scholarly journals Operation of marine diesel on biodiesel

2021 ◽  
Vol 27 (1) ◽  
pp. 93-107
Author(s):  
Сергій Вікторович Сагін ◽  
Володимир Васильович Мадей ◽  
Арсеній Сергійович Сагін
Keyword(s):  
Carbon Monoxide ◽  
Diesel Engine ◽  
Nitrogen Oxides ◽  
Fuel Consumption ◽  
Alternative Fuels ◽  
Volume Concentration ◽  
Fuel Mixture ◽  
Biological Origin ◽  
Exhaust Gases ◽  
Marine Diesel

Annotation – The influence of biodiesel fuel on the economic and ecological performance of the marine diesel engine is considered. The reasons limiting use of alternative fuels (including fuels based on biological origin) on vessels are indicated. The results are performed on a specialized vessel with a deadweight of 10,820 tons, which carried out short-term (within 4 ... 6 days) transitions between ports, were it was possible to replenish alternative fuel stocks. Studies performed on 5DC-17A Tier II Daihatsu Diesel marine diesels in the range of their operational loads 55 ... 85 %, from a fuel mixture consisting of 80 ... 95% of DMB diesel fuel and 5 ... 20% of B99.9 FAME biofuel, next conclusion have been done: in all range of loads and for all content of biofuels in the fuel mixture there is an increase in the specific efficient fuel consumption; on the operating modes in range 55 ... 65% of nominal loading and 5 ... 10 % of the maintenance of biofuel in mix this increase makes 1.92 ... 2.96 %, on the modes 75 ... 85 % of loading and at use mixtures with a content of 15 ... 20 % biofuels increase in fuel consumption reaches 4.04 ... 6.67 %; most of all, the efficiency of the diesel engine detected during its operation at loads of 55 ... 65 % and 15 ... 20 % of the biofuel content in the mixture, in this conditions, the increase in specific fuel efficiency reaches 7.39 ... 8.17 %; during the operation of the diesel engine in the load range of 55 ... 85 %, the emission of nitrogen oxides is observed, with best efficacies (up to 23.8 ... 24.3 %) corresponding to 10 ... 15 % of the biofuel content in mixtures; with an increase in the content of biofuels in the mixture up to 20 % reduction in emissions of nitrogen oxides is in the range of 10.1 ... 15.2 %; the use of biofuels helps to reduce the volume concentration of carbon monoxide in the exhaust gases; the greatest efficiency is corresponding at load 75 ... 85 % and use of the fuel mix containing 20 % of biofuel, under such conditions decrease in concentration of carbon monoxide reaches 25.4%; which further enhances the energy efficiency of ships. The optimal composition of the fuel mixture containing biofuel has been proposed, taking into account its environmental (before the emission of nitrogen oxides and the volume concentration of carbon monoxide in the exhaust gases), as well as economic performance of marine diesel.

scholarly journals Investigation of the working process of a diesel engine when operating on anhydrous fuel, coarse and micro-heterogeneous water-fuel emulsion

2020 ◽  
pp. 109-113
Author(s):  
С.П. Андрющенко ◽  
С.В. Титов ◽  
Г.С. Юр
Keyword(s):  
Diesel Engine ◽  
Nitrogen Oxides ◽  
Fuel Consumption ◽  
Experimental Studies ◽  
Working Process ◽  
Exhaust Gases ◽  
Marine Propulsion ◽  
Marine Diesel ◽  
Reduce Emissions ◽  
Cycle Temperature

