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An experimental investigation of effect on diesel engine performance and exhaust emissions of addition at dual fuel mode of hydrogen
Scopus
Toplam 242 atıf DOI
Internal combustion engines are an indispensable part of our daily life, especially in transportation and agriculture sectors. However, the reduction of petroleum resources and environmental problems are leading to an increasing trend towards alternative energy sources. In this regard, hydrogen usage is expected to be a solution for previously mentioned problems as one of the renewable energy resources. In this concept, effects of hydrogen as an additional fuel used in a compression ignition engine performance and exhaust emissions parameters different engine speeds were investigated at full load. For this purpose, a compression ignition engine (CI) with 17/1 compression ratio, four cylinders, four stroke, turbocharger and 3.908 liters engine volume was used. While diesel fuel was injected directly to combustion chamber, hydrogen was added to inlet manifold at rates of 2.5%, 5% and 7.5% as volume. As a result, an increase in engine torque, power, thermal efficiency, nitrogen oxides (NOx) and exhaust gasses temperatures were acquired at every hydrogen addition ratio while a decrease in hydrocarbons (HC), carbon monoxide (CO) and oxygen (O2) emissions were attained. While engine torque exhibited an increase at a rate of 8.3% comparing with standard diesel operation at 1250 min- 1 and 7.5% hydrogen addition ratio, engine power increased 17% at 2250 min- 1 engine speed and 7.5% hydrogen addition ratio. Brake thermal efficiency of 2.5% was obtained as 40.4% comparing with 33% value of SDI at 1750 min- 1. The lowest CO, CO2, HC and NOx emission values were obtained at 2250 min- 1 engine speed and 2.5% hydrogen addition ratio as 0.013; 2500 min- 1 engine speed and 7.5% hydrogen addition ratio as 7.4%; 1250 min- 1 engine speed and 2.5% hydrogen addition ratio as 10 ppm and 1000 min- 1 engine speed and 7.5% hydrogen addition ratio as 1092 ppm respectively comparing with standard diesel operation. © 2013 Elsevier B.V.
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Atıf Yapan Yayın
Investigation of the effect of advance angle on performance and emissions (exhaust, vibration, noise) in a single-cylinder diesel engine whose fuel system is converted to common rail
Scopus
Havuzumuzda Open Access 5 atıf almış
In diesel engines, the most important parameter affecting the combustion performance is the injection advance. Since the injection advance directly affects the combustion quality, it also directly affects the outputs, such as ignition delay, in-cylinder pressure, fuel consumption, and emission values. Therefore, setting the advance angle correctly is exceedingly significant for the optimum operation of the engine in all conditions. In this study, a single-cylinder diesel engine with a mechanical fuel system was converted to a common rail fuel system by revising its fuel system. Experiments were carried out with the converted engine at a constant speed (1850 rpm), at different loads (3–4.5–6–7.5–9 Nm), and at different advance angles (10, 12, 14, 16, 18°). In the experiments, engine performance and emission (exhaust, vibration, noise) data were examined. When the cylinder pressure data is evaluated, the maximum in-cylinder pressure approaches the top dead point in parallel with the increase in the advance angle. Specific fuel consumption occurred at a minimum advance angle of 10° under all load conditions. In exhaust emissions, minimum values at 10° advance angle were obtained for all emissions except for oxygen emissions. Vibration emissions were reduced by 6% at a 10° advancing angle compared to 18° advancing angle at 3 Nm load. It was determined that noise emissions decreased by 1.76% in the same experimental parameters. When all data are evaluated, the optimum advance angle for the revised fuel system has been determined as 10°.
Atıf Yapan Makale Bilgileri
Kurumlar (2)
Karamanoğlu Mehmetbey Üniversitesi
Karaman, Turkey
Selçuk Üniversitesi
Selçuklu, Turkey