Alfredo Quijano López - Academia.edu (original) (raw)
Papers by Alfredo Quijano López
DYNA
This article reviews the current status and future prospects of solid-state batteries. The study ... more This article reviews the current status and future prospects of solid-state batteries. The study focuses on the description of the challenges and needs for the technological development of solid-state batteries and the research aimed at solving current and future challenges. Finally, the projects related to this type of technology within the Horizon 2020 programme are reviewed.
DYNA
En este artículo se revisa el estado actual y las perspectivas de futuro de las baterías de estad... more En este artículo se revisa el estado actual y las perspectivas de futuro de las baterías de estado sólido. Se realiza un estudio centrado en la descripción de los retos y las necesidades para el desarrollo tecnológico para las baterías de estado sólido y las investigaciones destinadas a solventar los retos actuales y futuros. Finalmente, se revisan los proyectos relacionados con este tipo de tecnología dentro del programa Horizon 2020.
DYNA INGENIERIA E INDUSTRIA, 2017
En este artículo se revisan las necesidades y objetivos futuros dentro del campo del almacenamien... more En este artículo se revisan las necesidades y objetivos futuros dentro del campo del almacenamiento de energía y el papel de las baterías en el mismo. El estudio se centra en describir cuales son los retos y las necesidades de las baterías para electromovilidad y aplicaciones en red, así como el grado de desarrollo y proyección a futuro de diferentes tecnologías que se barajan como las "baterías del futuro". Finalmente, se revisan los proyectos relacionadas con baterías dentro del programa Horizon 2020.
Polysaccharides, May 3, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Journal of Electrostatics
La premisa fundamental del proyecto WiseGRID, que se está desarrollando en el marco del programa ... more La premisa fundamental del proyecto WiseGRID, que se está desarrollando en el marco del programa H2020, es mostrar como las Smart Grids pueden contribuir a la creación de un mercado energético europeo abierto, democrático y centrado en los ciudadanos. Se pretende demostrar como en las futuras microrredes y comunidades energéticas locales, el rol activo del consumidor es un componente necesario en el funcionamiento del mercado energético. Este trabajo describe los módulos clave desarrollados dentro del ecosistema WiseGRID que consiste en un marco coherente y sinérgico donde las diferentes soluciones basadas en integración de energías renovables, ESS, electromovilidad y autoconsumo, comparten y proporcionan servicios y funcionalidades entre sí.
Molecules, 2020
Sustainable activated carbon can be obtained from the pyrolysis/activation of biomass wastes comi... more Sustainable activated carbon can be obtained from the pyrolysis/activation of biomass wastes coming from different origins. Carbon obtained in this way shows interesting properties, such as high surface area, electrical conductivity, thermal and chemical stability, and porosity. These characteristics among others, such as a tailored pore size distribution and the possibility of functionalization, lead to an increased use of activated carbons in catalysis. The use of activated carbons from biomass origins is a step forward in the development of more sustainable processes enhancing material recycling and reuse in the frame of a circular economy. In this article, a perspective of different heterogeneous catalysts based on sustainable activated carbon from biomass origins will be analyzed focusing on their properties and catalytic performance for determined energy-related applications. In this way, the article aims to give the reader a scope of the potential of these tailor-made sustain...
Journal of Electrostatics, 2017
The development of cellular piezoelectric polymers has shown very promising results thanks to the... more The development of cellular piezoelectric polymers has shown very promising results thanks to their high d 33 piezoelectric constants which make them candidates for many applications. Cellular piezoelectric polymers, known as ferroelectrets, are obtained by means of an activation process which consists in generating an internal dipole with electrostatic charges produced by internal electric discharges. The most common system for this activation process is the application of a corona discharge on the surface of the sample in order to produce a high internal electric field. The theoretical electrostatic model of the process which is widely used is the Sessler model which relates the internal surface charge density, the air and polymer layers thickness, the dielectric permittivity of the polymer and the Young's Modulus of the cellular material to the d 33 piezoelectric constant. In our work, we relate the internal charges of the material with the d 33 piezoelectric constant by means of a surface potential scanning of cellular polypropylene biaxially stretched samples. Samples were charged by a corona discharge controlled with a triode electrode. Surface potentials were high enough to generate internal discharges and obtain measurable d 33 piezoelectric constants but low enough to be measured with spatial resolution by means of a 3kV electrostatic probe. Surface potential profiles showed some deviations from the expected bell-shape profile due to the internal electric field generated by the internal static charge. These deviations can be numerically related to the measured d 33 piezoelectric constant with the electrostatic Sessler model.
