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Mesin
Published by Institut Teknologi Bandung
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Core Subject : Engineering,
Mechanical Engineering
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Articles 5 Documents
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Search results for , issue "Vol. 19 No. 2 (2004)" : 5 Documents clear
ANALISIS RESIKO REAKTOR KIMIA BERDASARKAN STANDAR INSPEKSI BERBASIS RESIKO (RISK BASED INSPECTION: RBI) API 581 T. A Fauzi Soelaiman; Ahmad Taufik; Tito Arya Soma
Mesin Vol. 19 No. 2 (2004)
Publisher : Mesin

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Abstract

Inspection is an activity to detect and evaluate the possibility of damage or degradation of operating equipment. Risk Based Inspection (RBI) Method is one of management inspection methods based on risk level of an equipment or a work unit. The RBI Method uses a combination of two parameters (category of failure possibility and category of failure consequence) for determining the level of risk for industrial equipment. The method was applied to several chemical reactors in a petrochemical industry such as Hydrotreater, Secondary Reformer, Shift Converter, Ammonia Synthesis Converter, Methanator, Zinc Oxide Guard, and Mercury Guard Chamber. Using qualitative RBI method, the risks of the equipment are as follow: Hydrotreater (Low Risk), Secondary Reformer (Low Risk), Shift Converter (Low Risk), Ammonia Synthesis Converter (Low Risk), Methanator (Low Risk), Zinc Oxide Guard (Low Risk), and Mercury Guard Chamber (Low Risk). Meanwhile, using semi-quantitative RBI method, the risks were found to be: Hydrotreater (High Risk), Secondary Reformer (High Risk), Shift Converter (High Risk), Ammonia Synthesis Converter (High Risk), Methanator (High Risk), Zinc Oxide Guard (High Risk), Mercury Guard Chamber (High Risk).
KAJI EKSPERIMENTAL DAN NUMERIK KINERJA CYCLO DUST FILTER Prihadi Setyo Darmanto; Joko Sarsetyanto
Mesin Vol. 19 No. 2 (2004)
Publisher : Mesin

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Abstract

One of the methods for increasing separation efficiency of a cyclone is to implement a fabric filter at its inner tube. The combination of cyclone separator and fabric filter in commonly called as cyclo-dust filter. This paper presents an experimental study of the performance test of cyclo-dust filter and CFD numerical simulation of the flow inside this apparatus. The experiment was conducted for some variation of filter area. The results show that the separation efficiency of more than 99% was observed. This value is normally very difficult to reach with a normal cyclone separator. The pressure drop rises with the increasing of fabric's area. However this increase of pressure drop is not proportional to the increase of the fabric's area. The CFD simulation was also used for determining the best position of inlet duct.
KAJI KOMPUTASIONAL PENGARUH BEBAN DAN KEAUSAN TERHADAP KEKAKUAN BANTALAN ROL Carolus Bintoro; Komang Bagiasna; Djoko Suharto; Zainal Abidin
Mesin Vol. 19 No. 2 (2004)
Publisher : Mesin

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Abstract

This paper explores the study of numerical determination of roller bearing stiffness as a result of wear increment by using contact Hertzian method. This study is part of the research on the determination of roller bearing vibration response as a result of wear increment. In this paper, wear is assumed as diametral clearance, Cd, and force work in radial direction. Computational method shows that increasing wear causes the decrease of stiffness. The relationship between deflection and stiffness, radial load and stiffness as a function of Cd can be determined.
KAJI EKSPERIMEN OPTIMASI KOEFISIEN DAYA SKEA JENIS POROS DATAR DENGAN SUDU GABUNGAN SILINDER BERPUTAR DAN ROTOR SAVONIUS Maria F Soetanto; Aryadi Suwono; Prihadi S Darmanto; Ari D Pasek
Mesin Vol. 19 No. 2 (2004)
Publisher : Mesin

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Abstract

Horizontal Axis Wind Energy Conversion System (HAWECS) is more efficient than other Wind Energy Conversion Systems at the same condition [2,3]. Rotating cylindrical blade is taken as the substitute alternative to the airfoil blade considering that presence of lift force and its simple manufacturing production. The lift force generated by the rotating cylinder is known as the Magnus Effect [1,7,9]. The savonius rotor in this research is employed to propel the cylinder. This research conducted an experiment to optimize the energy conversion of a HAWECS which its blades consist of the combination of cylinder and savonius rotor. Two kind of blades were used in this experiment, i.e.blade with L/D (ratio of the length and diameter of cylinder) equals to 3 and 4. Three variations of wind velocities were used, i.e. 8.5 m/s, 9.7 m/s, and 10.2 m/s. Experimental results present that the blade with L/D ratio = 4 give more efficient than the L/D = 3, and the increase of power was reached if the wind velocity increases.
A PLAUSIBLE ENERGY YIELD FROM PALM OIL MILL EFFLUENT Ing. Ondřej Cundr
Mesin Vol. 19 No. 2 (2004)
Publisher : Mesin

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Abstract

Application of biogas generated from palm oil mill effluent for producing electricity has been proven as an ecological alternative to naphtha and fossil fuels. In the first part of this article, the process of making oil from fresh fruit bunches is briefly described together with amounts of waste gained. After that, different types of treatment of palm oil mill effluent (POME) as one of results of the process are examined, resulting in a suggestion of anaerobic digestion under thermophilic conditions as the best way to treat POME. Finally, attention is also paid to the emission reduction during an anaerobic digestion in close tanks. The aim of the article is to stress the overwhelming energy potential of POME that can bring high increase in electrification ratio and recognizable decrease of air pollution on the island of Sumatra.

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