Ciencias Exactas y Ciencias de la Salud
Permanent URI for this collectionhttps://hdl.handle.net/11285/551039
Pertenecen a esta colección Tesis y Trabajos de grado de las Maestrías correspondientes a las Escuelas de Ingeniería y Ciencias así como a Medicina y Ciencias de la Salud.
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- Design and evaluation of heat exchangers for cooling thermoelectricdevices using additive manufacturing(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2024-12-11) Gonzáles Garibay, Ángel Bernardo; Rodríguez González, Ciro Ángel; emipsanchez; Cedeño Viveros, Luis Daniel; School of Engineering and Sciences; Campus Monterrey; Martínez López José IsraelThermoelectric modules is a relatively new technology for air conditioning systems en abled by solid state semiconductor base, with major challenges in implementation such as efficiency and high implementation costs. This thesis focuses on the design and manufactureof heat exchangers (HXs)generated using additive manufacturing (AM) that take advantage of the use of free form geometries impossible to manufacture using conventional technologies. Specifically, tryply periodic minimal surface (TPMS) based structures, were tested. For the assessment, diverse gyroid designs with stretched axes were compared against a standard (not stretched) design and a traditional extruded flat fins heat exchanger. Computational fluid dy namics (CFD) simulations and experimental testing were conducted using a custom designed wind tunnel to characterize the temperature drop for these designs. Experimental data suggest that the charactersic high surface area-to-volume ratio of standard gyroids provides a limited performance compared to the stretched configuration. A stretched 4-row gyroid demonstrated the best temperature gradient of 9.21◦C, while the regular gyroid and the stretched 1-row gyroid performed the worst, with gradients of 6.44◦C and 6.05◦C, respectively. However, the convective heat transfer coefficient for the stretched 4-row gyroid was 188.41 W/m2 · K, lower than that of the extruded flat fins design, which was 197.18 W/m2 · K. This indicates that, although the stretched 4-row gyroid design exhibited the most efficient heat absorption, resulting in a significant improvement in the thermoelectric assembly’s efficiency, it still has room for optimization to enhance its convective efficiency. Such improvements could fur ther boost the overall performance of thermoelectric modules. This underscores the potential of optimized complex geometries to significantly enhance both the thermal and overall effi ciency of thermoelectric systems and opens the possibilities to see additive manufactured heat exchangers as feasible for enhancing thermoelectric modules for air conditioning systems.
- Environmental impact of conventional manufacturing and additive manufacturing in lifecycle of turbine blade(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2018-05-16) Torres Carrillo, Sharon Andrea; Rodríguez González, Ciro Ángel; Siller Carrillo, Héctor Rafael; Vila Pastor, Carlos; Vega, YadiraThe exponential growth of additive manufacturing technologies is not only improving production processes to achieve functional requirements for products, but it could also help to minimize environmental impacts. In order to align a green product lifecycle management vision, companies need to implement emerging technologies and define a set of metrics that measure the benefits of the change. Each product requires a particular and optimized manufacturing process plan, and each production phase must achieve a significant reduction of critical metrics for the whole Life Cycle Assessment (LCA). This study provides a comprehensive and comparative LCA of two manufacturing process plans for the case study of an aircraft engine turbine blade. The first process consists of a combination of Investment Casting and Precision Machining and the second consists in the replacement of Investment casting by Selective Laser Melting as an emergent process for near net shape fabrication. The collected data for the comparison includes Global Warming Potential (GWP), Acidification Potential (AP), Ozone layer Depletion Potential (ODP), Human Toxicity Potential (HTP), Ecotoxicity and Abiotic Depletion Potential (ADP).
