scholarly journals On-line mixing and emission characteristics of diesel engine with dimethyl ether injected into fuel pipeline

2017 ◽  
Vol 21 (1 Part B) ◽  
pp. 627-638
Author(s):  
Xiaolu Li ◽  
Xiaomin Fang ◽  
Liyun Lao ◽  
Lijun Xu ◽  
Lijuan Qian
Keyword(s):  
Dimethyl Ether ◽  
Diesel Fuel ◽  
Direct Injection ◽  
Fuel Pump ◽  
Mixing Ratios ◽  
On Line ◽  
Mixing Method ◽  
Hc Emissions ◽  
Power Outputs ◽  
Engine Operating Condition

This article presents a new on-line dimethyl ether/diesel mixing method, researches its blend characteristics, and also validates combustion and emission effects on a light-duty direct injection engine. This new blend concept is that dimethyl ether is injected into the fuel pipeline to mix with local diesel as the injector stops injection, and this mixing method has some advantages, such as utilization of the original fuel system to mix dimethyl ether with diesel intensively, flexibility on adjustable mixing ratio varying with the engine operating condition, and so on. A device was designed to separate dimethyl ether from the blends, and its mixing ratios and injection quantity per cycle were also measured on a fuel pump bench. The results show that compared with the injected diesel, the percentages of dimethyl ether injected into fuel pipeline are 13.04, 9.74, 8.55, and 7.82% by mass as the fuel pump speeds increase, while dimethyl ether injected into fuel pipeline are 45.46, 35.53, 31.45, and 28.29% of wasting dimethyl ether. The power outputs of engine fueled with the blends are slight higher than those of neat diesel at low speeds, while at high speeds, its power outputs are a little lower. Smoke emissions of the blends are lower about 30% than that of neat diesel fuel at medium and high loads with hardly any penalty on smoke and NOx emissions at light loads. The NOx and HC emissions of the blends are slight lower than that of neat diesel fuel at all loads.

Performance of a direct injection diesel engine fuelled with a dimethyl ether/diesel blend

2003 ◽  
Vol 217 (9) ◽  
pp. 819-824 ◽  
Author(s):  
Wang Hewu ◽  
Zhou Longbao
Keyword(s):  
Diesel Engine ◽  
Dimethyl Ether ◽  
Engine Speed ◽  
Direct Injection ◽  
Test Results ◽  
Di Diesel Engine ◽  
Hc Emissions ◽  
Blend Fuel ◽  
Co Emission ◽  
Diesel Operation

A quantity of 10 per cent dimethyl ether (DME) was added to diesel fuel, and an investigation of the performance of a direct injection (DI) diesel engine fuelled with blend fuel was carried out. The test results showed that, in comparison with diesel operation, the torque at low engine speed was increased; the brake specific fuel consumption (b.s.f.c.) with speed characteristics at full load was reduced by 20 g/kW h on average; the smoke was reduced significantly, and the coeffcient of light absorption of smoke decreased by 50 per cent; the NOx and HC emissions were also clearly reduced, and the CO emission was at the same level as that of a diesel engine.

scholarly journals Performance, emission and combustion characteristics of a direct injection diesel engine using blends of punnai oil biodiesel and diesel as fuel

2020 ◽  
Vol 24 (1 Part A) ◽  
pp. 13-25 ◽  
Author(s):  
Bibin Chidambaranathan ◽  
P. Seenikannan ◽  
P.K. Devan
Keyword(s):  
Fatty Acids ◽  
Diesel Engine ◽  
Methyl Ester ◽  
Diesel Fuel ◽  
Direct Injection ◽  
Combustion Characteristics ◽  
Direct Injection Diesel Engine ◽  
Chromatography Analysis ◽  
Gas Chromatography Analysis ◽  
Hc Emissions

