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Jorfri B Sinaga
Lampung University
Mechanical Engineering

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KAJIAN EKSPERIMENTAL PENGARUH PANJANG CHORD SUDU TERHADAP UNJUK KERJA TURBIN HELIK UNTUK SISTEM PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) Ahmad Rapa'i; Jorfri B Sinaga; M.Dyan Susila
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
Publisher : Jurnal Ilmiah Teknik Mesin

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All this time microhydro power plants (MHP) created a resource use of  water flow has high fall of water (head) while for areas that have stream of river but do not have high fall of water (head) still a lot of untapped but has potential hydrokinetic be able rotating turbine. This is what lies behind the research conducted to determine the effect of chord length on the performance of the helical turbine which is expected to come helical turbine performance as the optimum use of the potential hydrokinetic. Helical turbine tested had dimensions of 1.2 m high and 1 m in diameter, blade profile NACA 0030, chord length 15 cm, 20 cm and 25 cm with number of blades 3 pieces. Tests performed on the irrigation canals that open to varying water velocity of 0.52 m/s, 0.68 m/s and 0.8 m/s. From the test results obtained helical turbine performance as follows. The largest torque obtained in water velocity of 0.52 m/s, 0.68 m/s and 0.8 m/s is 3.89 Nm, 27.09 Nm and 39.38 Nm is the chord length of the turbine with 25cm and the smallest torque on the chord length of 15 cm of 2.31 Nm. Power largest turbine in the water velocity of 0.52 m/s, 0.68 m/s and 0.8 m/s is 7.12 Watt, 60.41Watt and 103.96 Watt, turbine that is on the chord length of 25 cm and the smallest turbine power chord length of 15 cm by 3.58 watts. Largest turbine efficiency at water velocity of 0.52 m/s, 0.68 m/s and 0.8 m/s is 8.44%, 32.02% and 33.84% in the turbine with a chord length of 25 cm and efficiency the smallest turbines on the chord length of 15 cm of 1,17%. Keywords : microhydro, water turbine, helical turbine, chord length, helical turbine performance
KAJIAN EKSPERIMENTAL PENGARUH BENTUK SUDU TERHADAP UNJUK KERJA TURBIN HELIK UNTUK SISTEM PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO (PLTMH) Andareas Wijaya Sitepu; Jorfri B Sinaga; Agus Sugiri
Jurnal Ilmiah Teknik Mesin Vol 2, No 2 (2014): Jurnal FEMA Vol.2 No.2 Tanggal 10 April 2014
Publisher : Jurnal Ilmiah Teknik Mesin

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Abstract

Electric energy demand in Indonesia is currently growing and is still dominated by energy-based fossil fuels, such as petroleum and coal. Fossil fuels are not renewable energy, so that when exploited continuously then fossil fuel reserves will be exhausted. In addition there are also areas where geographical conditions which do not allow the electrical networks up to the community. It needs to be made an effort to supply electrical energy needs by utilizing existing and potential conditions on the area such as energy of water flow. One of the turbines that can be used to harness the energy of water flow is helical turbines. The parameters for the use of a turbine is one form of helical blades (NACA), where the form of the blades (NACA) it affects the style of the lift and drag forces helical turbines. On the research study was performed experimentally on effect shape of blade of the helical turbine blades form by varying the shape of turbine blades NACA 0020, 0025 and 0030 with number of blades as much as 3 pieces for each form of blades. From the results of testing the turbine efficiency is obtained by helical 33,97% on the operation of the turbine blades with NACA helical 0030 and water flow rate of 0.8 m/s with a given light load of 130 Watts.Keywords : water turbines, micro hydro, the helical turbine, water power.
PERANCANGAN ALAT UJI GESEKAN ALIRAN DI DALAM SALURAN Jhon Fitter Siregar; Jorfri B Sinaga
Jurnal Ilmiah Teknik Mesin Vol 1, No 1 (2013)
Publisher : Jurnal Ilmiah Teknik Mesin

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Abstract

Mechanical Engineering Department, University of Lampung has been established since 1998 and implementation of the learning process at this Department supported by ten laboratories. One of these laboratory is laboratory of Mechanical fundamental phenomena. But testing equipment available until now in this laboratory is still lacking. In this paper is given, design an analysis of test result of friction flow in channel testing equipment, with channels used are: circle, triangel, square with hydraulic diameter of Dh . Results of testing equipment show relationship between friction factor f and Reynolds number close to the graph on Moody diagram in the textbook of fluid mechanics. That means, this friction flow in channel testing equipment can be used to support laboratory work of mechanical fundamental phenomena in the Mechanical Department Engineering, University of Lampung.Keywords: Design, friction factor, laboratory work, mechanical fundamental phenomena.
Co-Authors Agus Sugiri Ahmad Rapa'i Andareas Wijaya Sitepu Jhon Fitter Siregar M. Dyan Susila