Оксиды азота являются наиболее опасными химическими соединениями, находящимися в составе отработавших газов судовых дизелей. Уменьшение содержания оксидов азота является весьма сложной задачей, так как это связано с ограничениями максимальной температуры цикла, термического КПД и, следовательно, с ограничениями по топливной экономичности. Одним из эффективных способов уменьшения концентрации оксидов азота является применение водотопливных эмульсий. Недостатком применения эмульсии является увеличение удельного расхода топлива. Целью работы является исследование возможности одновременного снижения уровня вредных выбросов и расхода топлива при работе дизеля на ВТЭ. В статье приведены описание экспериментальной установки и результаты экспериментальных исследований дизеля Ч10,5/12 на безводном топливе, грубой и микрогетерогенной водотопливных эмульсий с содержанием воды 15% при работе по винтовой характеристике. С использование полученных в ходе испытаний дизеля индикаторных диаграмм выполнен сравнительный анализ рабочего процесса на различных топливах. Полученные результаты выполненных исследований подтвердили эффективность использования микрогетерогенной эмульсии, в сравнении с грубой эмульсией для снижения выбросов оксидов азота с отработавшими газами в судовых дизельных энергетических установках и уменьшения удельного расхода топлива. Nitrogen oxides are the most dangerous chemical compounds which come out with the exhaust gases of marine diesel engines. Reducing nitrogen oxides is challenging due to limitations on maximum cycle temperature, thermal efficiency, and hence fuel economy limitations. One of the effective ways to reduce the concentration of nitrogen oxides is the use of water-fuel emulsions. The disadvantage of using an emulsion is the significant fuel consumption increase. This article describes the experimental setup and the results of experimental studies of a Ч10.5/12 diesel engine on anhydrous fuel, coarse and micro-heterogeneous water-fuel emulsions with a water content of 15% when operating in service. Performance diagrams obtained during the diesel engine tests let the authors get a comparative analysis of the working process using various fuels. The results confirmed the effectiveness of using a micro-heterogeneous emulsion, in comparison with a coarse emulsion, to reduce emissions of nitrogen oxides with exhaust gases in marine propulsion systems and to reduce fuel consumption.

OPTIMIZATION OF GAS-DIESEL ENGINE REGULATION AS A METHOD OF IMPROVING ITS ECOLOGICAL CHARACTERISTICS

2021 ◽  
pp. 28-32
Author(s):  
VALERIY L. CHUMAKOV ◽  
Keyword(s):  
Carbon Monoxide ◽  
Diesel Engine ◽  
Nitrogen Oxides ◽  
Diesel Fuel ◽  
Hydrocarbon Fuel ◽  
Load Range ◽  
Engine Operation ◽  
Exhaust Gases ◽  
Wide Range ◽  
Diesel Cycle

The paper shows some ways to improve the environmental characteristics of a diesel engine using gaseous hydrocarbon fuel and operating the engine in a gas-diesel cycle mode. Some possibilities to reduce toxic components of exhaust gases in a gas-diesel engine operating on liquefi ed propane-butane mixtures have been studied. Experiments carried out in a wide range of load from 10 to 100% and speed from 1400 to 2000 rpm showed that the gas-diesel engine provides a suffi ciently high level of diesel fuel replacement with gas hydrocarbon fuel. The authors indicate some eff ective ways to reduce the toxicity of exhaust gases. The engine power should be adjusted by the simultaneous supply of fuel, gas and throttling the air charge in the intake manifold. This method enriches the fi rst combusting portions to reduce nitrogen oxides and maintains the depletion of the main charge within the fl ammability limits of the gas-air charge to reduce carbon monoxide and hydrocarbons. The authors found that when the engine operates in a gas-diesel cycle mode, the power change provides a decrease in nitrogen oxide emissions of gas-diesel fuel only due to gas supply in almost the entire load range as compared to the pure diesel. At high loads (more than 80%) stable engine operation is ensured up to 90% of diesel fuel replaced by gas. Even at 10% of diesel fuel used the concentration of nitrogen oxides decreases by at least 15…20% as compared with a diesel engine in the entire load range. However, there is an increased emission of hydrocarbons and carbon monoxide in the exhaust gases. Further experimental studies have shown that optimization of the gas diesel regulation can reduce the mass emission of nitrogen oxides contained in exhaust gases in 2…3 times and greatly reduce the emission of incomplete combustion products – carbon monoxide and hydrocarbons.

scholarly journals Analysis of influence of using catalyst and polar additives on engine performance and exhaust emission

