Analysis Of Diesel Engine Research Articles

Pilot scale production of biodiesel from Azolla oil via heterogeneous catalysis and diesel engine analysis: kinetic and techno-economic analysis considerations

ABSTRACT The use of Azolla pinnata oil for the production of biodiesel, coupled with the use of industrial waste dolomite as a catalyst, represents a novel approach with significant potential. This innovative process offers several key advantages, such as utilizing a non-edible feedstock, reducing waste generation, and providing an alternative to fossil fuels. This research aims to investigate the viability of creating biodiesel using Azolla pinnata oil and evaluate its technical and economic appropriateness for large-scale manufacturing. A pilot plant reactor with a 10 L biodiesel capacity carries out the transesterification reaction, using dolomite from industrial waste as a heterogeneous catalyst. The reaction was conducted for 4 h at a temperature of 70°C, and biodiesel yielded approximately 99.14%. Aspen Plus is employed to simulate and design a biodiesel plant, with the reaction kinetics derived from the pilot plant reaction and inputted into Aspen Plus. Plant optimization and economic analysis are performed using the Aspen Economic Analyzer. The biodiesel blends (Azolla 20, Azolla 40, and Azolla 60) were tested in a CI engine and compared with diesel results. Based on the engine test results, the Azolla 20 blend provides less HC (12.9%), CO (13.07%), and smoke (10%) emissions; therefore, it can serve as a better alternative to neat diesel. The primary units of the proposed plant have been designed, and the process’s economic viability was determined. It was discovered that the total capital investment needed is approximately 5.054 million USD, which will be repaid within 1.97 years of operation. This research encompasses pilot plant experiments, process simulation, engine testing, and economic analysis, demonstrating the novelty, technical feasibility, and potential socio-economic impact of this biodiesel production process.

Effect of diethyl-ether on emission and exergy analysis of neem-oil-based biodiesel fuelled diesel engine

This investigation presents the impact of 'diethyl-ether (DEE)' on exergy parameters, and emission concentrations for NEEM45 fuelled small DI diesel engine. Diethyl-ether has been used as an oxygenated improver. DEE is mixed in NEEM45 (neem biodiesel 45% + 55% diesel) in proportions of 5%, 10%, and 15% by vol% basis. The impact of DEE on exergy analysis of diesel engine has been carried out in this investigation. Engine out emissions, namely NOx, CO, HC, and smoke opacity, are measured. Experimental results indicate a significant decline in NOx, CO and improved exergetic efficiency. The exergetic efficiency is increased by 6.8%, which indicates the lower exergy destruction. NOx emission is significantly reduced by 56% as compared to that of NEEM45 without DEE. The experimental results show that exergy parameters and emission characteristics improved with 15% DEE addition.

Experimental analysis of diesel engine with variable flow of acetylene gas in dual fuel mode

The alternative fuel selection in the existing compression ignition engine without major modification is a great challenge. The diesel engines are more compatible because of the wide compression ratio and can operate even at a lean mixture as compared with spark ignition engines. In the present work, the calcium carbide is directly added to the water in the acetylene generator, and the acetylene gas is simultaneously produced and supplied to the engine intake along with the air and diesel injected in a conventional method. The low pressure acetylene gas is used to investigate the performance and emission parameters in the existing engine with some extra accessories and compared with only diesel operation. The peak pressure and heat release rate are higher and show an increasing trend, and the average brake thermal efficiency is 11.74% higher than pure diesel efficiency. In contrast, the emissions such as CO, HC and PM are lowered by 12% and 12.8% and 26.6% at 50% load, respectively.

