Simulation and Experimental Studies on Closed-Cycle Diesel Engines

1999 ◽  
Author(s):  
Yusheng Zhang ◽  
G. T. Reader
Keyword(s):  
Diesel Engines ◽  
Experimental Studies ◽  
Closed Cycle

Characteristics of injection of diesel fuel, rapeseed oil and their mixtures in diesel engines of various types

2021 ◽  
pp. 167-178
Author(s):  
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Rapeseed Oil ◽  
High Speed ◽  
Fuel Injection ◽  
Experimental Studies ◽  
Fuel Injector ◽  
High Speed Diesel ◽  
Engine Type

The necessity of adapting diesel engines to work on vegetable oils is justified. The possibility of using rapeseed oil and its mixtures with petroleum diesel fuel as motor fuels is considered. Experimental studies of fuel injection of small high-speed diesel engine type MD-6 (1 Ch 8,0/7,5)when using diesel oil and rapeseed oil and computational studies of auto-tractor diesel engine type D-245.12 (1 ChN 11/12,5), working on blends of petroleum diesel fuel and rapeseed oil. When switching autotractor diesel engine from diesel fuel to rapeseed oil in the full-fuel mode, the mass cycle fuel supply increased by 12 %, and in the small-size high-speed diesel engine – by about 27 %. From the point of view of the flow of the working process of these diesel engines, changes in other parameters of the fuel injection process are less significant. Keywords diesel engine; petroleum diesel fuel; vegetable oil; rapeseed oil; high pressure fuel pump; fuel injector; sprayer

Investigations on Recycle and Closed-Cycle Diesel Engines : 3rd Report, Performance of Closed-Cycle Diesel Engines

1978 ◽  
Vol 44 (386) ◽  
pp. 3565-3574 ◽  
Author(s):  
Masashi NAGAI ◽  
Tadataka ASADA ◽  
Shinsaku HIRANO ◽  
Masashi YAMAKAWA
Keyword(s):  
Diesel Engines ◽  
Closed Cycle

Experimental studies of closed cycle MHD power generation with FUJI-1 blow-down facility

1993 ◽  
Vol 34 (6) ◽  
pp. 433-446 ◽  
Author(s):  
Nob. Harada ◽  
T. Suekane ◽  
K. Tsunoda ◽  
T. Okamura ◽  
K. Yoshikawa ◽  
...  
Keyword(s):  
Power Generation ◽  
Experimental Studies ◽  
Closed Cycle ◽  
Blow Down

scholarly journals Introduction of the compensatory method of gas sample control in universal systems of ecological diagnostics of diesel engines – microtunnels

2017 ◽  
Keyword(s):  
Flow Rate ◽  
Diesel Engines ◽  
Experimental Studies ◽  
Indirect Measurement ◽  
Differential Method ◽  
Test Method ◽  
Measuring System ◽  
Dilution Factor ◽  
Diagnostic Systems ◽  
Accuracy Of Measurements

Purpose. The development, implementation and confirmation of the practical suitability of the compensatory method for monitoring a gas sample in microtunnels, which is significantly less expensive than the known analogs, in particular the differential method used in the AVL SPC 472 measuring system. Methods. Analysis and synthesis of information on methods for controlling gas samples, regression analysis in the construction of calibration dependences, experimental studies of the method under study, a calculated experiment in evaluating the accuracy of determining the dilution factor of a sample. Results. Measures have been developed to introduce an inexpensive compensatory method for controlling gas samples in universal systems for the ecological diagnosis of diesel engines – microtunnels: the method of calibrating the flowmeters of this method - standard narrowing devices, the method of indirect measurement of the mass flow rate of the sample in a microtunnel, the algorithm for regulating the flow rate of the sampled sample. Conclusions. Theoretically justified, the expediency of using the compensation method of sample control, which is 5 ... 8 times cheaper than the known analogue - the differential method used in the microtunnel AVL SPC 472. It has been experimentally confirmed that, when implementing the compensation test method, inexpensive flow meters - standard tapering devices with a precision class of 1.5 provide the required accuracy of measurements of the dilution factor of exhaust gases by air with an error not exceeding the permissible value of ± 4% and can be used in universal ecological diagnostic systems diesels - microtonules.

