Mariano Alarcón García

Mariano Alarcón García
University of Murcia | UM · Departamento de Electromagnetismo y Electrónica

Mechanical Eng.

About

74
Publications
15,930
Reads
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124
Citations
Citations since 2016
31 Research Items
67 Citations
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Introduction
Current research interests - Solar Thermal Energy - Renewable Energies (general overview) - Energy Efficiency in Industrial field and Buildings - Heat Transfer Enhancement - Teaching of Energy - Sustainable Mobility - Other Energetics: Energy Policies, Gender and Energy, Energy Poverty, etc. Methods and techniques - Network Simulation Method (numerical method) - Experimentation in Solar Thermal - Current works - Test of PVT solar collectors - Test of nanofluids in FPSC - FPSC numerical model

Publications

Publications (74)
Presentation
Full-text available
Presentación del nuevo software gratuito de simulación de comportamiento térmico de fluidos en tubos de sección circular HEATT© (Herramienta de Evaluación y Análisis Térmico en Tuberías). Presentation of the new free software for simulation of thermal behavior of fluids through circular section tubes HEATT© (Tool of Evaluation and Thermal analysis...
Article
This paper looks at the problem of fluid flow within pipes subjected to thermal asymmetrical boundary conditions, a problem faced in many real industrial situations, such as those related with solar thermal devices. But despite the asymmetry, much simpler bidimensional models based on radial symmetry are currently used for pipe design purposes, ign...
Article
Full-text available
Industry 4.0 facilities and organization structures are used to improve energy efficiency and maintenance in industry. One of the challenges of Industry 4.0 is the urgent need to lower the consumption of energy, water and raw materials, as well as to ensure the safe and reliable running of a plant and reduce maintenance costs. The work presented he...
Article
Distillation is one of the most common processes in companies of the chemical sector. Its overall performance cannot be based only on physical-chemical processes carried out, but as a whole, including maintenance and operation costs and trying to achieve the best possible energy efficiency. By means of predictive maintenance techniques, such as vib...
Article
Knowing the functional condition of production equipment at all times, that is, detecting and assessing any possible malfunction of it from the earliest stage of its appearance, is essential to avoid unforeseen interruptions in the production of any industrial plant. This work provides a methodology for the automatic assessment of the functional co...
Article
Full-text available
The mean temperature of flat plate solar thermal collectors (FPSTC) is used to calculate collector efficiency and other related parameters. This temperature is a key aspect for the determination of thermal losses or the inertial behavior of a collector. Consequently, the accurate determination of this parameter is of major interest to provide many...
Conference Paper
Facilities of Fourth Industrial Revolution, or Industry 4.0, are used to improve the use of energy as well the maintenance system of the industry. One of the challenges of Industry 4.0 is the answer to the urgent need to lower the energy, water and raw materials consumption. In this respect, systems related with Energy Management Systems and Mainte...
Conference Paper
Full-text available
RESUMEN En el estudio experimental de captadores solares planos de baja temperatura y, en concreto, de la cámara de aire que se forma entre el cristal y su superficie de captación, existe muy poca información publicada en revistas especializadas. Esta cámara de aire influye significativamente en el proceso de calentamiento del agua que circula por...
Presentation
Full-text available
Se presentan los mapas térmicos o campos de temperaturas obtenidos experimentalmente en dos captadores solares planos de distinta tipología y en días de diferente irradiación. Se emplean dos tipos de representación gráfica, una que contiene todos los datos a lo largo de un día y una segunda en 2D, dinámica, que permite observar el comportamiento de...
Conference Paper
Full-text available
RESUMEN En el presente trabajo se analizan las características del Método de Proyectos en el proceso de enseñanza-aprendizaje de distintos conceptos y contenidos relativos a la generación y uso de la Energía a partir del análisis de distintos proyectos propuestos en el Máster de Formación del Profesorado de la Universidad de Murcia. Para ello, se e...
Conference Paper
Full-text available
La experimentación real es fundamental para disponer de un profundo conocimiento del funcionamiento de los sistemas objeto de estudio. En esta contribución se tratará de describir algunos de los aspectos fundamentales de la instalación para la experimentación de la energía solar térmica que se desarrolla dentro de las actividades de investigación d...
Poster
Full-text available