2019 ◽  
Vol 177 (2) ◽  
pp. 3-6
Author(s):  
Marcin TKACZYK ◽  
Maria SKRĘTOWICZ ◽  
Konrad KRAKOWIAN
Keyword(s):  
Carbon Monoxide ◽  
Diesel Engine ◽  
Nitrogen Oxides ◽  
Fuel Consumption ◽  
Engine Performance ◽  
Lubricating Oil ◽  
Exhaust Emission ◽  
Performance And Emission ◽  
Positive Effect ◽  
Catalytic Additive

In the paper researches of influence of using catalyst and polar additives on engine performance and emission of exhaust were carried out. The tests were made on diesel engine DuraTorq-TDDi/TDCi 16v with a capacity of 1998cm3 produced by Ford company. Two additives were investigated: FMAX – catalytic additive to fuel and HDOS – polar additive to lubricating oil in different proportions. The results indicated that using tested additives has a positive effect on exhaust composition (lower concentrations of nitrogen oxides, soot and carbon monoxide) and also decreased fuel consumption.

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 Marine Diesel Engine Exhaust Emissions Measured in Ship’s Dynamic Operating Conditions

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6589
Author(s):  
Artur Bogdanowicz ◽  
Tomasz Kniaziewicz
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Systems Engineering ◽  
Operating Conditions ◽  
Marine Diesel Engine ◽  
Engine Exhaust ◽  
Exhaust Gases ◽  
Marine Diesel ◽  
Recorded Data ◽  
Dynamic States

The paper presents the results of research on measuring the emissions from marine diesel engines in dynamic states. The problem is as follows: How to measure emissions of the composition of exhaust gases on board a ship, without direct measurement of fuel consumption and an air flow to marine diesel engine, during maneuvering the ship in the port area. The authors proposed a measurement methodology using an exhaust gas analyzer with simultaneous recording of the load indicator, engine speed, inclinometer, and Global Positioning System (GPS) data. Fuel consumption was calculated based on mean indicated pressure (MIP) tests. Recorded data were processed in the LabView systems engineering software. A simple neural network algorithm was used to model the concentrations of ingredients contained in engine exhaust gases during dynamic states. Using the recorded data, it is possible to calculate the emissions of the composition of exhaust gases from the marine diesel engine and calculate the route emissions of the tested vessel.

STUDI PENENTUAN KOMPOSISI OPTIMUM CAMPURAN BAHAN BAKAR BIODIESEL–PETRODIESEL

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Soni S. Wirawan dkk
Keyword(s):  
Carbon Monoxide ◽  
Particulate Matter ◽  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Cetane Number ◽  
Price Policy ◽  
Oxides Of Nitrogen ◽  
Fuel Price ◽  
Biodiesel Blend

Biodiesel is a viable substitute for petroleum-based diesel fuel. Its advantages are improved lubricity, higher cetane number and cleaner emission. Biodiesel and its blends with petroleum-based diesel fuel can be used in diesel engines without any signifi cant modifi cations to the engines. Data from the numerous research reports and test programs showed that as the percent of biodiesel in blends increases, emission of hydrocarbons (HC), carbon monoxide (CO), and particulate matter (PM) all decrease, but the amount of oxides of nitrogen (NOx) and fuel consumption is tend to increase. The most signifi cant hurdle for broader commercialization of biodiesel is its cost. In current fuel price policy in Indonesia (especially fuel for transportation), the higher percent of biodiesel in blend will increase the price of blends fuel. The objective of this study is to assess the optimum blends of biodiesel with petroleum-based diesel fuel from the technically and economically consideration. The study result recommends that 20% biodiesel blend with 80% petroleum-based diesel fuel (B20) is the optimum blend for unmodifi ed diesel engine uses.Keywords: biodiesel, emission, optimum, blend

Main engine of transport ship inlet air cooling by ejector chiller

2020 ◽  
Vol 5 (3) ◽  
pp. 33-48
Author(s):  
Roman M. Radchenko1 ◽  
◽  
Dariusz Mikielewicz2 ◽  
Mykola I. Radchenko1 ◽  
Victoria S. Kornienko1 ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Air Temperature ◽  
Temperature Drop ◽  
Climatic Conditions ◽  
Air Cooling ◽  
Slow Speed ◽  
Exhaust Gases ◽  
Transport Ship ◽  
Main Engine

