Ponències/Comunicacions de congressoshttp://hdl.handle.net/2117/34202024-03-28T22:46:43Z2024-03-28T22:46:43ZTheorical and descriptive analysis of the wave energy in the Barcelona World RaceGuarga, FerranBosch Tous, RicardoCasals Torrens, PauCastells Sanabra, Marcel·lahttp://hdl.handle.net/2117/266572024-01-14T05:53:15Z2015-03-11T10:19:10ZTheorical and descriptive analysis of the wave energy in the Barcelona World Race
Guarga, Ferran; Bosch Tous, Ricardo; Casals Torrens, Pau; Castells Sanabra, Marcel·la
The main objective of this paper is the presentation of a theoretical study of the wave energy in some zones of the Barcelona World Race (BWR) considering different theories, how much of this energy is transferred to the boat and if it is possible to use that energy, as propulsion energy.
Nowadays, the absorption of wave energy (offshore, inshore or on board) is low utilized and has important costs. That makes this subject become more interesting. The first section of this paper is a study of the movement of the waves with different descriptions and of the energy potential depending on characteristic’s value. Secondly, a categorization of the wave’s characteristics is done of a part of BWR with the objective
to be able to do an energy atlas of different areas. After that, a model of the vertical motion (simplified motion) is done in order to express the energy which is in the kinetic
phase difference between the wave action and the boat reaction. Finally, all factors in the synchronism motion between wave and boat have been evaluated (in surf navigation) in order to analyze the results of equilibrium and the result force with different power propulsion.
2015-03-11T10:19:10ZGuarga, FerranBosch Tous, RicardoCasals Torrens, PauCastells Sanabra, Marcel·laThe main objective of this paper is the presentation of a theoretical study of the wave energy in some zones of the Barcelona World Race (BWR) considering different theories, how much of this energy is transferred to the boat and if it is possible to use that energy, as propulsion energy.
Nowadays, the absorption of wave energy (offshore, inshore or on board) is low utilized and has important costs. That makes this subject become more interesting. The first section of this paper is a study of the movement of the waves with different descriptions and of the energy potential depending on characteristic’s value. Secondly, a categorization of the wave’s characteristics is done of a part of BWR with the objective
to be able to do an energy atlas of different areas. After that, a model of the vertical motion (simplified motion) is done in order to express the energy which is in the kinetic
phase difference between the wave action and the boat reaction. Finally, all factors in the synchronism motion between wave and boat have been evaluated (in surf navigation) in order to analyze the results of equilibrium and the result force with different power propulsion.Computational fluid dynamics of porous structures: Theoretical, experimental and natural modelsGómez González, SergioLópez López, JoséFernández Aguado, EnriqueVlad, María Danielahttp://hdl.handle.net/2117/251102020-07-23T22:56:32Z2014-12-19T13:04:50ZComputational fluid dynamics of porous structures: Theoretical, experimental and natural models
Gómez González, Sergio; López López, José; Fernández Aguado, Enrique; Vlad, María Daniela
2014-12-19T13:04:50ZGómez González, SergioLópez López, JoséFernández Aguado, EnriqueVlad, María DanielaA new cannula design to further improve cement injection in vertebroplastyGómez González, SergioVlad, María DanielaLópez López, JoséFernández Aguado, Enriquehttp://hdl.handle.net/2117/250992020-07-23T23:01:18Z2014-12-19T09:53:47ZA new cannula design to further improve cement injection in vertebroplasty
Gómez González, Sergio; Vlad, María Daniela; López López, José; Fernández Aguado, Enrique
2014-12-19T09:53:47ZGómez González, SergioVlad, María DanielaLópez López, JoséFernández Aguado, EnriqueCharacterisation and three-dimensional reconstruction of synthetic bone model foamGómez González, SergioVlad, María DanielaLópez López, JoséFernández Aguado, Enriquehttp://hdl.handle.net/2117/250982020-07-23T21:50:52Z2014-12-19T09:48:13ZCharacterisation and three-dimensional reconstruction of synthetic bone model foam
Gómez González, Sergio; Vlad, María Daniela; López López, José; Fernández Aguado, Enrique
2014-12-19T09:48:13ZGómez González, SergioVlad, María DanielaLópez López, JoséFernández Aguado, EnriqueHysteresis motor with self sustained rotor for high speed applicationsGranados García, Javier A.J.Márquez, IsabelMora Serrano, JavierFontcuberta, JosepObradors Berenguer, XavierPallarés, J.Bosch Tous, Ricardohttp://hdl.handle.net/2117/231832021-10-03T04:41:54Z2014-06-06T15:46:44ZHysteresis motor with self sustained rotor for high speed applications
Granados García, Javier A.J.; Márquez, Isabel; Mora Serrano, Javier; Fontcuberta, Josep; Obradors Berenguer, Xavier; Pallarés, J.; Bosch Tous, Ricardo
Pellets of YBCO HTSC have been used to construct a cylindrically shaped rotor. A four poles/four phases stator has been wound in order to build a motor. The motor behaves as an hysteresis motor when it starts and as synchronous in the steady state. The levitation forces associated to the flux inside the rotor region and the flux dispersed at the basal surfaces contribute to maintain the rotor anchored to its cavity in a self-sustained configuration. Power and torque in the synchronous regime, centering forces, static excitation field mapping and field distribution at the HTSC surface have been investigated.