Effect of Shorea robusta methyl ester biodiesel blends on the exergy and sustainability analysis of diesel engine

ABSTRACT In this experimental investigation, the impact of engine load, compression ratio, and percentage blends of biofuel on exergy, energy, and sustainability parameters for the samples of diesel based (10–40% v/v) biodiesel blends were performed on variable compression ratio engine. The brake thermal efficiency, exergy efficiency, engine sustainability, exergy destruction rate, and other exergy parameters were found to escalate with the escalating engine load, compression ratio, and percentage of Shorea robusta methyl ester biodiesel fuel blends. The exergy and energy efficiency of the engine with diesel fuel were 2.05%, 6.98%, and 10.63%, respectively higher than 10%, 30%, and 40% Shorea robusta methyl ester fuel and 2.23%, 8.67%, and 9.22%, respectively at 50% engine load and 1500 rpm engine speed. The influence of compression ratio, engine load, and fuel blends on the exergetic performance parameters revealed a similar trend with energetic parameters, but the magnitude of exergy parameters was found lower than the energetic parameters. The application of Shorea robusta methyl ester biodiesel blends improved the combustion characteristics with a small drop in energy and exergy performance parameters and sustainability of the engine. The exergy destruction rate and entropy generation rate for shorea robusta methyl ester biodiesel blend were found lower than the conventional fuel. Therefore, the fuel blend have a high potential to be an alternate to the conventional fuel without any design modification of diesel engines.

Effect of fuel injection pressure on the performance and emission analysis of Mahua Methyl ester in a single cylinder diesel engine

Over a decade in the automotive sector, diesel engine analysis has been taken by researchers for the improvement area. Diesel engines were extensively used worldwide than any other category of engines due to its fuel running cost and engine efficiency. The development of diesel engines increased enormously, relative increase was seen towards the weakening of diesel fuel which was its power source. The diesel fuel was exhausting the detrimental emissions. As globally, emission norms of vehicles become very stringent, the researcher has a need to look for the wider alternative. In this paper, a promising alternative of bio seeded Mahua Methyl Ester oil was investigated on the performance and emission analysis in a single-cylinder diesel engine with the influence of varying fuel injection pressure.

Exergy, exergoeconomic and environmental analysis of diesel engine operating with EGR rate

This research presents the effects of exhaust gas recirculation (EGR) and load on a diesel engine. The operational conditions of diesel engine were different loads (5-30 kW) with increment of 5 kW and EGR rate (0-10%) with increment of 2.5%. The engine was supplied with blend of diesel and 7% of biodiesel. The exergetic, exergoeconomic and environmental analysis were investigated in order to evaluate the cost and pollutant emissions of electricity. The results reveal that the load increases the exergetic efficiency, exergy destruction, fuel cost rate and reduces the specific power cost and relative cost difference. In addition, the EGR rate decreases the exergetic efficiency and increases exergy destruction, fuel cost rate, relative cost difference and specific power cost. At low load, the specific total pollution damage is predominant, then the higher EGR rate is desired. At high load, reduction of performance is significant with EGR rate, and total pollution damage loses significance, then the lower EGR rate is desired. Therefore, the maximum load and EGR rate of 2.5% are the best condition under the exergoeconomic and environmental point of view.

Performance and emission analysis of diesel engine with design modifications on piston crown

The present work aims to enhance the performance of the existing diesel engine by modifying the piston design. Swirl piston is used to induce turbulence as an active enhancement technique. The engine is run at 250 bar injection pressure and 17.5 compression ratio by varying the injection timings. A stirrer is introduced at the top of the piston so as to inculcate more turbulence to incoming charge that improves the fuel vaporisation rate. Whirling motion is created in the combustion chamber by rotating the blades on the cavity/bowl of the reciprocating piston head. A simple link mechanism is provided to convert the oscillatory motion of connecting rod into the rotary motion of the vane. The experimental result clears that the brake-specific fuel consumption is reduced by 8.7%, brake thermal efficiency is enhanced by 9.4%, 11.8% of CO emissions are controlled and NO x emissions are controlled by 27% is observed with the modified piston compared to the normal piston at retarded injection timing.

