Jose Manuel Andujar Marquez

• Doctor, Full professor
• Professor (Full) at University of Huelva

Battery technology has advanced due to the need for dependable energy storage in systems like electric vehicles (EVs) and portable electronics. Evaluating battery conditions and improving EV autonomy require precise models and control strategies. Predicting battery performance, however, is difficult because of several variables, including temperatu...

In recent years, there has been an increasing demand in Europe for energy efficiency standards to limit carbon dioxide emissions from the building sector. Due to the growing concern about global climate change, the energy consumption of buildings is in the spotlight because of the direct relationship between the energy demand for air conditioning a...

Few Project-based learning (PBL) has been a methodology traditionally associated with student engagement and good results. However, not all experiences are sufficiently satisfactory. Comprehensive models that explain the success or failure of these experiences are still lacking. The objective of this study was to understand the mechanisms that expl...

Few studies provide conceptual frameworks that help teachers make decisions about the scaffolding they will offer their students in project-based learning (PBL) processes. To address this deficiency, an adaptation of the motivational development self-system model was used and a PBL experience involving high school students who had to create an elec...

El auge reciente de las inteligencias artificiales (IAs), y más específicamente de las IAs generativas, está suponiendo la necesidad de un cambio de paradigma en las enseñanzas universitarias. La capacidad de las IAs de crear contenido, elaborar memorias, resúmenes y resolver problemas incluso complejos, debe provocar un cambio en muchos de los sis...

Accurate evaluation of grapevine water use is essential for optimizing water management and maximizing grapevine yield and berry quality in Mediterranean climates. Understanding the water and heat flux dynamics in a vineyard during grapevine berry maturation is of utmost importance. This study focuses on evaluating sensible and latent energy fluxes...

Advancing decarbonization critically depends on the integration of PV systems into mi-crogrids. However, this integration faces challenges, including the variability of photovoltaic solar energy production, the demands of energy management, and the complexities of grid synchronization and communication. To address these challenges, a PV emulator pl...

Resumen La reciente proliferación de las inteligencias artificiales (IA), en particular las IA generativas, está impulsando una necesidad de transformación en la educación universitaria. La habilidad de las IA para generar contenido, redactar informes, resúmenes y solucionar problemas de diversa complejidad, debería inducir una revisión de muchos d...

An electrical measurement network designed for analyzing power quality within microgrids is presented in this paper. It is very portable and easy to install across various types of microgrids. Data collected by the system meet the standards for measuring electrical parameters, calculating waveforms spectra and comparing results from different micro...

El olivar es un cultivo de gran importancia en los países de la cuenca mediterránea. En las últimas décadas, el sector olivarero ha experimentado una modernización en busca de incrementar la rentabilidad y productividad de sus explotaciones. En este contexto, la gestión basada en agricultura de precisión está mostrando un potencial prometedor. En e...

Power converters are the basic elements of any power electronics system in many areas and applications. Among them, the push-pull converter topology is one of the most widespread due to its high efficiency, versatility, galvanic isolation, reduced number of switching devices and the possibility of implementing high conversion ratios with respect to...

Thermostatically controlled loads (TCLs) play a crucial role in reducing energy consumption in buildings. Thus, developing accurate models that enable the effective implementation of energy control strategies is essential. With this goal in mind, a model of a room influenced by an air conditioning (AC) unit was developed as an initial starting poin...

Transport sector must be adapted to new energy model and integrate solutions that allow sustainable mobility, breaking dependency on oil and decreasing greenhouse emissions. In this sense, hydrogen technology is being considered a viable and reasonable alternative fuel. Then, in aerial transport applications, key challenges like weight and autonomy...

La reciente proliferación de las inteligencias artificiales (IAs), en particular las IAs generativas, está impulsando una necesidad de transformación en la educación universitaria. La habilidad de las IAs para generar contenido, redactar informes, resúmenes y solucionar problemas de diversa complejidad, debería inducir una revisión de muchos de los...

