Ciencias Exactas y Ciencias de la Salud
Permanent URI for this collectionhttps://hdl.handle.net/11285/551014
Pertenecen a esta colección Tesis y Trabajos de grado de los Doctorados correspondientes a las Escuelas de Ingeniería y Ciencias así como a Medicina y Ciencias de la Salud.
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- Integration of experimental data and CFD modeling for the analysis of solar thermal systems applied to solar cooking(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2025-05-28) Sánchez García, Rubén Eduardo; López Salinas, José Luis; emipsanchez; Mancilla Méndez, Yasmany; Aguirre Soto, Héctor Alán; López Guajardo, Enrique Alfonso; Santibañez Aguilar, José Ezequiel; School of Engineering and Sciences; Campus MonterreyThis work presents a comprehensive study integrating experimental validation and numerical modeling of solar energy applications using three complementary approaches. First, the Heliodome solar simulator was evaluated for its ability to replicate real-world irradiance and temperature conditions. The system demonstrated strong agreement with validated datasets such as NSRDB and PVGIS, particularly in the visible spectrum and under varying configurations. It proved effective in simulating irradiance levels from 100 to 4000 W/m² and temperatures from 30 °C to 100 °C, supporting its use in a range of solar energy experiments. Second, a solar thermal cooker using a circular trough collector was designed, optimized, and evaluated both experimentally and through computational simulations. The design achieved an optical efficiency of 72.4%, with temperatures suitable for cooking and water heating, while simplifying construction compared to parabolic alternatives. Lastly, a CFD-based model was developed to simulate the thermal behavior of a hard-boiled egg, treating the egg content as a phase-change material (PCM). The model accurately predicted phase transitions and temperature profiles, showing good agreement with controlled experiments and literature data. Overall, this research demonstrates the effectiveness of combining simulation and experimentation to enhance the design, validation, and optimization of solar energy systems and thermal processes.
- Design and analysis of porous and solar thermofluidic systems: a computational fluid dynamics approach(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2023-06) Castilleja Escobedo, Orlando; López Salinas, José Luis; puemcuervo; Rivera Solorio, Carlos Iván; Gijón Rivera, Miguel Ángel; Mancilla Méndez, Yasmany; Gómez González, Ricardo; School of Engineering and Sciences; Campus MonterreyThe passive and directional displacement of fluids is a highly desired characteristic in microfluidic and energy systems. The available energy that drives the fluids rises from changes in the relative contribution of surface and body forces. In this work, two different thermofluidic processes were analyzed: the directional and selective displacement of a nonaqueous fluid in porous media, and the development of a circular trough solar thermal cooker. First, the displacement of nonaqueous phase in a porous medium was mathematically modeled and experimentally validated. The concept of wettability capacity distribution (WCD) is introduced and applied to bulk porous media to passively influence directional spontaneous imbibition. The performance of the model was verified via experiments varying the interfacial tension, viscosity, permeability, and core materials and sizes. It was found that, while modifying the gravitational-to-capillary forces ratio (Bo>1×10-6) may contribute to asymmetrical oil production in hydromagnesite cores, the presence of a WCD play a major role in achieving this goal. In the second part, a passive circular trough solar thermal cooker was mathematically modeled and experimentally validated. A Monte Carlo-Metropolis algorithm was specified to estimate the optical efficiency of parabolic and circular geometries used to capture solar radiation. From the ray tracing simulations, the optical efficiencies were estimated in the range 72.4 % and 76.5 %, for circular and parabolic surfaces, respectively. The circular geometry was selected for the experimental prototype due to its lower production cost and technical requirements for construction. A computational fluid dynamics model was specified to determine the temperature profile of the cooking circuit. It was determined that the heat transfer fluid in the circuit can reach temperatures of up to 95 °C under ambient conditions (~850 W·m^-2·K^-1) in Monterrey, Mexico.