Fast-growing demand for automobile vehicles and depletion of fossil fuel forced the researchers to think for alternative fuel which can replace the diesel fuel. From this perspective, Punnai oil which is non-edible in nature is chosen as a feedstock for producing methyl ester. Punnai oil can be converted into biodiesel/methyl ester by transesterification process. From gas chromatography analysis it is found that biodiesel of Punnai oil contains linoleic, oleic and palmitic fatty acids. Presence of these fatty acids and in the Punnai oil biodiesel will enhance the combustion characteristics. To ascertain the suitability of Punnai oil biodiesel as a fuel for direct injection Diesel engine, the experimental work was carried out using a constant speed, four-stroke single-cylinder Diesel engine. Experimental results show that there is a decrease in brake thermal efficiency and an increase in NOx and CO2 emissions with increased concentration of biodiesel in the blend. Smoke, CO, and HC emissions were reduced significantly. At rated power, brake thermal efficiencies of diesel, B20, B40, B60, and B80 are 29.2%, 28.6%, 28.1%, 27.5%, and 27%, respectively, and NOx emissions are in the order of 1516 ppm, 1547 ppm, 1553 ppm, 1567 ppm, and 1631 ppm. Smoke emission for diesel fuel was 50% whereas for B20, B40, B60, and B80, smoke emissions were 48%, 45%, 44%, and 43%. The same trend was observed for hydrocarbon emissions. Combustion characteristics of B20 blend closely follow the trend of diesel fuel. The maximum cylinder pressure of diesel and B20 are 68.3 bar and 67 bar, respectively, and maxi-mum heat release rate of diesel and B20 are 56 kJ/m3 oCA and 54 kJ/m3 oCA, respectively.

scholarly journals An experimental study of the combusition and emission performances of 2,5-dimethylfuran diesel blends on a diesel engine

2017 ◽  
Vol 21 (1 Part B) ◽  
pp. 543-553 ◽  
Author(s):  
Helin Xiao ◽  
Pengfei Zeng ◽  
Liangrui Zhao ◽  
Zhongzhao Li ◽  
Xiaowei Fu
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Direct Injection ◽  
Operating Conditions ◽  
Effective Pressure ◽  
Compression Ignition Engine ◽  
Brake Mean Effective Pressure ◽  
Combustion Duration ◽  
Significant Difference ◽  
Hc Emissions

Experiments were carried out in a direct injection compression ignition engine fueled with diesel-dimethylfuran blends. The combustion and emission performances of diesel-dimethylfuran blends were investigated under various loads ranging from 0.13 to 1.13 MPa brake mean effective pressure, and a constant speed of 1800 rpm. Results indicate that diesel-dimethylfuran blends have different combustion performance and produce longer ignition delay and shorter combustion duration compared with pure diesel. Moreover, a slight increase of brake specific fuel consumption and brake thermal efficiency occurs when a Diesel engine operates with blended fuels, rather than diesel fuel. Diesel-dimethylfuran blends could lead to higher NOx emissions at medium and high engine loads. However, there is a significant reduction in soot emission when engines are fueled with diesel-dimethylfuran blends. Soot emissions under each operating conditions are similar and close to zero except for D40 at 0.13 MPa brake mean effective pressure. The total number and mean geometric diameter of emitted particles from diesel-dimethylfuran blends are lower than pure diesel. The tested fuels exhibit no significant difference in either CO or HC emissions at medium and high engine loads. Nevertheless, diesel fuel produces the lowest CO emission and higher HC emission at low loads of 0.13 to 0.38 MPa brake mean effective pressure.

scholarly journals Performance analysis of a biodiesel fuelled diesel engine with the effect of alumina coated piston

2017 ◽  
Vol 21 (1 Part B) ◽  
pp. 489-498 ◽  
Author(s):  
Kumar Senthil ◽  
Krishnan Purushothaman ◽  
Kuppusamy Rajan
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Alternative Fuels ◽  
Direct Injection ◽  
Pressure Rise ◽  
Plasma Coating ◽  
Thermal Barrier ◽  
Rubber Seed Oil ◽  
Performance And Emission ◽  
Hc Emissions

Biodiesel is one of the best alternative fuels to Diesel engine among other sources due to having potential to reduce emissions. Biodiesel is a renewable, biodegradable and environment friendly fuel in nature. The advantages of biodiesel are lower exhaust gas emissions and its biodegradability and renewability compared with petroleum-based diesel fuel. The energy of the biodiesel can be released more efficiently with the concept of semi adiabatic (thermal barrier coated piston) engine. The objective of this study is to investigate the performance and emission characteristics of a single cylinder direct injection Diesel engine using 25% biodiesel blend (rubber seed oil methyl ester) as fuel with thermal barrier coated piston. Initially the piston crown was coated with alumina (Al2O3) of thickness of 300 micron (0.3 mm) by plasma coating method. The results revealed that the brake thermal efficiency was increased by 4% and brake specific fuel consumption was decreased by 9% for B25 with coated piston compared to un-coated piston with diesel. The smoke, CO, and HC emissions were also decreased for B25 blend with coated piston compared with the uncoated piton engine. The combustion characteristics such as peak pressure, maximum rate of pressure rise, and heat release rate were increased and the ignition delay was decreased for B25 blend for the coated piston compared with diesel fuel.

