Characterization of Emissions in Low Displacement Diesel Engines Using Biodiesel and Energy Recovery System

Orozco, Wilman; Acuña, Norberto; Forero, Jorge Duarte

doi:10.15866/ireme.v13i7.17389

Cited by 10 publications

(8 citation statements)

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“…To determine the deflection of the journal in the horizontal and vertical direction, the angles φ x and φ y are used. The relationship between the deflection angles φ x , φ y and the misalignment angle (ψ) is shown in Equations ( 8) and (9).…”

Section: Lubrication Film Thicknessmentioning

confidence: 99%

“…Bearings typically experience misalignment, causing uneven wear processes and catastrophic failures. In the particular case of motor bearings, they are susceptible to misalignment, which induces a reduction in performance and component life [8,9]. Additionally, misalignment causes a reduction in the lubrication film, resulting in an increase in eccentricity.…”

Section: Introductionmentioning

confidence: 99%

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A Numerical Model for the Analysis of the Bearings of a Diesel Engine Subjected to Conditions of Wear and Misalignment

2021

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In the present work, a numerical model is developed to investigate the influence of wear and misalignment on the bearings of a stationary diesel engine. The model implemented considers the effects of surface wear on the bearing, cavitation effects, and surface roughness. For the numerical analysis, changes in the surface roughness of , , and are defined, and changes in the bearing load of 50%, 75%, and 100%. The results demonstrated that increasing the surface roughness intensifies the bearing wear, which represents 18% and 140% of the bearing clearance for the roughness of and , respectively. Additionally, the surface roughness causes a considerable increase in the bearing wear rate. The results described a maximum wear rate of . In general, increasing the bearing load by 25% doubles the hydrodynamic pressure conditions increases friction force by 33%, and reduces lubrication film thickness by 12%. The analysis of the angle of deflection, and , shows that the moment and the degree of misalignment tend to increase significantly with the increase in the magnitude of the angle . Negative angles of deflection, , produce a greater increase in the degree of misalignment and the moment. This implies a greater chance of contact with the bearing surface. In conclusion, the proposed methodology serves as a reliable tool to simultaneously evaluate key parameters on the tribological behavior of bearings that further extend their endurance and minimize wear damage.

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Section: Lubrication Film Thicknessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Numerical Model for the Analysis of the Bearings of a Diesel Engine Subjected to Conditions of Wear and Misalignment

2021

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“…The latter represents a complex problem since ICEs play a central role in different sectors such as transportation, agriculture, power generation, and industry, thus setting intensified pressure on pollution deceleration [4][5][6]. Governmental and international organizations have made a tremendous effort to potentialize global energy transition to renewables while simultaneously setting restrictions in various sectors to mitigate the rate of greenhouse emissions [7,8].…”

Section: Introductionmentioning

confidence: 99%

Combustion and Performance Evaluation of a Spark Ignition Engine Operating with Acetone–Butanol–Ethanol and Hydroxy

et al. 2021

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Alternative fuels for internal combustion engines (ICE) emerge as a promising solution for a more sustainable operation. This work assesses combustion and performance of the dual-fuel operation in the spark ignition (SI) engine that simultaneously integrates acetone–butanol–ethanol (ABE) and hydroxy (HHO) doping. The study evaluates four fuel blends that combine ABE 5, ABE 10, and an HHO volumetric flow rate of 0.4 LPM. The standalone gasoline operation served as the baseline for comparison. We constructed an experimental test bench to assess operation conditions, fuel mode, and emissions characteristics of a 3.5 kW-YAMAHA engine coupled to an alkaline electrolyzer. The study proposes thermodynamic and combustion models to evaluate the performance of the dual-fuel operation based on in-cylinder pressure, heat release rate, combustion temperature, fuel properties, energy distribution, and emissions levels. Results indicate that ABE in the fuel blends reduces in-cylinder pressure by 10–15% compared to the baseline fuel. In contrast, HHO boosted in-cylinder pressure up to 20%. The heat release rate and combustion temperature follow the same trend, corroborating that oxygen enrichment enhances gasoline combustion. The standalone ABE operation raises fuel consumption by around 10–25 g∙kWh−1 compared to gasoline depending on the load, whereas HHO decreases fuel consumption by around 25%. The dual-fuel operation shows potential for mitigating CO, HC, and smoke emissions, although NOx emissions increased. The implementation of dual-fuel operation in SI engines represents a valuable tool for controlling emissions and reducing fuel consumption while maintaining combustion performance and thermal efficiency.

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“…The reduction of fossil fuel reserves, global warming, and environmental pollution have increased interest in developing and implementing more efficient technologies to reduce fuel consumption and polluting emissions. In particular, in internal combustion engines (ICE), only a third of the fuel's energy is transformed into useful work, while the rest is lost through cooling systems, lubrication, and exhaust gases [1][2][3]. To reduce these losses and reduce fuel consumption, different energy conversion systems have been considered, including turbomachines [4], thermodynamic cycles [5], and thermoelectric generators (TEG) [6].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation to evaluate the influence of geometric parameters on the physical behavior of heat exchangers

Suárez

Abril

2021

J. Phys.: Conf. Ser.

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In the present investigation, a methodology was developed by means of numerical simulation for the evaluation of the influence of the geometric parameters of the heat exchangers used in thermoelectric generation devices. The validation of the proposed methodology was carried out through experimental tests on a diesel engine test bench under four load conditions (2 Nm, 4 Nm, 6 Nm, and 8 Nm) and a constant speed of 3600 rpm. The results obtained show that the methodology proposed by means of the numerical simulation presents a high concordance with the behavior described experimentally. The deviation between the simulation predictions and the experimental results was less than 4%. Additionally, it was evidenced that the change in the geometry of the heat exchanger has a considerable impact on the parameters of heat flow and surface temperature. It was shown that a 50% reduction in fin distance causes an increase of 2% and 2.4% in the previous parameters. Through geometric modifications, the electrical power generated increased by 7.9%. In general, the methodology developed through numerical simulation allows the analysis of the physical, thermal, and hydraulic phenomena present in heat exchangers focused on use in thermoelectric devices.

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Characterization of Emissions in Low Displacement Diesel Engines Using Biodiesel and Energy Recovery System

Cited by 10 publications

References 0 publications

A Numerical Model for the Analysis of the Bearings of a Diesel Engine Subjected to Conditions of Wear and Misalignment

A Numerical Model for the Analysis of the Bearings of a Diesel Engine Subjected to Conditions of Wear and Misalignment

Combustion and Performance Evaluation of a Spark Ignition Engine Operating with Acetone–Butanol–Ethanol and Hydroxy

Numerical simulation to evaluate the influence of geometric parameters on the physical behavior of heat exchangers

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