2014-06-06T15:46:44ZGranados García, Javier A.J.Márquez, IsabelMora Serrano, JavierFontcuberta, JosepObradors Berenguer, XavierPallarés, J.Bosch Tous, RicardoPellets of YBCO HTSC have been used to construct a cylindrically shaped rotor. A four poles/four phases stator has been wound in order to build a motor. The motor behaves as an hysteresis motor when it starts and as synchronous in the steady state. The levitation forces associated to the flux inside the rotor region and the flux dispersed at the basal surfaces contribute to maintain the rotor anchored to its cavity in a self-sustained configuration. Power and torque in the synchronous regime, centering forces, static excitation field mapping and field distribution at the HTSC surface have been investigated.Extended magnetization of superconducting pellets in highly inhomogeneous magnetic fieldMaynou Gil, RogerLópez López, JoséGranados García, Javier A.J.Torres Cámara, RicardoBosch Tous, Ricardohttp://hdl.handle.net/2117/204672020-07-23T21:15:32Z2013-10-25T13:24:40ZExtended magnetization of superconducting pellets in highly inhomogeneous magnetic field
Maynou Gil, Roger; López López, José; Granados García, Javier A.J.; Torres Cámara, Ricardo; Bosch Tous, Ricardo
The magnetization of superconducting pellets is a worth point in the development of trapped flux superconducting motors. Experimental and simulated data have been reported extensively according to
the framework of one or several pulses of a homogeneous magnetizing field applied to a pellet or a set of pellets. In case of cylindrical rotors of low power motors with radial excitation, however, the use of the
copper coils to produce the starting magnetization of the pellets produces a highly inhomogeneous magnetic field which cannot be reduced to a 2D standard model. In this work we present an analysis of
the magnetization of the superconducting cylindrical rotor of a small motor by using a commercial FEM program, being the rotor magnetized by the working copper coils of the motor. The aim of the study is a
report of the magnetization obtained and theheat generated in the HTSC pellets.
2013-10-25T13:24:40ZMaynou Gil, RogerLópez López, JoséGranados García, Javier A.J.Torres Cámara, RicardoBosch Tous, RicardoThe magnetization of superconducting pellets is a worth point in the development of trapped flux superconducting motors. Experimental and simulated data have been reported extensively according to
the framework of one or several pulses of a homogeneous magnetizing field applied to a pellet or a set of pellets. In case of cylindrical rotors of low power motors with radial excitation, however, the use of the
copper coils to produce the starting magnetization of the pellets produces a highly inhomogeneous magnetic field which cannot be reduced to a 2D standard model. In this work we present an analysis of
the magnetization of the superconducting cylindrical rotor of a small motor by using a commercial FEM program, being the rotor magnetized by the working copper coils of the motor. The aim of the study is a
report of the magnetization obtained and theheat generated in the HTSC pellets.Salinity effect on the corona onset for a 765 kV AC substation connectorHernández Guiteras, JoanRiba Ruiz, Jordi-RogerSanllehi, JosepBosch Tous, Ricardohttp://hdl.handle.net/2117/171272020-07-23T20:38:11Z2012-12-13T10:52:45ZSalinity effect on the corona onset for a 765 kV AC substation connector
Hernández Guiteras, Joan; Riba Ruiz, Jordi-Roger; Sanllehi, Josep; Bosch Tous, Ricardo
Outdoor substations placed in coastal areas are affected by saline environments. In the technical literature it is found extensive information regarding insulations problems in presence of saline environments [1]. The accumulation of salts and other contaminants promotes the onset of partial discharges on the devices subjected to very high voltages. Insulators are also affected by this phenomenon. While rainfall has a cleaning effect on the insulator surface, humidity enhances the corrosion effect and degrades the performance of insulation [2], favouring onset conditions for partial discharge. Corrosion due to saline environments or dirt increases the roughness of the insulator