The need for energy-efficient buildings must be based on strong effective passive-design techniques, which coordinate indoor air quality and thermal comfort. This research describes the principles, simulation, implementation, and monitoring of two different natural cross-ventilation algorithm scenarios applied to a school-building case study affect...

Canopy conductance is a crucial factor in modelling plant transpiration and is highly responsive to water stress. The objective of this study is to develop a straightforward method for estimating canopy conductance (gc) in grapevines. To predict gc, this study combines stomatal conductance to water vapor (gsw) measurements from grapevine leaves, sc...

Thermostatically controlled loads have great potential to make a significant contribution to improving energy efficiency in the building sector, which is responsible for 40% of greenhouse gas emissions in the EU. This, in addition to the environmental damage, represents a huge expense in terms of the electricity bill. Therefore, it is very importan...

Thermostatically controlled loads have great potential to make a significant contribution to improving energy efficiency in the building sector, which is responsible for 40% of greenhouse gas emissions in the EU. This, in addition to the environmental damage, represents a huge expense in the electricity bill. Therefore, it is very important to trai...

Microgrids based on renewable energies are a topic of growing interest today. • The EMS is crucial in microgrids, many authors designed an EMS for a microgrid. • There is a lack of systematization of this process, from modelling to EMS design. • This article develops a complete standard methodology for MPC-based EMS design. • The methodology has be...

Hydrogen provides a clean source of energy that can be produced with the aid of electrolyzers. For electrolyzers to operate cost-effectively and safely, it is necessary to define an appropriate maintenance strategy. Predictive maintenance is one of such strategies but often relies on data from sensors which can also become faulty, resulting in fals...

Accurate and early olive-fruit yield estimation is a greatly desired objective in oliviculture as a tool to increase profitability and sustainability of the exploitations. This paper presents the design and testing of a novel methodology that, unlike previous proposals using models fed with indirect variables, exploits computer vision techniques to...

The current need to reduce carbon emissions makes hydrogen use essential for self-consumption in microgrids. To make a profitability analysis of a microgrid, the influence of equipment costs and the electricity price must be known. This paper studies the cost-effective electricity price (EUR/kWh) for a microgrid located at ''La Rábida Campus" (Univ...

Power converters are a basic element for the control and design of any power electronic system. Among the many available topologies, the push-pull converter is widely used due to its versatility, safety and efficiency. For its correct analysis, sizing, simulation and control, models that meet the characteristics of generality, accuracy and simplici...

The current climate crisis, aggravated by the human contribution to greenhouse gas emissions, highlights the urgent need to adopt climate policies that seek both to produce energy that does not involve carbon dioxide emissions (the main man-made greenhouse gas) and to reduce, as far as possible, the use of fossil fuels (which have a high carbon foo...

This study focuses on assessing the accuracy of supervised machine learning regression algorithms (MLAs) in predicting actual crop evapotranspiration (ETc act) for a deficit irrigated vineyard of Vitis vinifera cv. Tempranillo, influenced by a typical Mediterranean climate. The standard approach of using the Food and Agriculture Organization (FAO)...

Dimensionado de intercambiadores de calor horizontales enterrados para instalaciones de energía geotérmica de muy baja entalpía. Un caso práctico. Resumen En la actualidad, un parámetro fundamental para el correcto dimensionamiento de las instalaciones de energía geotérmica de muy baja entalpía (VLGE), sobre todo en aquellas con enterramiento horiz...

This paper presents an economic impact analysis and carbon footprint study of a hydrogen-based microgrid. The economic impact is evaluated with respect to investment costs, operation and maintenance (O&M) costs, as well as savings, taking into account two different energy management strategies (EMSs): a hydrogen-based priority strategy and a batter...

Outdoor public space is the setting for everyday social interaction where activities takeplace in order to satisfy collective urban needs. It is important to achieve climate-friendly urbandesign in order to ensure acceptable urban thermal comfort, especially in over-urbanised citycentres during summer periods. In this research, an urban canyon stre...