El objetivo de este trabajo es analizar los fallos más comunes de las instalaciones solares térmicas de baja temperatura pertenecientes a la Universidad de Murcia y el mantenimiento que se les aplica, con el fin de proponer mejoras de aplicación al mismo para evitar o minimizar las averías y sus consecuencias. Para cumplir con el mismo se han anali...
Conference Paper
Full-text available
In this communication it is proposed a method for the selection of an insulation which can fit the requirements of the thermal envelope of a real portable cold room, as can be those of refrigerator trucks of trains. Those real conditions are the variable gain and loss of energy that occurs throughout the day due to environmental effects. Usually, t...
Presentation
Full-text available
Se presenta una colección de vídeos educativos en torno a la Refrigeración Industrial, preparados fundamentalmente para la docencia en el módulo del mismo título, aunque su interés es general. Para la realización de los vídeos se ha utilizado una instalación frigorífica experimental dotada de suficientes elementos para la experimentación de distint...
Conference Paper
Full-text available
Thermal bridges are an important source of thermal losses in tertiary sector. Computing package PROCCA© is presented as a tool for the analysis of thermal behavior of thermal bridges of materials with linear and non-linear characteristics and in stationary or transient processes. This analysis is the base for minimizing the thermal losses by means...
Article
A new approach to the heat transmission problem concerning a fully developed laminar flux inside a pipe subject to an abrupt change of temperature in non-reactive conditions is presented. By means of dimensional discriminated analysis, representative dimensionless groups of 2D governing equations and boundary conditions of the problem are managed i...
Conference Paper
The current communication is included in the area of study of learning scenario based on ICTs, specifically in ICT simulators for the improvement of the teaching-learning process. It is intended to make known a few applications proposed for new didactic materials which are useful both to expand the curriculum and to improve the teaching-learning pr...
Conference Paper
The main objective of this work is to show a proposal of an experimental approach of four different devices for different solar energy applications addressed to students of High Schools in any grade related to renewable energies. The competences of students which is pretended to increase are, beside the specific competences of renewable energy, ene...
Chapter
The main objective of this work is to show a proposal of an experimental approach of three different devices for different solar energy applications addressed to students of high schools. It aims to increase specific competences in renewable energy, energy conversion, properties of electrical circuits, optical concepts, among others, as well as tho...
Chapter
The current communication is included in the area of study of learning scenario based on ICTs, specifically in ICT simulators for the improvement of the teaching-learning process. It is intended to make known a few applications proposed for new didactic materials which are useful both to expand the curriculum and to improve the teaching-learning pr...
Conference Paper
Full-text available
It is described the procedure of taking measurements of temperature on two absorber plates which belong to two solar thermal low temperature collectors different topology. The thermal efficiency is determined through the measurement of the heating water. It flows through the pipes attached to the absorber plate by two different methods, one consist...
Conference Paper
Full-text available
It is described the procedure for manufacturing a T-type copper-constantan thermocouple in a laboratory, as well as the process followed for its calibration through a systematic method for simultaneous calibration of thermocouples with a minimum laboratory instrumentation while maintaining the "Measuring chain". Subsequently, the absorber surface h...
Article
In January 2012, Directive 2009/40/EC, of the European Parliament and of the Council, came into force, on roadworthiness tests for motor vehicles and their trailers, which Annex II was amended by Directive 2010/48/EU. This directive provides that, for measuring the braking effectiveness of vehicles of more than 3500 kg, it must be applies ISO 21069...
Conference Paper
Full-text available
The purpose of this communication is to present some applications proposed for new ICT teaching materials developed at the University of Murcia, useful to broaden the curriculum and improve the teaching-learning process of students of Higher Education Training Cycles in Matters related to Heat Transmission. Specifically, this communication describe...
Poster
Full-text available
Con objeto de conocer el modo de trabajo real de un colector plano de energía solar térmica se ha construido una instalación experimental sobre la base de un colector convencional, que ha permitido medir el campo de temperaturas sobre superficie captadora, así como otras variables adicionales (temperatura ambiente, del fluido caloportador, irradian...
