BUSCADOR RECOLECTA

Data include the active (kW) and reactive (kvar) power for the pilot area of H2020 RESOLVD project, each item in one column and with a time step of one hour and one year length.

Numerical Model for a 19th Century Hydrometric (Case 1: 1000 L/s inlet flow). Aquests datasets són els models numèrics que corresponen als 6 casos de simulacions fetes amb el software de CFD anomenat Flow3D.

Using a previous mechanical characterization of two types of material, several lab-test work have been done. The data shows the particle size distribution of these tests, all the inputs and the model simulation presented in the related paper to this data base. The new mathematical approach use the operative conditions and the feed particle size distribution to obtain a product, which is compared with the lab-test results, An improved approach is presented to model the product particle size distribution resulting from grinding in high-pressure roll crusher with the aim to be used in standard high-pressure grinding rolls (HPGR). This approach uses different breakage distribution function parameter values for a single particle compression condition and a bed compression condition. Two materials were used for the experiments; altered Ta-bearing granite and a calc-silicate tungsten ore. A set of experiments was performed with constant operative conditions, while varying a selected condition to study the influence of the equipment set-up on the model. The material was comminuted using a previously determined specific pressing force, varying the feed particle size, roll speed and the static gap. A fourth group of experiments were performed varying the specific pressing force. Experimental results show the high performance of the comminution in a high-pressure environment. The static gap was the key in order to control the product particle size. A mathematical approach to predict the product particle size distribution is presented and it showed a good fit when compared to experimental data. This is the case when a narrow particle size fraction feed is used, but the fit became remarkably good with a multi-size feed distribution. However, when varying the specific pressing force in the case of the calc-silicate material, the results were not completely accurate. The hypothesis of simultaneous single particle compression and bed compression for different size ranges and with different parameters of the distribution function was probed and reinforced by various simulations that exchanged bed compression parameters over the single particle compression distribution function, and vice versa.

Datos recopilados en el análisis de la colecciones docentes disponibles en los repositorios institucionales de las universidades españolas.

De data base shows the results of a new methodology to determine the breakage distribution function parameters to be used in High pressure grinding rolls modelling. The piston die test tries to simulate a high pressure enviroment, thus the resulted particle size distribution can be normalized to describe a breakage mechanism. Furthermore, one example of how to obtain the breakage function parameters is presented., The modelling of high pressure grinding rolls is described by the population balance model, a mass balance which includes several functions that are related to the mineral characteristics, material kinetics and operative conditions of the device. The breakage distribution function is one of these functions and refers to the way in which the daughter particles are generated by the process of comminution. The piston-die press is presented as a methodology to determine the breakage distribution function of two different materials, from the mechanical response point of view: altered granite and a cal-silicate material. The aim is to determine the relation between the operative conditions and the mineral characteristics in order to explain and predict the breakage function parameters. The materials were characterised using XRD and single compression strength tests. The altered granite is a brittle material, which generates more fines under single compression conditions compared to bed compression conditions, mainly due to the mineral composition and the response of the material to the breakage action. The cal-silicate material shows a normal trend in its breakage behaviour. As is expected, the mineralogical characterisation is a useful tool to predict the values of the parameters of the breakage distribution function.

Comunicación presentada en el VIII Simposio Iberoamericano en Ingeniería de Residuos: Hacia una gestión eficiente de los residuos, 17-18 Septiembre 2019, Asunción (Paraguay), La recogida separada es una de las etapas más importantes en la gestión de los residuos sólidos urbanos (RSU). En ella se procesan y recogen los RSU para una posterior aplicación de los métodos de valorización. En función de las condiciones económicas, técnicas, sociales y políticas del entorno se pueden aplicar diferentes alternativas de gestión de la recogida separada. El objetivo principal será la recolección de todas las corrientes de residuos utilizando el método más adecuado, de forma que se minimice el impacto ambiental, maximice el económico mediante un enfoque de economía circular y se cumplan los objetivos impuestos por la administración. No existe un único modelo para todas las poblaciones, vendrá en función de las características particulares de cada población así como la naturaleza y cantidad de los residuos. Para establecer el modelo será necesario conocer todas las alternativas existentes actualmente, ventajas e inconvenientes de cada una y los factores que afectan a su implantación, como el destino de los flujos de salida de RSU de los procesos de tratamiento, sobre todo cuando este es la valorización. En este trabajo se presenta un estudio detallado de las diferentes alternativas de separación de la fracción de la materia orgánica biodegradable y los distintos sistemas de recolección. Se explican sus características más relevantes y las ventajas e inconvenientes de cada una. A partir de este estudio y conociendo las circunstancias de la población, el técnico competente puede diseñar el modelo de gestión de la recogida más adecuado. Finalmente se presenta un ejemplo de aplicación.

Comunicació presentada a EDULEARN2019, 11th International Conference on Education and New Learning Technologies (July 1-3, 2019, Palma, Mallorca, Spain)., Recent studies corroborate the progressive implementation of Additive Manufacturing technologies (commonly known as 3D printing) in education, demonstrating several advantages. In the field of industrial design, the development of models during the design phase of product design helps designers in training to visualize their proposals. Today, 3D printing and traditional model-making techniques coexist in classrooms. With both techniques it is possible to achieve good results, but when it comes to evaluating them it is not so simple, since both ways of working are different and apparently the same evaluation criteria cannot be used in both cases, which could lead to comparative grievances. This work presents a series of rubrics that can help to evaluate the student's models in an objective way and under equal conditions, independently of the technique used: traditional o 3D printing. In order to do this, we started from a rubric made to evaluate traditional models, which was tested during a couple of academic years in other subject. This rubric was adapted to create a new rubric, which allowed to evaluate models made by 3D printing, looking for equivalent criteria with the previous rubric to guarantee a fair evaluation of both ways of working. The rubrics were tested experimentally in the subject ‘Prototypes: experimental workshop’, taught during the 4th year of the Bachelor's Degree in Industrial Design and Product Development Engineering at the Universitat Jaume I (Spain). Two groups of users assessed each work using these rubrics. The results showed, on the one hand, that both groups found it easy to evaluate the works using these rubrics, and on the other hand, that these rubrics allow for a fairly objective evaluation of the works, since the score obtained by both groups of users was very similar.