surface, thus facilitating the appearance of partial discharges [3]. It is well known that the air pollution has a great impact on metals corrosion. Chloride ions are common in coastal environments, because seawater acts as a source of air mineralization. Deposition of chloride ions on metal surfaces intensifies metallic corrosion, thus degrading the conductor surface [4]. In this work the behaviour of a 765 kVRMS AC (line-to-line voltage) outdoor substation connector is analyzed when operating under both dry conditions and under wet saline environments by means of three-dimensional finite elements simulations (3D-FEM). FEM simulations show that the electric field strength in the connector surroundings does not exceed the electric breakdown strength for air under clean and dry atmospheric conditions when energized at its rated voltage, 765 kVRMS AC (line-to-line). These results are corroborated by means of experimental measurements carried out in a high-voltage laboratory. Both, the laboratory tests and the 3D-FEM simulations performed in this study concluded that the corona onset voltage is approximately 980 kVRMS AC (line-to-line voltage). Additionally, 3D-FEM simulations allow detecting the connector weakest points regarding to electrical stress. Hence, this software allows redesigning the connector geometry to optimize its performance, thus minimizing the corona occurrence risk and their associated unwanted effects. Additionally, FEM simulations performed under a saline atmosphere were carried out by including a thin conductive saline moisture layer acting as a wetting film on the connector surface. Results revealed that saline environments worsen the connector behaviour, thus favouring corona onset conditions and their related effects.Outdoor substations placed in coastal areas are affected by saline environments. In the technical literature it is found extensive information regarding insulations problems in presence of saline environments [1]. The accumulation of salts and other contaminants promotes the onset of partial discharges on the devices subjected to very high voltages. Insulators are also affected by this phenomenon. While rainfall has a cleaning effect on the insulator surface, humidity enhances the corrosion effect and degrades the performance of insulation [2], favouring onset conditions for partial discharge. Corrosion due to saline environments or dirt increases the roughness of the insulator surface, thus facilitating the appearance of partial discharges [3]. It is well known that the air pollution has a great impact on metals corrosion. Chloride ions are common in coastal environments, because seawater acts as a source of air mineralization. Deposition of chloride ions on metal surfaces intensifies metallic corrosion, thus degrading the conductor surface [4]. In this work the behaviour of a 765 kVRMS AC (line-to-line voltage) outdoor substation connector is analyzed when operating under both dry conditions and under wet saline environments by means of three-dimensional finite elements simulations (3D-FEM). FEM simulations show that the electric field strength in the connector surroundings does not exceed the electric breakdown strength for air under clean and dry atmospheric conditions when energized at its rated voltage, 765 kVRMS AC (line-to-line). These results are corroborated by means of experimental measurements carried out in a high-voltage laboratory. Both, the laboratory tests and the 3D-FEM simulations performed in this study concluded that the corona onset voltage is approximately 980 kVRMS AC (line-to-line voltage). Additionally, 3D-FEM simulations allow detecting the connector weakest points regarding to electrical stress. Hence, this software allows redesigning the connector geometry to optimize its performance, thus minimizing the corona occurrence risk and their associated unwanted effects. Additionally, FEM simulations performed under a saline atmosphere were carried out by including a thin conductive saline moisture layer acting as a wetting film on the connector surface. Results revealed that saline environments worsen the connector behaviour, thus favouring corona onset conditions and their related effects.