Emission analysis of diesel engine fueled with soybean biodiesel and its water blends

ABSTRACTThe present study is carried out to formulate stable water-in-soybean biodiesel emulsion fuel and investigate its emission characteristics in a single cylinder diesel engine. Four types of emulsion fuels, which consist of a different percentage of water (5%, 10%, 15%, and 20%) in soybean biodiesel, were prepared with suitable surfactant and properties were measured. The physicochemical properties are on par with EN 14214 standards. The experimental result of test fuels indicates that the soybean biodiesel promotes a lower level of hydrocarbon (HC), carbon monoxide (CO) and smoke emissions compared to base diesel except for nitrogen oxide (NOx) emission. Increase in water concentration with soybean biodiesel significantly reduces the NOx emission and smoke opacity. The HC and CO emissions are further reduced with emulsified biodiesel up to 10% water concentration and beyond that limit, marginal increases are recorded. Overall, it is observed that inclusion of water with soybean biodiesel reduces the HC, CO, NOx and smoke emissions when compared to base diesel and soybean biodiesel, and 10% water in soybean biodiesel is an appropriate solution to reduce the overall emissions in the soybean-fuelled diesel engine.

Thermo-economic analysis of diesel engine fueled with blended levels of waste cooking oil biodiesel in diesel fuel

ABSTRACTIn recent years, numerous studies have been carried out on the effect of biodiesel fuels on engine performance and exhaust emissions. But in those studies, no attention has been paid to the thermo-economic analysis of engines while using biodiesel and its blends with diesel fuel. For this aim, various blends of waste cooking oil biodiesel with diesel fuel were tested in a four-cylinder direct-injection diesel engine. The experiments were carried out at a constant engine speed and load and four different biodiesel–diesel blends. The combustion reactions were determined using experimental data and, finally, the thermo-economic analysis was performed for steady-state control volume of the engine by using and solving energy, exergy and economic balances. First law, second law and combustion efficiencies, specific fuel consumption and the rate of exergy destruction were the results of thermodynamic analysis. The economic analysis also leads to some results such as the cost rates of power generation, fuel consumption and losses. The results showed that the best thermodynamic condition of the engine was achieved when using pure diesel. The most economical and costly operating conditions occurred when using 50% and 10% biodiesel–diesel by volume.

Modeling and analysis of diesel engine with addition of hydrogen-hydrogen-oxygen gas

Modeling and analysis of diesel engine with addition of hydrogen-hydrogen-oxygen gas

Energy and Exergy Analysis of Diesel Engine Powered Trigeneration Systems

Abstract This article presents the thermodynamic analysis of diesel engine powered trigeneration system considering the actual engine data of 200 kVA engine systems. Trigeneration systems considered for analysis comprises of a diesel engine integrated with absorption chillers. For better thermodynamic performance of a trigeneration system for cooling applications, absorption chillers integrated with engine systems should accept the heat energy at almost the same temperature at which it is available. With this consideration two trigeneration systems are examined. System one uses low grade heat energy recovered from engine jacket water with single effect chiller and high grade heat energy of exhaust gases in double effect chiller. System two combines recovered energy for use in a single chiller. Analysis of such trigeneration configurations cannot be based on first law analysis alone. This paper through an energy and exergy analysis of a trigeneration system under cooling mode, recommends the use of a trigeneration system with two chillers over a trigeneration system with single chiller. Operating the trigeneration system near the rated capacity of engines improves its energetic as well as exergetic performance. Though the initial cost of a trigeneration system with two chillers is more than the one with single chiller, life cycle costing analysis reveals the former is attractive even on economic basis.

Technological Competitiveness Analysis of Diesel Engine’s Main Applicants by Using Patent Information

Technological Competitiveness Analysis of Diesel Engine’s Main Applicants by Using Patent Information

Thermodynamic analysis of diesel engine with sunflower biofuel

Thermodynamic performance, which is based on the first and second thermodynamic laws, is a significant tool to assess energy systems. In this study, the authors conducted an energy and exergy analysis of a single-cylinder, four-stroke compression ignition engine operated with sunflower methyl ester biofuel at different engine loads (20%, 40%, 60%, 80%, 100%). The energy and exergy efficiencies were subsequently calculated along with the effective work, heat exergy losses and exergy destruction values at ten different engine speeds for five loads. Finally, optimum operating conditions were defined and discussed.

