Experimental Investigation on Biodiesel-Ethanol-Diesel Blends Operating with a Diesel Engine

2013 ◽  
Vol 465-466 ◽  
pp. 221-225 ◽  
Author(s):  
Mohd Hafizil Mat Yasin ◽  
Rizalman Mamat ◽  
Abdul Mutalib Leman ◽  
Amir Khalid ◽  
Noreffendy Tamaldin
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Fuel Consumption ◽  
Engine Speed ◽  
Ethanol Concentration ◽  
Engine Performance ◽  
Operating Conditions ◽  
Brake Specific Fuel Consumption ◽  
Ethanol Blends ◽  
No Emissions

Biodiesel is an alternative, decomposable and biological-processed fuel that has similar characteristics with mineral diesel which can be used directly into diesel engines. However, biodiesel has its drawbacks which are more density and viscosity compared to mineral diesel. Alcohol additives implementation such as ethanol could reduce significantly the density and viscosity of the biodiesel. In this study, biodiesel (20%)-ethanol (5%)-diesel (75%), biodiesel (20%)-methanol (10%)-diesel (70%), biodiesel (20%)-ethanol (15%)-diesel (65%), biodiesel (20%)-ethanol (20%)-diesel (60%) and standard mineral diesel as a baseline fuel are tested in a Mitsubishi 4D68 diesel engine. Those test fuels are investigated under the same operating conditions at three different engine loads; 20%, 40% and 60% at a constant engine speed of 2500 rpm to determine the engine performance, combustion and emission of the diesel engine. Overall, biodiesel-ethanol-diesel blends show higher brake specific fuel consumption than mineral diesel especially at higher ethanol concentration. As ethanol proportions in blends increase, CO emissions increase, while NO emissions are reduced. Also, biodiesel-ethanol blend with 5% ethanol is more effective than other biodiesel-ethanol blends for reducing CO emissions and improve the combustion.

Two-Stroke Marine Diesel Engine Variable Injection Timing System Performance Evaluation and Optimum Setting for Minimum Fuel Consumption at Acceptable NOx Levels

2014 ◽  
Author(s):  
Dimitrios T. Hountalas ◽  
Spiridon Raptotasios ◽  
Antonis Antonopoulos ◽  
Stavros Daniolos ◽  
Iosif Dolaptzis ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Engine Performance ◽  
Operating Conditions ◽  
Specific Fuel Consumption ◽  
Injection Timing ◽  
Nox Emissions ◽  
Pressure Measurements ◽  
Cylinder Pressure ◽  
Start Of Injection

Currently the most promising solution for marine propulsion is the two-stroke low-speed diesel engine. Start of Injection (SOI) is of significant importance for these engines due to its effect on firing pressure and specific fuel consumption. Therefore these engines are usually equipped with Variable Injection Timing (VIT) systems for variation of SOI with load. Proper operation of these systems is essential for both safe engine operation and performance since they are also used to control peak firing pressure. However, it is rather difficult to evaluate the operation of VIT system and determine the required rack settings for a specific SOI angle without using experimental techniques, which are extremely expensive and time consuming. For this reason in the present work it is examined the use of on-board monitoring and diagnosis techniques to overcome this difficulty. The application is conducted on a commercial vessel equipped with a two-stroke engine from which cylinder pressure measurements were acquired. From the processing of measurements acquired at various operating conditions it is determined the relation between VIT rack position and start of injection angle. This is used to evaluate the VIT system condition and determine the required settings to achieve the desired SOI angle. After VIT system tuning, new measurements were acquired from the processing of which results were derived for various operating parameters, i.e. brake power, specific fuel consumption, heat release rate, start of combustion etc. From the comparative evaluation of results before and after VIT adjustment it is revealed an improvement of specific fuel consumption while firing pressure remains within limits. It is thus revealed that the proposed method has the potential to overcome the disadvantages of purely experimental trial and error methods and that its use can result to fuel saving with minimum effort and time. To evaluate the corresponding effect on NOx emissions, as required by Marpol Annex-VI regulation a theoretical investigation is conducted using a multi-zone combustion model. Shop-test and NOx-file data are used to evaluate its ability to predict engine performance and NOx emissions before conducting the investigation. Moreover, the results derived from the on-board cylinder pressure measurements, after VIT system tuning, are used to evaluate the model’s ability to predict the effect of SOI variation on engine performance. Then the simulation model is applied to estimate the impact of SOI advance on NOx emissions. As revealed NOx emissions remain within limits despite the SOI variation (increase).