scholarly journals Exhaust Emissions of a Medium Power Diesel Engine Operated with Biodiesel

2013 ◽  
Vol 8-9 ◽  
pp. 93-102 ◽  
Author(s):  
Nicolae Cordos ◽  
Adrian Todorut ◽  
István Barabás
Keyword(s):  
Diesel Fuel ◽  
Rapeseed Oil ◽  
Direct Injection ◽  
Cetane Number ◽  
Oxidation Stability ◽  
Acid Value ◽  
Hydrocarbon Emissions ◽  
Coke Content ◽  
Hc Emissions ◽  
Experimental Researches

The purpose of this study was to identify from experimental researches the results regarding the nitrogen oxides (NOx) emissions and hydrocarbon emissions (HC), emissions of a four-stroke, four cylinder, direct injection of a Romanian medium power diesel tractor engine at partial loads operating on diesel fuel (DF), rapeseed methyl ester (RME), degummed and filtered (5 μm) pure rapeseed oil (RO100) and its blends with diesel fuel: 20% pure rapeseed oil-80% diesel fuel (RO20), 50% pure rapeseed oil-50% diesel fuel (RO50), 75% pure rapeseed oil-25% diesel fuel (RO75) compared to diesel fuel. The main properties of the tested fuels (density, kinematic viscosity, oxidation stability, acid value, peroxide number, coke content, water content and cetane number) have been determined. The value of NOx emissions for the experimented biofuels is smaller up to 53% (for RO100) and increases up to 37% (for RO75) for different engine loads as compared to the diesel fuel. The HC emission shows a decrease for all biofuels used in the experiment ranging between 4% (for RO100) and 63% (RO75) at different loads relative to the diesel fuel.

Emission Characteristics of Diesel Engines Fuelled with Blended Biodiesels

2020 ◽  
Vol 12 (3) ◽  
Author(s):  
T. Karthik
Keyword(s):  
Methyl Ester ◽  
Fish Oil ◽  
Diesel Fuel ◽  
Direct Injection ◽  
Coconut Oil ◽  
Engine Emissions ◽  
Oil Blends ◽  
Two Samples ◽  
Hc Emissions ◽  
Blended Fuels

The present work investigates the engine emissions characteristics for direct injection diesel engine using coconut biodiesel, soya bean methyl ester and fish oil blends without any engine modifications. The coconut oil has three fuel samples, such as DF (100% diesel fuel), CB5 (5% coconut biodiesel and 95% DF), and CB15 (15% CB and 85% DF) respectively are used. Lower HC and CO, and higher CO2 and NOx emissions have been found for biodiesel blended fuels in comparison with the different blends of a soybean methyl ester (SME) with diesel fuel. There are two samples of SME oils such as B20 SME and B100 SME are used. The measured CO emissions of B20% SME and B100% SME were found to be 11.36% and 41.7% lower than that of diesel fuel. The various blends of fish-oil biodiesel with diesel, B25, B50, B75, B100 were used in the experiment. At full load, B100 fuel produced higher smoke, NOx, CO and HC emissions of 34.95%, 1.65%, 14.6%, and 1.8% respectively with reference to diesel fuel.

scholarly journals Performance, emission and combustion analysis of a compression ignition engine using biofuel blends

2017 ◽  
Vol 21 (1 Part B) ◽  
pp. 511-522 ◽  
Author(s):  
Ilker Ors ◽  
Ali Kahraman ◽  
Murat Ciniviz
Keyword(s):  
Diesel Fuel ◽  
Direct Injection ◽  
Compression Ignition ◽  
Combustion Analysis ◽  
Binary Blend ◽  
Compression Ignition Engine ◽  
Hc Emissions ◽  
Smoke Opacity ◽  
High Level ◽  
No Emissions