Article
On a commercial vehicle, braking force is controlled by pressure limiting valves, which are responsible for distributing the braking force to individual axles of the vehicle depending on the load. Due to the importance of this system in vehicle safety, we propose a new universal inspection method that complies with Directives 2009/40/EC and 2010/48...
Article
In January 2012 Revision 7 of the Road Vehicles Inspection Manual came into force. The text of this Manual is based on Directive 2009/40/EC, amended by Directive 2010/48/EC, which modifies Annex II to the Directive, regarding technical inspections of motor vehicles and their trailers. It establishes, to measure the effectiveness of the service brak...
Conference Paper
Full-text available
In the scope of European directives and 2020 policies main concepts of energy effiency have been discussed. Strategies in industrial, residential and agricultural fields which use a bunch of current technologies in order to improve the generation and use of energy have been reviewed in those fields. Also the impact of recent standardsation in the f...
Conference Paper
Full-text available
L'équipe de l'Université de Murcie a participé avec de bons résultats à la prestigieuse compétition Shell Eco-Marathon (SEM) depuis 2008 dans la catégorie de prototypes avec moteur de combustion interne avec biocombustible (éthanol). L'équipe de l'Université de Murcie a été sélectionnée pour participer à la 27 ème édition de cette compétition dans...
Article
The heat transfer from cylinder to air of a 2-stroke internal combustion finned engine has been simulated. For this purpose, a 2-D model of the block and head has been done. Starting from the dimensions of a real annular cylindrical and spherical symmetric walls and fins have been used to obtain an equivalent simplified geometry, where the heat tra...
Article
The heat transfer from cylinder to air of a two-stroke internal combustion finned engine has been simulated. For this purpose, a 2D model of the block and head has been done. Starting from the geometry of a real engine, annular cylindrical and spherical symmetric walls to fins has been used to obtain an equivalent simplified geometry, where the hea...
Article
A zero-dimensional model is presented to simulate the transient processes occurring within a two-stroke SI engine. A two zone combustion model, with a spherically expanding flame front originating from the spark location, is applied. The model is numerically solved using the network simulation model which allows coupling the combustion model with a...
Conference Paper
Full-text available
Se presenta el diseño básico de un banco de ensayo de motores de combustión interna alternativos de baja potencia, diseñado especialmente para la docencia. El banco se ha realizado ensamblando distintos elementos, en su mayor parte comerciales. Consta de un freno Prony procedente de una motocicleta, célula de carga electrónica, acoplamiento es elás...
Conference Paper
Full-text available
Se realiza el estudio aerodinámico de la carrocería del vehículo diseñado para la competición Shell Eco-Marathon. Partiendo de un diseño en CAD, con la utilización de superficies NURBS, que cumple con la normativa de la competición, se realiza un mallado del prototipo para realizar una simulación con CFC de su comportamiento aerodinámico, cuyos res...
Chapter
Full-text available
1. EL CONTEXTO ACTUAL DEL AGUA EN LA REGIÓN DE MURCIA Desde principios del siglo XX, la Región de Murcia ha intentado aumentar por todos los medios —sobre todo, a través de obras y proyectos hidráulicos— los recursos hídricos disponibles al servicio del regadío, pero estos intentos, más que resolver el problema del agua, han provocado una espiral d...
Article
Transient heat conduction in fins undergoing different kinds of convective processes (film, transition, nucleated boiling and natural convection) as in multiboiling processes take place, is a strongly non-linear problem because of the abrupt changes in the heat transfer coefficient that occur at certain temperatures. Transient equations for the the...
Article
Full-text available
After evaluating the aptitude and/or suitability of the current coefficients for studying fin-wall systems, we propose three new performance indicators: ‘‘thermal reverse admittance’’, ‘‘specific reverse admittance,’’ and ‘‘relative reverse admittance.’’ They are especially suited to representing the performance of fin-wall systems under any hypoth...
Conference Paper
Full-text available
Optimisation of a longitudinal rectangular fin-wall assembly of a given volume subject to a set of geometrical restrictions was carried out by means of an application developed in the scope of the Network Simulation Method (NSM). From the partial differential equations of the problem, a network model was constructed. The optimisation application co...
Article
Full-text available
