Experimental Study on the Influence of Using Pistons with Ceramic Crown on Actual Torque and CO Emission

2018 ◽  
pp. 370-376
Author(s):  
I. R. Şugar ◽  
M. Banica ◽  
L. Giurgiulescu
Keyword(s):  
Experimental Study ◽  
Ceramic Crown ◽  
Co Emission

Experimental Study on NOx Reduction and CO Emission by Fuel Lean Reburning Process

2008 ◽  
Vol 32 (3) ◽  
pp. 216-223
Author(s):  
Chang-Yeop Lee ◽  
Hak-Young Kim ◽  
Seung-Wook Baek ◽  
Se-Won Kim
Keyword(s):  
Experimental Study ◽  
Nox Reduction ◽  
Co Emission

Experimental Study of Coal Liquefaction Diesel Combustion and Emissions

2013 ◽  
Vol 291-294 ◽  
pp. 1914-1919
Author(s):  
Yu Li Dai ◽  
Yi Qiang Pei ◽  
Jing Qin ◽  
Jian Ye Zhang ◽  
Yun Long Li
Keyword(s):  
Experimental Study ◽  
Heat Release ◽  
Ignition Delay ◽  
Cetane Number ◽  
Combustion Process ◽  
Load Condition ◽  
Coal Liquefaction ◽  
Soot Emissions ◽  
Co Emission ◽  
Load Conditions

An experimental study was conducted on the combustion processes and emissions of direct coal liquefaction (DDCL) and Fischer-Tropsch (FT) fuels in a single-cylinder research diesel engine. Under low load conditions (5 bar IMEP), the results show that the ignition delay is shorter for the FT fuel compared with the reference fuel (Euro IV diesel), while it is longer for the DDCL fuel compared with the reference fuel. However, under high load conditions (10-15 bar IMEP), the Cetane number (CN) shows insignificant effects on the combustion process. The premixed heat release peaks of the fuels are correlated with the ignition delays, i.e. shorter ignition delay led to lower premixed heat release peak. For the emissions, both the FT fuel and the DDCL fuel show similar NOx level to the reference fuel under the conditions tested. The two liquefaction fuels show significantly lower soot emissions than the reference fuel, specifically for the higher load conditions (>=10bar IMEP), and the FT fuel produced the lowest level of soot emissions among the three fuels. For the FT and DDCL fuels, the HC emissions are generally lower than those of the reference fuel, except for the lowest load condition, which DDCL produces slightly higher HC emission. However, the CO emission of FT is lower than the reference fuel while the CO emission of DDCL is higher. In terms of unregulated emissions, the two liquefaction fuels show insignificant difference compared with the reference fuel at very low levels.

Investigation of Fuel Lean Reburning

2009 ◽  
Author(s):  
Hak Young Kim ◽  
Seung Wook Baek
Keyword(s):  
Experimental Study ◽  
Heat Input ◽  
Nox Reduction ◽  
Combustion Process ◽  
Total Heat ◽  
Nox Emission ◽  
Fuel Saving ◽  
Liquefied Petroleum Gas ◽  
Zero Level ◽  
Co Emission

The present work is focused on a fuel-lean reburn system to experimentally control NOx emission from combustion process. Fuel-lean reburn system is found here to be able to replace a conventional reburning technique due to reburn fuel saving. In the conventional reburning process the NOx emission is reduced up to 45% using 20∼25% reburn fuel of total heat input, while CO emission is restricted within acceptable limits by adopting additional air supplying system. However, in the fuel-lean reburn system, by contrast, the amount of injected reburn fuel into the reburning zone is low enough to maintain overall fuel-lean condition in the furnace, so that no additional air system is required, and CO emission can be maintained at almost zero level. In this study, an experimental study has been done to examine the formation characteristics of NOx in a lab scale combustor (15kW) with various oxygen enhanced combustion conditions. LPG (liquefied Petroleum Gas) was used as main fuel and reburn fuel. Finally, the current fuel-lean reburn system, even with only an amount of reburn fuel of 13% of total heat input, was observed to achieve a maximum of 48% in NOx reduction.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study
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