DYNA INGENIERIA E INDUSTRIA, 2014
Applied Physics Letters, 2013
DYNA INGENIERIA E INDUSTRIA, 2015
Actualmente se estan desarrollando nuevos tipos de baterias con resultados prometedores tanto par... more Actualmente se estan desarrollando nuevos tipos de baterias con resultados prometedores tanto para su aplicacion en sistemas estacionarios como moviles.
E3S Web of Conferences
The need for new clean energy sources for portable devices in biomedical, agro-food industry and ... more The need for new clean energy sources for portable devices in biomedical, agro-food industry and environmental related sectors boosts scientists towards the development of new strategies for energy harvesting for their application in biodevices development. In this sense, enzymatic biofuel cells (BFCs) have gained much attention in the last years. This work faces the challenge of develop new generation of BFCs able to be adapted to remote and personal monitoring devices within the framework of wearable technologies. To this aim, one of the main challenges consists of the development of conductive and biocompatible electrodes, which constitute a challenge itself due to the non-conductive capabilities of most of the biocompatible supports. Additionally, bioelectrodes may achieve good mechanical properties and resilience in order to be suitable for the envisioned application, which involves exposure to deformation during long-term use. Furthermore, it is desirable that the systems deve...
IEEE Transactions on Industry Applications
Predictive maintenance of electric motors is a topic of increasing importance in many industrial ... more Predictive maintenance of electric motors is a topic of increasing importance in many industrial applications. The mining industry is not an exception; many electric motors operating in mining facilities are critical machines and their unexpected failures may imply significant losses and can be hazardous for the users. Due to these facts, an increasing research effort has been dedicated to investigate on new techniques that are able to provide a reliable diagnostic of the motor condition. Over recent years, monitoring of electrical quantities (e.g. motor currents) has emerged as a very attractive option for determining the health of several motor parts (rotor, eccentricities, bearings) due to its very interesting advantages: possibility of remote motor monitoring, non-invasive nature, simple application, broad fault coverage…The traditional methods based on analysis of motor currents during steady-state operation (MCSA) are being complemented, when not replaced, by more reliable approaches. This work applies an innovative transient based methodology (ATCSA) to several case studies referred to large motors operating in mining facilities. The results prove how this modern methodology enables to overcome some important drawbacks of the classical MCSA, such as its unsuitability under varying speed conditions, and may provide an earlier indication of rotor electrical asymmetries under such working conditions.
The determination of the damper cage health is a matter of great importance in those industries t... more The determination of the damper cage health is a matter of great importance in those industries that use large synchronous motors in their processes. In the past, unexpected damages of that element implied economic losses amounting up to several million $. The problem is that, in the technical literature, there is a lack of non-invasive techniques enabling the reliable condition monitoring of this element. This explains the fact that, in industry, rudimentary methods are still employed to determine its condition. This paper proposes the analysis of the stray flux as a way to determine the condition of the damper cage. The paper shows that the analysis of the stray flux under starting yields characteristic time-frequency signatures of the fault components that can be used to reliably determine the condition of the damper. Moreover, the analysis of the stray flux at steady-state operation under asynchronous mode could give useful information to this end. The paper also analyses the in...
DYNA
The secure integration of electric vehicle (EV) plays a key role in the energy transition through... more The secure integration of electric vehicle (EV) plays a key role in the energy transition through a resilient and decarbonised economy. However, a massive EV penetration means a rise in electricity demand with negative consequences to the distribution systems (voltage drops, branches congestion, etc) if the charging infrastructure is not cybersecure and does not perform smart charging mechanisms. Furthermore, these new infrastructures and their operating procedures provide new chances to cyberattacks to be performed, aimed at either exploiting those grid vulnerabilities or acquiring some user’s private information. Therefore, to ease the secure integration of EV charging infrastructures in the future network, this paper presents a three-level actuation methodology for charging infrastructures, which includes active management of EV supply equipment (EVSE) to allow dynamic control of charges, installation of ancillary protection systems, planning of EVSE’s location within the distrib...