Characteristics of Water-in-Diesel Emulsions in a Single Cylinder Compression Ignition Engine

2014 ◽  
Author(s):  
Teja Gonguntla ◽  
Robert Raine ◽  
Leigh Ramsey ◽  
Thomas Houlihan
Keyword(s):  
Fuel Consumption ◽  
Direct Injection ◽  
Engine Performance ◽  
Operating Conditions ◽  
Specific Fuel Consumption ◽  
Brake Specific Fuel Consumption ◽  
Compression Ignition Engine ◽  
Oil Emulsion ◽  
Single Cylinder ◽  
Performance And Emission

The objective of this project was to develop both engine performance and emission profiles for two test fuels — a 6% water-in-diesel oil emulsion (DOE-6) fuel and a neat diesel (D100) fuel. The testing was performed on a single cylinder, direct-injection, water-cooled diesel engine coupled to an eddy current dynamometer. Output parameters of the engine were used to calculate Brake Specific Fuel Consumption (BSFC) and Engine Efficiency (η) for each test fuel. DOE-6 fuels generated a 24% reduction in NOX and a 42% reduction in Carbon Monoxide emissions over the tested operating conditions. DOE-6 fuels presented higher ignition delays — between 1°-4°, yielded 1%–12% lower peak cylinder pressures and produced up to 5.5% lower exhaust temperatures. Brake Specific Fuel consumption increased by 6.6% for the DOE-6 fuels as compared to the D100 fuels. This project is the first research done by a New Zealand academic institution on water-in-diesel emulsion fuels.

scholarly journals Effect of cetane improver addition into diesel fuel: Methanol mixtures on performance and emissions at different injection pressures

2017 ◽  
Vol 21 (1 Part B) ◽  
pp. 555-566 ◽  
Author(s):  
Feyyaz Candan ◽  
Murat Ciniviz ◽  
Ilker Ors
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Engine Performance ◽  
Injection Pressure ◽  
Specific Fuel Consumption ◽  
Exhaust Emission ◽  
Brake Specific Fuel Consumption ◽  
Consumption Values ◽  
Smoke Opacity

In this study, methanol in ratios of 5-10-15% were incorporated into diesel fuel with the aim of reducing harmful exhaust gasses of Diesel engine, di-tertbutyl peroxide as cetane improver in a ratio of 1% was added into mixture fuels in order to reduce negative effects of methanol on engine performance parameters, and isobutanol of a ratio of 1% was used as additive for preventing phase separation of all mixtures. As results of experiments conducted on a single cylinder and direct injection Diesel engine, methanol caused the increase of NOx emission while reducing CO, HC, CO2, and smoke opacity emissions. It also reduced torque and power values, and increased brake specific fuel consumption values. Cetane improver increased torque and power values slightly compared to methanol-mixed fuels, and reduced brake specific fuel consumption values. It also affected exhaust emission values positively, excluding smoke opacity. Increase of injector injection pressure affected performances of methanol-mixed fuels positively. It also increased injection pressure and NOx emissions, while reducing other exhaust emissions.

Fundamental Study of Diesel Engine Performance by Implementing Oil from Tropical Kepayang Seeds (Pangium edule)

2015 ◽  
Vol 1115 ◽  
pp. 480-483
Author(s):  
Khairil ◽  
Sulaiman Thalib ◽  
Dan Turmizi
Keyword(s):  
Power Generation ◽  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Engine Speed ◽  
Engine Performance ◽  
The Other ◽  
Biodiesel Fuel ◽  
Fundamental Study ◽  
Tropical Regions

Kepayang is a plant commonly found in tropical regions especially in Aceh, which has not been optimally used by local people. Based on traditional processes, kepayang seeds are potentially capable of producing oil. The objective of this research is to examined the effects of specific fuel consumption, power generation, and the thermal efficiency on engine performance by using kepayang seeds oil. The problem will be evaluated the effect of variations of biodiesel fuel (B-0, B-10 and B-20) and variation engine rotation on the diesel engine performance. In order to perform this research, the Yanmar TS-50 engine which had rotation of 2400 rpm and maximum power of 2 kW was selected. By examining the result of the research it was concluded that there were not significant effects of varied fuel consumption on the low speed (1000 rpm to 1800 rpm) engine rotation. However for engine speed more than 1800 rpm there were somewhat effects of them on engine performance. It is evident that at the engine rotation of 2000 rpm, the fuel consumption of biodiesel (B-20) and the power generated were lower than compare to biodiesel (B-10 and B-0). On the other hand, the thermal efficiency for biodiesel (B-20) was higher than compared to other biodiesel (B-10 and B-0).