Transient thermal fields and heat fluxes due to step-harmonic temperature excitation and their dependence on frequency are studied in a fin-wall assembly. Application of the currently used efficiency coefficient to transient-harmonic processes is discussed. A new coefficient, thermal reverse transfer admittance, and others, including the augmentati...
Article
Full-text available
The classical performance indicators for extended surfaces, efficiency and effectiveness, cannot be used for the proper design of finned systems subject to time-dependent processes, such as heat exchangers or electric devices. Based on the network simulation method, a network model of a fin-wall assembly, whose admittance is identical to the therma...
Article
Full-text available
Low thermal level water sources can be used as an auxiliary energy to control the greenhouse climate by means of a buried water pipes system. An adequate design of the soil heating system requires to know the influence of each design parameters involved in the heat transfer process. The transient heat flux density as a function of these parameters...
Thesis
Full-text available
La tesis estudia en profundidad los sistemas aleta-pared para la transmisión de calor mediante en método de simulación por redes (MESIR). Para ello define un conjunto de nuevos coeficientes de eficiencia adecuados a esta configuración, las llamadas admitancias térmicas inversas, e introduce el concepto de "red de transferencia". Mediante estas herr...
Conference Paper
Full-text available
Transient temperatures and fluxes fields resulting from freezing processes of foods are studied by means of the Network Simulation Method. With this aim in view and starting from the mathematical model of the problem -which includes the variations of thermal characteristics conductivity and specific heat with temperature, given generally by tables-...
Conference Paper
Full-text available
Based on the Network Simulation Method, a new and simple method for evaluating transient thermal responses, temperature fields and fluxes under any kind of lineal or non-lineal boundary condition, including radiation, is presented in this paper. Non-linearity associated with variations in temperature-dependent thermal characteristics (conductivity...
Conference Paper
Full-text available
La transmisión de calor entre la cámara de combustión y el ambiente en un motor de combustión interna alternativo es un proceso muy complejo, debido a su no linealidad (dependencia de la temperatura del coeficiente de película), a la ciclicidad del mismo y a la compleja geometría que suele presentarse en estos motores. Las aletas (superficies adici...
Conference Paper
Se determinan el campo térmico transitorio y los flujos de calor en superficies extendidas (aletas), de geometría unidimensional, en las que existe una generación interna de calor dependiente de la temperatura de forma general. Las condiciones de contorno en los extremos pueden ser de primera o segunda clase y existe convección en su superficie lat...
Conference Paper
La conducción de calor transitoria en geometrías cilíndrica y esférica en medios cuyas características térmicas, conductividad y calor específico, son dependientes de la temperatura constituye un problema no lineal cuya solución requiere del uso de métodos numéricos. Mediante el Método de simulación por redes y para dependencias de tipo polinómico,...
Article
The transient thermal responses observed in a slab, the thermal conductivity and specific heat of which showed polynomial temperature dependence, were simulated digitally by means of the network method. A general network model for this process is proposed regardless of the polynomial degree, which includes initial and boundary conditions. With this...
Article
A network model has been designed to analyze heat conduction problems in solids in which both conductivity and specific heat vary in lineal form with the temperature. The software PSPICE, for the simulation of electric circuits, is used to simulate the behavior of the network model. The system requires a few electrical devices only, devices which a...
Conference Paper
Full-text available
Se estudia la distribución de temperaturas y el flujo de calor, en régimen transitorio, en un sistema aleta recta-pared unidimensional, siendo armónica la dependencia temporal de la temperatura en la pared. El análisis se lleva a cabo mediante el método de redes, para lo que se establece el modelo en red del proceso de difusión térmica en la aleta,...
Conference Paper
Full-text available
El presente trabajo aborda, mediante el método de redes, el estudio de aletas en dos dimensiones, tanto en régimen estacionario como transitorio. Para ello se simulan aletas aisladas o formando un conjunto con la pared que las soporta, para distintos parámetros térmicos.
Article
Full-text available
ESTUDIO DE LA IMPORTANCIA DEL MANTENIMIENTO EN LOS NEUMÁTICOS DE LOS VEHÍCULOS. Antonio González Carpena1; José Carretero Aznar2; Félix C. Gómez de León Hijes3; Mariano Alarcón García4 1 Inspecciones de Murcia, S.A. 2 Tüv Rheinland Ibérica. 3 Área de Ingeniería Mecánica. Universidad de Murcia 4 Área de Máquinas y Motores Térmicos. Universidad de...

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