Ingeniería Mecánica

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    Análisis térmico de un prototipo de cámara de secado estática por convección y radiación de 1000 W para uso semiindustrial
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2021-04) Criollo Camacho, William Rene; Cabrera Anda, Santiago Paúl
    The present research work is focused on the temperature distributions inside the drying chamber with a radiation heat source that in this case four infrared lamps of 250 W each are used. In order to obtain these temperatures, experimental analyses are carried out in the prototype of the chamber and also with a modeling of the dryer simulations were obtained in the software, in a transient state with time intervals of 180, 240 and 688 seconds. The methodology proposed for the study was software simulation, first verifying the modeling of the chamber, then proceeding with the steps for data entry such as: parameters for the type of analysis, type of fluid (air), initial conditions, selection of materials, boundary conditions, amount of heat and radiating surfaces, also through calculations of the parameters of heat transfer inside the chamber by natural convection, forced and radiation, with their combinations reaching 771 W, also obtained the variation of stored energy for the air of 15.65 W. Applying energy balance, the losses by convection to the outside are determined, which reach 25 W. The combined results of the heat transfer methods help to calculate the efficiency of the chamber in vacuum (without load) and considering only the heating of the air inside gives us 6.4 percent. In the experimental and simulated time intervals analyzed, the temperature distributions in the middle and lower part of the chamber reach maximum values of 47 and 58.75 degrees Celsius, respectively.
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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.
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    Diagnóstico térmico del sistema de generación y distribución de vapor en el área de lavandería y esterilización del “Hospital General Provincial Latacunga”
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2017-08) Chango Cañaveral, Álbaro Fernando; Escobar Luna, Luis Eduardo
    The General Provincial Hospital Latacunga is located in the province of Cotopaxi Latacunga canton. For the present work a thermal analysis was carried out in the steam generation and distribution system of the Latacunga Provincial General Hospital. Natural convection heat losses were determined in the 124,890 kW system. The methodology used to obtain experimental data on surface temperature was based on the application of an electronic equipment (infrared thermometer) to determine the system efficiency of 84 percent the consumption of water of 3500 gal / day and fuel averaged 74 gal / day was calculated to determine the efficiency of the heat generator of 79.05%, using the Hospital Design Guide for Latin America and the Institute's regulations Mexican Social Security, which allow determining the consumption of steam needed by a hospital with the number of beds available, which yielded values of 1855 lb / h and 1849 lb / h respectively for a total of 162 beds available, alternatives proposed to reduce the losses of heat in the system of generation and distribution of steam which are: installation of the vapor recovery system flash with which it can recover up to 80 percent of the condensate that is purged to the atmosphere, replacement of damaged steam traps since the proper operation of the traps is fundamental for a good efficiency of the system and saving of fuel, implementation of material insulation in the distribution pipeline with which the uninsulated section of 8.5 meters, distributor - laundry area would decrease heat and temperature losses with 818,145 W and 90,5 degrees celcius respectively.