No abstract

No abstract

An experimental comparison between two heat sinks systems has been performed. The area of the study is Guayaquil, Ecuador with an average annual temperature of 27 °C and an average annual relative humidity of 77% (UTM 0621517/09749485) where typical large HVAC systems with cooling towers are used. As a result of the high relative humidity in the area, the thermal efficiency of this type of heat exchanger is reduced. A geothermal heat exchanger cooling water using the constant and relatively low soil temperature is considered as a viable alternative for HVAC systems in this location. In this project, a prototype geothermal heat exchanger is built and experimentally compared with a cooling tower system. Through previous research, it was determined that the soil at this borehole consist of 5 % of landfill material; 86 % several strata of low plasticity silt, alternating silt; and 5 % sand. This location corresponds to the estuarine deposits of the Guayas River. The average soil temperature is 27 ° C, associated with a thermal conductivity of 1.87 W / m K and a thermal diffusivity of 0.085 m2 / day obtained from a Thermal Response Test of the soil. An experiment for the comparison of these two types of heat exchangers under a uniform heat load is designed and built. The cooling tower water installed has a capacity of 5 Tons of Refrigeration with a flow of 15 Gallons per minute. The geothermal heat exchanger consisting of four drilled to 42 meters deep vertical holes and connected in a parallel circuit. Both systems operate in periods of 8 and 12 hours during the hours of daylight. To simulate the thermal load in both cases, water is heated using two identical electric boilers with a nominal power of 9 kW each. Data from the energy consumption, and energy dissipation from each system is collected and analyzed. The Energy Efficiency Rating obtained for each system is on the order of 10.61 for the cooling tower water, and on the order of 14.78 for the geothermal heat exchanger, with savings of 61.7% in energy consumption and CO2 emissions by the system of geothermal cooling through better efficiency. We have also projected the costs of installation, operation and maintenance of both systems. Results suggest that despite the high cost of installation, a geothermal sink is a valid option for HVAC systems in cities or regions that have high temperatures and high humidity.

La tesis presentada propone construir un framework para el desarrollo de entornos virtuales de robótica educativa basados en un simulador 3D, que aporte características, motivaciones y recursos similares a los encontrados en el uso de material concreto, analizando el impacto de su uso en comparación con kits de robótica tradicionales.

El presente trabajo consiste en la propuesta de una nueva metodología llamada Diseño Profundo de Juegos cuyo objetivo es sentar las bases para desarrollar videojuegos que expandan los límites del medio. La propuesta parte del estado del arte actual, de las mecánicas experimentales y los procesos de diseño, así como también del enfoque sistémico de los juegos y su significado antropológico. Se expone además un conjunto de videojuegos cuyo desarrollo fue observado y utilizado como base para la realización de la presente metodología.