Energies
Distributed energy storage may play a key role in the operation of future low-carbon power system... more Distributed energy storage may play a key role in the operation of future low-carbon power systems as they can help to facilitate the provision of the required flexibility to cope with the intermittency and volatility featured by renewable generation. Within this context, this paper addresses an optimization methodology that will allow managing distributed storage systems of different technology and characteristics in a specific distribution network, taking into account not only the technical aspects of the network and the storage systems but also the uncertainties linked to demand and renewable energy variability. The implementation of the proposed methodology will allow facilitating the integration of energy storage systems within future smart grids. This paper’s results demonstrate numerically the good performance of the developed methodology.
Coupling device for high bandwidth power lines. # To measure discharge pulses caused by improper ... more Coupling device for high bandwidth power lines. # To measure discharge pulses caused by improper isolation line and / or communication signals as transmitted by the power line. Comprises a filter? T? (2), which in turn includes an inductor (L), an input capacitor (Ce) of line connection and an output connection to a measuring pulse discharge and / or measuring equipment communication signals transmitted by the line. The invention is novel in that the input capacitor (Ce) is high voltage and at least inductor is constituted by a circuit simulation induction, obtaining a device large bandwidth from units of KHz to tens of MHz, with a good frequency response so far unknown.
2020 8th International Conference on Smart Grid (icSmartGrid), 2020
Flexibility markets may play a key role in the operation of future low-carbon power systems as th... more Flexibility markets may play a key role in the operation of future low-carbon power systems as they can help to facilitate the provision of the required flexibility to cope with the intermittency and volatility featured by renewable generation. Within this context, this paper addresses the participation of an aggregator of residential customers in flexibility markets through intelligent management of the flexible home appliances of the customers. In particular, a novel methodology is proposed to maximize the benefits of both, namely the aggregator and its customers. The methodology relies on an efficient method wherein two types of modules are iteratively executed until a win-win solution is achieved. The first module is based on an optimization model which aims to maximize the economic profit earned by an aggregator that offers flexibility provided by its customers in local flexibility markets. On the contrary, the second module consists of a local platform for residential customer...
The 2021 Conference on Artificial Life, 2021
Growing cities are a world-wide phenomenon and simultaneously awareness about potential dangers d... more Growing cities are a world-wide phenomenon and simultaneously awareness about potential dangers due to air pollution, heat, and pathogens is increasing. Integrated and permanent monitoring of environmental features in cities can help to establish an early warning system and to provide data for policy makers. In our new project ‘WatchPlant,’ we propose a green approach for urban monitoring by a network of sensors tightly coupled with natural plants. We want to develop a sustainable, energy-efficient bio-hybrid system that harvests energy from living plants and utilizes methods of phytosensing, that is, using natural plants as sensors. We present our concept, here with focus on Alife-related methods operating on the gathered plant data and the bio-hybrid network. With a self-organizing network of sensors, that are alive, we hope to contribute to our future of livable green cities.
Dyna, 2021
La integracion de manera segura del vehiculo electrico (EV) es una pieza clave en la transicion e... more La integracion de manera segura del vehiculo electrico (EV) es una pieza clave en la transicion energetica hacia una economia descarbonizada y resiliente. Sin embargo, una alta penetracion del EV supone un incremento de la demanda electrica, con consecuencias negativas sobre las redes de distribucion (caidas de tension, congestion de lineas, etc.) si la infraestructura no esta protegida y no se introducen mecanismos de carga controlada. Ademas, estas nuevas infraestructuras y su modo de operacion estan expuestas a la realizacion de posibles ciberataques que buscan explotar las vulnerabilidades de la red, o bien obtener acceso a la informacion privada del usuario. Asi pues, con el objetivo de facilitar la integracion segura de las infraestructuras de recarga en el sistema electrico, este articulo presenta una metodologia de actuacion frente a ciberataques a tres niveles para infraestructuras de recarga, que incluye la gestion activa de las estaciones de recarga (EVSE) para permitir e...
