Examinando por Materia "BOMBAS (MÁQUINAS)"
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Ítem Caracterización experimental de la pérdida rotacional (Rotating Stall) en una bomba centrífuga operando como turbina(Universidad EAFIT, 2016-03-14) Pérez Mesa, Jesús Alberto; Botero Herrera, Francisco JavierÍtem Digital platform approach for hydraulic characterization and detection of hydrodynamic phenomena in reversible turbomachines(Universidad EAFIT, 2022) Mejía Ocampo, David Alejandro; Botero Herrera, Francisco JavierHydropower is one of the most developed and utilized renewable energy sources in terms of installed capacity and reliability; therefore, it is one of the electricity production methods with the highest contribution worldwide and with an essential level of technological maturity. In recent years, the hydropower sector has shifted from large to small plants, due to water resource constraints and the effects of climate change. In addition, although less used, reversible hydro turbomachines are postulated as alternatives to offset the demand for intermittent and difficult to forecast renewable energy technologies. This paper presents the development and implementation of a digital platform based on real-time measurements for monitoring, recording, and analysis in the time and frequency domains of hydromechanical, dynamic, and electrical magnitudes. The resulting data are suitable for the characterization of hydraulic machines, and their technical diagnosis, allowing the detection of complex phenomena that may occur during their operation. To illustrate some of the capabilities of the platform, experimental tests were performed on a specific low-speed centrifugal pump, through its four-quadrant characteristic curve. The focus was on the measurement of pressure fluctuation and acceleration (vibrations) during operation at its best efficiency point (BEP) and at an off-design operating point where hydrodynamic instabilities were detected. Finally, the analysis and results are exposed, and the characteristics are presented.Ítem Evaluación experimental de la relación entre variables hidráulicas y eléctricas mediante cópulas y análisis espectral para una bomba centrífuga(Universidad EAFIT, 2022) Martínez Monsalve, Víctor Orlando; Botero Herrera, Francisco JavierÍtem Experimental rotordynamics and flow visualization approach for periodically reversed flows of a Francis - Type Pump - Turbine in generating mode at off - design operating conditions(Universidad EAFIT, 2012) Guzmán Díaz, Sebastián; Botero Herrera, Francisco JavierA non-conventional tufting visualization method along with an image processing development and specific applied technique adapted to the flow conditions is proposed and implemented on a reduced scale model of a Francis-type reversible pump-turbine in three different turbine stages such as turbine mode, runaway mode and turbine break mode, in order to visualize rotating stall phenomenon -- Fluorescent monofilament wires along with high speed image processing and pressure sensors were installed in the narrow and vane less gap between the impeller blades and guide vanes -- Pressure fluctuations were analyzed along with tuft visualization to describe the flow with and without rotating stallÍtem Optimización energética en sistemas de bombeo, desarrollo de un caso práctico(Universidad EAFIT, 2022) Valderrama García, Lina Marcela; Quirós Morales, Luis Fernando