Renewable Fuel Performance in a Legacy Military Diesel Engine

2011 ◽  
Author(s):  
Leonard J. Hamilton ◽  
Sherry A. Williams ◽  
Richard A. Kamin ◽  
Matthew A. Carr ◽  
Patrick A. Caton ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Vegetable Oil ◽  
Ignition Delay ◽  
Jet Fuel ◽  
Combustion Characteristics ◽  
Load Range ◽  
Engine Torque ◽  
Brake Torque ◽  
Renewable Fuel

A new Hydrotreated Vegetable Oil (HVO) from the camelina plant has been processed into a Hydrotreated Renewable Jet (HRJ) fuel. This HRJ fuel was tested in an extensively instrumented legacy military diesel engine along with conventional Navy jet fuel JP-5. Both fuels performed well across the speed-load range of this HMMWV engine. The high cetane value of the HRJ leads to modestly shorter ignition delay. The longer ignition delay of JP-5 delivers shorter overall combustion durations, with associated higher indicated engine torque levels. Both brake torque and brake fuel consumption are better with conventional JP-5 by up to ten percent, due to more ideal combustion characteristics.

Hydrotreated Algae Renewable Fuel Performance in a Military Diesel Engine

2012 ◽  
Author(s):  
Patrick A. Caton ◽  
Sherry A. Williams ◽  
Richard A. Kamin ◽  
Dianne Luning-Prak ◽  
Leonard J. Hamilton ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Diesel Engine ◽  
Fuel Consumption ◽  
Vegetable Oil ◽  
Diesel Fuel ◽  
Renewable Diesel ◽  
Load Range ◽  
Brake Torque ◽  
Renewable Fuel ◽  
Engine Efficiency

A vegetable oil from algae has been processed into a Hydrotreated Renewable Diesel (HRD) fuel. This HRD fuel was tested in an extensively instrumented legacy military diesel engine along with conventional Navy diesel fuel. Both fuels performed well across the speed-load range of this HMMWV engine. The high cetane value of the HRD (77 v. 43) leads to significantly shorter ignition delays with associated longer combustion durations and modestly lower peak cylinder pressures as compared to diesel fuel operation. Both brake torque and brake fuel consumption are better (5–10%) with HRD due to the cumulative IMEP effect with moderatly longer combustion durations. Carbon dioxide emmisions are considerably lower with HRD due to the improved engine efficiency as well the more advantageous hydrogen-carbon ratio of this HRD fuel.

805 Combustion Characteristics of a Dual Fuel Diesel Engine with Vegetable Oil

2008 ◽  
Vol 2008.45 (0) ◽  
pp. 255-256
Author(s):  
Yuya UEDA ◽  
Eiji KINOSHITA ◽  
Yasufumi YOSHIMOTO ◽  
Yu UEDA
Keyword(s):  
Diesel Engine ◽  
Vegetable Oil ◽  
Combustion Characteristics ◽  
Dual Fuel

scholarly journals Performance and emissions of a single cylinder diesel engine operating with rapeseed oil and jp-8 fuel blends

2015 ◽  
Vol 162 (3) ◽  
pp. 13-18
Author(s):  
Gvidonas Labeckas ◽  
Irena Kanapkienė
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Rapeseed Oil ◽  
Jet Fuel ◽  
Brake Specific Fuel Consumption ◽  
Test Results ◽  
Brake Thermal Efficiency ◽  
Engine Load ◽  
Fuel Blends

The article presents experimental test results of a DI single-cylinder, air-cooled diesel engine FL 511 operating with the normal (class 2) diesel fuel (DF), rapeseed oil (RO) and its 10%, 20% and 30% (v/v) blends with aviation-turbine fuel JP-8 (NATO code F-34). The purpose of the research was to analyse the effects of using various rapeseed oil and jet fuel RO90, RO80 and RO70 blends on brake specific fuel consumption, brake thermal efficiency, emissions and smoke of the exhaust. The test results of engine operation with various rapeseed oil and jet fuel blends compared with the respective parameters obtained when operating with neat rapeseed oil and those a straight diesel develops at full (100%) engine load and maximum brake torque speed of 2000 rpm. The research results showed that jet fuel added to rapeseed oil allows to decrease the value of kinematic viscosity making such blends suitable for the diesel engines. Using of rapeseed oil and jet fuel blends proved themselves as an effective measure to maintain fuel-efficient performance of a DI diesel engine. The brake specific fuel consumption decreased by about 6.1% (313.4 g/kW·h) and brake thermal efficiency increase by nearly 1.0% (0.296) compared with the respective values a fully (100%) loaded engine fuelled with pure RO at the same test conditions. The maximum NOx emission was up to 13.7% higher, but the CO emissions and smoke opacity of the exhaust 50.0% and 3.4% lower, respectively, for the engine powered with biofuel blend RO70 compared with those values produced by the combustion of neat rapeseed oil at full (100%) engine load and speed of 2000 rpm.