Diesel Replacement Model for Dual Diesel-Natural Gas Engines Under Urban Traffic Operation

2008 ◽  
Author(s):  
Fabio A. Bermejo ◽  
Lesme A. Corredor
Keyword(s):  
Natural Gas ◽  
Diesel Engines ◽  
Air Flow ◽  
Combustion Process ◽  
Experimental Studies ◽  
Maximum Load ◽  
Standard Test ◽  
Urban Traffic ◽  
Transient States ◽  
Traffic Conditions

The amount of Diesel (DI) that can be replaced by Natural Gas (NG) in turbocharged Diesel vehicles converted to dual operation and under urban traffic conditions is determined by the rapid changes of engine loads, which also limits the thermodynamic performance of turbochargers. Turbochargers control the air flow that enters to the engine at every single moment of its operation, and therefore supplies the Oxygen (O2) required for burning the fuels involved in the combustion process. This investigation models the energy consumption of a diesel engine operating in dual fuel mode in urban traffic conditions of Barranquilla, Colombia. This model is based on experimental studies of transient states of Turbocharged Diesel Engines and on recent research relating to the conversion of diesel engines to dual mode. Due to the absence of a standard test cycle for the city, this investigation uses a common driving behavior profile registered in 2006 with an urban bus Chevrolet B-70 with a Caterpillar 3126 Engine. It was determined that the greater replacement percentage was about 85% at maximum load and at cruising speeds, due to the air flow supplied by the compressor. The opposite effect was found at transient states; the absence of air is because of the turbocharger performance when the vehicle is leaving the stand-by condition.

scholarly journals Increase of High-Speed Qualities And Economic Efficiency of Use Systems of Ecological Diagnostics Diesel Engines-Microtunnels

2018 ◽  
Keyword(s):  
Particulate Matter ◽  
Economic Efficiency ◽  
Diesel Engines ◽  
High Speed ◽  
Power Plants ◽  
Experimental Studies ◽  
Environmental Testing ◽  
Exhaust Gases ◽  
Particulate Matter Emissions ◽  
Analysis And Synthesis

Purpose. Reducing the duration and cost of procedures for environmental diagnostics of diesel power plants by increasing the speed of measurements of normalizedРM index – average operating emissions of particulate matters with exhaust gases of diesel engines. Methods. Analysis and synthesis of information, mathematical modeling, experimental studies, calculation experiment. Results.In accordance with the requirements of the international standard ISO 8178, a method of accelerated measurement (МАМ) of the PMindex is proposed, which is characterized by the maximum allowable sample filtration rate and the minimum allowable masses of particulate matter in the filters, the use of which can significantly improve the economic efficiency of applying microtunnels: with single- and multi-filter sampling methods - in 3,1 ... 4,1 times and in 5,3 ... 7,1 times, respectively. Conclusions. Compared to the most common methods of control of particulate matter emissions that are realized in mini and microtunnels of Perkins, AVL, Mitsubishicompanies, they are characterized by higher speed and economic efficiency of use - indicators that are of great importance in testing high-power diesel engines –locomotive diesel, ships and others. It is substantiated that the use of МАМ allows to shorten the duration and cost of environmental testing of mainline diesel engines - 2TE116 and shunting - TEM-2 locomotives: certification tests - by 9 ... 28%, which is 0.2 ... 0.7 h and 0, 8 ... 1,5 thousand UAH; research tests - 43 ... 53%, which is 1.7 ... 3.0 h and 4.0 ... 7.5 thousand UAH. With the reduction of the actual emission levels of particulate matter with the exhaust gases of the diesel engine, the efficiency of the use of МАМ increases.

scholarly journals Performance of a diesel engine running on mixed biofuels with the addition of gasoline