El Comité Español de Automática (CEA) es una asociación científica sin ánimo de lucro que impulsa el desarrollo, la investigación y las enseñanzasuniversitarias en Automática. Es miembro nacional de la Federación Internacional de Control Automático (IFAC), y celebra anualmente desde el año 1977 las Jornadas de Automática. Estas se organizan por dis...

Current climate crisis makes the need for reducing carbon emissions more than evident. For this reason, renewable energy sources are expected to play a fundamental role. However, these sources are not controllable, but depend on the weather conditions. Therefore, green hydrogen (hydrogen produced from water electrolysis using renewable energies) is...

Mechanical energy storage systems (MESS), which store energy to be released again in the form of mechanical energy, offer several advantages compared to other ESSs: lower environmental impact, lower levelized energy costs and greater sustainability.

Electrochemical energy storage (EcES), which includes all types of energy storage in batteries, is the most widespread energy storage system due to its ability to adapt to different capacities and sizes.

According to the comprehensive analysis developed along the book, there are different alternatives to energy storage depending on the application required.

Electrical energy storage systems (EESS) are the best method to directly store electricity (i.e., the energy storage is given in a pure format). Although this storage systems have a fast response and a high power density, they present several drawbacks such as a high self-discharge rate and a low energy density.

The use of thermal storage systems is not new; ancient civilizations already used this method for different purposes. Thus, there are documents dating from 350 years ago in Persia that emphasized the importance of ice or snow (which could be collected near lakes, rivers or mountains) for the preservation of food or cold drinks.

Chemical energy storage systems (CES), which are a proper technology for long-term storage, store the energy in the chemical bonds between the atoms and molecules of the materials.

Currently, the number of job offers in STEM careers (Science, Technology, Engineering and Mathematics) is growing up, but by contrast, the number of graduates in these fields is decreasing, particularly women graduates. Consequently, if we do not promote the training of women in STEM careers, the gender gap, far from narrowing, will continue to wid...

Society currently faces two crucial challenges: digital transition and energy transition. Educative innovation plays a key role in this challenging scenario, particularly engineering careers, where laboratory practices are as important as theoretical classes. This paper presents a standardized training platform supported by five European universiti...

This project aims to design, implement and test a technological demonstrator for the analysis and experimental validation of the use of hydrogen technologies in terrestrial robotic platforms for use in precision agriculture.

APU system for refrigerated light trucks based on hydrogen technology. • Integral solution based on BoP, power, control and acquisition electronics, control loops. • Step-by-step design of acquisition, control, and power electronics. • Validation of experimental performance on refrigerated light truck. • Proven performance of the proposed solution...

ScienCity es una actividad que viene siendo continuada desde 2018 con el objetivo de dar a conocer los conocimientos y tecnologías emergentes siendo investigados en las universidades, informar de experiencias, servicios e iniciativas puestas ya en marcha por instituciones y empresas, llegar hasta decisores políticos que podrían crear sinergias, inc...

Electric vehicles (EVs), in their pure and hybrid variants, have become the main alternative to ensure the decarbonization of the current vehicle fleet. Due to its excellent performance, EV technology is closely linked to lithium-ion battery (LIB) technology. A LIB is a complex dynamic system with extraordinary nonlinear behavior defined by electri...

The state of ripeness at harvest is a key piece of information for growers as it determines the market price of the yield. This has been traditionally assessed by destructive chemical methods, which lead to low-spatiotemporal resolution in the monitorization of crop development and poor responsiveness for growers. These limitations have shifted the...

Project-based learning (PBL) has been a methodology traditionally associated with student engagement and good results. However, not all experiences are sufficiently satisfactory. Comprehensive models that explain the success or failure of these experiences are still lacking. The objective of this study was to understand the mechanisms that explain...

The popularisation of aerial remote sensing using unmanned aerial vehicles (UAV), has boosted the capacities of agronomists and researchers to offer farmers valuable data regarding the status of their crops. This paper describes a methodology for the automated detection and individual delineation of tree crowns in aerial representations of crop fie...