- Road load data acquisition system with SAE-J1939 communications network: integration and laboratory test(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2018-05-14) Orellana Cruz, Oscar; Rodríguez González, Ciro Ángel; Siller Carrillo, Héctor Rafael; Martínez Romero, Oscar; Guedea Elizalde, FedericoThis thesis discloses the results of a reliability analysis (R&R Study) through comparative method to validate a data acquisition (DAQ) system developed and built as a prototype. The laboratory conditions were established in order to test and validate the prototype when it acquires signals from accelerometers and strain gages as well as parameters taken from the electronic control unit (ECU), in this case a truck. The prototype equipment is composed of 9030 Compact RIO system with NI 9862 module for Controller Area Network (CAN) SAE J1939 and NI 9206 for analog inputs. 800 Hz sampling rate is programmed with LabVIEW code to acquire, store and analyze information. For the truck parameters, the code developed by Armando Ramírez in his research [6] was replicated and integrated into the code developed for the acquisition of signals with a user-friendly and versatile interface. The parameters are accelerator pedal position, engine speed, engine coolant temperature and wheel-based vehicle speed, with these parameters is possible to analyze the driving mode during the road tests. Instrumentation for acceleration was developed on a shaker to acquire the data, the frequency and wave amplitude were controlled by the use of a signal generator and signal amplifier. The reference data is acquired by a Brüel & Kjaer (B&K) module model 3160-A pattern equipment with PULSE Time Data Recorder software. Instrumentation for strain measurements was developed by simulating the strain gage measurement using a variable precision resistor. The reference data is acquired by a B & K module model 3160-A pattern equipment with PULSE Time Data Recorder software and two multimeters: OTC 55 series and MUL-280. The analysis range for these measurements is 0 to 80 Hz. The selected equipment demonstrated the DAQ system capability to perform vibration and deformation measurements with a resolution of 0.1 g and 100 μɛ respectively in the frequency range from 0 to 80 Hz, as well as obtain parameters from CAN J1939 protocol at the same time.
- Convergence of Industry 4.0 and Regenerative Engineering to boost development of scaffolds created by hybrid additive manufacturing(2017-12-05) Camargo Camrgo, Belinda; Rodríguez González, Ciro Ángel; Romero Díaz, David CarlosIndustry 4.0 and its underlying technologies, such as Internet of Things (IoT) and Cyber-Physical Systems (CPS), are usually portrayed as a way to enable communication in a workshop between the machinery and an intelligent control system, handle consumer demand for customized products, achieve a near-zero defect manufacturing process, and handle materials, energy consumption, and waste more efficiently, amongst others. Case studies on how the automotive, electronics, or aerospace industry benefit from Industry 4.0 implementation are readily available and surely, there are more to come. By contrast, scaffolds of Regenerative Engineering, are still in Research and Development and yet to be approved as a commercial regenerative procedure. A thorough analysis of the requirements was developed and the product manufacturing phases were modeled using Unified Modeling Language (UML). Business, structure, activity, class, and sequence diagrams, amongst others, are modeled using this standard and an ontology that converges Industry 4.0 technologies applied on Regenerative Engineering is established under the Ontology Web Language Description Logic (OWL-Dl). An architecture to augment a scaffold manufacturing cell with Industry 4.0 technologies is proposed. By using smart sensors, actuators, and the information they generate, a database with material and process variables is populated. This database can then be analyzed by smart algorithms to find the most effective parameters to manufacture a successful scaffold for tissue regeneration. Initial testing shows the feasibility of the proposed architecture and its ability to store relevant information of the produc
- Influencia del Enfriamiento con CO2 en el Corte Ortogonal de Elastómero Tipo SBR-1502 -Edición Única(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2010-12-01) Araceli Rivera Moreno; Rodríguez González, Ciro Ángel; Hernández Castillo, Luis Enrique; Elias Zuniga, Alex; Siller Carrillo, Héctor Rafael; Tecnológico de Monterrey, Campus MonterreyUn importante reto para la ingeniería es el desarrollo de aplicaciones dentro del campo de la biología y la medicina, tales como: chips biofluídicos, biosensores, sistemas de liberación controlada de medicamento, etc. En estos desarrollos una parte esencial está conformada por el uso de materiales elastoméricos. Los productos hechos de elastómeros generalmente se fabrican por compresión a condiciones controladas sin embargo, previo a su fabricación en serie se requiere de la elaboración de prototipos para probar su funcionamiento y buen desempeño. Entre los procesos de fabricación más convenientes para prototipado se encuentra el maquinado, sin embargo, debido a la naturaleza de los elastómeros, es complicado aplicar este proceso. Es por eso que aún es necesario generar información que eventualmente lleve a la satisfactoria fabricación de productos elastoméricos mediante el proceso de maquinado. En el presente trabajo de investigación se evalúa la influencia de diferentes variables, incluyendo el efecto de enfriamiento con C02 durante el proceso de torneado en corte ortogonal, de material elastomérico SBR-1502, principalmente se estudió la influencia sobre lacalidad de la pieza, la fuerza de torneado, y la generación de viruta. Los resultados demuestran que la temperatura es un factor que influye determinantemente en la calidad superficial, las fuerzas generadas, la precisión dimensional y la viruta que se genera en el proceso de maquinado de elastómeros.