DYNA
This article reviews the current status and future prospects of solid-state batteries. The study ... more This article reviews the current status and future prospects of solid-state batteries. The study focuses on the description of the challenges and needs for the technological development of solid-state batteries and the research aimed at solving current and future challenges. Finally, the projects related to this type of technology within the Horizon 2020 programme are reviewed.
DYNA
En este artículo se revisa el estado actual y las perspectivas de futuro de las baterías de estad... more En este artículo se revisa el estado actual y las perspectivas de futuro de las baterías de estado sólido. Se realiza un estudio centrado en la descripción de los retos y las necesidades para el desarrollo tecnológico para las baterías de estado sólido y las investigaciones destinadas a solventar los retos actuales y futuros. Finalmente, se revisan los proyectos relacionados con este tipo de tecnología dentro del programa Horizon 2020.
DYNA INGENIERIA E INDUSTRIA, 2017
En este artículo se revisan las necesidades y objetivos futuros dentro del campo del almacenamien... more En este artículo se revisan las necesidades y objetivos futuros dentro del campo del almacenamiento de energía y el papel de las baterías en el mismo. El estudio se centra en describir cuales son los retos y las necesidades de las baterías para electromovilidad y aplicaciones en red, así como el grado de desarrollo y proyección a futuro de diferentes tecnologías que se barajan como las "baterías del futuro". Finalmente, se revisan los proyectos relacionadas con baterías dentro del programa Horizon 2020.
Polysaccharides, May 3, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Journal of Electrostatics
La premisa fundamental del proyecto WiseGRID, que se está desarrollando en el marco del programa ... more La premisa fundamental del proyecto WiseGRID, que se está desarrollando en el marco del programa H2020, es mostrar como las Smart Grids pueden contribuir a la creación de un mercado energético europeo abierto, democrático y centrado en los ciudadanos. Se pretende demostrar como en las futuras microrredes y comunidades energéticas locales, el rol activo del consumidor es un componente necesario en el funcionamiento del mercado energético. Este trabajo describe los módulos clave desarrollados dentro del ecosistema WiseGRID que consiste en un marco coherente y sinérgico donde las diferentes soluciones basadas en integración de energías renovables, ESS, electromovilidad y autoconsumo, comparten y proporcionan servicios y funcionalidades entre sí.
Molecules, 2020
Sustainable activated carbon can be obtained from the pyrolysis/activation of biomass wastes comi... more Sustainable activated carbon can be obtained from the pyrolysis/activation of biomass wastes coming from different origins. Carbon obtained in this way shows interesting properties, such as high surface area, electrical conductivity, thermal and chemical stability, and porosity. These characteristics among others, such as a tailored pore size distribution and the possibility of functionalization, lead to an increased use of activated carbons in catalysis. The use of activated carbons from biomass origins is a step forward in the development of more sustainable processes enhancing material recycling and reuse in the frame of a circular economy. In this article, a perspective of different heterogeneous catalysts based on sustainable activated carbon from biomass origins will be analyzed focusing on their properties and catalytic performance for determined energy-related applications. In this way, the article aims to give the reader a scope of the potential of these tailor-made sustain...
Journal of Electrostatics, 2017
The development of cellular piezoelectric polymers has shown very promising results thanks to the... more The development of cellular piezoelectric polymers has shown very promising results thanks to their high d 33 piezoelectric constants which make them candidates for many applications. Cellular piezoelectric polymers, known as ferroelectrets, are obtained by means of an activation process which consists in generating an internal dipole with electrostatic charges produced by internal electric discharges. The most common system for this activation process is the application of a corona discharge on the surface of the sample in order to produce a high internal electric field. The theoretical electrostatic model of the process which is widely used is the Sessler model which relates the internal surface charge density, the air and polymer layers thickness, the dielectric permittivity of the polymer and the Young's Modulus of the cellular material to the d 33 piezoelectric constant. In our work, we relate the internal charges of the material with the d 33 piezoelectric constant by means of a surface potential scanning of cellular polypropylene biaxially stretched samples. Samples were charged by a corona discharge controlled with a triode electrode. Surface potentials were high enough to generate internal discharges and obtain measurable d 33 piezoelectric constants but low enough to be measured with spatial resolution by means of a 3kV electrostatic probe. Surface potential profiles showed some deviations from the expected bell-shape profile due to the internal electric field generated by the internal static charge. These deviations can be numerically related to the measured d 33 piezoelectric constant with the electrostatic Sessler model.
