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Hasil Pencarian

Ditemukan 3 dokumen yang sesuai dengan query
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Ralbovsky, Edward
Albany: Delmar Publishers, 1996
629.250 6 RAL i
Buku Teks SO  Universitas Indonesia Library
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Muhammad khayam
"Salah satu alternatif pengendalian polusi udara dari emisi gas buang kendaraan bermator yaitu menggunakan catalytic converter. Namun penggunaanya terbatas, disebabkan terbatasnya rentang AFR, meningkatnya gas aldehyde ketika menggunakan campuran bensin-oksigenat selain gas bermacam lainnya seperti CO & UHC serta meningkatnya turunnya tekanan gas buang.
Penelitian ini bertujuan untuk mengetahul kinerja catalytic converter serta pengaruhnya terhadap kinerja motor bensin, yang menggunakan mesin uji 1.500 cc dan dipasang TWCC dengan bahan aktif platinum dengan rnetode pengujian pada beban tetap (10 & 13 kg) dan putaran tetap (1.800 & 2.300 rpm).
Hasil penelitian yaitu komposisi gas CO dan UHC sebelum TWCC sudah berada di bawah nilai ambang Batas, sedangkan komposisi gas aldehyde masih relatif tinggi namun berkurang dengan peningkatan AFR. Penggunaan TWCC mampu menurunkan lebih rendah lagi komposisi gas buang hingga dicapai efisiensi konversi maksimum CO 81,3%, UHC = 78,2% dan aldehyde = 58,9%. Waktu tinggal gas buang diperoleh 0,0032 - 0,123 detik, fenomena perpindahan fluida terdiri den bilangan Reynold : 196 - 543, bilangan Sherwood : 3,67 - 3,74 dan bilangan Nusselt : 3,68 - 3,70. Namun penggunaan TWCC dapat menurunkan daya motor (BHP), meningkatkan konsumsi bahan baker spesifik (BSFC) dan meningkatkan turun tekanan (-AP). Prosen kehilangan daya motor berkisar antara 3,5 - 15%, sedangkan prosen kehilangan daya motor terhadap tune.' tekanan berkisar antara 0,07 - 0,09% per mmH2O.

One of alternatives to control air pollution of vehicle exhaust gas emission is catalytic converter. However it is limited, is caused by limited AFR, increasing of aldehyde emission when using gasoline-oxygenate mixtures besides other poisonous substances like CO & UHC and also increasing exhaust gas pressure drop.
This research purpose to study about catalytic converter performance and the influence to the motor performance, which use test bed engine t500 cc and is installed by TWCC with platinum as active catalyst, with test method at the constant load (10 & 13 kg) and constant rotational speed (1.800 & 2.300 rpm).
The results of test are CO and UHC composition before entering TWCC is below the threshold value, while the higher value of aldehyde composition can be decreased with increasing of AIR. Using TWCC is able to decrease lowered exhaust composition until reaching maximum conversion efficiency for CO = 81,3%, UHC = 78,2% and aldehyde = 58.9%. Residence time of exhaust gas is 0,0032 - 0,123 s, fluid transfer such are Reynold Number : 196 - 543, Sherwood Number : 3,67 - 3,74 and Nusselt Number : 3,68 - 3,70. However using TWCC can decrease brake horse power (BHP) and increase brake specific fuel consumption (BSFC). Percentage of brake horse power loss is 3,5 - 15%, while brake horse power loss per pressure drop is 0,07 - 0,09% per mmH2O.
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Depok: Fakultas Teknik Universitas Indonesia, 2002
T3504
UI - Tesis Membership  Universitas Indonesia Library
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Nguyen-Schafer, Hung
"This book deals with rotordynamics of automotive turbochargers while encompassing the analysis of the dynamics of rotating machines at very high rotor speeds of 300,000 rpm and above. This interdisciplinary field involves 1. thermodynamics and turbo-matching knowledge to compute working conditions of turbochargers, 2. fluid and bearing dynamics to calculate various operating thrust loads and to design the rotating floating ring bearings (two-oil-film bearings), and 3. tribology to improve the rotor stability and to reduce the bearing friction. Mathematical background in modeling and simulation methods is necessary; however, the prerequisites have been kept to a minimum. The book addresses both practitioners working in the field of rotordynamics of automotive turbochargers and graduate students in mechanical engineering. "
Berlin: [;Spinger-Verlag, Springer], 2012
e20398790
eBooks  Universitas Indonesia Library