Luis M. Fernández-AhumadaUniversity of Cordoba (Spain) | UCO · Department of Computer Sciences and Numerical Analysis
Luis M. Fernández-Ahumada
Doctor of Engineering
About
23
Publications
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182
Citations
Citations since 2017
Introduction
Skills and Expertise
Publications
Publications (23)
Increasing daylighting levels contributes to improving the energy efficiency of buildings and consequently to the fight against climate change. This work presents a new illuminator based on a previous single-axis polar heliostat. This heliostat allows redirecting sunlight to a specific space to be illuminated at any time of the day. The system pres...
Renewable energies play an important role as a solution to the challenge of satisfying the growing global energy demand without jeopardizing the achievements in the fight against climate change. Given this panorama, different countries, including Spain, have developed policies to promote renewable energies. One of the technologies that benefit from...
Agrivoltaics is currently presented as a possible effective solution to one of society’s greatest challenges: responding to the increasing demand for energy and food in an efficient and sustainable manner. To this end, agrivoltaics proposes to combine agricultural and renewable energy production on the same land using photovoltaic technology. The p...
The fight against climate change makes it necessary, among other measures, to improve the energy efficiency of buildings. One way of doing this is to improve the levels of natural lighting inside buildings. In this sense, this paper analyses the possible use of heliostats as natural illuminators in an educational space. For this purpose, a classroo...
The continuous growth of the world population is causing an increase in the demands for food and energy of the population. Given these circumstances and the negative consequences derived from climate change, it is necessary to evolve towards a more efficient and sustainable agricultural system. In this sense, the agrivoltaic proposes to combine agr...
The growing need to increase environmental and energy sustainability in buildings (housing, offices, warehouses, etc.) requires the use of solar radiation as a renewable source of energy that can help to lower carbon footprint, making buildings more efficient and thereby contributing to a more sustainable planet, while enhancing the health and well...
World population growth is leading to an increased demand for energy and food. This is creating a conflict over land use as terrain for large renewable energy facilities is not available for agricultural. As a solution, agrivoltaics combines the use of the land for agricultural and photovoltaic exploitation. In this work, the conversion of photovol...
![Figure 1. Function of self-consumption surpluses in Spain in [22,23].](publication/353284222/figure/fig1/AS:1046064081682432@1626412520698/Function-of-self-consumption-surpluses-in-Spain-in-22-23_Q320.jpg)
![Figure 5. Hourly profiles of demand in: (a) January and (b) July [36].](publication/353284222/figure/fig3/AS:1046064085868544@1626412521511/Hourly-profiles-of-demand-in-a-January-and-b-July-36_Q320.jpg)
PV self-consumption can contribute positively to the spread of PV and, therefore, to the progress of renewable energies as a key element in a decarbonized energy model. However, the policies of each country regarding the promotion of this type of renewable technology is fundamental for their growth. Despite the high number of sunshine hours registe...
Solar tracking is an efficient strategy to increase the radiative capture of photovoltaic collectors. Within the multiple efforts made in recent decades to improve the production of these facilities, various works have studied solutions to optimize the number of rotation axes (single or dual rotation axes), the degree of collector coverage, the dis...
In this work, an omnidirectional sensor that enables identification of the direction of the celestial sphere with maximum solar irradiance is presented. The sensor, based on instantaneous measurements, functions as a position server for dual-axis solar trackers in photovoltaic plants. The proposed device has been developed with free software and ha...
This paper investigates how to optimally orient the photovoltaic solar trackers of an axis parallel to the terrain, applying the sky model of Hay–Davies. This problem has been widely studied. However, the number of studies that consider the orientation (inclination and azimuth of the terrain) is very limited. This paper provides an examination of i...
Photovoltaics is experiencing significant growth because it is a renewable energy resource capable of contributing positively to the global energy system. However, the high variability in solar resources and the inter-collectors shadows negatively influence the energy conversion of a photovoltaic plant, making it necessary to develop technologies t...