DYNA INGENIERIA E INDUSTRIA, 2014
Applied Physics Letters, 2013
DYNA INGENIERIA E INDUSTRIA, 2015
Actualmente se estan desarrollando nuevos tipos de baterias con resultados prometedores tanto par... more Actualmente se estan desarrollando nuevos tipos de baterias con resultados prometedores tanto para su aplicacion en sistemas estacionarios como moviles.
E3S Web of Conferences
The need for new clean energy sources for portable devices in biomedical, agro-food industry and ... more The need for new clean energy sources for portable devices in biomedical, agro-food industry and environmental related sectors boosts scientists towards the development of new strategies for energy harvesting for their application in biodevices development. In this sense, enzymatic biofuel cells (BFCs) have gained much attention in the last years. This work faces the challenge of develop new generation of BFCs able to be adapted to remote and personal monitoring devices within the framework of wearable technologies. To this aim, one of the main challenges consists of the development of conductive and biocompatible electrodes, which constitute a challenge itself due to the non-conductive capabilities of most of the biocompatible supports. Additionally, bioelectrodes may achieve good mechanical properties and resilience in order to be suitable for the envisioned application, which involves exposure to deformation during long-term use. Furthermore, it is desirable that the systems deve...
IEEE Transactions on Industry Applications
Predictive maintenance of electric motors is a topic of increasing importance in many industrial ... more Predictive maintenance of electric motors is a topic of increasing importance in many industrial applications. The mining industry is not an exception; many electric motors operating in mining facilities are critical machines and their unexpected failures may imply significant losses and can be hazardous for the users. Due to these facts, an increasing research effort has been dedicated to investigate on new techniques that are able to provide a reliable diagnostic of the motor condition. Over recent years, monitoring of electrical quantities (e.g. motor currents) has emerged as a very attractive option for determining the health of several motor parts (rotor, eccentricities, bearings) due to its very interesting advantages: possibility of remote motor monitoring, non-invasive nature, simple application, broad fault coverage…The traditional methods based on analysis of motor currents during steady-state operation (MCSA) are being complemented, when not replaced, by more reliable approaches. This work applies an innovative transient based methodology (ATCSA) to several case studies referred to large motors operating in mining facilities. The results prove how this modern methodology enables to overcome some important drawbacks of the classical MCSA, such as its unsuitability under varying speed conditions, and may provide an earlier indication of rotor electrical asymmetries under such working conditions.
The determination of the damper cage health is a matter of great importance in those industries t... more The determination of the damper cage health is a matter of great importance in those industries that use large synchronous motors in their processes. In the past, unexpected damages of that element implied economic losses amounting up to several million $. The problem is that, in the technical literature, there is a lack of non-invasive techniques enabling the reliable condition monitoring of this element. This explains the fact that, in industry, rudimentary methods are still employed to determine its condition. This paper proposes the analysis of the stray flux as a way to determine the condition of the damper cage. The paper shows that the analysis of the stray flux under starting yields characteristic time-frequency signatures of the fault components that can be used to reliably determine the condition of the damper. Moreover, the analysis of the stray flux at steady-state operation under asynchronous mode could give useful information to this end. The paper also analyses the in...
DYNA
The secure integration of electric vehicle (EV) plays a key role in the energy transition through... more The secure integration of electric vehicle (EV) plays a key role in the energy transition through a resilient and decarbonised economy. However, a massive EV penetration means a rise in electricity demand with negative consequences to the distribution systems (voltage drops, branches congestion, etc) if the charging infrastructure is not cybersecure and does not perform smart charging mechanisms. Furthermore, these new infrastructures and their operating procedures provide new chances to cyberattacks to be performed, aimed at either exploiting those grid vulnerabilities or acquiring some user’s private information. Therefore, to ease the secure integration of EV charging infrastructures in the future network, this paper presents a three-level actuation methodology for charging infrastructures, which includes active management of EV supply equipment (EVSE) to allow dynamic control of charges, installation of ancillary protection systems, planning of EVSE’s location within the distrib...
