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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
 1 
Search results for , issue "Vol. 11 No. 2 (1996)" : 5 Documents clear
PERBANDINGAN PERSAMAAN KOEFISIEN PERPINDAHAN KALOR KESELURUHAN UNTUK PERANCANGAN PENUKAR KALOR Yuli Setyo Indartono; Ari Darmawan Pasek
Mesin Vol. 11 No. 2 (1996)
Publisher : Mesin

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Abstract

This paper concerns with comparison of various heat transfer equations which can be used in the design of a shell and tube heat exchanger for combustion gas and air. A computer programme which also includes the thermodynamics properties of the gas and air was made for that purpose. Characteristics of the heat exchangers are then compared with the existing industrial heatexchanger. It was found that the overall heat transfer coefficient equation proposed by Babcock & Wilcock gives the best results .
PENGEMBANGAN PERANGKAT LUNAK UNTUK PENERAPAN TEKNIK PINCH DENGAN MELIBATKAN KENDALA RUGI TEKANAN Willy Adriansyah; Aryadi Suwono
Mesin Vol. 11 No. 2 (1996)
Publisher : Mesin

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Abstract

The existing software of pinch technique provide only the tool for the heat exchanger network design. To improve the reliability of the software, in particularly for retrofitting the existing system, several additional aspects need to be included. In this paper, an algorithm to determine the optimum condition of heat exchangers for a specified allowable head loss is proposed. With this new method, the retrofit design of an existing system can be done even by taking into consideration of using the existing fluid circulation systems (i.e. pumps and compressors). The proposed method of heat exchanger can also be used under the pressure drop constraints on both tube and shell sides.
SEMI OTOMASI MESIN PENYEIMBANG Zainal Abidin; Komang Bagiasna; Sigit Purwowinarwan; Ishak S Iskandar
Mesin Vol. 11 No. 2 (1996)
Publisher : Mesin

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Abstract

This paper presents research on the development of semi automation technique for balancing machines. Using this technique, rotational speed of rotors, data acquisition process, and amplitude and phase of vibration calculations could be performed by a computer. Consequently, faster and more accurate balancing process can be achieved. The effectiveness of the proposed control method was verified using experimental results. In this test, the rotor speed was measured by and compared to the results obtained from software, a digital oscilloscope, a digital tachometer and a Multi Channel Spectrum Analyzer M/ISA). Furthermore, to verify the accuracy of amplitude and phase calculations, the values obtained from the developed software were compared to those from analytical results obtained from MSA.
PENGEMBANGAN METODE PENYEIMBANGAN LANGSUNG TANPA MENGGUNAKAN MASSA COBA Ishak S Iskandar; Zainal Abidin; Komang Bagiasna
Mesin Vol. 11 No. 2 (1996)
Publisher : Mesin

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Abstract

This paper deals with the development of direct balancing method that uses no trial mass. This activity is the continuation work of the previous research on semi automation of balancing machine that has been performed at the Dynamics Laboratory IUC-ES ITB. This method has been developed by using Frequency Response Function (FRF) data of a balancing machine as a function of frequency and rotors masses that will be balanced. These FRF data are used as aconversion factor of voltage, which is the output of velocity transducer, to unbalance flzrce. Using this method, the balancing process can be perfiarmed faster and more accurately than that of conventional balancing methods.
PEROLEHAN SILIKAT DARI ABU SEKAM PADI DALAM SPOUTED-BED: EFEK PERPINDAHAN MASSA Johnner P Sitompul; Agus Wanadri
Mesin Vol. 11 No. 2 (1996)
Publisher : Mesin

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Abstract

A 5 cm diameter spouted-bed reactor has been applied for solid-liquid reaction, paddy ash and NaOH producing Na-silicate. Hydrodinamics of spouted-bed reactor was studied by using paddy ash-water system. Correlation for minimum superfisial spouting (Ums) was determined and follows the equation. ( in cgs unit)The spouted bed (SB) operates under transition regime i.e. Reynold number particle range 7-25 or Re number fluid ranging from 19 to 254. The mass transfer is the controlling step for this system as for all solid-liquid reactions are very fast. So, a model of mass transfer has been derived and mass transfer correlation in SB follows equations Sh = 191,34 + 0,6325 Sc0.35 Re1.89 Above correlation shows high mass transfer at stagnant fluid compared to other mass transfer correlations which is due to reacting system involved.Kata kunci : sunbungan adhesives, perfonnansi kekakuan. performansi perpindahan panas.

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