Conference Agenda

Abstract: This paper investigates how the influence of modifying the chord length of NACA 0018 profile blades affects the energy conversion efficiency of a vertical-axis Darrieus wind turbine (VAWT) under the low wind speed conditions recorded in Lurin in 2024. Using 2D-CFD simulations, with a k- epsilon turbulence model, with a constant tip speed ratio (TSR) of 1 and average wind speeds of 2.78 m/s, the chord length was increased from 0.20 m to 0.22 m. This adjustment led to an improvement in torque from 0.267655 N m to 0.314690 N m, which led to an increase in power coefficient (Cp) from 0.24 to 0.29, representing an increase of 17.57%. Furthermore, the results showed that although increasing the chord length improves efficiency, the increase in Cp is moderated by continuing with longer lengths. For example, at a length of 0.24 m, Cp increased to 0.36, but when moving from 0.24 m to 0.26 m, the increase was only 7.03%, reaching a maximum Cp value of 0.38. This behavior suggests a saturation point in the efficiency improvement due to the additional aerodynamic drag generated by longer blades. The results support previous studies, such as that of Pramono et al. [1], who showed that increasing the chord length of the NACA 4415 airfoil improves Cp by 15.68% at low TSRs. Therefore, this study highlights the importance of chord length in the optimization of vertical axis wind turbines under low wind speed conditions to improve the efficiency of small-scale turbines in areas with limited wind resources.

Abstract – This study presents the design and analysis of a rear spoiler for low-end sedans, specifically for the Volkswagen Vento model, aimed at reducing the aerodynamic drag coefficient (Cx) and fuel consumption. The design was based on the NACA 2412 airfoil profile, optimizing its shape and angle to achieve a more uniform airflow and reduce aerodynamic resistance. Simulations were performed using Computational Fluid Dynamics (CFD) tools in ANSYS and SolidWorks, yielding significant results at an average speed of 65 km/h, in compliance with traffic regulations in Peru. Results show that the aerodynamic drag coefficient (Cx) decreased from 0.40 to 0.36, representing a 10% improvement. This reduction allowed the vehicle’s required power to drop from 2953.325 W to 2657.992 W, translating into less engine effort and, consequently, a 10% fuel saving. Average fuel consumption decreased from 0.80545 kg/100 km to 0.72497 kg/100 km, validating the design's efficiency in both simulations and field tests.
Keywords: Aerodynamics, spoiler, drag coefficient, low-end sedan, CFD simulations, fuel consumption.

This study compares the carbon footprint and lifetime cost of an electric vehicle (EV) and an internal combustion vehicle (ICV) in Peru, considering their full life cycle. Two JAC models were analyzed, integrating the manufacturer’s technical specifications and applying mathematical models to quantify emissions at each stage: production, manufacturing, operation, and dismantling. The results indicate that the ICV emits 217.1 g CO₂ eq/km, while the EV emits 114.25 g CO₂ eq/km, increasing to 134.53 g CO₂ eq/km if the battery is replaced at 150,000 km. In terms of costs, the EV is initially more economical (119,511.61 vs. 131,014.98 soles), but with battery replacement, it surpasses the ICV (145,878.61 soles). These findings highlight that while EVs reduce emissions, their economic viability depends on battery replacement.

Air conditioning has been one of the inventions of mankind that seeks the comfort of the individual. This research aimed to determine the thermal load and design an air conditioning system in the auditorium of the Professional School of Electrical Mechanical Engineering, taking into account that the thermal load means a set of parameters that involve the quality of heat that must be subtracted from the place in order to cool the environment or in any case maintain the desired temperature, cooling is a set of processes by which heat is subtracted and it is possible to maintain a lower temperature to the surrounding environment. The methodology used involves a study of action to the extent that focused on the solution to the problem of incorporating air conditioning to the auditorium environment of the Professional School, this design is known as a proposal for improvement where the solution is not executed, but is proposed. The sample is understood as the environment, in this case the environment of the Auditorium of the new pavilion of the mentioned Professional School. The research will focus on determining the thermal load and designing an air conditioning system for the auditorium of the Professional School as a solution to the comfort of students and teachers who use the auditorium. Solid documentation was obtained about the conductivity and thermal load as the pressurization of the air conditioning. It is recommended to implement the air conditioning system through a project based on this study.

Abstract: The study analyzes the fatigue strength of Hardtail MTB bicycle frames using simulations with ANSYS Mechanical,comparing materials such as steel, aluminum and carbon fiber.Numerical results indicate that Von Mises stresses in the structure reach a maximum of 6.5959 × 10⁹ Pa in critical areas, such as the connection to the rear wheel, suggesting that these areas may need reinforcement due to high loading. As for the deflections, the maximum observed was 0.079544 m in the rudder area, and 0.010866 m in the pedal area, indicating adequate stiffness in most of the structure, but with points requiring improvement. The safety factor analysis shows that, in general, the structure has a factor between 5 and 15, which is adequate, although in certain joints, such as in the pedal area, the factor drops to a minimum of 0.15966, which can be critical under extreme loads. In addition,stresses under compressive and vertical loads also reveal areas of high stress, with values of 8.26 × 10⁹ Pa in compression, indicating that the joints should be strengthened and the frame geometry improved. Finally, it is recommended to consider materials such as high-strength steel alloys or chrome- molybdenum, and to optimize frame geometry to increase durability and safety under demanding conditions Key words: Frame, steel, simulation, ANSYS, factor of safety.

The design and structural analysis of hydraulic presses is a critical aspect in the metalworking industry due to their essential role in the processes. However, the technical literature shows a significant gap in the integration of analytical methodologies and computational tools, which hinders the comprehensive evaluation of structural designs. Most of the existing studies focus exclusively on one of these approaches, either traditional analytical methods or advanced computational simulations, neglecting the advantages that a combined and systematic methodology could offer. This descriptive research addresses this methodological gap by proposing an innovative approach for the structural design of hydraulic presses, integrating analytical calculations and advanced simulations. Classical analytical methods such as the Cross method and stress-strain equations were first used and then validated by computational simulations in Autodesk Inventor, ANSYS and Ftool, which allowed modeling, simulating and analyzing the structural configuration of the press. This integrated approach allowed the identification of critical stress zones, improving stress distribution and maintaining structural safety standards. The results show that the proposed design achieves a maximum deflection of 1.2 mm and equivalent stresses of 117 MPa under a nominal load of 981,000 N, complying with the limits established for ASTM A36 steel. In addition, the weight of the press is reduced without compromising stiffness, which represents an improvement in terms of efficiency and cost.