scholarly journals Simulation research into the influence of the combustion chamber blowby on the efficiency of a diesel engine

2014 ◽  
Vol 158 (3) ◽  
pp. 73-79
Author(s):  
Grzegorz KOSZAŁKA ◽  
Michał GĘCA ◽  
Andrzej SUCHECKI
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Fuel Consumption ◽  
Engine Speed ◽  
Direct Injection ◽  
Engine Performance ◽  
Technical Condition ◽  
Maximum Torque ◽  
Simulation Research ◽  
Service Lead

Combustion chamber leakage, caused mainly by blowby, results in a reduced engine performance and higher fuel consumption. The blowby rate is, to some extent, determined by the design of the piston-ring-cylinder assembly (PRC) and the blowby rate varies throughout the life of an engine due to wear of the said assembly. The paper presents a quantitative evaluation of the influence of the combustion chamber blowby on the engine performance and fuel consumption on the example of two diesel engines: older generation naturally aspirated indirect injection diesel engine and a modern turbocharged direct injection engine. The assessment was made based on a simulation research using the AVL Boost software and the input data for the calculations were ascertained based on measurements performed on actual objects. The results have shown that a reduction of the blowby by half compared to the values occurring in engines of good technical condition would increase the maximum torque and power by approx. 0.5% for both investigated engines. The results of the simulation have also shown that increases in the blowby occurring in engines after long service lead to increased fuel consumption from 1% to 7% and the lower the engine speed and load the greater theses values.

scholarly journals Effects of bioethanol ultrasonic generated aerosols application on diesel engine performances

2015 ◽  
Vol 19 (6) ◽  
pp. 1931-1941 ◽  
Author(s):  
Florin Mariasiu ◽  
Nicolae Burnete ◽  
Dan Moldovanu ◽  
Bogdan Varga ◽  
Calin Iclodean ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Environmental Protection ◽  
Fuel Consumption ◽  
Engine Performance ◽  
Pollutant Emissions ◽  
Brake Specific Fuel Consumption ◽  
Ultrasound Device ◽  
Different Types ◽  
Performance And Emissions ◽  
Bioethanol Fuel

In this paper the effects of an experimental bioethanol fumigation application using an experimental ultrasound device on performance and emissions of a single cylinder diesel engine have been experimentally investigated. Engine performance and pollutant emissions variations were considered for three different types of fuels (biodiesel, biodiesel-bioethanol blend and biodiesel and fumigated bioethanol). Reductions in brake specific fuel consumption and NOx pollutant emissions are correlated with the use of ultrasonic fumigation of bioethanol fuel, comparative to use of biodiesel-bioethanol blend. Considering the fuel consumption as diesel engine?s main performance parameter, the proposed bioethanol?s fumigation method, offers the possibility to use more efficient renewable biofuels (bioethanol), with immediate effects on environmental protection.

scholarly journals Effects of particle size of cerium oxide nanoparticles on the combustion behavior and exhaust emissions of a diesel engine powered by biodiesel/diesel blend

2021 ◽  
Vol 8 (2) ◽  
pp. 1374-1383
Author(s):  
P. Dinesha ◽  
Shiva Kumar ◽  
Marc A. Rosen
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Cerium Oxide ◽  
Volume Fraction ◽  
Engine Performance ◽  
Ceo2 Nanoparticles ◽  
Specific Fuel Consumption ◽  
Future Research ◽  
Brake Specific Fuel Consumption ◽  
Engine Emissions

Meeting the emission norms specified by governing bodies is one of the major challenges faced by engine manufacturers, especially without sacrificing engine performance and fuel economy. Several methods and techniques are being used globally to reduce engine emissions. Even though emissions can be reduced, doing so usually entails a deterioration in performance. To address this problem, nanoadditives such as cerium oxide (CeO2) nanoparticles are used to reduce engine emissions while improving engine performance. However, some aspects of the application of these nanoadditives are still unknown. In light of that, three sizes of CeO2 nanoparticles (i.e., 10, 30, and 80 nm) and at a constant volume fraction of 80 ppm were added to a 20% blend of waste cooking oil biodiesel and diesel (B20). A single-cylinder diesel engine operating at a 1500 rpm speed and 180 bar fuel injection pressure was used to compare the performance and emission characteristics of the investigated fuel formulations. The results showed that the addition of CeO2 nanoparticles led to performance improvements by reducing brake specific fuel consumption. Moreover, the catalytic action of CeO2 nanoparticles on the hydrocarbons helped achieve effective combustion and reduce the emission of carbon monoxide, unburnt hydrocarbon, oxides of nitrogen, and soot. Interestingly, the size of the nanoadditive played an instrumental role in the improvements achieved, and the use of 30 nm-sized nanoparticles led to the most favorable performance and the lowest engine emissions. More specifically, the fuel formulation harboring 30 nm nanoceria reduced brake specific fuel consumption by 2.5%, NOx emission by 15.7%, and smoke opacity by 34.7%, compared to the additive-free B20. These findings could shed light on the action mechanism of fuel nanoadditives and are expected to pave the way for future research to develop more promising fuel nanoadditives for commercial applications.