2012-12-13T10:52:45ZHernández Guiteras, JoanRiba Ruiz, Jordi-RogerSanllehi, JosepBosch Tous, RicardoOutdoor substations placed in coastal areas are affected by saline environments. In the technical literature it is found extensive information regarding insulations problems in presence of saline environments [1]. The accumulation of salts and other contaminants promotes the onset of partial discharges on the devices subjected to very high voltages. Insulators are also affected by this phenomenon. While rainfall has a cleaning effect on the insulator surface, humidity enhances the corrosion effect and degrades the performance of insulation [2], favouring onset conditions for partial discharge. Corrosion due to saline environments or dirt increases the roughness of the insulator surface, thus facilitating the appearance of partial discharges [3]. It is well known that the air pollution has a great impact on metals corrosion. Chloride ions are common in coastal environments, because seawater acts as a source of air mineralization. Deposition of chloride ions on metal surfaces intensifies metallic corrosion, thus degrading the conductor surface [4]. In this work the behaviour of a 765 kVRMS AC (line-to-line voltage) outdoor substation connector is analyzed when operating under both dry conditions and under wet saline environments by means of three-dimensional finite elements simulations (3D-FEM). FEM simulations show that the electric field strength in the connector surroundings does not exceed the electric breakdown strength for air under clean and dry atmospheric conditions when energized at its rated voltage, 765 kVRMS AC (line-to-line). These results are corroborated by means of experimental measurements carried out in a high-voltage laboratory. Both, the laboratory tests and the 3D-FEM simulations performed in this study concluded that the corona onset voltage is approximately 980 kVRMS AC (line-to-line voltage). Additionally, 3D-FEM simulations allow detecting the connector weakest points regarding to electrical stress. Hence, this software allows redesigning the connector geometry to optimize its performance, thus minimizing the corona occurrence risk and their associated unwanted effects. Additionally, FEM simulations performed under a saline atmosphere were carried out by including a thin conductive saline moisture layer acting as a wetting film on the connector surface. Results revealed that saline environments worsen the connector behaviour, thus favouring corona onset conditions and their related effects.Outdoor substations placed in coastal areas are affected by saline environments. In the technical literature it is found extensive information regarding insulations problems in presence of saline environments [1]. The accumulation of salts and other contaminants promotes the onset of partial discharges on the devices subjected to very high voltages. Insulators are also affected by this phenomenon. While rainfall has a cleaning effect on the insulator surface, humidity enhances the corrosion effect and degrades the performance of insulation [2], favouring onset conditions for partial discharge. Corrosion due to saline environments or dirt increases the roughness of the insulator surface, thus facilitating the appearance of partial discharges [3]. It is well known that the air pollution has a great impact on metals corrosion. Chloride ions are common in coastal environments, because seawater acts as a source of air mineralization. Deposition of chloride ions on metal surfaces intensifies metallic corrosion, thus degrading the conductor surface [4]. In this work the behaviour of a 765 kVRMS AC (line-to-line voltage) outdoor substation connector is analyzed when operating under both dry conditions and under wet saline environments by means of three-dimensional finite elements simulations (3D-FEM). FEM simulations show that the electric field strength in the connector surroundings does not exceed the electric breakdown strength for air under clean and dry atmospheric conditions when energized at its rated voltage, 765 kVRMS AC (line-to-line). These results are corroborated by means of experimental measurements carried out in a high-voltage laboratory. Both, the laboratory tests and the 3D-FEM simulations performed in this study concluded that the corona onset voltage is approximately 980 kVRMS AC (line-to-line voltage). Additionally, 3D-FEM simulations allow detecting the connector weakest points regarding to electrical stress. Hence, this software allows redesigning the connector geometry to optimize its performance, thus minimizing the corona occurrence risk and their associated unwanted effects. Additionally, FEM simulations performed under a saline atmosphere were carried out by including a thin conductive saline moisture layer acting as a wetting film on the connector surface. Results revealed that saline environments worsen the connector behaviour, thus favouring corona onset conditions and their related effects.Sistemas internos de garantía de la calidad (SIGC): necesidad y retoCarral Mahia, Eva MªPérez Gracia, María de la VegaCodinas, XavierLópez López, JoséGarcía Alzórriz, Juan AntonioBuenestado Caballero, PabloTorres Cámara, RicardoMartínez Sánchez, JoanVelasco Quesada, Guillermohttp://hdl.handle.net/2117/130432020-07-23T23:07:40Z2011-07-26T08:01:13ZSistemas internos de garantía de la calidad (SIGC): necesidad y reto
Carral Mahia, Eva Mª; Pérez Gracia, María de la Vega; Codinas, Xavier; López López, José; García Alzórriz, Juan Antonio; Buenestado Caballero, Pablo; Torres Cámara, Ricardo; Martínez Sánchez, Joan; Velasco Quesada, Guillermo
La Escuela Universitaria de Ingeniería Técnica Industrial de Barcelona (EUETIB) está
diseñando su SIGC propio, teniendo en cuenta las características del centro, las directrices de la Universidad Politécnica de Cataluña y de las agencias de calidad, la formación que se requiere para sus estudiantes y los resultados que se observan en otros centros de éste y de otros países en los que ya se han implantado los sistemas de calidad. En una época de crisis y de cambios, en la que las titulaciones deben adaptarse al Espacio Europeo de Educación Superior (EEES), el diseño de un sistema de calidad deviene una necesidad y un reto para la EUETIB.
