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I Made Suardjaja
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PENGUJIAN KINERJA MESIN DAN EMISI GAS BUANG MESIN DIESEL BERBAHAN BAKAR EMULSI PADA BERBAGAI TEKANAN INJEKSI Mangalla, Lukas Kano; Suardjaja, I Made
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscentia Vol 1 No 2 Februari 2009
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v1i2.398

Abstract

The aim of this research is to examine the effect of increasing injection pressure on engine performance and exhaust emission of emulsified fueled diesel engine. The diesel exhaust emission such as Nitrogen Oxide (NOx), Carbon Monoxide (CO), Unburned Hydrocarbon (HC) and Soot can be controlled through complete combustion and lower peak combustion temperature. This phenomenon occurred by utilizing fuel-water emulsion at high injection pressure to obtain a good atomization and perfect mixing of fuel-air in combustion chamber. The engine employed in this research was four stroke single cylinder diesel engine, with bore of 75 mm and stroke 80 mm. Engine was operated at vary throttle position from 20%, 40%, 60%, 80% and 100%. At each throttle position rpm, load, fuel consumption, inlet pressure, exhaust temperature, carbon monoxide, unburned hydrocarbon and opacity were measured. CO-HC emissions are measured by Mexa 321E and opacity by LDR tester. The injection pressure of fuel was varied at 145, 170 and 195 kg/cm2. The concentration of water in emulsion fuel was varied of 0%, 10%, 20% and 30%W/O. ABS (Alkyl benzene Sulfonate) was used as emulsifier of water and diesel fuel with 0,22% volume. The result of the research show that torque and power of diesel engine were relatively constant with increasing injection pressure but emission of CO, HC and opacity reduced significantly. Increasing of injection pressure from 145 to 195 kg/cm2 resulted in reducing emission of CO, HC and opacity by 73 %, 60 % and 26.4 % respect-tively at wide-open-throttle.
PENGUJIAN KINERJA MESIN DAN EMISI GAS BUANG MESIN DIESEL BERBAHAN BAKAR EMULSI PADA BERBAGAI TEKANAN INJEKSI Mangalla, Lukas Kano; Suardjaja, I Made
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscentia Vol 1 No 2 Februari 2009
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v1i2.398

Abstract

The aim of this research is to examine the effect of increasing injection pressure on engine performance and exhaust emission of emulsified fueled diesel engine. The diesel exhaust emission such as Nitrogen Oxide (NOx), Carbon Monoxide (CO), Unburned Hydrocarbon (HC) and Soot can be controlled through complete combustion and lower peak combustion temperature. This phenomenon occurred by utilizing fuel-water emulsion at high injection pressure to obtain a good atomization and perfect mixing of fuel-air in combustion chamber. The engine employed in this research was four stroke single cylinder diesel engine, with bore of 75 mm and stroke 80 mm. Engine was operated at vary throttle position from 20%, 40%, 60%, 80% and 100%. At each throttle position rpm, load, fuel consumption, inlet pressure, exhaust temperature, carbon monoxide, unburned hydrocarbon and opacity were measured. CO-HC emissions are measured by Mexa 321E and opacity by LDR tester. The injection pressure of fuel was varied at 145, 170 and 195 kg/cm2. The concentration of water in emulsion fuel was varied of 0%, 10%, 20% and 30%W/O. ABS (Alkyl benzene Sulfonate) was used as emulsifier of water and diesel fuel with 0,22% volume. The result of the research show that torque and power of diesel engine were relatively constant with increasing injection pressure but emission of CO, HC and opacity reduced significantly. Increasing of injection pressure from 145 to 195 kg/cm2 resulted in reducing emission of CO, HC and opacity by 73 %, 60 % and 26.4 % respect-tively at wide-open-throttle.
Studi Eksperimental Pengaruh Bilangan Reynolds pada Keefektifan dan Koefisien Tekanan Penukar Panas Berkas Pipa Eliptik Susunan Berseling Budi Utomo Kukuh Widodo; Samsul Kamal; Suhanan .; I Made Suardjaja
Jurnal Energi Dan Manufaktur Vol 5 No 1 (2012): Oktober 2012
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (518.63 KB)

Abstract

Experimental studies have been conducted on the elliptic tube bundle with a diameter equivalent to 0.75inches and the aspect ratio (AR) = 2.Tube bundle arranged alternate with 4-3-4 configuration and pitchlateral (SL) = 1.5 X axis major axis. Meanwhile pitch transverse (ST) varied 1.5 and 2 X minor axis. TheTesting was carried out in a subsonic wind tunnel with wind speeds of 1 m / s - 12.6 m / s resultingReynolds number Reb = 346-6904 and operating temperature 49 oC, 59 oC and 69 oC. Seven tubesinserted an electric heater produces uniform heat flux 3718 W/m2 - 3751 W/m2. The results show that theeffectiveness of the heat exchanger (Q / P) varied from 3799 to 15, decreases exponentially at lowReynolds number and tends to asymptotic at Reynolds number above 1000. Meanwhile, the valuepressure coefficient (?p/0.5?V2) with value 3.4-10 decreased continuously at low Reynolds numbers andasymptotic at high Reynolds number. In general, a bundle with a smaller ST has greater effectiveness andthe pressure coefficient ranges is wider. Changes in operating temperature conseqwenly no effect on theeffectiveness and the pressure coefficient at high Reynolds number.
Co-Authors Budi Utomo Kukuh Widodo Lukas Kano Mangalla, Lukas Kano Samsul Kamal Suhanan .