The goal of this paper is to present an alternative solution based on renewable energies for the powertrain to supply in Remotely Piloted Aircraft Systems (RPAS), in order to increase their autonomy, reduce the noise footprint and eliminate polluting emissions throw into the atmosphere. Hybridizing hydrogen-based fuel cells and batteries allow obta...

This paper presents an ALAS project (Ref. 15/3ACT/PAC2021) founded by Spanish Women Institute. With the recent increase in jobs related to the STEM field and the low presence and participation of women in studies and professions related to this field, it represents a gap when it comes to accessing the labour market, despite the good academic result...

A R T I C L E I N F O Keywords: renewable-based microgrid High-voltage DC bus Air-cooled PE fuel cell Multi-stack architecture Isolated power converter Virtual instrument Real-time control and monitoring A B S T R A C T Currently, there is a growing interest in increasing the power range of air-cooled fuel cells (ACFCs), as they are cheaper, easier...

En este trabajo se presenta una aplicación del filtro de Kalman para tratar medidas altamente ruidosas de cara a su empleo en un sistema de control. En concreto, el sistema con el que se ha trabajado es un banco de potencia para motocicletas al que se ha añadido un ventilador de gran potencia capaz de generar una corriente de aire a una velocidad i...

The present work aims to evaluate a low-cost multispectral device for non-destructive grape ripening status assessment. The proposed device is based on a multispectral sensor, with a spectral response of 18 channels in a range from 410 to 940 nm. The experimental validation was carried out in a commercial vineyard in Rociana del Condado, Huelva. Th...

Urban public spaces are an essential part of the urban environment, supporting social relationships and promoting a healthy lifestyle among citizens. However, the high value of urban land has led to an over-urbanisation of cities, increasing urban heat stress and decreasing the number and size of public spaces. Rising air temperatures in cities – k...

Los métodos tradicionalmente empleados para la determinación del estado de calidad de frutas tienen una reducida resolución espacial y temporal derivada de sus limitaciones (elevado costo y amplia brecha temporal entre el muestreo y el acceso a la información). En las últimas décadas, se han publicado numerosos trabajos que destacan a los métodos b...

This study presents a preliminary evaluation of a low-cost multispectral device for the non-destructive assessment of olive fruits’ fat content. The developed device integrates a multispectral sensor, with a spectral response of 18 channels falling in a range from 410 to 940 nm, a calibrated light source, and a programmable board, in a ‘gun’-shaped...

El uso de robots en la agricultura facilita la monitorización continua del cultivo sin esfuerzo, de manera precisa y mediante diversos sensores que permitan monitorizar las necesidades de los cultivos. Sin embargo, para lograr aumentar la utilización de estos equipos a nivel industrial, se debe lograr que la autonomía de operación cubra (al menos)...

Las Jornadas de Automática (JA) son el evento más importante del Comité Español de Automática (CEA), entidad científico-técnica con más de cincuenta años de vida y destinada a la difusión e implantación de la Automática en la sociedad. Este año se celebra la cuadragésima tercera edición de las JA, que constituyen el punto de encuentro de la comunida...

Las Jornadas de Automática (JA) son el evento más importante del Comité Español de Automática (CEA), entidad científico-técnica con más de cincuenta años de vida y destinada a la difusión e implantación de la Automática en la sociedad. Este año se celebra la cuadragésima tercera edición de las JA, que constituyen el punto de encuentro de la comunida...

La necesidad de adecuar en todo momento la producción a la demanda energética de los hogares hace necesario, para microrredes basadas en fuentes de energías renovables (FER), el uso de sistemas de almacenamiento energético, para así acumular los excesos energéticos producidos por las energías renovables y usarlos en momentos de déficit de producció...

This paper aims to analyse two energy storage methods-batteries and hydrogen storage technologies-that in some cases are treated as complementary technologies, but in other ones they are considered opposed technologies. A detailed technical description of each technology will allow to understand the evolution of batteries and hydrogen storage techn...