2011-07-26T08:01:13ZCarral Mahia, Eva MªPérez Gracia, María de la VegaCodinas, XavierLópez López, JoséGarcía Alzórriz, Juan AntonioBuenestado Caballero, PabloTorres Cámara, RicardoMartínez Sánchez, JoanVelasco Quesada, GuillermoLa Escuela Universitaria de Ingeniería Técnica Industrial de Barcelona (EUETIB) está
diseñando su SIGC propio, teniendo en cuenta las características del centro, las directrices de la Universidad Politécnica de Cataluña y de las agencias de calidad, la formación que se requiere para sus estudiantes y los resultados que se observan en otros centros de éste y de otros países en los que ya se han implantado los sistemas de calidad. En una época de crisis y de cambios, en la que las titulaciones deben adaptarse al Espacio Europeo de Educación Superior (EEES), el diseño de un sistema de calidad deviene una necesidad y un reto para la EUETIB.Correlación entre la nota de ingreso a los estudios de grado de ámbito industrial y los resultados académicos obtenidos en el primer año de estudios de gradoLópez López, JoséBuenestado Caballero, PabloPérez Gracia, María de la VegaGarcía Alzórriz, Juan AntonioTorres Cámara, RicardoMartínez Sánchez, JoanVelasco Quesada, Guillermohttp://hdl.handle.net/2117/130422020-07-23T21:31:23Z2011-07-26T07:45:33ZCorrelación entre la nota de ingreso a los estudios de grado de ámbito industrial y los resultados académicos obtenidos en el primer año de estudios de grado
López López, José; Buenestado Caballero, Pablo; Pérez Gracia, María de la Vega; García Alzórriz, Juan Antonio; Torres Cámara, Ricardo; Martínez Sánchez, Joan; Velasco Quesada, Guillermo
El presente trabajo estudia la relación de la nota de acceso al centro con las calificaciones académicas obtenidas por los estudiantes de primer curso de Grado una vez transcurrido el primer año de implantación en la Escuela Universitaria de Ingeniería Técnica Industrial de Barcelona (EUETIB). En este trabajo se discute sobre los resultados obtenidos en función de la procedencia de los estudiantes, Bachillerato o Ciclos formativos de grado superior.
2011-07-26T07:45:33ZLópez López, JoséBuenestado Caballero, PabloPérez Gracia, María de la VegaGarcía Alzórriz, Juan AntonioTorres Cámara, RicardoMartínez Sánchez, JoanVelasco Quesada, GuillermoEl presente trabajo estudia la relación de la nota de acceso al centro con las calificaciones académicas obtenidas por los estudiantes de primer curso de Grado una vez transcurrido el primer año de implantación en la Escuela Universitaria de Ingeniería Técnica Industrial de Barcelona (EUETIB). En este trabajo se discute sobre los resultados obtenidos en función de la procedencia de los estudiantes, Bachillerato o Ciclos formativos de grado superior.Analysis of transient behavior during starter compensated of asynchronous motors propellant in low-powered electric boatsBosch Tous, RicardoCasals Torrens, PauGrau-Mir, RamónBarsan, Eugenhttp://hdl.handle.net/2117/123662024-01-14T02:52:26Z2011-04-14T08:18:57ZAnalysis of transient behavior during starter compensated of asynchronous motors propellant in low-powered electric boats
Bosch Tous, Ricardo; Casals Torrens, Pau; Grau-Mir, Ramón; Barsan, Eugen
2011-04-14T08:18:57ZBosch Tous, RicardoCasals Torrens, PauGrau-Mir, RamónBarsan, Eugen