Ingeniería Civil y Mecánica

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Start date: 2020Subject: search.filters.subject.COMBUSTIÓN INTERNA

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    Análisis de parámetros técnicos para mejora de eficiencia en quemadores de tubo radiante de un paso
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2025-02) Nuñez Chadán, Romel Sebastián; Cabrera Anda, Santiago Paúl
    This study explores the variation of technical parameters that enhance the efficiency of a single-pass radiant tube burner. The parameters considered in this analysis include secondary air temperature, gas travel length, and the presence of a static mixer, aiming to evaluate their impact on flame characteristics, energy performance, and temperature distribution. The adopted methodology combines theoretical and experimental analysis, utilizing measurement equipment such as a thermal imaging camera and a gas analyzer. The results indicate that the flame with preheated air at 90 degrees reaches a maximum temperature of 251.7 degrees, while the incorporation of the static mixer allows for a maximum temperature of 233.4 degrees. Reducing the gas travel length to 0.75 meters identifies a stable mid-radiant zone of 0.25 meters, with maximum temperatures ranging from 385 degrees to 465 degrees, achieved at 11 minutes. In terms of thermal efficiency, a useful energy output of 1.36 kW was obtained, with losses of 0.94 kW through flue gases, 0.147 kW through the walls, 0.0368 kW due to unburned solids, and other losses of 0.41 kW. This results in a thermal efficiency of 46.89 percent, compared to the 61.72 percent recorded in previous studies. The reduction in thermal efficiency can be attributed to the combination of the evaluated parameters, suggesting that while flame characteristics improve with air preheating and the metallic insert, the reduced gas travel length increases heat distribution, ultimately limiting overall performance.
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    Análisis de pérdidas energéticas en un motor de combustión interna a gasolina (MECH) de 1600 cm3 en un vehículo de uso particular para determinar su rendimiento térmico
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2020-09) Kevin Alexander, Miranda Pilatuña; Cabrera Anda, Santiago Paúl
    In the present experimental work the Otto cycle performance of a 1600 cubic centimeter internal combustion engine (MECH) of a private vehicle was evaluated by distributing surface temperatures using thermography. The data was used using technological equipment: thermal camera, thermocouple, digital thermometer, anemometer and absolute pressure meter. In addition, the thermograms were obtained to temperatures, velocity, pressure of exhaust gases. The theoretical performance analysis was performed using an indirect method generating a 65 percent. Due to,there were leaks caused by heat transfer (convection in the engine block and oil pan) and heat leaks in exhaust gases (11.72kilowatt) and the cooling system (8,037 kilowatt). Thus, It was determined a performance of 33.15percent. Meanwhile, exergetic analysis the perfomance was 43.25 percent. Consequently, the evaluation of pollutant production shows that it is in the values of carbon monoxide (CO) and hydrocarbons (HC) do not exceed the limits of the NTE INEN 2204: 2017 standard, which details the maximum limits allowed according to the year of the vehicle.