Hybrid energy storage systems (HESS) are considered for use in renewable residential DC microgrids. This architecture is shown as a technically feasible solution to deal with the stochasticity of renewable energy sources, however, the complexity of its design and management increases inexorably. To address this problem, this paper proposes a fuzzy...

Water‐based hydrogen production is currently an attractive research field, as it provides a greener method to produce hydrogen than existing alternatives. Green hydrogen is expected to progressively replace fossil fuels, which are highly harmful environmentally. This paper presents a critical analysis over time of the main water splitting technolog...

The low presence and participation of women in Spain, in studies and professions linked to some STEM fields (Science, Technology, Engineering and Mathematics) is a transgenerational reality, despite the good academic results of women in science and technology. This vocational segregation has aroused the interest of the international scientific comm...

Los sistemas de almacenamiento en microrredes basadas en fuentes de energía renovable (FER) son elementos imprescindibles para adecuar la producción a la demanda, de modo que el exceso de energía renovable presente en la red en periodos determinados, pueda ser almacenado y utilizado en situaciones de déficit de producción. Como es sabido, las FER t...

The increasing use of renewable sources requires systems able to manage supply, store energy and meet demand, both locally and distributed to the main grid. The generation management, as well as storage and supply of energy to end users, requires adequate strategies and control systems, frequently based on simulations. This work proposes a methodol...

Green hydrogen has been postulated as an alternative of great interest in the sustainable storage of energy [1], [2]. Its production by electrolysis does not produce pollutants. In addition, if the electricity necessary for its production comes from renewable sources, [3]-[5]. Electrolysis technology is increasingly reaching milestones in its devel...

RESUMEN Este trabajo tiene por objeto explicar la génesis y situación actual del Comité Español de Automática (CEA), una de las sociedades científico-tecnológicas más antiguas y activas en España. El objetivo del artículo es describir cómo a partir de un embrión muy pequeño en Madrid y Barcelona a mediados del siglo pasado, CEA aglutina hoy a la in...

The standard methods for determining the quality of olives involve chemical methods that are time-consuming and expensive. These limitations lead growers to homogeneous harvesting based on subjective criteria such as intuition and visual decisions. In recent times, precision agriculture techniques for fruit quality assessment, such as spectroscopy,...

Battery-based energy storage systems (BESS) play a crucial role on renewable energy sources-based microgrids (RES-based microgrids) since they are responsible for lightening the difference between generation and consumption. For this purpose, a BESS is usually the only one device in RES-based microgrids that has two functions: (1) to supply energy...

This paper presents a comprehensive experimental analysis about the influence of supercapacitor banks as energy storage system (ESS) in renewable energy sources-based (RES-based) microgrids with high voltage DC bus. The analysis includes a comparison between the microgrid performance supported by conventional ESS such as batteries (lead-acid and li...

ScienCity es una actividad que viene siendo continuada desde 2018 con el objetivo de dar a conocer los conocimientos y tecnologías emergentes siendo investigados en las universidades, informar de experiencias, servicios e iniciativas puestas ya en marcha por instituciones y empresas, llegar hasta decisores políticos que podrían crear sinergias, inc...

Mediterranean viticulture is experiencing several constraints, especially related to climate changes and more adverse climatic conditions. Increasing frequency and magnitude of extreme climate events (e.g. warmer and dryer climate conditions, heat waves associated to more severe droughts) are putting pressure on the available water resources. Such...

In the Special Issue of Energies entitled Energy Efficiency in Buildings Both New and Rehabilitated that was published in 2019, a broad spectrum of research teams from around the world provided their latest findings on how to reduce energy consumption in the building sector [...]

Dseño, desarrollo, construcción y pruebas de un prototipo experimental de sistema híbrido formado por una pila de combustible.

Resumen Las microrredes basadas en energías renovables juegan un papel clave en el próximo modelo de transición energética. A pesar de sus bondades, la estocasticidad de estas fuentes de energía requiere del empleo de sistemas de almacenamiento de energía (SAE), lo que aumenta la complejidad del sistema. Para su correcta operación, es necesario el...