- Finite element analysis of stretch bending for advanced high strength steels (AHSS)-Edición Única(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2009-05-01) González Zúñiga, Ángel; Rodríguez González, Ciro Ángel; Elías Zúñiga, Alex; Hendrichs Troeglen, Nicolás Jorge; Tecnológico de Monterrey, Campus MonterreyEight years ago, no vehicle produced in North America contained Advanced High Strength Steels (AHSS) but today almost every new vehicle coming on the market has applications of AHSS. AHSS enable the use of thinner components, which yields better vehicle performance and higher fuel efficiency. Stretch Bending Test (SBT) has been commonly used because it emulates bending and stretching conditions that are common in stamping processes. SBT can also be used to evaluate and rank material formability. The proposed methodology of this study is used to predict failure in stretch bending of AHSS using Finite Element Analysis (FEA). Different criteria are used in order to predict fracture in stretch bending of AHSS and one important factor is studied: punch radius vs. sheet thickness ratio (R/t). The proposed methodology is based on the works developed by [Sriram, 2003] and [Uko, 1977].
- Evaluation of micro-mechanical manufacturing processes for micro-fluidic devices(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2008-12-01) Jáuregui Santiago, Ana Laura; Siller Carrillo, Héctor Rafael; Rodríguez González, Ciro Ángel; Acevedo Mascarua, Joaquin; Elías Zúñiga, Alex; Tecnológico de Monterrey, Campus Monterrey; Programa de Graduados en Ingeniería; División de Ingeniería y Arquitectura; Campus MonterreyThe aim of this thesis is focused on the evaluation of different micro-mechanical technologies such as: Wire Electro-Discharge Machining/Sandblasting, Abrasive Water Jet and Micro-End Milling, for the fabrication of micro-fluidic devices, whose main components are miniaturized geometries known as micro-channels. In addition, Lithography even is not considered as a mechanical process is also evaluated against the other processes because is commonly used for the fabrication of small features. The micro-fluidic devices find their field of application in areas such as Medicine or Biotechnology, in which they are useful for dosifying drugs to the human body, analyze DNA or for cultivating cells. The materials that are used for the prototyping in each technology are: PDMS (Polydimethylsiloxane) for Lithography, cooper for H/ED/W/sandblasting, aluminum for Abrasive Water Jet and acrylic for Micro-End Milling. The evaluation consists in a comprehensive study of surface quality and topography, made with the help of advanced contact and non-contact devices over each prototype manufactured. Also economical considerations have been taken into account in order to choose the most appropriate manufacturing process for the prototyping of micro-fluidic devices.
- Impacto del cambio de aceleración en el tiempo de ciclo y error dinámico de los centros de mecanizado de alto rendimiento(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2006-12-01) Flores Hernández, Víctor Manuel; Rodríguez González, Ciro Ángel; ITESM-Campus MonterreyEn este trabajo de investigación se desarrolló una herramienta de bajo costo para la estimación de tiempo de ciclo en centros de mecanizado de alto rendimiento considerando el cambio de aceleración del movimiento de avance de los ejes de la máquina, el cual juega un papel trascendental durante el movimiento de avance. Debido a la cinemática de los ejes de los centros de mecanizado las trayectorias descritas por la herramienta presentan una diferencia con respecto a la trayectoria programada, la cual es conocida como error de contorno o de seguimiento, el cual se incrementa cuando no se tiene control sobre el cambio de aceleración (perfil de velocidad trapezoidal). Así mismo, los cambios abruptos en la aceleración axial generan vibraciones no deseadas que junto con el error de contorno tienen impacto en la calidad de la parte terminada. Por otra parte, cuando el cambio de aceleración es controlado (perfil de velocidad parabólico) se obtienen mecanizados de mayor precisión pero el tiempo de ciclo se incrementa. Durante esta investigación se realizaron experimentos de mecanizado con altos niveles de avance (hasta 16,000 mm/min) para evaluar el error dinámico de posición en función de diferentes niveles de cambio de aceleración proporcionada por el controlador Cuando se programa el mecanizado con control en el cambio de aceleración, el tiempo ideal difiere significativamente respecto al tiempo real con porcentajes de error hasta de 70%. En este trabajo se usó como caso de estudio el mecanizado del aspa para un aerogenerador con dirección de corte horizontal (X) y vertical (Y) a diferentes velocidades de avance y con diferentes valores de control de cambio de aceleración. Los experimentos fueron realizados en un centro de mecanizado Hurón KX-10 con controlador Siemens 840D. El centro de mecanizado fue calibrado para conocer su capacidad en términos de máxima aceleración y máximo cambio de aceleración. Posteriormente, se aplicó el método de bajo costo desarrollado en este trabajo para estimar el tiempo de ciclo. El modelo desarrollado estima el tiempo de ciclo real con un error máximo del 6%.
