications such as decoration, interior, until the furniture increased along with the population growth. Sago (Metroxylon sp) as one of the plants and also as one of the staple food in Maluku, this plant thrives in Maluku. To be processed into sago that is ready to eat required the process of extraction of sago tree (Metroxylon sp) trunk that leaves waste sago pith (fiber). In this research the utilization of waste fiber sago pith in use as composite amplifier with matrix is sago starch. Research using natural ingredients as composite maker, is expected to get composite that have good impact strength and good water absorption rate. The composites were made using hand lay up method with variation of volume fraction of sago pith fiber is 30% and 50% with NaOH solution and aquades in alkaline process with percentage comparison of 3%, 5%, 7% and 9% for 120 minutes immersion time. The results of this study found the best impact strength on the composite with a variation of fiber volume of 50% with alkaline process 9% with the highest value on the energy absorbed composite 6,9303 (J) with impact strength 0.0693 (J/mm2). The best water absorption rate is at 8.67% occurring on a 50% fiber fraction variation with a percentage of 9% NaOH alkali process.
Peningkatan Implementasi 5S Dan Total Productive Maintenance Dengan Menggunakan Pendekatan Dmaic Dan Expert System (Studi Kasus PT. “XYZ”, Jawa Timur) Nafida, Wiluddyana Ghoisi; Wardana, ING; Soenoko, Rudy
Rekayasa Mesin Vol 3, No 3 (2012)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (503.057 KB)

Abstract

This research aimed to increase implementation of 5S (Seiri, Seiton, Seiso, Seiketsu, Shitsuke) and Total Productive Maintenance (TPM) in a paper manufacture company using integration of DMAIC (Define, Measure, Analyze, Improvement, Control) approach and expert system. The DMAIC approach was used for obtain main problem why implementation worked ineffectively, root-cause problem, and improvement solution for business process. Expert system was used to help fastening consultation process while the expert of 5S and TPM, which is few in number, have no time to give consultation. Problems often occurred in 5S and TPM implementation during 2011-2012 are Seiso, Seiton, Autonomous Maintenance, and Seiri. Those problems are caused by the process business that only focused in audit system, instead of 5S implementation stage itself whereas many mechanic or electric still have wrong perception about 5S, and also caused by Autonomous Maintenance that not work effectively. The proposed improvement for the problem are to implement 5S activities on daily activities in simple way in order to introduce 5S culture and increase frequency and control of Autonomous Maintenance. Expert system development delivered application (called SIPAMS) that gives recommendation for main problem. SIPAMS help organization member, such as operator, mechanic, electric and others who didn’t receive 5S/TPM implementation training, to consult and to learn basic principles of 5S and TPM.Keywords: 5S, Total Productive Maintenace, DMAIC Approach, Expert System
Analisis Penerapan Metode RCM Dan MVSM Untuk Meningkatkan Keandalan Pada Sistem Maintenance (Studi Kasus PG. X) Lukodono, Rio Prasetyo; Pratikto, Pratikto; Soenoko, Rudy
Rekayasa Mesin Vol 4, No 1 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (324.973 KB)

Abstract

Maintenance system on milling season is using of preventive and corrective maintenance program. However, implementation of the program is still not guided with adequate SOP (Standart Operation Procedure) especially on a specific areas. Downtime occurring during year 2012 on the season were of 241.83 hours. This impacts to loss of potential profits, labor costs, and production capacity. To cope the problem, the study proposes application of Maintenance Value Stream Mapping (MVSM) supported by Reliability Centered Maintenance method (RCM). RCM consists of FMEA, reliability analysis, and RCM Worksheet. For the reliability analysis this study uses easyfit 5.5 profesional, whereas for the MVSM describes actual activity of the maintenance. Based on the application and analysis, it is known there exist 3 machines that are in critical condition and they show having the highest downtime, namely : Unigrator, cane Carrier I, and Cane Carrier II. The result of this research are SOP for actual activity of maintenance, time interval of maintenance, and tipe of maintenance for the machines.Key Word: MVSM, RCM, SOP Maintenance, 5S, FMEA, RCM Worksheet
Pengaruh Jumlah Sudu Terhadap Optimalisasi Kinerja Turbin Kinetik Roda Tunggal Pietersz, Richard; Soenoko, Rudy; Wahyudi, Slamet
Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (34.582 KB)

Abstract

Indonesia has a great potential to develop hydropower, because Indonesias mountainous topography and hilly and is drained by numerous rivers (large and small), and in certain areas there are lakes or reservoirs and the potential of water as an energy source. Hydroelectric Power Plant (PLTA) is a technology that has been proven to not harm the environment, support the diversification of energy as renewable energy, support the use of fuel reduction program, and most of the construction using local materials. Kinetic Turbine is one of the options in utilizing the potential of the kinetic energy in the form of velocity, kinetic studies using vertical shaft turbine, blade-shaped bowl that can withstand the flow in order to increase the tangential force generated.Amount ofkineticturbine bladesis one ofthe variablesthat affect therotationandtangentialstyle ofaturbine, so the effecton the value ofthe powerand efficiencyofakineticturbine. The results showedthe influence ofthe number ofbladesonthepowerand efficiency ofbladenumber5,7,9and11,where the number ofblades11have a greater influencethan thenumber ofblade5,7, and9.Keywords: waterturbine, number ofblades, Performance
Analisa Ketidaksesuian Beban Kerja Matakuliah Praktek Berbasis Time Study Dan Maynard Operation Sequence Techniques (Most) (Studi Kasus Pada Jurusan Teknik Mesin Politeknik Negeri Ambon) Pattiasina, Nanse Henny; Soenoko, Rudy; Astuti, Murti; Irawan, Yudy Surya
Jurnal Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.391 KB)