Few studies provide conceptual frameworks that help teachers make decisions about the scaffolding they will offer their students in project-based learning (PBL) processes. To address this deficiency, an adaptation of the motivational development self-system model was used and a PBL experience involving high school students who had to create an elec...

The increase in refrigerated food demand, due to increase on urban population is involving the replacement of conventional diesel-powered transport refrigeration units (TRUs) by electrical-based auxiliary power units APUs, in an imperious. This paper presents a turnkey solution of a hydrogen-based APU for a refrigeration unit integrated in short ha...

Project-based learning (PBL) has been widely used in technical studies and engineering education and has been traditionally associated with student engagement and providing user experience. Currently there is a lack of interest and a reduction in students in technical qualifications. As a way to improve the situation, authors have devised a project...

El proyecto Transporte Turístico Urbano Sostenible - T2UES pretende potenciar el desarrollo tecnológico de una red de vehículos eléctricos combinada con puntos de recarga inteligentes y ambientalmente sostenibles, para equipar las áreas turísticas de Huelva y El Algarve. Estos puntos de recarga son alimentados con energías renovables procedentes de...

This paper presents a prominent e-learning tool that is part of the collaborative European project REOPEN (Ref. 2020-1-IT02-KA226-HE-095424). Focused on the European energy transition and the problems derivatives from COVID-19, this project offers an educational tool to bring the digital transition to higher education. To undertake such challenge,...

This paper introduces a new, easy, fast and highly efficient PLL algorithm, that it does not need to adjust every time the input signal changes. This makes it independent of the input signal it receives and, therefore, and in a certain way, universally applicable. In addition, the proposal is implemented exclusively by software, housed in a microco...

In recent years the use of UAVs (Unmanned aerial vehicles) have proliferated in the civil sector for purposes such as search and rescue, remote sensing or real-time monitoring of road traffic, among others. In the architecture, engineering and construction fields (AEC) UAVs have demonstrated to be an ideal technology due to their optimal performanc...

This research was aimed at developing an efficient method for Nitrogen, Phosphorus, and Potassium (NPK) foliar content retrieval in olive trees by means of the analysis and modelling multispectral images taken by an unmanned aerial vehicle (UAV) under field conditions. To this end, an experiment was carried out in a super hight density olive orchar...

This paper presents the design, modelling and control simulation of the Balance of Plant (BoP) for a medium- size PEM (Proton Exchange Membrane) electrolyzer. Taking into consideration the main chemical process that occurs in the electrolysis of a PEM electrolyzer, the BoP must be clearly divided into two main parts: water management and hydrogen p...

Thermal comfort and energy performance of our buildings has been seriously improved during the last decades with the introduction of better envelope airtightness and mechanical ventilation systems. The arrival of Covid-19 has forced us to accept new natural ventilation protocols to improve the air quality inside buildings over other characteristics...

In this study the optimal sizing of a hybrid battery/hydrogen Energy Storage System “ESS” is assessed via a model-based parametric analysis in the context of a real hybrid renewable microgrid located in Huelva, Spain, supplying a realtime monitored residential load (3.5 kW; 5.6 MWh/year) in island mode. Four storage configurations (battery-only, H2...

This paper aims to highlight the drawbacks of the most common phase locked loop (PLL) circuits to operate as universal PLLs. The phase locked loop tracks the phase of an input signal. These devices are necessary in different disciplines for which the input signal conditions are very different. In fact, they are used in synchronization to the grid w...

The percentage of the population in urban areas has increased by ten points from 2000 (46%) to 2020 (56%); it is expected to reach up to 70% by 2050. This undoubtedly will encourage society to use alternative transports. On the other hand, the widespread fear of pandemics seems to be here to stay, and it is causing most people to leave public trans...

Energy management linked to building technology is a key factor within the objectives of the European Green Deal, as well as the Sustainable Development Goals. Towards climate neutrality, and the flexible and sustainable management of energy demand, many residential developments have installed photovoltaic systems in recent years, as well as batter...