Performance Analysis of Diesel Engine Using Bio Ethanol (Water Hyacinth) by Response Surface Methodology (RSM)

In current years, many researches have been worked to find new sources of alternative fuels. In this situation, the water hyacinth will be a new source for bioethanol. In this study, bioethanol extracted from water hyacinth is blended with diesel (5-BED, 5% bioethanol and 95% diesel v/v) and has been used to experimentally investigate the diesel engine performance and emission. The response surface methodology (RSM) technique with three engine operating variables like (i) Load, (ii) Compression ratio (CR) and (iii) Fuel Injection pressure (FIP) has been implemented to evaluate diesel engine performance using bioethanol diesel blend. The equations were obtained for Brake power (BP), Brake mean effective pressure (BMEP), Brake thermal efficiency (BTHE), and NO emission by using quadratic polynomial

Performance and Analysis of Diesel Engine at Various Injection Timingsunder Various Cooling Rates during Shorter Injection Period

An experimental investigation was carried out to find out the effect of injection timing on performance and emissions of a single cylinder, 4 stroke, and compression ignition engine at various cooling rates. Original injection period of the engine was 240 CA and injection starts at 140 CA BTDC, injection timings were reduced to 220 and 200 CA by delaying the starting of injection at 120 and 100 CA BTDC. Several experimental cycles were conducted at various loads i.e., at 0.5, 1, 1.5, 2, 2.5, 3KW load at cooling rates of 3, 4, 6 lpm of engine water cooling rate. Emissions such as NOx, CO, CO2, UHC and unreacted oxygen was measured by using multi gas exhaust analyzer.

A Comparative Analysis of Different Cycle Diesel Engine Based on Three-Dimensional Simulation

The thermodynamic cycle analysis of diesel engines using the engine cycle simulation programs is feasible. The comparison of dual and LIVC miller cycles engine fueled with ED10 diesel/ethanol blends on temperature and emissions are investigated by simulation. From the comparison, +0.85 EIVC miller cycle is a selection for an optimizing point of miller cycle ratio, i.e, the intake valve timing of the engine is good for NO emission, SOOT emission and the engine power output. The difference of EIVC and LIVC miller cycle was studied. The results show the tendency of performance with EIVC miller cycle is similar to that of LIVC miller cycle. But the peak cylinder combustion temperature of EIVC miller cycle become lower relative to LIVC miller cycle, which lead to slightly lower NO emission and slightly higher SOOT emission for EIVC miller cycle.

Fatigue Analysis of Diesel Engine Connecting Rod Based on Finite Element Method

Connecting rod fatigue in a certain type of diesel engine is analyzed by using finite element analysis method and the FEM software ANSYS. According the actual working conditions, the three-dimensional model with multi-body contact is established to simulate the contact between the connecting rod parts; By using APDL language programming, the work load on the connecting rod, calculated according all the link work loads, is applied to the connecting rod bearing and bushing through the oil film pressure distribution. By finite element method structural strength of the connecting rod was calculated, that can effectively guide the connecting rod design, which has been proved by practice.

97/04040 First and Second Law analysis of diesel engines and gas turbines in combined cycles: a comparative study

97/04040 First and Second Law analysis of diesel engines and gas turbines in combined cycles: a comparative study

Design of a High-Level Diagnostic System

The use of vibration signals produced by the operation of a machine to control its operations and detect developing faults is appealing because of the ruggedness of vibration sensors and their ease of placement. A diagnostic system that employs a few sensors, remotely located from a number of vibration generating mechanisms, to analyze the performance of these mechanisms is termed a “high-level” diagnostic system. The goal of such a diagnostic system is to infer from the remote vibration sensors the characteristics of the internal sources (such as forces and pressures) which could not be easily measured directly. The use of multiple sensors and advanced signal processing methods is necessary for such a system to be viable. A series of studies on vibration excitation, propagation, sensing, and signal processing that demonstrate the basic feasibility of such a diagnostic system are described. The design of a high-level diagnostic system for detecting the combustion and gear mesh excitations in a diesel engine analysis is presented, along with the results of a preliminary application of the system.