Impact of Oxidation Inhibitors on Performance and Emission Characteristics of a Low Heat Rejection Engine

2017 ◽  
Vol 8 (4) ◽  
Author(s):  
P.S. Kumar ◽  
S.A. Kannan ◽  
A. Kumar ◽  
K.A.V. Geethan
Keyword(s):  
Combustion Chamber ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Specific Fuel Consumption ◽  
Nox Emission ◽  
Emission Characteristics ◽  
Brake Thermal Efficiency ◽  
Heat Rejection ◽  
Oxidation Inhibitors ◽  
Low Heat Rejection Engine

In this study, for the first time analysis of a low heat rejection engine was carried out along with the addition of oxidation inhibitors. If the combustion chamber components of the engine such as piston, cylinder head, and inlet and outlet valves are insulated with a thermal barrier material, then the engine will be referred as low heat rejection engine. In this study yttria stabilized zirconia was coated on the combustion chamber components for a thickness of about 150 microns. Then the analysis of performance parameters such as brake thermal efficiency and specific fuel consumption and emission characteristics such as emission of carbon monoxide, hydrocarbon and nitrogen oxide was carried out in single cylinder four stroke diesel engine with electrical loading using diesel and pongamia methyl ester as the fuels. The major problem associated with the usage of biodiesels and low heat rejection engine is the increased NOX emission than the normal engine operated with the diesel. This problem has been overcome by the usage of oxidation inhibitors such as ethyl hexyl nitrate (EHN), tert-butyl hydroquinone (TBHQ). The results showed that addition of oxidation inhibitors leads to increase in brake thermal efficiency, reduced specific fuel consumption and reduced NOX emission.

scholarly journals EXPERIMENTAL ANALYSIS OF THE COMBUSTION CHAMBER COATED WITH Mo AND Al2O3-TiO2 IN A DIESEL ENGINE

2021 ◽  
Vol 55 (4) ◽  
Author(s):  
Murugan Kuppusamy ◽  
Thirumalai Ramanathan ◽  
Udhayakumar Krishnavel ◽  
Seenivasan Murugesan
Keyword(s):  
Combustion Chamber ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Performance Test ◽  
Ceramic Powder ◽  
Specific Fuel Consumption ◽  
Emission Characteristic ◽  
Powder Materials ◽  
Brake Specific Fuel Consumption ◽  
Brake Thermal Efficiency

The effect of thermal-barrier coatings (TBCs) reduces fuel consumption, effectively improving the engine efficiency. This research focused on a TBC with a thickness of 300 µm insulating the combustion chamber of a direct ignition (DI) engine. The piston crown, inlet and exhaust-valve head were coated using air-plasma-spray coating. Ceramic powder materials such as molybdenum (Mo) and aluminum oxide titanium dioxide (Al2O3-TiO2) were used. A performance test of the engine with the coated combustion chamber was carried out to investigate the brake power, brake thermal efficiency, volumetric efficiency, brake specific fuel consumption and air-fuel ratio. Also, an emission-characteristic test was carried out to investigate the emissions of unburned hydrocarbon (HC), carbon monoxide (CO), nitrogen oxides (NO, NO2, NO3) and smoke opacity (SO). The results reveal that the brake thermal efficiency and brake specific fuel consumption show significant increases because of these coating materials. The effect of the Al2O3-TiO2 coating significantly reduces the HC and CO engine emissions.

scholarly journals An Assessment on Performance Characteristics of Diesel Engine Using Lemongrass-Diesel Oil Fuel Blends

2021 ◽  
Author(s):  
Naveen Rana ◽  
Harikrishna Nagwan ◽  
Kannan Manickam
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Thermal Efficiency ◽  
Specific Fuel Consumption ◽  
Performance Characteristics ◽  
Emission Characteristics ◽  
Brake Specific Fuel Consumption ◽  
Brake Thermal Efficiency ◽  
Fuel Blends

Abstract Indeed, the development of alternative fuels for use in internal combustion engines has become an essential requirement to meet the energy demand and to deal with the different problems related to fuel. The research in this domain leads to the identification of adverse fuel properties and for their solution standard limits are being defined. This paper outlines an investigation of performance and combustion characteristics of a 4-stroke diesel engine using different cymbopogon (lemongrass) - diesel fuel blends. 10% to 40% cymbopogon is mixed with diesel fuel and tested for performance characteristics like brake specific fuel consumption and brake thermal efficiency. To obtain emission characteristics smoke density in the terms of HSU has been measured. In result, it has observed that there is an increase of 5% in brake thermal efficiency and 16.33% decrease in brake specific fuel consumption. Regarding emission characteristics, a 12.9% decrease in smoke emission has been found.