Abstract

Implementation of the practice course in the Department of Mechanical Engineering Polytechnic of Ambon during this work takes too long, so beyond the allocation of the appropriate amount of time available in the curriculum credits. Therefore it is necessary to analyze the workload mismatch practice course. Stages of student work time measurements performed using the method of Time Study and Maynard Operation Sequence Techniques (MOST) to obtain the normal time and standard time student practical work. Correlation with time available on the course curriculum for the Job Machine Tools 4 the number of credits is 144 hours, then declared for the methods of time study needs more work time (342.6 hours / 5 students), so the result is inadequate (less than 198, 6 hours). As for the method of MOST, obtained the required sufficient time (114 hours / 5 students).Keywords : measurement of time, the burden of college practice, MOST, standard time, normal time
Optimalisasi Sistem Perawatan Dan Perbaikan Terencana Mesin Produksi Berdasarkan Analisis Keandalan Pada Pltd Hatiwe Kecil Kota Ambon Demmatacco, Frederik; Soeparman, Sudjito; Soenoko, Rudy
Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (87.239 KB)

Abstract

Based on preliminary surveys, PLTD X has been operated long enough so that the generator engines often impaired even cause damages during operation. Even maintenance system contained in the PLTD X also has not done, which means there decrease in the production of electrical power generated.Maintenance activities that have been performed by PLTD X is the replacement of engine components damaged as a rejuvenation effort and overhaul that aims to extend the lifespan of the machine, but it is also the act of Preventive maintenance which aims to treat the machines that do not damage or interruption in operation. The dispute resolution process is the method for analyzing the Reliability Centered Maintenance component failure with FBD, System function and functional failure, FMEA and RCM Decision Worksheet. It also can determine the value of Mean Time To Failure (MTTF) and Mean Time To Repair (MTTR) is used to analyze systems engine maintenance. and as a basis for determining the time interval maintenance and total cost of maintenance.Based on the results of the calculation known critical components such as Cylinder Head, Inlet valve, Gasket, Exhaust Valve Housing, Exhaust Valve. Component maintenance time intervals determined by the RCM method is as follows, Cylinder Head with interval 4458 hours, Inlet Valve with 1601 hour, Gasket with 4682 Hours, Exhaust Valve Housing with 1908 hours, Exhaust Valve with 2238 hour. Critical component consisting of Cylinder Head, Inlet Valve, Gasket, Exhaust Vave Housing and Exhaust Valve is usingSchedulled Restoration Task type of maintenance.Keywords: critical components, decision worksheet RCM, FMEA, PLTD X
Perilaku Rambat Retak di Daerah Lubang yang Terekspansi pada Aluminium Alloy Syahrizal, Syahrizal; Purnowidodo, Anindito; Soenoko, Rudy
Jurnal Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (559.434 KB)

Abstract

Mechanism of crack propagation is done by loading the cycle against the perforated metal material will be difficult to avoid, to fatigue crack growth rate can be a way to expand its peg with the hole that normally uses metal balls as an alternative. By using a materials testing machine type cantilever bending eccentric crank, life time of the materials are determined. Research using the method of cold expansion hole in the aluminum alloy metal material to a hole with a diameter of 5 mm in expansion using pin with variation of  5,1 mm,  5,15 mm and  5,2 mm made that crack found on the side of the hole would be difficult to propagate due to residual stress comparison. The result shows that there are residual stresses around the hole which varies depending on the diameter of the pin. In addition, there is growing tensile residual stress within a certain distance of the specimen being tested resulted in a faster growth rate, this causes the material usage time will be shorter.Keywords: cold expansion hole, materials testing machine, aluminumalloy, comparison residual stress, life time.
Pengaruh Variasi Sudut Input Sudu Mangkok Terhadap Kinerja Turbin Kinetik Anam, Asroful; Soenoko, Rudy; Widhiyanuriyawan, Denny
Rekayasa Mesin Vol 4, No 3 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (523.552 KB)

Abstract

The most of renewable energy in Indonesia is hydro which all potential is for about 75000- 76000 MW. But the use of that potential is 3,783 MW of large-scale and 220 MW of small-scale only. The use of small-scale hydro energy is river flows which has speed with ranges 0.01 - 2.8 m/s and used for a source of electrical energy by kinetic turbines. Kinetic turbine is one of water turbines but it uses speed of river flows for changing the water’s kinetic energy into mechanic one. The performances of the kinetic turbines depends on many factors and one of them is the using of blades on the runner. Turbine with a cup blade, river flows mashes the blade and changes momentum that can provide the runner rotating. On that process, there is energy change, here is kinetic energy of river flows into mechanical one and produces electricity energy by a generator. So the purpose of this study is to determine the effect of kinetic turbine performance with a cup blade input corner variations. The results of this study indicates that the kinetic turbine with a cup blade input corner 10 o is the highest or maximum performance than 15 o and 20 o , because the cup blade input corner 10 o has much mass flows mashing and striking the blade and the kinetic turbine with cup blade input corner 20 o is the minimum performance.Keywords: Kinetic turbine, Turbine performance, bowl blade, input corner.