This study aimed to investigate the effects on performance, emission, and combustion characteristics of adding biodiesel and bioethanol to diesel fuel. Diesel fuel and blend fuels were tested in a water-cooled compression ignition engine with direct injection. Test results showed that brake specific fuel consumption and volumetric efficiency increased by about 30.6% and 3.7%, respectively, with the addition of bioethanol to binary blend fuels. The results of the blend fuel?s combustion analysis were similar to the diesel fuel?s results. Bioethanol increased maximal in-cylinder pressure compared to biodiesel and diesel fuel at both 1400 rpm and 2800 rpm. Emissions of CO increased by an amount of about 80% for fuels containing a high level of bioethanol when compared to CO emissions for diesel fuel. Using biodiesel, NO emissions increased by an average of 31.3%, HC emissions decreased by an average of 39.25%, and smoke opacity decreased by an average of 6.5% when compared with diesel fuel. In addition, when using bioethanol, NO emissions and smoke opacity decreased by 55% and 17% on average, respectively, and HC emissions increased by an average of 53% compared with diesel fuel.

Performances and Emissions of a DI Supercharged Diesel Engine Fuelled with Soybean Biodiesel and its Blends

2012 ◽  
Vol 512-515 ◽  
pp. 545-551
Author(s):  
Zhi Yi Ma ◽  
Chun Hua Zhang ◽  
Yang Yang Li ◽  
Jian Tong Song
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Specific Energy Consumption ◽  
Power Performance ◽  
Soybean Biodiesel ◽  
Di Diesel Engine ◽  
Hc Emissions ◽  
Power Outputs ◽  
Optimum Solution ◽  
Fuel Consumption And Emissions

Biodiesel is one kind of renewable fuel produced from biomass oil. To optimize the application of biodiesel on vehicle diesel engines, we conducted the tests on a four cylinder turbocharged direct injection (DI) diesel engine fuelled with biodiesel-diesel blends of different ratios, measured their power outputs, fuel consumption and emissions, and compared with those of diesel fuel. Experimental results show that fuelled with biodiesel, at external characteristics (speed characteristics of full load), the power performance is almost the same, brake specific energy consumption (BSEC) decreases, smoke and HC emissions decrease, and NOx and CO emissions increase; at load characteristics, BSEC decreases, smoke emission decreases at high loads and keeps almost no change at low and middle loads, NOx emission increases, HC emission decreases at low and middle loads and keeps the same at high loads, and CO emission maintains the same. B20 (biodiesel content of 20%) is an optimum solution for vehicle engines under comprehensive analysis of performances and emissions.

Engine Performance with Diesel-Biodiesel Blends Fuel and Emission Characteristics

2020 ◽  
Vol 38 (5A) ◽  
pp. 779-788
Author(s):  
Marwa N. Kareem ◽  
Adel M. Salih
Keyword(s):  
Sulfur Content ◽  
Diesel Fuel ◽  
Engine Performance ◽  
Esterification Reaction ◽  
Biodiesel Fuel ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Biodiesel Blends ◽  
Fuel Blends ◽  
Hc Emissions

In this study, the sunflowers oil was utilized as for producing biodiesel via a chemical operation, which is called trans-esterification reaction. Iraqi diesel fuel suffers from high sulfur content, which makes it one of the worst fuels in the world. This study is an attempt to improve the fuel specifications by reducing the sulfur content of the addition of biodiesel fuel to diesel where this fuel is free of sulfur and has a thermal energy that approaches to diesel.20%, 30% and 50% of Biodiesel fuel were added to the conventional diesel. Performance tests and pollutants of a four-stroke single-cylinder diesel engine were performed. The results indicated that the brake thermal efficiency a decreased by (4%, 16%, and 22%) for the B20, B30 and B50, respectively. The increase in specific fuel consumption was (60%, 33%, and 11%) for the B50, B30, and B20 fuels, respectively for the used fuel blends compared to neat diesel fuel. The engine exhaust gas emissions measures manifested a decreased of CO and HC were CO decreased by (13%), (39%) and (52%), and the HC emissions were lower by (6.3%), (32%), and (46%) for B20, B30 and B50 respectively, compared to diesel fuel. The reduction of exhaust gas temperature was (7%), (14%), and (32%) for B20, B30 and B50 respectively. The NOx emission increased with the increase in biodiesel blends ratio. For B50, the raise was (29.5%) in comparison with diesel fuel while for B30 and B20, the raise in the emissions of NOx was (18%) and...

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