Performance, Combustion and Emission Analysis for Various Combustion Chamber Geometry

2014 ◽  
Vol 984-985 ◽  
pp. 950-956
Author(s):  
S. Arumugam ◽  
N. Vasudevan ◽  
P. Saravanan ◽  
K. Pitchandi
Keyword(s):  
Combustion Chamber ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Specific Fuel Consumption ◽  
Oxides Of Nitrogen ◽  
Emission Analysis ◽  
Maximum Heat ◽  
Brake Thermal Efficiency ◽  
Performance And Emissions ◽  
Toroidal Chamber

The experimental work investigates performance, combustion and emission analysis for various combustion chamber geometry such as combustion, brake thermal efficiency, specific fuel consumption, and emission characteristics. The various combustion chamber namely Spherical chamber (SC), Toroidal chamber (TC), Re-entrant chamber (RC) were fitted in a 4.4 kW single cylinder air cooled Compression ignition (CI) engine and tests were conducted with standard diesel. The investigated of the combustion chamber geometry characteristics on combustion, performance and emissions. This investigation shows brake thermal efficiency for Re-entrant chamber and Toroidal chamber is slightly higher than Spherical chamber. And lower specific fuel consumption of Toroidal chamber, Re-entrant chamber than that of Spherical chamber. The enhancement in reduction of carbon monoxide, hydrocarbon is recorded for Re-entrant chamber compared to the Toroidal chamber and Spherical chamber. Oxides of nitrogen are reduced for Re-entrant chamber and Toroidal chamber than that of Spherical chamber. Combustion characteristics improved for Re-entrant chamber compared to Spherical chamber. The cylinder pressure for Re-entrant chamber and Toroidal chamber is higher than that of Spherical chamber. Also obtained maximum heat release rate for Re-entrant chamber than Toroidal chamber and Spherical chamber.

An Experimental Investigation on Performance, Combustion and Emission Characteristics of a Low Heat Rejection Engine Using Diesel and Diethyl Ether Blends

2017 ◽  
Author(s):  
Krishnamani Selvaraj ◽  
Mohanraj Thangavel ◽  
Ravikumar Bikramsingh
Keyword(s):  
Diethyl Ether ◽  
Thermal Efficiency ◽  
Waste Heat ◽  
Cooling System ◽  
Research Work ◽  
Load Condition ◽  
Emission Characteristics ◽  
Brake Thermal Efficiency ◽  
Heat Rejection ◽  
Low Heat Rejection Engine

This research work investigates the performance, combustion and emission characteristics of a low heat rejection engine operated on diesel and diethyl ether blends. The combustion chamber walls of the diesel engine insulated by ceramic material were referred to as low heat rejection (LHR) engine. In the LHR engine, an improvement in fuel economy would be obtained by recovering the waste heat rejected to the cooling system as useful work. Initially, the diesel fuel was tested in the conventional engine as a baseline reading for comparison. Then the engine was insulated by coating the engine components of the piston crown and the cylinder liner with aluminum titanate using plasma spray method. In this work, the experiments are conducted using diesel and diethyl ether blends in a conventional and low heat rejection engine at constant speed condition. The experimental results indicate that the brake thermal efficiency increases with increased percentage of diethyl ether in the blends. The maximum brake thermal efficiency was found to be 33.24% for LHR engine using diesel-diethyl ether blend (Diesel 85% & Diethyl ether 15% by volume) at full load condition. The emissions of carbon monoxide and hydrocarbon are decreased due to better combustion characteristics and higher NOx emissions are observed with low heat rejection engine (LHR) compared to the conventional engine using diesel and blended fuels.

scholarly journals Performance and Emission Characteristics of a Four Stroke Spark Ignition Engine with Recirculation of Hot and Cold Exhaust Gases

2018 ◽  
Vol 7 (4.5) ◽  
pp. 405
Author(s):  
Aritra Ganguly ◽  
Baidya Nath Murmu ◽  
Somnath Chakrabarti
Keyword(s):  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Specific Fuel Consumption ◽  
Intake Manifold ◽  
Emission Characteristics ◽  
Exhaust Gas ◽  
Brake Specific Fuel Consumption ◽  
Brake Thermal Efficiency