Performance Comparison between Diesel Fuel and Biodiesel Using a Low Cost Single Cylinder Diesel Engine Dynamometer

2014 ◽  
Vol 554 ◽  
pp. 505-509
Author(s):  
Mohd Zaini Jamaludin ◽  
Safaruddin Gazali Herawan ◽  
Mohamed Arifin Yusmady ◽  
Ahmad Fauzi
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Low Cost ◽  
Performance Comparison ◽  
Edible Oil ◽  
Brake Specific Fuel Consumption ◽  
Engine Torque ◽  
Single Cylinder ◽  
Engine Power

Nowadays, biodiesel from non-edible feedstock is gaining more concern than edible oil to substitute diesel fuel. The purpose of this study is to investigate the performance of low cost single cylinder diesel engine fuelled by regular diesel and B5 biodiesel of castor and jatropha. The experiments were conducted to identify the performance of a low cost single cylinder diesel engine dynamometer, in terms of engine torque, engine power, and brake specific fuel consumption. It was found that these biodiesel can be used as the alternative fuel based on the performance of engine dynamometer, where the results show nearly similar with regular diesel.

The Autoignition and Combustion of Coal-Water Slurry Under Simulated Diesel Engine Conditions

1986 ◽  
Vol 108 (4) ◽  
pp. 654-660 ◽  
Author(s):  
D. L. Siebers ◽  
T. M. Dyer
Keyword(s):  
Diesel Engine ◽  
Energy Release Rate ◽  
Energy Release ◽  
Release Rate ◽  
Ignition Delay ◽  
Combustion Characteristics ◽  
Design Parameters ◽  
Coal Slurry ◽  
Water Slurry ◽  
Coal Water Slurry

The combustion characteristics of a coal-water slurry spray were examined under diesel engine conditions. A two-stage combustion process was used to simulate the diesel engine conditions in a constant-volume combustion bomb. The combustion characteristics investigated were ignition delay, ignition site, combustion development, combustion duration, and combustion completeness. The results show that the ignition delay of the coal-water slurry fuel is temperature and pressure dependent. Also, the coal slurry ignition delay is approximately a factor of five longer and the energy release rate is significantly slower in comparison to the ignition delay and energy release rate for conventional No. 2 diesel fuel. The combustion of the slurry spray was incomplete for all test conditions due to the impingement and the adherence of the coal slurry on the wall. This fundamental testing provides insight into engine design parameters which must be considered if coal-water slurry is to be used in practice.

Experimental studies on the combustion characteristics and performance of a naturally aspirated, direct injection engine fuelled with a liquid petroleum gas/diesel blend

2005 ◽  
Vol 219 (2) ◽  
pp. 253-261 ◽  
Author(s):  
Qi Donghui ◽  
Zhou Longbao ◽  
Liu Shenghua
Keyword(s):  
Heat Release ◽  
Fuel Consumption ◽  
Power Output ◽  
Ignition Delay ◽  
Pressure Rise ◽  
Combustion Characteristics ◽  
Cylinder Pressure ◽  
Mixing Ratio ◽  
Peak Rate ◽  
Blend Fuel

This paper studies the combustion characteristics and performances of a LPG/diesel blend-fuel engine; the influences of mixing ratio of LPG in diesel on the ignition timing, in-cylinder pressure, heat-release rate, specific fuel consumption, power output, and exhaust emissions have been identified. The results indicate that the ignition delay of blend fuel was obviously longer than that of diesel and the higher the mixing ratio of LPG in diesel, the longer the ignition delay. When the mixing ratio of LPG in diesel was 10 per cent, the peak in-cylinder gas pressure and the peak rate of pressure rise were slightly higher than those of diesel, and the corresponding crank angles at which the peak values occurred were almost the same as those of diesel. When the mixing ratio was 30 per cent, the peak in-cylinder pressure and the peak rate of pressure rise were lower than those of diesel, and the corresponding crank angles were retarded. With the increasing of mixing ratio of LPG in diesel, the peak rate of heat release increased and the corresponding crank angles were retarded. The equivalent specific fuel consumption of L10 was the same as that of diesel, but that of L30 was slight higher. The power output of the diesel engine was higher than those of L10 and L30 at speed characteristic of full load, especially at high engine speed. With the increasing of mixing ratio, the smoke emissions and NOx emissions were greatly reduced, and CO emissions decreased too, but HC emissions slightly increased.

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