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The use of natural gas in compression ignition engines as supplement to liquid diesel in a dual fuel combustion mode is a promising technique. In this study, the effect of DF (dual fuel) operating mode on combustion characteristics, engine performances and pollutants emissions of an existing diesel engine using natural gas as primary fuel and neat diesel as pilot fuel, has been examined. At moderate...
In this experimental research, the exergy recovery from a DI Diesel engine is investigated where a turbocharged OM314 DIMLER diesel engine was tested at various engine speeds (1200, 1400, 1600, 1800 and 2000 rpm) and torques (20, 40, 60, 80 and 100 N m). For this aim, a double pipe heat exchanger with counter current flow is used in the exhaust of engine. As an important outcome, by increasing the...
The aim of the this work has been to evaluate the performance of a small-size CCHP (Combined Cooling Heating and Power) system based on the integration of 20 kW Lombardini diesel engine and a double effect water-LiBr absorption chiller.This integrated system has been designed to produce both hot water, by recovering heat from the engine cooling system, and chilled water, by recovering heat from the...
Hybrid vehicles can use energy storage systems to disconnect the engine from the driving wheels of the vehicle. This enables the engine to be run closer to its optimum operating condition, but fuel energy is still wasted through the exhaust system as heat. The use of a turbogenerator on the exhaust line addresses this problem by capturing some of the otherwise wasted heat and converting it into useful...
The present work explores the possibility of simultaneous reduction of NO x and smoke of a stationary CI (compression ignition) engine fuelled with biodiesel blend. Fuel injection timing is retarded which resulted in lower NO x emission with an increased smoke intensity. NO x emission of the biodiesel at the standard and retarded injection timing was predicted with the help...
This study used the fast pyrolysis method to produce bio-oil from coffee bean residue. The oil was mixed with diesel fuel through emulsification to produce emulsified fuel with varying proportions. A single-cylinder diesel engine connected to a 12-kW power generation system was used as the test system to examine the performance indices of a diesel engine under various loads and rotational speeds when...
Because of the stringent nitrogen oxides (NO x ) emissions legislation for heavy-duty diesel engines, the SCR (selective catalytic reduction) has been investigated by many researchers. The objective of these studies is to investigate the reasons why the temperature downstream of the SCR catalyst is not always equal to that upstream with a commercial V 2 O 5 catalyst applied...
Fat trap grease is a cheap source for biodiesel production, but until now its transformation into biofuel is not well studied. The effects of the use of biodiesel from degraded raw material on combustion in engines are not discussed by researchers. In this paper, engine tests were performed on biodiesel produced from AFR (animal fat residues) collected from fat traps. This fuel presents differences...
An experimental investigation on engine performance, emissions, combustion and vibration characteristics with coconut biodiesel fuels was conducted in a high-pressure common-rail diesel engine under five different load operations (0.17, 0.34, 0.52, 0.69 and 0.86 MPa). The test fuels included a conventional diesel fuel and four different fuel blends of coconut biodiesel (B10, B20, B30 and B50). The...
Biodiesel or oxygenated fuel from renewable sources set a challenge to the engine technology to design relevant systems for keeping high efficiency and low environmental impact. The objective of this paper was to investigate the influence on combustion and emissions in a Euro 5 light duty diesel engine fueled with gasoline–diesel, butanol–diesel and commercial diesel fuels. Engine tests were carried...
ANN (artificial neural network) modeling is adopted along GA (genetic algorithm) optimization method in order to investigate spray behavior as function of nozzle and engine variant parameters such as crank-angle, nozzle tip mass flow rate, turbulence, and nozzle discharge pressure. Spray quality is measured in SMD (Sauter mean diameter) and spray liquid tip penetration prospective. Experimental data...
Steam injection technique newly proposed with EGR (exhaust gas recirculation) is applied into a direct injection diesel engine to decrease NOx emissions for the objective of reaching the new emission regulations. Experimental and combustion model as a theoretical methodology has been done. Steam injected diesel engine with EGR has been performed using a combustion model for 20% steam (S20) and 10%...
Alternative diesel fuels for internal combustion engines have grown significantly in interest in the last decade. This is due to the potential benefits in pollutant emissions and particulate matter reduction. Nevertheless at possible increase in nitrogen oxide (NOx), and almost certainly increase of fuel consumption have been observed.In this paper, mineral diesel and RME (rapeseed methyl ester) fuels...
The application of the Miller cycle into the internal combustion engines is proposed to decrease NOx emissions, in the recent years. Another NOx control technique is the steam injection method (SIM). In this study, the application of these methods together into a single cylinder, direct injection diesel engine is experimentally and theoretically performed. Two different Miller cycles, which provide...
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