An experiment has been conducted on a four-stroke, four-cylinder spark ignition engine with and without recirculation of exhaust gas for different loads at a constant speed. Two cases were considered, the first in which 10% and later 20% of the exhaust gas was directly supplied to the intake manifold at a temperature of 820°C, while in the second case the same proportions of exhaust gas were cooled in a heat-exchanger to a temperature of 210°C before supply. Engine performance parameters like brake specific fuel consumption, brake thermal efficiency were evaluated under those conditions and compared with the same engine operating without recirculation. The corresponding emission characteristics of the engine were also measured using an exhaust gas analyzer which measured the amount of NOx, CO, CO2 and un-burnt HC. The performance and emissions characteristics of the engine obtained with hot and cold EGR were compared with reference to the same engine operating without EGR. The study revealed that the performance of the engine was better in terms of brake thermal efficiency and brake specific fuel consumption with cold EGR compared to hot EGR. However, the emissions of CO and HC were higher with cold EGR compared to that of hot EGR.   

The Comparative Trail Research on the Performance of a Diesel Engine Fuelled with Diesel Fuel and Biodiesel/Diesel Blended Fuel

2011 ◽  
Vol 142 ◽  
pp. 103-106
Author(s):  
Wen Ming Cheng ◽  
Hui Xie ◽  
Gang Li
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Thermal Efficiency ◽  
Specific Fuel Consumption ◽  
Brake Specific Fuel Consumption ◽  
Brake Thermal Efficiency ◽  
Series Of Experiments ◽  
Blended Fuel ◽  
Load Conditions

This paper discusses the brake specific fuel consumption and brake thermal efficiency of a diesel engine using cottonseed biodiesel blended with diesel fuel. A series of experiments were conducted for the various blends under varying load conditions at a speed of 1500 rpm and 2500 rpm and the results were compared with the neat diesel. From the results, it is found that the brake specific fuel consumption of cottonseed biodiesel is slightly higher than that of diesel fuel at different engine loads and speeds, with this increase being higher the higher the percentage of the biodiesel in the blend. And the brake thermal efficiency of cottonseed biodiesel is nearly similar to that of diesel fuel at different engine loads and speeds. From the investigation, it is concluded that cottonseed biodiesl can be directly used in diesel engines without any modifications, at least in small blending ratios.

scholarly journals Development of Electrically Aerated Stove for Pyrolyzed Briquettes

2020 ◽  
pp. 37-43
Author(s):  
O. K. Fadele ◽  
M. B. Usman ◽  
O. C. Ariyo ◽  
U. U. Emeghara ◽  
D. O. Adelani ◽  
...  
Keyword(s):  
Combustion Chamber ◽  
Burning Rate ◽  
Fuel Consumption ◽  
Power Output ◽  
Thermal Efficiency ◽  
Thermal Parameters ◽  
Specific Fuel Consumption ◽  
Mean Values ◽  
Wood Shavings ◽  
The Mean

In this study, an electrically aerated stove was developed using locally available materials. The performance of the stove was evaluated by utilizing briquettes produced from pyrolyzed jatropha shell and Eucalyptus camadulensis wood shavings. Thermal parameters such as thermal efficiency, power output, specific fuel consumption and burning rate were determined. The mean values obtained for the thermal efficiency, power output, specific fuel consumption and burning rate were 7.62 %, 1685 J/s, 0.2377 g/g, 330.90 g/hr respectively. The performance of the briquette stove was considered to not be suboptimal. The thermal efficiency can further be improved by proper insulation and adequate utilization of the heat generated in the combustion chamber.

scholarly journals PERFORMANCE AND EMISSIONS OF C.I. ENGINE USING BLENDS OF BIODIESEL AND DIESEL AT DIFFERENT INJECTION PRESSURES

2013 ◽  
pp. 148-153
Author(s):  
H. M. DHARMADHIKARI ◽  
PULI RAVI KUMAR ◽  
S. SRINIVASA RAO
Keyword(s):  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Injection Pressure ◽  
Petroleum Products ◽  
Specific Fuel Consumption ◽  
Oxides Of Nitrogen ◽  
Suitable Alternative ◽  
Brake Thermal Efficiency ◽  
Performance And Emissions ◽  
Injection Pressures

In recent years, much research has been carried to find suitable alternative fuel to petroleum products. In the present investigation experimental work has been carried out to analyze the performance and emissions characteristics of a single cylinder compression ignition DI engine fuelled with the blends of mineral diesel and biodiesel at the different injection pressures. The optimal value of the injection pressure was observed as 200 bar in the range of 180 to 220 bar. The performance parameters evaluated were brake thermal efficiency, break specific fuel consumption and the emissions measured were carbon monoxide (CO), carbon dioxide (CO2), hydrocarbon (HC), and oxides of nitrogen (NOx). The results of experimental investigation with biodiesel blends with diesel are compared with that of diesel. The results indicated that the CO emissions are slightly less, HC emissions were also observed to be less for B10 and B20, and NOx emissions decreased by 39 % for B10 and 28 % for B20 compared with B100. The brake thermal efficiency of the engine decreased around 6% for all blends in comparison with diesel, and the break specific fuel consumption was slightly more for B10 and B20.