![Figure 2. Top Internet of things (IoT) platforms. Source: [55].](profile/J-Ramirez-Faz/publication/339075497/figure/fig1/AS:855574870761474@1580996353745/Top-Internet-of-things-IoT-platforms-Source-55_Q320.jpg)
The control of refrigeration in the food chain is fundamental at all stages, with special emphasis on the retail stage. The implementation of information and communication technologies (IoT, open-source hardware and software, cloud computing, etc.) is representing a revolution in the operational paradigm of food control. This paper presents a low-c...
![Figure 10. Generation of the rays on the selected point. Adapted from [45].](profile/J-Ramirez-Faz/publication/337440178/figure/fig2/AS:827970465832963@1574414950400/Generation-of-the-rays-on-the-selected-point-Adapted-from-45_Q320.jpg)
The growing need to improve the environmental and energy sustainability of buildings involves the use of solar radiation incident on their surfaces. However, in cities, this task is complicated due to the constructive geometry that leads to shading between buildings. In this context, this work presents a study of solar access to the façades of buil...
Solar tracking is a technique required to increase energy production in multiple photovoltaic (PV) facilities. In these plants, during low-elevation solar angle hours, shadows appear between the collectors causing a dramatic decrease in production. This paper presents a novel optimal tracking strategy to prevent the creation of these shadows. The p...
![Figure 1. Data rate vs. range in communication networks. Source: [27].](publication/333226782/figure/fig1/AS:760813568684033@1558403498569/Data-rate-vs-range-in-communication-networks-Source-27_Q320.jpg)
In recent decades, considerable efforts have been devoted to process automation in agriculture. Regarding irrigation systems, this demand has found several difficulties, including the lack of communication networks and the large distances to electricity supply points. With the recent implementation of LPWAN wireless communication networks (SIGFOX,...
Presentation of the Solar Energy Assessment and Planning Tool (SEAP) service
This paper presents the analytical deduction of generic and unified equations of the movement of solar tracking systems. These equations reproduce published equations, which only consider the sun position, or the equations of the astronomical movement. As a novelty, these equations are more generic, thus allowing the optimization of the positioning...
Background
Axial spondyloarthritis (axSpA) is a chronic rheumatic disease that causes reduction of mobility in the patients' spine. There are several indices to analyze this mobility: BASMI, which lacks precision and sensitivity to change according to different authors, and UCOASMI (1) based on motion capture, which needs extensive resources that l...
Projects
Project (1)
Climate variability and change (CVC) embody sizeable economic, social and environmental risks in Europe and globally. Climate Services (CSs) are essential for catalysing economic and societal transformations that not only reduce these risks and/or improve societal resilience, but also unlock Europe’s innovation potential, competitiveness and economic growth. As a part of European efforts to catalyse the potential of climate services for more efficient natural resource management and improved disaster risk management and resilience, the CLARA project will boost innovation and uptake of climate services based on front line seasonal and decadal forecasts and climate projections. Building upon the advancements in climate modelling and science in the context of Copernicus Climate Change Service (C3S), the CLARA project will illustrate genuine benefits and economic value of CSs in the face of climate variability and short-term climate change. A portfolio of user co-designed and co-developed climate services will help to improve policy and decision makings in the five priority areas: disaster risk reduction, water resource management, agriculture and food (security), renewables energy sources, and public health. Carefully designed business and marketing strategies will promote their uptake, help to energise the European market with climate services, and foster the European innovation potential.
In the framework the renewable energy the Solar Energy Assessment and Planning Tool (SEAP) service is being developed. SEAP is a service to provide spatial and operational assessment of a solar energy systems (SES) based on prediction of climate variables on different time scales: monthly, seasonal and annual. The existing service will be available in operational mode and will offer the best alternatives for photovoltaic plants, the user can act on, either managing the priority of consumption in autonomous installations or determining the most appropriate tracking for each day.