2019 ◽  
Vol 140 ◽  
pp. 11004
Author(s):  
Vladimir Markov ◽  
Vyacheslav Kamaltdinov ◽  
Larisa Bykovskaya ◽  
Bowen Sa
Keyword(s):  
Diesel Engine ◽  
Nitrogen Oxides ◽  
Diesel Engines ◽  
Alternative Energy ◽  
Alternative Fuels ◽  
Raw Materials ◽  
Experimental Studies ◽  
Chemical Properties ◽  
Promising Alternative ◽  
Exhaust Gases

The significance of the paper is confirmed by the need to replace petroleum motor fuels with fuels produced from alternative energy sources. Biofuels derived from various vegetable resources are considered as promising alternative fuels for diesel engines. These fuels offer significant advantages with respect to the renewability of their raw materials and good emission performances when burned in ICEs. The main problem of using vegetable oils as biofuels for diesel engines is their high viscosity. This problem can be resolved by using mixed biofuels with the addition of gasoline. The analysis of physico-chemical properties of petroleum diesel fuel (DF) and mixed biofuels containing petroleum DF, rapeseed oil (RO) and AI-80 automotive gasoline was conducted. Experimental studies of the D-245.12S diesel fuelled with these mixed fuels were carried out. The mixed fuels were prepared from 80% DF + 20% RO, from 75% DF + 20% RO + 5% AI-80, and from 70% DF + 20% RO + 10% AI-80. It was shown that the addition of gasoline to mixed biofuels could improve two main toxicity indicators of exhaust gases exhaust gases smoke and emissions of nitrogen oxides. The best emission performance was achieved for the mixture of 70% DF, 20% RO and 10% AI-80. When the diesel engine was switched from the mixture of 80% DF and 20% RO to the mixture of 70% DF, 20% RO and 10% AI-80, the exhaust gases smoke at maximum torque mode decreased from 17.5 to 14.5% on the Hartridge scale, i.e. by 17.1%. The specific emissions of nitrogen oxides decreased from 6.559 to 6.154 g/(kW·h), i.e. by 6.2%.

scholarly journals Increasing Parameters of Diesel Engines by Their Transformation for Methanol Conversion Products

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1710
Author(s):  
Sviatoslav Kryshtopa ◽  
Krzysztof Górski ◽  
Rafał Longwic ◽  
Ruslans Smigins ◽  
Liudmyla Kryshtopa
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Alternative Fuels ◽  
Experimental Studies ◽  
Environmental Parameters ◽  
Methanol Conversion ◽  
Initial Product ◽  
Working Together ◽  
The Cost

The work is aimed at solving the problem of converting existing diesel power drives to gas fuels, which are cheaper and more environmentally friendly alternatives to diesel fuel. Method of energy efficiency increasing of alternative fuels has been improved. Thermochemical essence of energy increasing of source fuel based on the provisions of thermodynamics is considered. Alternative methanol fuel has been chosen as initial product for conversion process and its cost, energy value, and temperature conditions have been taken into account. Calculations showed that the thermal effect from combustion of the converted mixture of CO and H2 exceeds the effect from combustion of the same amount of non-convertible methanol. Fuel energy and engine power were increased due to thermochemical regeneration of exhaust gas heat. An experimental setup was created to study the operation of a converted diesel engine on methanol conversion products. Experimental studies of power, economic, and environmental parameters of converted diesel engine for methanol conversion products were performed. Experimental studies have shown that conversion of diesel engines to work using methanol conversion products is technically reasonable. Fuel consumption reduction was accompanied by environmental performance improvement of the diesel engine working together with a thermochemical methanol conversion reactor. Formation of nitrogen oxides in the exhaust gases decreased in the range of 22–35%, and carbon monoxide occurred in the range of 0–24% according to the crankshaft speed and loading on the engine. Conversion of diesel engines for methanol conversion products is very profitable, because the price of methanol is, on average, 10–20% of the cost of diesel fuel.

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