Diseño óptimo de un sistema de inyección convencional con bomba rotativa

Además de en las actas del congreso se publicó en: Anales de ingeniería mecánica, 12 (1), 618-624.XIII Congreso Nacional de Ingeniería Mecánica: Terrasa, 1998.El presente artículo se ocupa de la aplicación de un modelo de inyección de bomba rotativa al diseño de la misma. En éste se detalla un modelo del sistema de inyección, el cual se ha formado a partir del modelado de las diferentes cámaras que constituyen el sistema. Una vez validado el modelo, se desarrolló un método de optimización basado en una estructura tipo Newton discreto. El modelo utiliza de forma independiente dos grupos de variables de diseño. En un caso la ley de la leva y en otro parámetros del sistema de inyección. El algoritmo de optimización opera sobre el modelo del sistema de inyección hasta conseguir una ley de inyección prefijada

Frequency and characteristics of familial melanoma in Spain: The FAM-GEM-1 Study

Similar to that observed in other countries, familial melanoma accounts for 6.6% of melanoma diagnoses in Spain. Although no differences in the multivariate analysis were found, some better prognosis factors, such as Breslow index, seem more frequent in familial melanoma, which reflect a better early detection marker and/or a different biological behavior

Modeling and Experimental Validation of a Low-Cost Radiation Sensor Based on the Photovoltaic Effect for Building Applications

The energy consumed to cool buildings is very elevated and solar gains represent a high percentage of these cooling loads. To minimize the thermal load it is necessary to control external shading systems. This control requires continuous measurement of solar radiation in different locations of the building. However, for such applications the use of conventional irradiance sensors increases the cost and reduces the profitability of the installation. This paper is focused on the development, modeling, and experimental validation of low cost irradiation sensors based on photovoltaic effect in order to reduce the costs of dynamic external shading devices and to improve the profitability of the system. With this proposal, firstly, small commercial photovoltaic cells have been adapted for use as an irradiation measurement device. Subsequently, quasi-stationary and continuous experimental measurements of these silicon cells, facing south and installed horizontally, have been carried out in Jaén (Spain) in 2009 and 2010. Finally, a nonlinear multiparameter function has been developed to evaluate the irradiance using the electric current generated by the cell, cell temperature, ambient temperature, and absolute humidity. A favorable agreement between the model predictions and experimental data has been observed with a coefficient of determination around 0.996 for all cells