The efficiency of cooling the air at the inlet of marine slow speed diesel engine turbocharger by ejector chiller utilizing the heat of exhaust gases and scavenge air were analyzed. The values of air temperature drop at the inlet of engine turbocharger and corresponding decrease in fuel consumption of the engine at varying climatic conditions on the route line Odesa-Yokogama- Odesa were evaluated.

scholarly journals The influence of fuel injection pump malfunctions of a marine 4-stroke Diesel engine on composition of exhaust gases

2016 ◽  
Vol 167 (4) ◽  
pp. 53-57
Author(s):  
Joanna LEWIŃSKA
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermodynamic Parameters ◽  
Laboratory Study ◽  
Fuel Injection ◽  
Marine Diesel Engine ◽  
Fuel Pump ◽  
Engine Cylinder ◽  
Marine Diesel ◽  
Fuel Leakage

The article presents results of a laboratory study on exhaust gas emission level from a marine diesel engine. The object of the laboratory study was a four-stroke marine diesel engine type Al 25/30 Sulzer, operated at a constant speed. The examination on the engine was carried out according to regulations of the Annex VI to MARPOL 73/78 Convention. The laboratory study consisted of 3 observations: the engine assumed to be operating without malfunctions, delay of the fuel injection by 5° of crankshaft angle in the second engine cylinder, and the leakage of the fuel pump on the second engine cylinder. Additionally, parameters of fuel consumption and thermodynamic parameters of the marine engine were measured during the research. Simulated malfunctions caused changes in total weighed NOx, CO, and CO2 emissions for all considered engine loads. All simulated malfunctions caused a small change in measured thermodynamic parameters of the engine. The engine operation with the delayed fuel injection and the fuel leakage in the fuel pump in one cylinder caused a decrease of NOx and CO emission level. Fuel leakage in the fuel pump causes the CO2 emission to decrease only at low engine load. Calculations of the weighed specific fuel consumption present a 1-2% change in the engine efficiency.

scholarly journals Ensuring Requirements for Emissions of Harmful Substances of Diesel Engines

2020 ◽  
Vol 19 (4) ◽  
pp. 305-310
Author(s):  
G. M. Kuharonak ◽  
D. V. Kapskiy ◽  
V. I. Berezun
Keyword(s):  
Diesel Engine ◽  
Nitrogen Oxides ◽  
Fuel Consumption ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Average Temperature ◽  
Dispersed Particles ◽  
Harmful Substances ◽  
Gas Recirculation ◽  
Emissions Of Harmful Substances

The purpose of this work is to consider the requirements for emissions of harmful substances of diesel engines by selecting design and adjustment parameters that determine the organization of the workflow, and the exhaust gas cleaning system, taking into account the reduction of fuel consumption. Design elements and geometric characteristics of structures for a turbocharged diesel engine of Д-245 series produced by JSC HMC Minsk Motor Plant (4ЧН11/12.5) with a capacity of 90 kW equipped with an electronically controlled battery fuel injection have been developed: exhaust gas recirculation along the high pressure circuit, shape and dimensions of the combustion chamber, the number and angular arrangement of the nozzle openings in a nozzle atomizer, and inlet channels of the cylinder head. Methods for organizing a workflow are proposed that take into account the shape of the indicator diagrams and affect the emissions of nitrogen oxides and dispersed particles differently. Their implementation allows us to determine the boundary ranges of changes in the control parameters of the fuel supply and exhaust gas recirculation systems when determining the area of minimizing the specific effective fuel consumption and the range of studies for the environmental performance of a diesel engine. The paper presents results of the study on the ways to meet  the requirements for emissions of harmful substances, obtained by considering options for the organization of working processes, taking into account the reduction in specific effective fuel consumption, changes in the average temperature of the exhaust gases and diesel equipment. To evaluate these methods, the following indicators have been identified: changes in specific fuel consumption and average temperature of the toxicity cycle relative to the base cycle, the necessary degree of conversion of the purification system for dispersed particles and NOx. Recommendations are given on choosing a diesel engine to meet Stage 4 emission standards for nitrogen oxides and dispersed particles.

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