EFFECTS OF PALM OIL METHYL ESTER (POME) ON FUEL CONSUMPTION AND EXHAUST EMISSIONS OF DIESEL ENGINE OPERATING WITH BLENDED FUEL (FOSSIL FUEL + JATROPHA OIL METHYL ESTER (JOME))

2015 ◽  
Vol 76 (5) ◽  
Author(s):  
N. R. Abdullah ◽  
Z. Michael ◽  
A. R. Asiah ◽  
A. J. Helmisyah ◽  
S. Buang
Keyword(s):  
Diesel Engine ◽  
Methyl Ester ◽  
Fuel Consumption ◽  
Engine Speed ◽  
Fossil Fuel ◽  
Specific Fuel Consumption ◽  
Brake Specific Fuel Consumption ◽  
Jatropha Oil ◽  
Blended Fuel ◽  
Total Hydrocarbons

Biodiesel is used widely as an alternative fuel for diesel engine due to biodegradable, oxygenated, renewable and compatible with diesel engines . In fact, biodiesel emission has decreased the levels of potentially carcinogenic compounds. However, a certain biodiesel such as Jatropha Oil Methyl Ester (JOME) has resulted in the increase of specific fuel consumption and higher NOx emissions. Therefore, the objective of this study is to investigate the effects of Palm Oil Methyl Ester (POME) in the blended fuel (Fossil fuel + JOME) on the fuel consumption and exhaust emission. Experiments were carried out at a constant engine speed (2000 rpm) with variable of engine loads. Results show that the addition of POME leads to the significant reduction in brake specific fuel consumption (BSFC), Total hydrocarbons (THCs),  carbon monoxide (CO) and nitrogen dioxide (NOx) emissions. This study shows a huge difference for Total hydrocarbons emission of blends with 5% POME compared to blends with 10% and 15% of POME. Carbon monoxide emission for blends with 15% POME is the lowest at constant engine speed with various engine loads which in average is 53% lower than blends of 5% POME. This is because blends with higher percentage of POME has higher cetane number hence shortened the ignition delay resulted  in the lower possibility of formation of rich fuel zone and thus reduces CO emissions.  Moreover, the higher percentage of POME also resulted in lower NOx emission regardless of engine loads. The blends with 15% POME had the lowest NOx emission which is 25% less compared with the blends of 5% POME.  The study recommended that, additional POME to the blended fuel can be considered as a good initiative to improve blended fuel property for diesel engine due to its potential to improve engine emissions and reduce brake specific fuel consumption. In conclusion, the blends of POME into (Fossil fuel + JOME) improves engine emission without significantly increasing fuel consumption.

The Engine Performance Characteristics of an IDI Diesel Engine Fueled by Soybean Oil Methyl Esters

2019 ◽  
Vol 1 (1) ◽  
pp. 19
Author(s):  
A Ghurri ◽  
S K Keun
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Engine Speed ◽  
Methyl Esters ◽  
Engine Performance ◽  
Mechanical Efficiency ◽  
Heating Value ◽  
Lower Heating Value ◽  
The Difference ◽  
Lower Heating

An experimental investigation was conducted to evaluate the performance of anindirect injection (IDI) diesel engine using diesel (D100) and diesel-biodieselblends (BD25, BD45, BD65) separately. The engine was run in various engineloads at constant engine speed ranging from 1000 to 2400 rpm with an interval200 rpm. The results showed that the biodiesel content decreased the enginetorque and power. This might be mainly affected by the lower LHV of thebiodiesel, and also the worse combustion due to higher density of the biodieselcompared to the diesel fuel. The loss of power due to lower heating value ofbiodiesel were not as high as the difference in their heating value that might bedown to the better lubricity of biodiesel as proved in the higher brake thermalefficiency and mechanical efficiency when using the biodiesel blends. The brakespecific fuel consumption is higher with the increase of biodiesel content but thediesel fuel delivered the highest energy to run the engine. The maximum pressureinside cylinder and the heat release rate of D100 is slightly higher than those ofbiodiesel blends.Keywords: diesel engine, biodiesel, engine performance, emission.

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