Energies
Distributed energy storage may play a key role in the operation of future low-carbon power system... more Distributed energy storage may play a key role in the operation of future low-carbon power systems as they can help to facilitate the provision of the required flexibility to cope with the intermittency and volatility featured by renewable generation. Within this context, this paper addresses an optimization methodology that will allow managing distributed storage systems of different technology and characteristics in a specific distribution network, taking into account not only the technical aspects of the network and the storage systems but also the uncertainties linked to demand and renewable energy variability. The implementation of the proposed methodology will allow facilitating the integration of energy storage systems within future smart grids. This paper’s results demonstrate numerically the good performance of the developed methodology.
Coupling device for high bandwidth power lines. # To measure discharge pulses caused by improper ... more Coupling device for high bandwidth power lines. # To measure discharge pulses caused by improper isolation line and / or communication signals as transmitted by the power line. Comprises a filter? T? (2), which in turn includes an inductor (L), an input capacitor (Ce) of line connection and an output connection to a measuring pulse discharge and / or measuring equipment communication signals transmitted by the line. The invention is novel in that the input capacitor (Ce) is high voltage and at least inductor is constituted by a circuit simulation induction, obtaining a device large bandwidth from units of KHz to tens of MHz, with a good frequency response so far unknown.
2020 8th International Conference on Smart Grid (icSmartGrid), 2020
Flexibility markets may play a key role in the operation of future low-carbon power systems as th... more Flexibility markets may play a key role in the operation of future low-carbon power systems as they can help to facilitate the provision of the required flexibility to cope with the intermittency and volatility featured by renewable generation. Within this context, this paper addresses the participation of an aggregator of residential customers in flexibility markets through intelligent management of the flexible home appliances of the customers. In particular, a novel methodology is proposed to maximize the benefits of both, namely the aggregator and its customers. The methodology relies on an efficient method wherein two types of modules are iteratively executed until a win-win solution is achieved. The first module is based on an optimization model which aims to maximize the economic profit earned by an aggregator that offers flexibility provided by its customers in local flexibility markets. On the contrary, the second module consists of a local platform for residential customer...
The 2021 Conference on Artificial Life, 2021
Growing cities are a world-wide phenomenon and simultaneously awareness about potential dangers d... more Growing cities are a world-wide phenomenon and simultaneously awareness about potential dangers due to air pollution, heat, and pathogens is increasing. Integrated and permanent monitoring of environmental features in cities can help to establish an early warning system and to provide data for policy makers. In our new project ‘WatchPlant,’ we propose a green approach for urban monitoring by a network of sensors tightly coupled with natural plants. We want to develop a sustainable, energy-efficient bio-hybrid system that harvests energy from living plants and utilizes methods of phytosensing, that is, using natural plants as sensors. We present our concept, here with focus on Alife-related methods operating on the gathered plant data and the bio-hybrid network. With a self-organizing network of sensors, that are alive, we hope to contribute to our future of livable green cities.
Dyna, 2021
La integracion de manera segura del vehiculo electrico (EV) es una pieza clave en la transicion e... more La integracion de manera segura del vehiculo electrico (EV) es una pieza clave en la transicion energetica hacia una economia descarbonizada y resiliente. Sin embargo, una alta penetracion del EV supone un incremento de la demanda electrica, con consecuencias negativas sobre las redes de distribucion (caidas de tension, congestion de lineas, etc.) si la infraestructura no esta protegida y no se introducen mecanismos de carga controlada. Ademas, estas nuevas infraestructuras y su modo de operacion estan expuestas a la realizacion de posibles ciberataques que buscan explotar las vulnerabilidades de la red, o bien obtener acceso a la informacion privada del usuario. Asi pues, con el objetivo de facilitar la integracion segura de las infraestructuras de recarga en el sistema electrico, este articulo presenta una metodologia de actuacion frente a ciberataques a tres niveles para infraestructuras de recarga, que incluye la gestion activa de las estaciones de recarga (EVSE) para permitir e...