scholarly journals Performance and Emission Analysis of CIDI Engine Fueled with Palm Biodiesel Blends and Nano Particles

2019 ◽  
Vol 9 (2) ◽  
pp. 640-646
Keyword(s):  
Methyl Ester ◽  
Fuel Consumption ◽  
Palm Oil ◽  
Diesel Fuel ◽  
Thermal Efficiency ◽  
Nano Particles ◽  
Emission Characteristics ◽  
Emission Analysis ◽  
Brake Thermal Efficiency ◽  
Biodiesel Blends

The diesel fuel is most extensively used fossil fuel in automotives and a single major source of hazardous environment pollutant across the globe. As of late, the exploration thinks about distinguished that plant based biodiesel are turning into a promising option sustainable fuel and the consumable/non-eatable oils and creature fats can be utilized feed-stock in arrangement of biodiesel, in light of the fact that its chemical properties practically like fossil diesel fuel, non-poisonous, clean consuming and inexhaustible source. In this work, the performance analysis and emission characteristics of single cylinder, 4-stroke, and water cooled diesel engine was carried-out using Palm oil methyl ester as biodiesel alternative to diesel fuel. Experimental tests have been conducted with range of engine loads using palm oil methyl ester (PME) and its diesel blends with biodiesel in the ratio of 10:90 (B10), 20:80 (B20), and 30:70 (B30), 40:60 (B40), PME 100% (B100) and petro-diesel 100% by volume with and without antimony tin oxide (ATO) additive. In this research work brake power (BP), brake thermal efficiency (BTE), brake specific fuel consumption (BSFC), fuel consumption (FC) are considered as engine performance characteristics and carbon monox ide (CO), hydro carbons (HC), oxides of nitrogen (NOx) are considered as emission characteristics. The experimental results revealed that B10 blend of biodiesel has comparable brake thermal efficiency as diesel. B10 has lowest and B100 has highest BSFC, FC among all the biodiesel blends and biodiesel has lower CO emission, lower HC emission and moderately higher NOx emission when compared with diesel. B10 has shown comparable performance as diesel and it can be considered as alternative to diesel fuel.

scholarly journals An Experimental Study on the Performance Characteristics of a Diesel Engine Fueled with ULSD-Biodiesel Blends

2020 ◽  
Vol 10 (2) ◽  
pp. 183-190
Author(s):  
Viet Dung Tran ◽  
Anh Tuan Le ◽  
Anh Tuan Hoang
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Cooling System ◽  
Specific Fuel Consumption ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Brake Thermal Efficiency ◽  
Exhaust Gas Temperature ◽  
Low Sulfur

As a rule, the highest permissible sulfur content in the marine fuel must drop below 0.5% from 1 January 2020 for global fleets. As such, ships operating in emission control areas must use low sulfur or non-sulfur fuel to limit sulfur emissions as a source of acid rain. However, that fact has revealed two challenges for the operating fleet: the very high cost of ultra-low sulfur diesel (ULSD) and the installation of the fuel conversion system and the ULSD cooling system. Therefore, a solution that blends ULSD and biodiesel (BO) into a homogeneous fuel with properties equivalent to that of mineral fuels is considered to be significantly effective. In the current work, an advanced ultrasonic energy blending technology has been applied to assist in the production of homogeneous ULSD-BO blends (ULSD, B10, B20, B30, and B50 with blends of coconut oil methyl ester with ULSD of 10%, 20%, 30% and 50% by volume) which is supplied to a small marine diesel engine on a dynamo test bench to evaluate the power and torque characteristics, also to consider the effect of BO fuel on specific fuel consumption exhaust gas temperature and brake thermal efficiency. The use of the ultrasonic mixing system has yielded impressive results for the homogeneous blend of ULSD and BO, which has contributed to improved combustion quality and thermal efficiency. The results have shown that the power, torque, and the exhaust gas temperature, decrease by approximately 9%, 2%, and 4% respectively with regarding the increase of the blended biodiesel rate while the specific fuel consumption and brake thermal efficiency tends to increase of around 6% and 11% with those blending ratios.

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