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INDONESIA
Mesin
Published by Institut Teknologi Bandung
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Core Subject : Engineering,
Mechanical Engineering
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Articles 5 Documents
 1 
Search results for , issue "Vol. 19 No. 1 (2004)" : 5 Documents clear
KELAMBATAN WAKTU PENYALAAN CAMPURAN SOLAR DAN METIL ESTER KELAPA SAWIT PADA MOTOR DIESEL INJEKSI LANGSUNG Prawoto L; Shalahuddin Shalahuddin; R. C Nugroho
Mesin Vol. 19 No. 1 (2004)
Publisher : Mesin

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Abstract

Ignition delay is an important parameter in diesel engine operation. It is defined as the time (or crank angle degree) between the start of injection and the start of combustion. Ignition delay should be kept as short as possible, otherwise diesel knocking can occur if the delay is too long. Many works have shown that increasing fuel cetane number may shorten the ignition delay. In conjunction with the BPBT "“ PPKS Biodiesel Project to utilize methyl ester palm oil (sawit) (MES) as an alternative fuel, several compositions of MES-conventional diesel fuel blends were tested. Cetane number of MES-diesel fuel blends were calculated to be higher than that of conventional diesel fuel. Hence, it was expected that the MES-diesel fuel blends would yield shorter ignition delay than pure diesel fuel. Engine tests were conducted to compare the performance of several blends of MES-diesel fuel. The results from in-cylinder pressure data, from which ignition delay was determined have confirmed this work. Furthermore, correlations between ignition delay, cetane number, and engine speed have been obtained in simple linear equations.Key words: Ignition delay, Cetane number, Biodiesel, Methyl Ester Sawit (MES), Direct injection.
Perancangan, Pembuatan dan Pengujian Omnidirectional Vehicle Muljowidodo Muljowidodo; Cahyadi Setiawan
Mesin Vol. 19 No. 1 (2004)
Publisher : Mesin

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Abstract

Research and development of Robot Vision activity requirs a Moving platform with high mobility on translation as well as rotation movement. Omnidirectional vehicle reported here has optimum planar movement in the form translational movement on any direction as well as turning radius from zero to infinity, therefore it is suitable as a moving platform for research activities on 2 dimensional Robot Vision. Testing and measurement on the accuracy of vehicle straight trajectory on different direction have been carried out. Some error compensation algorithm has been applied and some good results on reducing trajectory errors have been observed.
PEMBUATAN PERANGKAT LUNAK CAM UNTUK MESIN CNC FREIS 3 SUMBU PADA AutoCAD Sigit Yoewono Martowibowo; Wildan Rojuli Daa'i
Mesin Vol. 19 No. 1 (2004)
Publisher : Mesin

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Abstract

This study is aimed to produce CAM software run under AutoCAD 2000 or latest version using Visual Basic for Application (VBA) program. Machining processes are carried out using endmill cutter at X-Y plane. Input of this software is 3-D drawings of the model. The output of this software are G-Code of cutting tool path. The software also provides fasilities to approach spline and ellips with connected lines but still considering geometric tolerances of line profile.
PREDIKSI DAN ANALISIS KESTABILAN GERAK LONGITUDINAL KAPAL BERSAYAP WING-IN-SURFACE EFFECT Hari Muhammad
Mesin Vol. 19 No. 1 (2004)
Publisher : Mesin

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Abstract

This paper discusses the stability of Wing-in-Surface-Effect (WiSE) craft. The aerodynamic parameters of new WiSE craft jointly designed by the Agency for the Assessment and Application of Technology, Indonesian Aerospace Ltd. and Institute of Technology Bandung are estimated using software Digital Datcom of the US Air Force. The aerodynamic parameters are used to predict the longitudinal stability characteristics of the WiSE craft. The surface effect on some aerodynamic parametes that influence the longitudinal stability of the WiSE craft will be discussed in this paper.
PEMODELAN PERPINDAHAN PANAS PROSES PENDINGINAN TERAK SEMEN DALAM GRATE COOLER Prihadi Setyo Darmanto; Sri Sugiharto
Mesin Vol. 19 No. 1 (2004)
Publisher : Mesin

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Abstract

Cooling of clinker into grate cooler is one of important processes in cement manufacturing because it influences the quality of the clinker and also determines heat recovery of the combustion air which related well to the fuel consumption. Heat transfer mechanism of the clinker cooling comprises radiation, convection, and conduction. This paper presents a numerical method of clinker cooling process on a grate cooler in order to evaluate temperature distribution of both clinker and cooling air in vertical and horizontal directions along the grates. The result was validated with the measurement of clinker temperature at the discharge section of the cooler. The proposed evaluation method will pave the way for determining the constant values of the control system for cooling air..

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